{"id":2678,"date":"2023-04-14T01:44:05","date_gmt":"2023-04-13T22:44:05","guid":{"rendered":"https:\/\/baspik.com\/en\/?page_id=2678"},"modified":"2024-10-01T03:45:50","modified_gmt":"2024-10-01T00:45:50","slug":"sem-6m-1-channel-type-secondary-electron-multiplier-with-extended-dynamic-range","status":"publish","type":"page","link":"https:\/\/baspik.com\/en\/products\/detectors\/channeltron-sem\/sem-6m-1-channel-type-secondary-electron-multiplier-with-extended-dynamic-range\/","title":{"rendered":"SEM-6M-1 Channel Type Secondary Electron Multiplier with Extended Dynamic Range"},"content":{"rendered":"\n<div class=\"wp-block-columns are-vertically-aligned-center is-layout-flex wp-container-core-columns-is-layout-f56f613f wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-vertically-aligned-center is-layout-flow wp-block-column-is-layout-flow\">\n<p class=\"is-style-emphasis wp-block-paragraph\">SEM-6 channel multiplier is intended for operation in pulse counting mode, however most advanced channel SEMs shall operate as a part of mass spectrometers and in analogue mode which requires a larger output current to extend the linearity range.<\/p>\n<\/div>\n\n\n\n<div class=\"wp-block-column is-vertically-aligned-center is-layout-flow wp-block-column-is-layout-flow\">\n<figure class=\"wp-block-image aligncenter size-full\"><img decoding=\"async\" src=\"https:\/\/baspik.com\/wp-content\/uploads\/2022\/12\/veu-6.webp\" alt=\"\" class=\"wp-image-1784\"\/><\/figure>\n<\/div>\n<\/div>\n\n\n\n<p class=\"wp-block-paragraph\">The output current in channel-type SEMs maintains linearity up to a value equal to about 10% of the strip current value. This constraint is due to the fact that the strip current supplies the electrons needed to compensate for the positive charge generated after the electron avalanches leave the output of the channeltron, providing the secondary emission process. In turn, the strip current is determined by the channel resistance and increases with decreasing resistance.<br><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The task of extending the dynamic range has been solved by developing the technology of thermal hydrogen reduction of channeltron glass to a lower resistance level and optimizing the channel length-to-diameter ratio.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Specification<\/h3>\n\n\n\n<h4 class=\"wp-block-heading\">Scheme<\/h4>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"702\" height=\"281\" src=\"https:\/\/baspik.com\/en\/wp-content\/uploads\/sites\/5\/2023\/04\/secondary-electron-multipliers-sem-6m-1.webp\" alt=\"\" class=\"wp-image-2680\"\/><\/figure>\n\n\n\n<h4 class=\"wp-block-heading\">Basic performance<\/h4>\n\n\n\n<figure class=\"wp-block-table\"><table><thead><tr><th>Parameter <\/th><th>Normal value<\/th><\/tr><\/thead><tbody><tr><td>Gain at supply voltage U<sub>supply<\/sub> \u2264 2500 V<\/td><td>1\u00d710<sup>7<\/sup>,\u00a0 min<\/td><\/tr><tr><td>Gain at supply voltage U<sub>supply<\/sub> \u2264 3000 V<\/td><td>1\u00d710<sup>8<\/sup>,\u00a0 min<\/td><\/tr><tr><td>Dark count rate, counts\/s<\/td><td>1, max<\/td><\/tr><tr><td>Channel strip current at U<sub>supply<\/sub>&nbsp; = 3000 V, \u00b5A<\/td><td>90, min<\/td><\/tr><tr><td>Linear output current, \u00b5A<\/td><td>10% of strip current, min<\/td><\/tr><tr><td>Pulse height resolution at count rate of 1\u00d710<sup>3<\/sup> to 5\u00d710<sup>3<\/sup> count\/s and U<sub>supply<\/sub> corresponding to gain of 1\u00d710<sup>8<\/sup> min<\/td><td>0.9, max<\/td><\/tr><\/tbody><\/table><\/figure>\n","protected":false},"excerpt":{"rendered":"<p>SEM-6 channel multiplier is intended for operation in pulse counting mode, however most advanced channel SEMs shall operate as a part of mass spectrometers and in analogue mode which requires a larger output current to extend the linearity range. The output current in channel-type SEMs maintains linearity up to a value equal to about 10% [&hellip;]<\/p>\n","protected":false},"author":3,"featured_media":0,"parent":1480,"menu_order":2,"comment_status":"closed","ping_status":"closed","template":"","meta":{"inline_featured_image":false,"footnotes":""},"tags":[43,6,42],"class_list":["post-2678","page","type-page","status-publish","hentry","tag-channeltrons","tag-detectors","tag-secondary-electron-multipliers"],"_links":{"self":[{"href":"https:\/\/baspik.com\/en\/wp-json\/wp\/v2\/pages\/2678","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/baspik.com\/en\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/baspik.com\/en\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/baspik.com\/en\/wp-json\/wp\/v2\/users\/3"}],"replies":[{"embeddable":true,"href":"https:\/\/baspik.com\/en\/wp-json\/wp\/v2\/comments?post=2678"}],"version-history":[{"count":3,"href":"https:\/\/baspik.com\/en\/wp-json\/wp\/v2\/pages\/2678\/revisions"}],"predecessor-version":[{"id":3024,"href":"https:\/\/baspik.com\/en\/wp-json\/wp\/v2\/pages\/2678\/revisions\/3024"}],"up":[{"embeddable":true,"href":"https:\/\/baspik.com\/en\/wp-json\/wp\/v2\/pages\/1480"}],"wp:attachment":[{"href":"https:\/\/baspik.com\/en\/wp-json\/wp\/v2\/media?parent=2678"}],"wp:term":[{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/baspik.com\/en\/wp-json\/wp\/v2\/tags?post=2678"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}