{"id":3323,"date":"2025-04-29T16:53:24","date_gmt":"2025-04-29T23:53:24","guid":{"rendered":"https:\/\/depts.washington.edu\/chemwp\/chemwpnmr\/?p=3323"},"modified":"2025-04-29T16:53:24","modified_gmt":"2025-04-29T23:53:24","slug":"update-av700-shims-are-still-settling-down","status":"publish","type":"post","link":"https:\/\/depts.washington.edu\/chemwp\/chemwpnmr\/2025\/04\/update-av700-shims-are-still-settling-down\/","title":{"rendered":"UPDATE &#8211; AV700 &#8211; SHIMS ARE STILL SETTLING DOWN"},"content":{"rendered":"<p>Dear Users<\/p>\n<p>You might have noticed that Topshim is taking an abnormally long time to converge.\u00a0 This has nothing to do with the Topshim program, but it is caused by the\u00a0 magnet&#8217;s cryogenic shims still drifting towards their ultimate equilibrium.\u00a0\u00a0 Newly charged superconducting magnets will take a while to reach a rock steady state, and it can take up to a month for the whole system to reach its ultimate stable state.<\/p>\n<p>Notwithstanding this, the instrument is very much usable, if you follow these helpful steps :<\/p>\n<ul>\n<li>Spin the sample <strong>before\u00a0<\/strong>you run\u00a0<strong>topshim.\u00a0\u00a0\u00a0<\/strong>The isolated command &#8216;topshim&#8217; will perform optimization only for the Z-axis field variation.\u00a0 The spinning sample will provide the field averaging for the XY plane.<\/li>\n<li>You can record your spectrum while the sample is spinning.<\/li>\n<li>Always turn <strong>ON<\/strong> the <strong>Autoshim<\/strong>,\u00a0 if it is not ON already. (<span style=\"text-decoration: underline;\"><em>If you need help in figuring this out, please contact one of us<\/em><\/span>)<\/li>\n<\/ul>\n<h2>NMR Facility<\/h2>\n<p>4.29.25<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Dear Users You might have noticed that Topshim is taking an abnormally long time to converge.\u00a0 This has nothing to do with the Topshim program, but it is caused by the\u00a0 magnet&#8217;s cryogenic shims still drifting towards their ultimate equilibrium.\u00a0\u00a0 Newly charged superconducting magnets will take a while to reach a rock steady state, and [&hellip;]<\/p>\n","protected":false},"author":19,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":[],"categories":[11,9],"tags":[],"_links":{"self":[{"href":"https:\/\/depts.washington.edu\/chemwp\/chemwpnmr\/wp-json\/wp\/v2\/posts\/3323"}],"collection":[{"href":"https:\/\/depts.washington.edu\/chemwp\/chemwpnmr\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/depts.washington.edu\/chemwp\/chemwpnmr\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/depts.washington.edu\/chemwp\/chemwpnmr\/wp-json\/wp\/v2\/users\/19"}],"replies":[{"embeddable":true,"href":"https:\/\/depts.washington.edu\/chemwp\/chemwpnmr\/wp-json\/wp\/v2\/comments?post=3323"}],"version-history":[{"count":1,"href":"https:\/\/depts.washington.edu\/chemwp\/chemwpnmr\/wp-json\/wp\/v2\/posts\/3323\/revisions"}],"predecessor-version":[{"id":3324,"href":"https:\/\/depts.washington.edu\/chemwp\/chemwpnmr\/wp-json\/wp\/v2\/posts\/3323\/revisions\/3324"}],"wp:attachment":[{"href":"https:\/\/depts.washington.edu\/chemwp\/chemwpnmr\/wp-json\/wp\/v2\/media?parent=3323"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/depts.washington.edu\/chemwp\/chemwpnmr\/wp-json\/wp\/v2\/categories?post=3323"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/depts.washington.edu\/chemwp\/chemwpnmr\/wp-json\/wp\/v2\/tags?post=3323"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}