{"id":2423,"date":"2025-09-01T21:10:00","date_gmt":"2025-09-01T13:10:00","guid":{"rendered":"http:\/\/web.tdli.sjtu.edu.cn\/kimsiang84\/?p=2423"},"modified":"2025-11-20T21:30:57","modified_gmt":"2025-11-20T13:30:57","slug":"cosmic-ray-muography-system-cms-now-online-and-begins-first-muon-radiography-measurments-at-tdli","status":"publish","type":"post","link":"https:\/\/web.tdli.sjtu.edu.cn\/kimsiang84\/2025\/09\/01\/cosmic-ray-muography-system-cms-now-online-and-begins-first-muon-radiography-measurments-at-tdli\/","title":{"rendered":"Cosmic-ray Muography System (CMS) Now Online and Begins First Muon Radiography Measurments at TDLI"},"content":{"rendered":"\n<p>The TDLI Muon Physics group developed the Cosmic-ray Muography System (CMS), which has successfully gone online and started data collection in radiography mode. The system features three tracking layers, each constructed using 1.5 cm-wide triangular scintillator bars read out by SiPMs across an active detection area of approximately 50 cm \u00d7 50 cm. Integrated with CAEN\u2019s A5202 front-end electronics, the CMS offers a compact, modular, and high-resolution platform for muon imaging.<br>A series of commissioning measurements were conducted at three locations within TLDI\u2014two inside the Tianwen Hall and one at the B1 underground level. The preliminary results are promising: the cosmic-ray muon flux in the 90\u00b0 &lt; \u03c6 &lt; 180\u00b0 range at Location #3 (B1) is significantly lower than at the two surface-level sites. This reduction indicates muons passing through denser structural material above the underground site, demonstrating the detector\u2019s sensitivity and confirming its proper operation.<br>These initial measurements represent a significant milestone in establishing the CMS as the first functional muography instrument in Shanghai, paving the way for future structural, geological, and subsurface imaging studies around the city.<\/p>\n\n\n\n<figure class=\"wp-block-gallery columns-2 is-cropped wp-block-gallery-1 is-layout-flex wp-block-gallery-is-layout-flex\"><ul class=\"blocks-gallery-grid\"><li class=\"blocks-gallery-item\"><figure><img loading=\"lazy\" decoding=\"async\" width=\"488\" height=\"374\" src=\"http:\/\/web.tdli.sjtu.edu.cn\/kimsiang84\/wp-content\/uploads\/sites\/4\/2025\/11\/Picturecms1.png\" alt=\"\" data-id=\"2425\" data-full-url=\"http:\/\/web.tdli.sjtu.edu.cn\/kimsiang84\/wp-content\/uploads\/sites\/4\/2025\/11\/Picturecms1.png\" data-link=\"http:\/\/web.tdli.sjtu.edu.cn\/kimsiang84\/?attachment_id=2425#main\" class=\"wp-image-2425\" srcset=\"https:\/\/web.tdli.sjtu.edu.cn\/kimsiang84\/wp-content\/uploads\/sites\/4\/2025\/11\/Picturecms1.png 488w, https:\/\/web.tdli.sjtu.edu.cn\/kimsiang84\/wp-content\/uploads\/sites\/4\/2025\/11\/Picturecms1-300x230.png 300w\" sizes=\"auto, (max-width: 488px) 100vw, 488px\" \/><\/figure><\/li><li class=\"blocks-gallery-item\"><figure><img loading=\"lazy\" decoding=\"async\" width=\"964\" height=\"696\" src=\"http:\/\/web.tdli.sjtu.edu.cn\/kimsiang84\/wp-content\/uploads\/sites\/4\/2025\/11\/Picturecms3.png\" alt=\"\" data-id=\"2426\" data-full-url=\"http:\/\/web.tdli.sjtu.edu.cn\/kimsiang84\/wp-content\/uploads\/sites\/4\/2025\/11\/Picturecms3.png\" data-link=\"http:\/\/web.tdli.sjtu.edu.cn\/kimsiang84\/?attachment_id=2426#main\" class=\"wp-image-2426\" srcset=\"https:\/\/web.tdli.sjtu.edu.cn\/kimsiang84\/wp-content\/uploads\/sites\/4\/2025\/11\/Picturecms3.png 964w, https:\/\/web.tdli.sjtu.edu.cn\/kimsiang84\/wp-content\/uploads\/sites\/4\/2025\/11\/Picturecms3-300x217.png 300w, https:\/\/web.tdli.sjtu.edu.cn\/kimsiang84\/wp-content\/uploads\/sites\/4\/2025\/11\/Picturecms3-768x554.png 768w\" sizes=\"auto, (max-width: 964px) 100vw, 964px\" \/><\/figure><\/li><\/ul><\/figure>\n","protected":false},"excerpt":{"rendered":"<p>The TDLI Muon Physics group developed the Cosmic-ray Muography System (CMS), which has successfully gone online and started data collection [&hellip;]<\/p>\n","protected":false},"author":3,"featured_media":2427,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center 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