publicdata/nist-gov
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions
nist-gov/www.nist.gov/ncnr/chrns-vsans-very-small-angle-neutron-scattering

1235 lines
84 KiB
Text
Raw Normal View History

Initital commit.
2025-03-05 18:59:57 +00:00
<!DOCTYPE html>
<html lang="en" dir="ltr" prefix="content: http://purl.org/rss/1.0/modules/content/ dc: http://purl.org/dc/terms/ foaf: http://xmlns.com/foaf/0.1/ og: http://ogp.me/ns# rdfs: http://www.w3.org/2000/01/rdf-schema# schema: http://schema.org/ sioc: http://rdfs.org/sioc/ns# sioct: http://rdfs.org/sioc/types# skos: http://www.w3.org/2004/02/skos/core# xsd: http://www.w3.org/2001/XMLSchema# ">
<head>
<meta charset="utf-8" /><script type="text/javascript">(window.NREUM||(NREUM={})).init={ajax:{deny_list:["bam.nr-data.net"]}};(window.NREUM||(NREUM={})).loader_config={licenseKey:"37b7ccb661",applicationID:"1089704227"};;/*! For license information please see nr-loader-rum-1.283.2.min.js.LICENSE.txt */
(()=>{var e,t,r={122:(e,t,r)=>{"use strict";r.d(t,{a:()=>i});var n=r(944);function i(e,t){try{if(!e||"object"!=typeof e)return(0,n.R)(3);if(!t||"object"!=typeof t)return(0,n.R)(4);const r=Object.create(Object.getPrototypeOf(t),Object.getOwnPropertyDescriptors(t)),o=0===Object.keys(r).length?e:r;for(let a in o)if(void 0!==e[a])try{if(null===e[a]){r[a]=null;continue}Array.isArray(e[a])&&Array.isArray(t[a])?r[a]=Array.from(new Set([...e[a],...t[a]])):"object"==typeof e[a]&&"object"==typeof t[a]?r[a]=i(e[a],t[a]):r[a]=e[a]}catch(e){(0,n.R)(1,e)}return r}catch(e){(0,n.R)(2,e)}}},555:(e,t,r)=>{"use strict";r.d(t,{Vp:()=>c,fn:()=>s,x1:()=>u});var n=r(384),i=r(122);const o={beacon:n.NT.beacon,errorBeacon:n.NT.errorBeacon,licenseKey:void 0,applicationID:void 0,sa:void 0,queueTime:void 0,applicationTime:void 0,ttGuid:void 0,user:void 0,account:void 0,product:void 0,extra:void 0,jsAttributes:{},userAttributes:void 0,atts:void 0,transactionName:void 0,tNamePlain:void 0},a={};function s(e){try{const t=c(e);return!!t.licenseKey&&!!t.errorBeacon&&!!t.applicationID}catch(e){return!1}}function c(e){if(!e)throw new Error("All info objects require an agent identifier!");if(!a[e])throw new Error("Info for ".concat(e," was never set"));return a[e]}function u(e,t){if(!e)throw new Error("All info objects require an agent identifier!");a[e]=(0,i.a)(t,o);const r=(0,n.nY)(e);r&&(r.info=a[e])}},217:(e,t,r)=>{"use strict";r.d(t,{D0:()=>m,gD:()=>v,xN:()=>h});r(860).K7.genericEvents;const n="experimental.marks",i="experimental.measures",o="experimental.resources",a=e=>{if(!e||"string"!=typeof e)return!1;try{document.createDocumentFragment().querySelector(e)}catch{return!1}return!0};var s=r(614),c=r(944),u=r(384),l=r(122);const d="[data-nr-mask]",f=()=>{const e={feature_flags:[],experimental:{marks:!1,measures:!1,resources:!1},mask_selector:"*",block_selector:"[data-nr-block]",mask_input_options:{color:!1,date:!1,"datetime-local":!1,email:!1,month:!1,number:!1,range:!1,search:!1,tel:!1,text:!1,time:!1,url:!1,week:!1,textarea:!1,select:!1,password:!0}};return{ajax:{deny_list:void 0,block_internal:!0,enabled:!0,autoStart:!0},distributed_tracing:{enabled:void 0,exclude_newrelic_header:void 0,cors_use_newrelic_header:void 0,cors_use_tracecontext_headers:void 0,allowed_origins:void 0},get feature_flags(){return e.feature_flags},set feature_flags(t){e.feature_flags=t},generic_events:{enabled:!0,autoStart:!0},harvest:{interval:30},jserrors:{enabled:!0,autoStart:!0},logging:{enabled:!0,autoStart:!0},metrics:{enabled:!0,autoStart:!0},obfuscate:void 0,page_action:{enabled:!0},page_view_event:{enabled:!0,autoStart:!0},page_view_timing:{enabled:!0,autoStart:!0},performance:{get capture_marks(){return e.feature_flags.includes(n)||e.experimental.marks},set capture_marks(t){e.experimental.marks=t},get capture_measures(){return e.feature_flags.includes(i)||e.experimental.measures},set capture_measures(t){e.experimental.measures=t},capture_detail:!0,resources:{get enabled(){return e.feature_flags.includes(o)||e.experimental.resources},set enabled(t){e.experimental.resources=t},asset_types:[],first_party_domains:[],ignore_newrelic:!0}},privacy:{cookies_enabled:!0},proxy:{assets:void 0,beacon:void 0},session:{expiresMs:s.wk,inactiveMs:s.BB},session_replay:{autoStart:!0,enabled:!1,preload:!1,sampling_rate:10,error_sampling_rate:100,collect_fonts:!1,inline_images:!1,fix_stylesheets:!0,mask_all_inputs:!0,get mask_text_selector(){return e.mask_selector},set mask_text_selector(t){a(t)?e.mask_selector="".concat(t,",").concat(d):""===t||null===t?e.mask_selector=d:(0,c.R)(5,t)},get block_class(){return"nr-block"},get ignore_class(){return"nr-ignore"},get mask_text_class(){return"nr-mask"},get block_selector(){return e.block_selector},set block_selector(t){a(t)?e.block_selector+=",".concat(t):""!==t&&(0,c.R)(6,t)},get mask_input_options(){return e.mask_input_options},set mask_input_options(t){t&&"object"==typeof t?e.mask_input_options={...t,password:!0}:(0,c.R)(7,t)}},session_trace:{enabled:!0,autoStart:!0},soft_navigations:{enabled:!0,autoStart:!0},spa:{enabled:!0,autoStart:!0
<noscript><style>form.antibot * :not(.antibot-message) { display: none !important; }</style>
</noscript><script async src="https://www.googletagmanager.com/gtag/js?id=G-HEQ0YF2VYL"></script>
<script>window.dataLayer = window.dataLayer || [];function gtag(){dataLayer.push(arguments)};gtag("js", new Date());gtag("set", "developer_id.dMDhkMT", true);gtag('set', {'cookie_flags': 'SameSite=None;Secure', 'cookie_domain': 'www.nist.gov'});gtag("config", "G-HEQ0YF2VYL", {"groups":"default","page_placeholder":"PLACEHOLDER_page_location","link_attribution":true,"allow_ad_personalization_signals":false});gtag("config", "G-CSLL4ZEK4L", {"groups":"default","page_placeholder":"PLACEHOLDER_page_location","link_attribution":true,"allow_ad_personalization_signals":false});gtag("event", "custom", {"node_title":"CHRNS VSANS - Very Small-Angle Neutron Scattering","node_id":"1524241","content_type":"NCNR Instrument"});</script>
<meta name="description" content=" " />
<link rel="canonical" href="https://www.nist.gov/ncnr/chrns-vsans-very-small-angle-neutron-scattering" />
<link rel="shortlink" href="https://www.nist.gov/node/1524241" />
<meta name="citation_title" content="CHRNS VSANS - Very Small-Angle Neutron Scattering | NIST" />
<meta property="og:site_name" content="NIST" />
<meta property="og:type" content="Article" />
<meta property="og:url" content="https://www.nist.gov/ncnr/chrns-vsans-very-small-angle-neutron-scattering" />
<meta property="og:title" content="CHRNS VSANS - Very Small-Angle Neutron Scattering" />
<meta property="og:description" content=" " />
<meta property="og:image" content="https://www.nist.gov/themes/custom/nist_www/img/homepage/nist_mark.png" />
<meta property="article:published_time" content="2018-10-01T15:32-04:00" />
<meta property="article:modified_time" content="2023-06-20T16:28-04:00" />
<meta name="dcterms.title" content="CHRNS VSANS - Very Small-Angle Neutron Scattering" />
<meta name="dcterms.description" content=" " />
<meta name="dcterms.date" content="2018-10-01T15:32-04:00" />
<meta name="dcterms.type" content="text" />
<meta name="dcterms.format" content="text/html" />
<meta name="dcterms.identifier" content="https://www.nist.gov/ncnr/chrns-vsans-very-small-angle-neutron-scattering" />
<meta name="dcterms.source" content="NIST" />
<meta name="dcterms.created" content="2018-10-01T15:32-04:00" />
<meta name="dcterms.modified" content="2023-06-20T16:28-04:00" />
<meta name="twitter:card" content="summary_large_image" />
<meta name="twitter:description" content=" " />
<meta name="twitter:site" content="NIST" />
<meta name="twitter:title" content="CHRNS VSANS - Very Small-Angle Neutron Scattering" />
<meta name="google-site-verification" content="QMu0ODkER3rN5hLcMLqNVf7e3bkjYsNLTuhqfH48jCA" />
<meta name="Generator" content="Drupal 10 (https://www.drupal.org)" />
<meta name="MobileOptimized" content="width" />
<meta name="HandheldFriendly" content="true" />
<meta name="viewport" content="width=device-width, initial-scale=1.0" />
<meta name="nist_search_modified" class="elastic" content="2023-06-20T16:28:00-04:00" />
<meta name="nist_search_bundle" class="elastic" content="ncnr_instrument" />
<link rel="icon" href="/themes/custom/nist_www/favicon.ico" type="image/vnd.microsoft.icon" />
<title>CHRNS VSANS - Very Small-Angle Neutron Scattering | NIST</title>
<link rel="stylesheet" media="all" href="/sites/default/files/css/css_S-nKeYGErPfrCNyTfOCwMk0p4PxnlUktAxl_erXxkP8.css?delta=0&amp;language=en&amp;theme=nist_www&amp;include=eJxtjusOwyAIhV_I1EcyqLQlxUtA5_b2c-ua_llCCOeED46HcLhWZlXr79lRKNlk0ubajgmnV9iDuFSijaTgGR1TPoy-tGGarOJ3325cPPDJjjEujc_22bdRegVefvJEEmyZVgpmJW4oNkBtNP9XENgE6q4XdjtLz7V7Jt0xmgfhUPvty0zYGc28k5zgioI5zPyCaP94LqjeWRMFKUoN3xeHbj8" />
<link rel="stylesheet" media="all" href="/sites/default/files/css/css_kGS0ApDpFo-_3JI4Ijxg4RCWlTqsImK3lqH7bCv5v2U.css?delta=1&amp;language=en&amp;theme=nist_www&amp;include=eJxtjusOwyAIhV_I1EcyqLQlxUtA5_b2c-ua_llCCOeED46HcLhWZlXr79lRKNlk0ubajgmnV9iDuFSijaTgGR1TPoy-tGGarOJ3325cPPDJjjEujc_22bdRegVefvJEEmyZVgpmJW4oNkBtNP9XENgE6q4XdjtLz7V7Jt0xmgfhUPvty0zYGc28k5zgioI5zPyCaP94LqjeWRMFKUoN3xeHbj8" />
<link rel="stylesheet" media="print" href="/sites/default/files/css/css_-IXwLuTUdm8IGHxib8GX8wWKw3LjKsNWSYYskZ5fEGg.css?delta=2&amp;language=en&amp;theme=nist_www&amp;include=eJxtjusOwyAIhV_I1EcyqLQlxUtA5_b2c-ua_llCCOeED46HcLhWZlXr79lRKNlk0ubajgmnV9iDuFSijaTgGR1TPoy-tGGarOJ3325cPPDJjjEujc_22bdRegVefvJEEmyZVgpmJW4oNkBtNP9XENgE6q4XdjtLz7V7Jt0xmgfhUPvty0zYGc28k5zgioI5zPyCaP94LqjeWRMFKUoN3xeHbj8" />
<link rel="stylesheet" media="all" href="/sites/default/files/css/css_RS8YGnRq2Xi5aD-GQC3GKwBe6bOWBBmEmXrb2xB5FMM.css?delta=3&amp;language=en&amp;theme=nist_www&amp;include=eJxtjusOwyAIhV_I1EcyqLQlxUtA5_b2c-ua_llCCOeED46HcLhWZlXr79lRKNlk0ubajgmnV9iDuFSijaTgGR1TPoy-tGGarOJ3325cPPDJjjEujc_22bdRegVefvJEEmyZVgpmJW4oNkBtNP9XENgE6q4XdjtLz7V7Jt0xmgfhUPvty0zYGc28k5zgioI5zPyCaP94LqjeWRMFKUoN3xeHbj8" />
<script src="/sites/default/files/js/js_GM8kl6wk698qKTTwusj83bCoGHHtOZ1UinjY1sE_Qbk.js?scope=header&amp;delta=0&amp;language=en&amp;theme=nist_www&amp;include=eJxdjdsOwjAIhl9I5ZEaurIOR8vSotW3tzsYzRIu4OM_eBxmZ9pnAf_b3b1eomoUcphR3sZDhTO4ZK7mRu4saMuiGJyVHsI5QsT9XdmI01L0SXAGa8vGbKJEvVfFY3FJAwSu6HuwcJ43DURRj3I9LDARBirf07XW_hT0stUIoTwWlNtx7saEMfPIwwflMGLc"></script>
</head>
<body class="node-1524241">
<a href="#main-content" class="visually-hidden focusable" data-elastic-exclude>
Skip to main content
</a>
<div class="dialog-off-canvas-main-canvas" data-off-canvas-main-canvas>
<!-- nist-index-ignore-start -->
<section data-elastic-exclude class="usa-banner" aria-label="Official government website">
<div class="usa-accordion">
<header class="usa-banner__header">
<div class="usa-banner__inner">
<div class="grid-col-auto">
<img class="usa-banner__header-flag" src="/libraries/nist-component-library/dist/img/us_flag_small.png" alt="U.S. flag">
</div>
<div class="grid-col-fill tablet:grid-col-auto">
<p class="usa-banner__header-text">An official website of the United States government</p>
<p class="usa-banner__header-action" aria-hidden="true">Here’s how you know</p>
</div>
<button class="usa-accordion__button usa-banner__button" aria-expanded="false" aria-controls="gov-banner-default">
<span class="usa-banner__button-text">Here’s how you know</span>
</button>
</div>
</header>
<div class="usa-banner__content usa-accordion__content" id="gov-banner-default">
<div class="grid-row grid-gap-lg">
<div class="usa-banner__guidance tablet:grid-col-6">
<img class="usa-banner__icon usa-media-block__img" src="/libraries/nist-component-library/dist/img/icon-dot-gov.svg" role="img" alt="" aria-hidden="true">
<div class="usa-media-block__body">
<p>
<strong>Official websites use .gov</strong>
<br/>
A <strong>.gov</strong> website belongs to an official government organization in the United States.
</p>
</div>
</div>
<div class="usa-banner__guidance tablet:grid-col-6">
<img class="usa-banner__icon usa-media-block__img" src="/libraries/nist-component-library/dist/img/icon-https.svg" role="img" alt="" aria-hidden="true">
<div class="usa-media-block__body">
<p>
<strong>Secure .gov websites use HTTPS</strong>
<br/>
A <strong>lock</strong> ( <span class="icon-lock">
<svg xmlns="http://www.w3.org/2000/svg" width="52" height="64" viewbox="0 0 52 64" class="usa-banner__lock-image" role="img" aria-labelledby="banner-lock-title banner-lock-description" focusable="false">
<title id="banner-lock-title">Lock</title>
<desc id="banner-lock-description">A locked padlock</desc><path fill="#000000" fill-rule="evenodd" d="M26 0c10.493 0 19 8.507 19 19v9h3a4 4 0 0 1 4 4v28a4 4 0 0 1-4 4H4a4 4 0 0 1-4-4V32a4 4 0 0 1 4-4h3v-9C7 8.507 15.507 0 26 0zm0 8c-5.979 0-10.843 4.77-10.996 10.712L15 19v9h22v-9c0-6.075-4.925-11-11-11z"/></svg>
</span>
) or <strong>https://</strong> means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.
</p>
</div>
</div>
</div>
</div>
</div>
</section>
<!-- nist-index-ignore-end -->
<div data-elastic-exclude>
<!-- nist-index-ignore-start -->
<div class="nist-print-header" style="display:none;">
<p class="nist-print-header__url">https://www.nist.gov/ncnr/chrns-vsans-very-small-angle-neutron-scattering</p>
<img class="nist-print-header__logo" width="289" height="38" src="/libraries/nist-component-library/dist/img/logo/nist_logo_sidestack.svg" alt="National Institute of Standards and Technology" />
</div>
<div class="usa-overlay"></div>
<header class="usa-header nist-header--www nist-header--minimal" role="banner">
<div class="usa-navbar">
<div class="usa-logo flex-fill">
<a href="/" title="National Institute of Standards and Technology" aria-label="Home">
<img src="/libraries/nist-component-library/dist/img/logo/logo.svg" alt="National Institute of Standards and Technology" width="300px" height="80px" />
</a>
</div>
<div class="usa-header__right grid-row flex-auto">
<div class="grid-col-fill nist-header__search-group">
<form class="usa-search usa-search--small"
accept-charset="UTF-8"
action="/search"
id="search_form"
method="get">
<div role="search">
<label class="usa-sr-only" for="search-form">Search NIST</label>
<input class="usa-input" id="search-form" type="search" name="s" placeholder="Search NIST" required="" maxlength="128">
<button class="usa-button" type="submit"><img src="/libraries/nist-component-library/dist/img/usa-icons-bg/search--white.svg" class="usa-search__submit-icon" alt="Search"></button>
</div>
</form>
</div>
<div class="grid-col-auto padding-left-1">
<button class="usa-menu-btn">Menu</button>
</div>
</div>
</div>
<nav aria-label="Primary navigation" class="usa-nav">
<div class="usa-nav__inner">
<button class="usa-nav__close">Close</button>
<ul class="usa-nav__primary usa-accordion">
<li class="usa-nav__primary-item">
<a class="usa-nav__link" href="/publications">Publications</a>
</li>
<li class="usa-nav__primary-item">
<button class="usa-accordion__button usa-nav__link" aria-expanded="false" aria-controls="primary_menu-2"><span>What We Do</span></button>
<div id="primary_menu-2" class="usa-nav__submenu usa-megamenu">
<div class="grid-row">
<div class="tablet:grid-col-fill"><ul class="usa-nav__submenu-list">
<li class="usa-nav__submenu-item">
<a href="/topics" class="usa-nav__link">All Topics</a>
</li>
<li class="usa-nav__submenu-item">
<a href="/advanced-communications" class="usa-nav__link">Advanced communications</a>
</li>
<li class="usa-nav__submenu-item">
<a href="/artificial-intelligence" class="usa-nav__link">Artificial intelligence</a>
</li>
<li class="usa-nav__submenu-item">
<a href="/bioscience" class="usa-nav__link">Bioscience</a>
</li>
<li class="usa-nav__submenu-item">
<a href="/buildings-construction" class="usa-nav__link">Buildings and construction</a>
</li>
<li class="usa-nav__submenu-item">
<a href="/chemistry" class="usa-nav__link">Chemistry</a>
</li>
<li class="usa-nav__submenu-item">
<a href="/cybersecurity" class="usa-nav__link">Cybersecurity</a>
</li>
<li class="usa-nav__submenu-item">
<a href="/electronics" class="usa-nav__link">Electronics</a>
</li>
<li class="usa-nav__submenu-item">
<a href="/energy" class="usa-nav__link">Energy</a>
</li>
</ul></div><div class="column-break tablet:grid-col-fill"><ul class="usa-nav__submenu-list">
<li class="usa-nav__submenu-item">
<a href="/environment" class="usa-nav__link">Environment</a>
</li>
<li class="usa-nav__submenu-item">
<a href="/fire" class="usa-nav__link">Fire</a>
</li>
<li class="usa-nav__submenu-item">
<a href="/forensic-science" class="usa-nav__link">Forensic science</a>
</li>
<li class="usa-nav__submenu-item">
<a href="/health" class="usa-nav__link">Health</a>
</li>
<li class="usa-nav__submenu-item">
<a href="/information-technology" class="usa-nav__link">Information technology</a>
</li>
<li class="usa-nav__submenu-item">
<a href="/infrastructure" class="usa-nav__link">Infrastructure</a>
</li>
<li class="usa-nav__submenu-item">
<a href="/manufacturing" class="usa-nav__link">Manufacturing</a>
</li>
<li class="usa-nav__submenu-item">
<a href="/materials" class="usa-nav__link">Materials</a>
</li>
<li class="usa-nav__submenu-item">
<a href="/mathematics-statistics" class="usa-nav__link">Mathematics and statistics</a>
</li>
</ul></div><div class="column-break tablet:grid-col-fill"><ul class="usa-nav__submenu-list">
<li class="usa-nav__submenu-item">
<a href="/metrology" class="usa-nav__link">Metrology</a>
</li>
<li class="usa-nav__submenu-item">
<a href="/nanotechnology" class="usa-nav__link">Nanotechnology</a>
</li>
<li class="usa-nav__submenu-item">
<a href="/neutron-research" class="usa-nav__link">Neutron research</a>
</li>
<li class="usa-nav__submenu-item">
<a href="/performance-excellence" class="usa-nav__link">Performance excellence</a>
</li>
<li class="usa-nav__submenu-item">
<a href="/physics" class="usa-nav__link">Physics</a>
</li>
<li class="usa-nav__submenu-item">
<a href="/public-safety" class="usa-nav__link">Public safety</a>
</li>
<li class="usa-nav__submenu-item">
<a href="/quantum-information-science" class="usa-nav__link">Quantum information science</a>
</li>
<li class="usa-nav__submenu-item">
<a href="/resilience" class="usa-nav__link">Resilience</a>
</li>
<li class="usa-nav__submenu-item">
<a href="/standards" class="usa-nav__link">Standards</a>
</li>
<li class="usa-nav__submenu-item">
<a href="/transportation" class="usa-nav__link">Transportation</a>
</li>
</ul>
</div>
</div>
</div>
</li>
<li class="usa-nav__primary-item">
<button class="usa-accordion__button usa-nav__link" aria-expanded="false" aria-controls="primary_menu-3"><span>Labs &amp; Major Programs</span></button>
<div id="primary_menu-3" class="usa-nav__submenu usa-megamenu">
<div class="grid-row">
<div class="tablet:grid-col-fill"><ul class="usa-nav__submenu-list">
<li class="usa-nav__submenu-item">
<a href="/adlp" class="usa-nav__link">Assoc Director of Laboratory Programs</a>
</li>
<li class="usa-nav__submenu-item">
<a href="/laboratories" class="usa-nav__link">Laboratories</a>
<ul class="usa-nav__submenu-list">
<li>
<a href="/ctl" class="usa-nav__link">Communications Technology Laboratory</a>
</li>
<li>
<a href="/el" class="usa-nav__link">Engineering Laboratory</a>
</li>
<li>
<a href="/itl" class="usa-nav__link">Information Technology Laboratory</a>
</li>
<li>
<a href="/mml" class="usa-nav__link">Material Measurement Laboratory</a>
</li>
<li>
<a href="/pml" class="usa-nav__link">Physical Measurement Laboratory</a>
</li>
</ul>
</li>
</ul></div><div class="column-break tablet:grid-col-fill"><ul class="usa-nav__submenu-list">
<li class="usa-nav__submenu-item">
<a href="/user-facilities" class="usa-nav__link">User Facilities</a>
<ul class="usa-nav__submenu-list">
<li>
<a href="/ncnr" class="usa-nav__link">NIST Center for Neutron Research</a>
</li>
<li>
<a href="/cnst" class="usa-nav__link">CNST NanoFab</a>
</li>
</ul>
</li>
<li class="usa-nav__submenu-item">
<a href="/labs-major-programs/research-test-beds" class="usa-nav__link">Research Test Beds</a>
</li>
<li class="usa-nav__submenu-item">
<a href="/laboratories/projects-programs" class="usa-nav__link">Research Projects</a>
</li>
<li class="usa-nav__submenu-item">
<a href="/laboratories/tools-instruments" class="usa-nav__link">Tools &amp; Instruments</a>
</li>
</ul></div><div class="column-break tablet:grid-col-fill"><ul class="usa-nav__submenu-list">
<li class="usa-nav__submenu-item">
<a href="/major-programs" class="usa-nav__link">Major Programs</a>
<ul class="usa-nav__submenu-list">
<li>
<a href="/baldrige" class="usa-nav__link">Baldrige Performance Excellence Program</a>
</li>
<li>
<a href="/chips" class="usa-nav__link">CHIPS for America Initiative</a>
</li>
<li>
<a href="/mep" class="usa-nav__link">Manufacturing Extension Partnership (MEP)</a>
</li>
<li>
<a href="/oam" class="usa-nav__link">Office of Advanced Manufacturing</a>
</li>
<li>
<a href="/spo" class="usa-nav__link">Special Programs Office</a>
</li>
<li>
<a href="/tpo" class="usa-nav__link">Technology Partnerships Office</a>
</li>
</ul>
</li>
</ul>
</div>
</div>
</div>
</li>
<li class="usa-nav__primary-item">
<button class="usa-accordion__button usa-nav__link" aria-expanded="false" aria-controls="primary_menu-4"><span>Services &amp; Resources</span></button>
<div id="primary_menu-4" class="usa-nav__submenu usa-megamenu">
<div class="grid-row">
<div class="tablet:grid-col-fill"><ul class="usa-nav__submenu-list">
<li class="usa-nav__submenu-item">
<a href="/content/standards-measurements" class="usa-nav__link">Standards and Measurements</a>
<ul class="usa-nav__submenu-list">
<li>
<a href="/calibrations" class="usa-nav__link">Calibration Services</a>
</li>
<li>
<a href="/nvlap" class="usa-nav__link">Laboratory Accreditation (NVLAP)</a>
</li>
<li>
<a href="/nist-quality-system" class="usa-nav__link">Quality System</a>
</li>
<li>
<a href="/srm" class="usa-nav__link">Standard Reference Materials (SRMs)</a>
</li>
<li>
<a href="/sri" class="usa-nav__link">Standard Reference Instruments (SRIs)</a>
</li>
<li>
<a href="/standardsgov" class="usa-nav__link">Standards.gov</a>
</li>
<li>
<a href="/pml/time-and-frequency-division/time-services" class="usa-nav__link">Time Services</a>
</li>
<li>
<a href="/pml/owm" class="usa-nav__link">Office of Weights and Measures</a>
</li>
</ul>
</li>
</ul></div><div class="column-break tablet:grid-col-fill"><ul class="usa-nav__submenu-list">
<li class="usa-nav__submenu-item">
<a href="/services-resources/software" class="usa-nav__link">Software</a>
</li>
<li class="usa-nav__submenu-item">
<a href="/data" class="usa-nav__link">Data</a>
<ul class="usa-nav__submenu-list">
<li>
<a href="https://webbook.nist.gov/chemistry/" class="usa-nav__link">Chemistry WebBook</a>
</li>
<li>
<a href="https://nvd.nist.gov/" class="usa-nav__link">National Vulnerability Database</a>
</li>
<li>
<a href="/pml/productsservices/physical-reference-data" class="usa-nav__link">Physical Reference Data</a>
</li>
<li>
<a href="/srd" class="usa-nav__link">Standard Reference Data (SRD)</a>
</li>
</ul>
</li>
<li class="usa-nav__submenu-item">
<a href="https://shop.nist.gov/" class="usa-nav__link">Storefront</a>
</li>
<li class="usa-nav__submenu-item">
<a href="/tpo" class="usa-nav__link">License &amp; Patents</a>
</li>
</ul></div><div class="column-break tablet:grid-col-fill"><ul class="usa-nav__submenu-list">
<li class="usa-nav__submenu-item">
<a href="https://csrc.nist.gov/" class="usa-nav__link">Computer Security Resource Center (CSRC)</a>
</li>
<li class="usa-nav__submenu-item">
<a href="/nist-research-library" class="usa-nav__link">NIST Research Library</a>
</li>
</ul>
</div>
</div>
</div>
</li>
<li class="usa-nav__primary-item">
<button class="usa-accordion__button usa-nav__link" aria-expanded="false" aria-controls="primary_menu-5"><span>News &amp; Events</span></button>
<div id="primary_menu-5" class="usa-nav__submenu usa-megamenu">
<div class="grid-row">
<div class="tablet:grid-col-fill"><ul class="usa-nav__submenu-list">
<li class="usa-nav__submenu-item">
<a href="/news-events/news" class="usa-nav__link">News</a>
</li>
<li class="usa-nav__submenu-item">
<a href="/news-events/events" class="usa-nav__link">Events</a>
</li>
<li class="usa-nav__submenu-item">
<a href="/blogs" class="usa-nav__link">Blogs</a>
</li>
<li class="usa-nav__submenu-item">
<a href="/feature-stories" class="usa-nav__link">Feature Stories</a>
</li>
<li class="usa-nav__submenu-item">
<a href="/awards" class="usa-nav__link">Awards</a>
</li>
</ul></div><div class="column-break tablet:grid-col-fill"><ul class="usa-nav__submenu-list">
<li class="usa-nav__submenu-item">
<a href="/video-gallery" class="usa-nav__link">Video Gallery</a>
</li>
<li class="usa-nav__submenu-item">
<a href="/image-gallery" class="usa-nav__link">Image Gallery</a>
</li>
<li class="usa-nav__submenu-item">
<a href="/pao/media-contacts" class="usa-nav__link">Media Contacts</a>
</li>
</ul>
</div>
</div>
</div>
</li>
<li class="usa-nav__primary-item">
<button class="usa-accordion__button usa-nav__link" aria-expanded="false" aria-controls="primary_menu-6"><span>About NIST</span></button>
<div id="primary_menu-6" class="usa-nav__submenu usa-megamenu">
<div class="grid-row">
<div class="tablet:grid-col-fill"><ul class="usa-nav__submenu-list">
<li class="usa-nav__submenu-item">
<a href="/about-nist" class="usa-nav__link">About Us</a>
<ul class="usa-nav__submenu-list">
<li>
<a href="/director/leadership" class="usa-nav__link">Leadership</a>
</li>
<li>
<a href="/director/nist-organization-structure" class="usa-nav__link">Organization Structure</a>
</li>
<li>
<a href="/about-nist/budget-planning" class="usa-nav__link">Budget &amp; Planning</a>
</li>
</ul>
</li>
<li class="usa-nav__submenu-item">
<a href="/about-nist/contact-us" class="usa-nav__link">Contact Us</a>
</li>
<li class="usa-nav__submenu-item">
<a href="/about-nist/visit" class="usa-nav__link">Visit</a>
</li>
<li class="usa-nav__submenu-item">
<a href="/careers" class="usa-nav__link">Careers</a>
<ul class="usa-nav__submenu-list">
<li>
<a href="/iaao/academic-affairs-office" class="usa-nav__link">Student programs</a>
</li>
</ul>
</li>
</ul></div><div class="column-break tablet:grid-col-fill"><ul class="usa-nav__submenu-list">
<li class="usa-nav__submenu-item">
<a href="/about-nist/work-nist" class="usa-nav__link">Work with NIST</a>
</li>
<li class="usa-nav__submenu-item">
<a href="/history" class="usa-nav__link">History</a>
<ul class="usa-nav__submenu-list">
<li>
<a href="http://nistdigitalarchives.contentdm.oclc.org/" class="usa-nav__link">NIST Digital Archives</a>
</li>
<li>
<a href="/nist-museum" class="usa-nav__link">NIST Museum</a>
</li>
<li>
<a href="/nist-and-nobel" class="usa-nav__link">NIST and the Nobel</a>
</li>
</ul>
</li>
<li class="usa-nav__submenu-item">
<a href="/education" class="usa-nav__link">Educational Resources</a>
</li>
</ul>
</div>
</div>
</div>
</li>
</ul>
</div>
</nav>
</header>
<!-- nist-index-ignore-end -->
</div>
<div class="grid-container">
</div>
<div
id="block-nist-www-content" class="nist-block"
>
<section
class="nist-page__content usa-section clearfix"
>
<a id="main-content" tabindex="-1"></a>
<div class="grid-container margin-top-4">
<div
class="nist-page__region nist-page__region--content-top"
>
<div
class="nist-block"
>
<h1 class="nist-page__title">CHRNS VSANS - Very Small-Angle Neutron Scattering</h1>
</div>
</div>
</div>
<div class="grid-container margin-top-4">
<div class="grid-row grid-gap-6">
<div
class="nist-page__region nist-page__region--content tablet-lg:grid-col-8"
>
<div
class="nist-block"
>
<div class="text-with-summary">
<p>&nbsp;</p>
<figure class=" align-center nist-image" role="group">
<div>
<img alt="Center for High Resolution Neutron Scattering (CHRNS)" height="123" loading="lazy" src="/sites/default/files/styles/480_x_480_limit/public/images/2017/05/12/chrns-3-wide.png?itok=rQP-koRT" typeof="foaf:Image" width="480">
</div>
<figcaption class="nist-image__caption">Maximizing access for the scientific community to transformative neutron scattering instrumentation</figcaption>
</figure>
<figure class=" align-right nist-image--lightbox nist-image" role="group">
<div data-lightbox="https://www.nist.gov/sites/default/files/styles/2800_x_2800_limit/public/images/2018/10/01/vsans-fig1.png?itok=PltEYnLq" data-media-id="465061">
<img alt="VSANS Schematic" height="393" loading="lazy" src="/sites/default/files/styles/480_x_480_limit/public/images/2018/10/01/vsans-fig1.png?itok=n53NOMgy" typeof="foaf:Image" width="366">
</div>
<figcaption class="nist-image__caption"></figcaption>
</figure>
<p>Sponsored by the National Science Foundation as part of the&nbsp;<a href="https://www.nist.gov/ncnr/chrns">Center for High Resolution Neutron Scattering</a>&nbsp;(CHRNS), this brand new 45 meter long Small-Angle Neutron Scattering (VSANS) instrument on neutron guide NG3 was put into operation in 2017.</p>
<p>The instrument has a number of design features to make it more versatile than the 30 m instruments:</p>
<ul>
<li>High Resolution detector</li>
<li>Converging beam collimation</li>
<li>Multiple detector arrays</li>
<li>Narrow or broad wavelength resolution</li>
</ul>
<p>For more information see&nbsp;<a href="https://ncnr.nist.gov/equipment/msnew/ncnr/vsans-design-features.html">Design Features</a></p>
</div>
</div>
<div
class="nist-block"
>
<h2
class="nist-block__title"
>Specifications/Capabilities</h2>
<div class="text-long"><table align="left">
<tbody>
<tr>
<td align="left"><strong>Q-range</strong></td>
<td align="left" colspan="3">0.002 nm<sup>-1</sup>&nbsp;to 10 nm<sup>-1</sup></td>
</tr>
<tr>
<td align="left"><strong>Size Regime</strong></td>
<td align="left" colspan="3">1 nm to 2,000 nm</td>
</tr>
<tr>
<td align="left"><strong>Source</strong></td>
<td align="left" colspan="3">Neutron Guide (NG-3), cross-section: 60 mm x 150 mm</td>
</tr>
<tr>
<td align="left">
<p><strong>Power Outlets</strong></p>
</td>
<td align="left" colspan="3">
<p>220V, 30A, 1-phase - Qty. 3</p>
<p>208V, 30A, 3-phase - Qty. 2</p>
<p>208V, 60A, 3-phase - Qty. 2</p>
<p>110V, 30A, 1-phase - Numerous UPS and non-UPS</p>
</td>
</tr>
</tbody>
</table>
<h3><a href="https://ncnr.nist.gov/equipment/msnew/ncnr/vsans-monochromator.html">Monochromator</a></h3>
<table align="left">
<tbody>
<tr>
<td align="left">&nbsp;</td>
<td align="center">Velocity selector</td>
<td align="center">Mirror</td>
<td align="center">HOPG</td>
</tr>
<tr>
<td align="left"><strong>Wavelength Range</strong></td>
<td align="center">4.5 Å to 12 Å</td>
<td align="center">5.3 Å</td>
<td align="center">4 Å to 6 Å</td>
</tr>
<tr>
<td align="left"><strong>Wavelength<br>
Resolution (fwhm)</strong></td>
<td align="center">12 %</td>
<td align="center">~ 40%</td>
<td align="center">1%</td>
</tr>
</tbody>
</table>
<h3><a href="https://ncnr.nist.gov/equipment/msnew/ncnr/vsans-collimation.html">Collimation</a></h3>
<table align="left">
<tbody>
<tr>
<td align="left"><strong>Source-to-Sample<br>
Distance</strong></td>
<td align="left" colspan="3">4 m to 22 m in 2 m steps</td>
</tr>
<tr>
<td align="left"><strong>Collimation Types</strong></td>
<td align="left" colspan="3">Circular Pinhole, Multiple converging beams or Narrow slits</td>
</tr>
<tr>
<td align="left"><strong>Sample Size</strong></td>
<td align="left" colspan="3">5 mm diameter to 36 mm x 72 mm</td>
</tr>
<tr>
<td align="left" rowspan="2"><strong>Sample-to-Detector Distance</strong></td>
<td align="center">Front</td>
<td align="center">Middle</td>
<td align="center">Rear Carriage</td>
</tr>
<tr>
<td align="center">0.6 m to 10 m</td>
<td align="center">2.5 m to 18 m</td>
<td align="center">10 m to 22 m</td>
</tr>
</tbody>
</table>
<h3><a href="https://ncnr.nist.gov/equipment/msnew/ncnr/vsans-detectors.html">Detectors</a></h3>
<table align="left">
<tbody>
<tr>
<td align="left">&nbsp;</td>
<td align="center">Front</td>
<td align="center">Middle</td>
<td align="center">Rear Carriage</td>
</tr>
<tr>
<td align="left"><strong>Type</strong></td>
<td align="center">He(3) tubes</td>
<td align="center">He(3) tubes</td>
<td align="center">Scintillator + CCD</td>
</tr>
<tr>
<td align="left"><strong>Resolution</strong></td>
<td align="center">8 mm</td>
<td align="center">8 mm</td>
<td align="center">0.2 mm</td>
</tr>
<tr>
<td align="left"><strong>#Panels</strong></td>
<td align="center">4</td>
<td align="center">4</td>
<td align="center">1</td>
</tr>
<tr>
<td align="left"><strong>Size</strong></td>
<td align="center" colspan="2">2 x 380 mm wide x 1000 mm tall<br>
2 x 500 mm wide x 380 mm tall</td>
<td align="center">220 mm wide<br>
500 mm ta</td>
</tr>
</tbody>
</table></div>
</div>
</div>
<aside class="nist-page__region nist-page__region--sidebar-second tablet-lg:grid-col-4">
<div>
<div
class="views-element-container nist-block nist-block--org"
>
<h2
class="nist-block__title"
>NCNR Affiliations</h2>
<div><div class="js-view-dom-id-8b7e432f8bcd730ba38ee25504e61bcf9572d31c78a7d427dacde0764fc2d40f">
<div class="nist-related-orgs"><div class="term-tree-list">
<ul class="term"><li><a href="/ncnr-affiliations/nist" class="unselected" hreflang="en">NIST</a></li><li><ul class="term"><li><a href="/ncnr-affiliations/ncnr-affiliations" class="unselected" hreflang="en">NCNR Affiliations</a></li><li><ul class="term"><li><a href="/ncnr-affiliations/nist/ncnr-affiliations/nist-center-neutron-research" class="selected" hreflang="en">NIST Center for Neutron Research</a></li><li><a href="/ncnr-affiliations/nist/ncnr-affiliations/center-high-resolution-neutron-scattering" class="selected" hreflang="en">Center for High Resolution Neutron Scattering</a></li></ul></li></ul></li></ul>
</div>
</div>
<div class="nist-related-orgs"></div>
</div>
</div>
</div>
<div
class="nist-block nist-block--contact"
>
<h2
class="nist-block__title"
>Instrument Scientists</h2>
<div class="nist-contact">
<h3 class="nist-contact__heading">Scientific Contacts</h3>
<ul class="nist-contact__items">
<li about="/people/yun-liu" class="nist-contact__item">
<div class="nist-contact__name"><a href="/people/yun-liu" title="View staff profile page">Yun Liu</a></div>
<div>
<a href="mailto:yun.liu@nist.gov">yun.liu@nist.gov</a>
</div>
<div>
(301) 975-6235
</div>
</li>
<li about="/people/elizabeth-kelley" class="nist-contact__item">
<div class="nist-contact__name"><a href="/people/elizabeth-kelley" title="View staff profile page">Elizabeth Kelley</a></div>
<div>
<a href="mailto:elizabeth.kelley@nist.gov">elizabeth.kelley@nist.gov</a>
</div>
<div>
(301) 975-8584
</div>
</li>
<li about="/people/jonathan-gaudet" class="nist-contact__item">
<div class="nist-contact__name"><a href="/people/jonathan-gaudet" title="View staff profile page">Jonathan Gaudet</a></div>
<div>
<a href="mailto:jonathan.gaudet@nist.gov">jonathan.gaudet@nist.gov</a>
</div>
<div>
(301) 975-5010
</div>
</li>
<li about="/people/ryan-murphy" class="nist-contact__item">
<div class="nist-contact__name"><a href="/people/ryan-murphy" title="View staff profile page">Ryan Murphy</a></div>
<div>
<a href="mailto:ryan.murphy@nist.gov">ryan.murphy@nist.gov</a>
</div>
<div>
(301) 975-8544
</div>
</li>
</ul>
</div>
<div class="nist-contact">
<h3 class="nist-contact__heading">Instrument Responsible</h3>
<ul class="nist-contact__items">
<li about="/people/cedric-gagnon" class="nist-contact__item">
<div class="nist-contact__name"><a href="/people/cedric-gagnon" title="View staff profile page">Cedric Gagnon</a></div>
<div>
<a href="mailto:cedric.gagnon@nist.gov">cedric.gagnon@nist.gov</a>
</div>
<div>
(301) 975-2020
</div>
</li>
</ul>
</div>
</div>
<div
class="nist-block"
>
<div class="nist-field nist-field--label-hidden nist-field--link-list nist-field__items">
<div class="nist-field-item nist-date"><a href="https://www.ncnr.nist.gov/instrumentSchedule/ims_calendar.html?instruments=vsans">Current Schedule</a></div>
<div class="nist-field-item nist-date"><a href="https://www.nist.gov/ncnr/ncnr-operations-schedule">NCNR Facility Schedule</a></div>
</div>
</div>
<div
class="nist-block"
>
<div>
<a class="usa-button usa-button--primary-lighter" href="https://ncnr.nist.gov/ncnrdata/view/vsans/vsans_viewer.html">Live data</a>
</div>
</div>
<div
class="nist-block"
>
<h2
class="nist-block__title"
>Instrument Details</h2>
<div class="link-list">
<ul>
<li>
<a href="https://ncnr.nist.gov/equipment/msnew/ncnr/vsans-design-features.html">Design Features</a>
</li>
<li>
<a href="https://ncnr.nist.gov/equipment/msnew/ncnr/vsans-monochromator.html">Monochromator</a>
</li>
<li>
<a href="https://ncnr.nist.gov/equipment/msnew/ncnr/vsans-collimation.html">Collimation</a>
</li>
<li>
<a href="https://ncnr.nist.gov/equipment/msnew/ncnr/vsans-detectors.html">Detectors</a>
</li>
</ul>
</div>
</div>
<div
class="nist-block"
>
<h2
class="nist-block__title"
>Experiment Planning</h2>
<div class="link-list">
<ul>
<li>
<a href="https://www.ncnr.nist.gov/resources/activation/">Activation and SLD Calculator</a>
</li>
<li>
<a href="https://www.nist.gov/ncnr/obtaining-instrument-time">Obtaining Beam Time</a>
</li>
<li>
<a href="http://nicedata.ncnr.nist.gov/niceweb/nicejs/VCALC/">VSANS Calculator (internal link)</a>
</li>
<li>
<a href="/ncnr/sample-environment/sans-equipment">SANS Sample Environment and Equipment</a>
</li>
<li>
<a href="https://dx.doi.org/10.18434/T4201B?urlappend=vsans/">vSANS Raw Data</a>
</li>
</ul>
</div>
</div>
<div
class="nist-block"
>
<h2
class="nist-block__title"
>Research Program</h2>
<div class="nist-field nist-field--label-hidden nist-field--link-list link">
<div class="nist-field__items">
<div class="nist-field__item"><a href="https://www.ncnr.nist.gov/publications/VSANS_pubs.html">VSANS Publications</a></div>
<div class="nist-field__item"><a href="https://www.nist.gov/ncnr/chrns">CHRNS</a></div>
<div class="nist-field__item"><a href="https://www.nist.gov/ncnr/neutron-instruments/small-angle-neutron-scattering-sans">Small Angle Neutron Research</a></div>
</div>
</div>
</div>
<div
class="nist-block"
>
<h2
class="nist-block__title"
>Data Analysis</h2>
<div class="link-list">
<ul>
<li>
<a href="/ncnr/data-reduction-analysis/sans-software">Data Reduction Using IGOR</a>
</li>
<li>
<a href="http://sasview.org/">Data Analysis Using SasView</a>
</li>
<li>
<a href="https://ncnr.nist.gov/ncnrdata/view/nexus-hdf-viewer.html">Raw Data Browser</a>
</li>
<li>
<a href="https://ncnr.nist.gov/ncnrdata/view/vsansbrowser.html">Data Visualization Tool</a>
</li>
</ul>
</div>
</div>
<div
class="nist-block"
>
<div>
<a class="usa-button usa-button--primary-lighter" href="https://www.nist.gov/ncnr/publishing-your-results">Publishing Results</a>
</div>
</div>
<div
class="nist-block"
>
<div>
<a class="usa-button usa-button--primary-lighter" href="https://www.nist.gov/ncnr/neutron-instruments">Other Instruments</a>
</div>
</div>
</div>
</aside>
</div>
</div>
<div class="grid-container">
<div
class="nist-page__region nist-page__region--content-bottom"
>
<div
class="nist-block"
>
<div class="text-italic font-sans-2xs">
Created October 1, 2018, Updated June 20, 2023
</div>
</div>
</div>
</div>
</section>
</div>
<div data-elastic-exclude>
<!-- nist-index-ignore-start -->
<footer class="nist-footer padding-bottom-4">
<div class="grid-container nist-footer__info">
<div class="grid-row">
<div class="tablet:grid-col-6">
<div class="nist-footer__logo">
<a href="/" title="National Institute of Standards and Technology" rel="home">
<img class="nist-footer__logo-img" src="/libraries/nist-component-library/dist/img/logo/NIST-Logo-Brand-White.svg" alt="National Institute of Standards and Technology logo" width="300px" height="42px" />
</a>
</div>
<div class="nist-footer__contact">
<h3 class="nist-footer__contact-heading">HEADQUARTERS</h3>
<address>
100 Bureau Drive<br>
Gaithersburg, MD 20899<br>
<a href="tel:301-975-2000">301-975-2000</a>
</address>
<p>
<a href="mailto:do-webmaster@nist.gov">Webmaster</a> | <a href="https://www.nist.gov/about-nist/contact-us">Contact Us</a> | <a href="https://www.nist.gov/visit">Our Other Offices</a>
</p>
</div>
</div>
<div class="tablet:grid-col-6">
<div class="nist-footer__social-links">
<a class="nist-social nist-social--x-white" href=" https://x.com/NIST">
<span>X.com</span>
</a>
<a class="nist-social nist-social--facebook-white" href=" https://www.facebook.com/NIST">
<span>Facebook</span>
</a>
<a class="nist-social nist-social--linkedin-white" href=" https://www.linkedin.com/company/nist">
<span>LinkedIn</span>
</a>
<a class="nist-social nist-social--instagram-white" href=" https://www.instagram.com/nist/">
<span>Instagram</span>
</a>
<a class="nist-social nist-social--youtube-white" href=" https://www.youtube.com/NIST">
<span>YouTube</span>
</a>
<a class="nist-social nist-social--giphy-white" href=" https://giphy.com/nist">
<span>Giphy</span>
</a>
<a class="nist-social nist-social--rss-white" href=" https://www.nist.gov/news-events/nist-rss-feeds">
<span>RSS Feed</span>
</a>
<a class="nist-social nist-social--envelope-white" href=" https://public.govdelivery.com/accounts/USNIST/subscriber/new">
<span>Mailing List</span>
</a>
</div>
<div class="nist-footer__feedback">
How are we doing? <a class="usa-button" rel="nofollow" href="/form/nist-gov-feedback?destination=/ncnr/chrns-vsans-very-small-angle-neutron-scattering" title="Provide feedback">Feedback</a>
</div>
</div>
</div>
</div>
<div class="grid-container">
<div class="nist-footer__nav" role="navigation">
<ul>
<li class="nist-footer__menu-item">
<a href="https://www.nist.gov/privacy-policy">Site Privacy</a>
</li>
<li class="nist-footer__menu-item">
<a href="https://www.nist.gov/oism/accessibility">Accessibility</a>
</li>
<li class="nist-footer__menu-item">
<a href="https://www.nist.gov/privacy">Privacy Program</a>
</li>
<li class="nist-footer__menu-item">
<a href="https://www.nist.gov/oism/copyrights">Copyrights</a>
</li>
<li class="nist-footer__menu-item">
<a href="https://www.commerce.gov/vulnerability-disclosure-policy">Vulnerability Disclosure</a>
</li>
<li class="nist-footer__menu-item">
<a href="https://www.nist.gov/no-fear-act-policy">No Fear Act Policy</a>
</li>
<li class="nist-footer__menu-item">
<a href="https://www.nist.gov/office-director/freedom-information-act">FOIA</a>
</li>
<li class="nist-footer__menu-item">
<a href="https://www.nist.gov/environmental-policy-statement">Environmental Policy</a>
</li>
<li class="nist-footer__menu-item">
<a href="https://www.nist.gov/summary-report-scientific-integrity">Scientific Integrity</a>
</li>
<li class="nist-footer__menu-item">
<a href="https://www.nist.gov/nist-information-quality-standards">Information Quality Standards</a>
</li>
<li class="nist-footer__menu-item">
<a href="https://www.commerce.gov/">Commerce.gov</a>
</li>
<li class="nist-footer__menu-item">
<a href="http://www.science.gov/">Science.gov</a>
</li>
<li class="nist-footer__menu-item">
<a href="http://www.usa.gov/">USA.gov</a>
</li>
<li class="nist-footer__menu-item">
<a href="https://vote.gov/">Vote.gov</a>
</li>
</ul>
</div>
</div>
</footer>
<!-- nist-index-ignore-end -->
</div>
</div>
<script type="application/json" data-drupal-selector="drupal-settings-json">{"path":{"baseUrl":"\/","pathPrefix":"","currentPath":"node\/1524241","currentPathIsAdmin":false,"isFront":false,"currentLanguage":"en"},"pluralDelimiter":"\u0003","suppressDeprecationErrors":true,"back_to_top":{"back_to_top_button_trigger":100,"back_to_top_speed":1200,"back_to_top_prevent_on_mobile":false,"back_to_top_prevent_in_admin":true,"back_to_top_button_type":"image","back_to_top_button_text":"Back to top"},"google_analytics":{"account":"G-HEQ0YF2VYL","trackOutbound":true,"trackMailto":true,"trackTel":true,"trackDownload":true,"trackDownloadExtensions":"7z|aac|arc|arj|asf|asx|avi|bin|bsh|c|csv|doc(x|m)?|dot(x|m)?|dw(fx|g|gd)|dxf|eps|epub|exe|f(90)|flv|gif|gz|gzip|hqx|jar|jpe?g|js|m1v|mp(2|3|4|e?g)|mobi|mov(ie)?|msi|msp|pdf|phps|pl|png|ppt(x|m)?|pot(x|m)?|pps(x|m)?|ppam|sld(x|m)?|thmx|qtm?|ra(m|r)?|rfa|rtf|rvt|sch|sea|sit|swf|tar|tgz|tif|txt|txz|wav|wma|wmv|wpd|wrl|xls(x|m|b)?|xlt(x|m)|xlam|xml|xsd|z|zip"},"nist_search":{"clickTracking":"search-report-click","isDebug":false,"clickTrackEnabled":true,"message":"NIST Search in debug mode. Check the browsers network inspector for Click Track reporting results..."},"data":{"extlink":{"extTarget":false,"extTargetNoOverride":false,"extNofollow":false,"extNoreferrer":false,"extFollowNoOverride":false,"extClass":"ext","extLabel":"(link is external)","extImgClass":false,"extSubdomains":true,"extExclude":"\\.gov\\\/|\\.mil\\\/|\\manufacturingusa\\.com\\\/","extInclude":"","extCssExclude":".ck-editor, .nist-video-thumbnail__lightbox-trigger, a.nist-icon--mail-blue","extCssExplicit":"","extAlert":true,"extAlertText":"Thank you for visiting NIST. We hope your visit was informative. We have provided a link to this site because it has information that may be of interest to our users. NIST does not necessarily endorse the views expressed or the facts presented on this site. Further, NIST does not endorse any commercial products that may be advertised or available on this site. Click OK to be directed to your link.","mailtoClass":"0","mailtoLabel":"(link sends email)","extUseFontAwesome":false,"extIconPlacement":"after","extFaLinkClasses":"fa fa-external-link","extFaMailtoClasses":"fa fa-envelope-o","whitelistedDomains":[]}},"user":{"uid":0,"permissionsHash":"bd6a443844dbe99b4e6942f3b1397526e760137efd2b1ee6b2d588fc414dff20"}}</script>
<script src="/sites/default/files/js/js_jDaFaXhHm6gPUKstNYX9eIyoQXghVs3g7rbR0QoqpYY.js?scope=footer&amp;delta=0&amp;language=en&amp;theme=nist_www&amp;include=eJxdjdsOwjAIhl9I5ZEaurIOR8vSotW3tzsYzRIu4OM_eBxmZ9pnAf_b3b1eomoUcphR3sZDhTO4ZK7mRu4saMuiGJyVHsI5QsT9XdmI01L0SXAGa8vGbKJEvVfFY3FJAwSu6HuwcJ43DURRj3I9LDARBirf07XW_hT0stUIoTwWlNtx7saEMfPIwwflMGLc"></script>
<script src="https://siteimproveanalytics.com/js/siteanalyze_6017546.js" async></script>
<script src="/sites/default/files/js/js_HY1Ms3yOfuqQSMTBfmGvZOFPBXfCpnERuw4Zs8pWhy4.js?scope=footer&amp;delta=2&amp;language=en&amp;theme=nist_www&amp;include=eJxdjdsOwjAIhl9I5ZEaurIOR8vSotW3tzsYzRIu4OM_eBxmZ9pnAf_b3b1eomoUcphR3sZDhTO4ZK7mRu4saMuiGJyVHsI5QsT9XdmI01L0SXAGa8vGbKJEvVfFY3FJAwSu6HuwcJ43DURRj3I9LDARBirf07XW_hT0stUIoTwWlNtx7saEMfPIwwflMGLc"></script>
<script type="text/javascript">window.NREUM||(NREUM={});NREUM.info={"beacon":"bam.nr-data.net","licenseKey":"37b7ccb661","applicationID":"1089704227","transactionName":"YFxUN0sADEdYVkBaClkWdwBNCA1aFkVVVABoWlcAUQQ=","queueTime":4,"applicationTime":36,"atts":"TBtXQQMaH0k=","errorBeacon":"bam.nr-data.net","agent":""}</script></body>
</html>
Reference in a new issue Copy permalink