{"id":577,"date":"2025-12-17T16:10:31","date_gmt":"2025-12-17T15:10:31","guid":{"rendered":"https:\/\/web.infn.it\/BULLKID-DM\/?page_id=577"},"modified":"2026-01-22T16:17:23","modified_gmt":"2026-01-22T15:17:23","slug":"bullcam","status":"publish","type":"page","link":"https:\/\/web.infn.it\/BULLKID-DM\/bullcam\/","title":{"rendered":"BULLCAm"},"content":{"rendered":"\n
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One possible approach involves the irradiation of the detectors with the gamma rays produced by the radioactive decay of an Americium 241 source. Upon its decay, it produces a low-penetrating \\(\\alpha\\) particle and an X-ray photon with a typical energy of 59.5 keV. While the penetration of the \\(\\alpha\\) particles is extremely small, hence are stopped by just a small layer of material between the source and the detector, the X-rays penetrate deeply into the silicon irradiating even the inner-most dice of the detector stack. The energy thus deposited is fixed and can be used to calibrate the response of the BULLKID-DM KIDs to a high level of precision. The development of a cryogenic system that allows for the precise control of the radioactive source is currently under development. <\/p>\n\n\n\n

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First design of the cryogenic motor for the movement of the radioactive sources inside BULLKID DM<\/strong><\/figcaption><\/figure>\n<\/div>\n\n\n\n
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Top: penetration depth of the X-Ray produced by a 241Am source in units of BULLKID-DM voxels.
Bottom: Spectral profile of the energy deposited in each voxel<\/strong><\/figcaption><\/figure>\n<\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"

One possible approach involves the irradiation of the detectors with the gamma rays produced by the radioactive decay of an Americium 241 source. Upon its decay, it produces a low-penetrating \\(\\alpha\\) particle and an X-ray photon with a typical energy of 59.5 keV. While the penetration of the \\(\\alpha\\) particles is extremely small, hence are … <\/p>\n

Leggi tutto “BULLCAm”<\/span><\/a><\/p>\n","protected":false},"author":2,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"class_list":["post-577","page","type-page","status-publish","hentry","entry"],"_links":{"self":[{"href":"https:\/\/web.infn.it\/BULLKID-DM\/wp-json\/wp\/v2\/pages\/577","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/web.infn.it\/BULLKID-DM\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/web.infn.it\/BULLKID-DM\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/web.infn.it\/BULLKID-DM\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/web.infn.it\/BULLKID-DM\/wp-json\/wp\/v2\/comments?post=577"}],"version-history":[{"count":8,"href":"https:\/\/web.infn.it\/BULLKID-DM\/wp-json\/wp\/v2\/pages\/577\/revisions"}],"predecessor-version":[{"id":614,"href":"https:\/\/web.infn.it\/BULLKID-DM\/wp-json\/wp\/v2\/pages\/577\/revisions\/614"}],"wp:attachment":[{"href":"https:\/\/web.infn.it\/BULLKID-DM\/wp-json\/wp\/v2\/media?parent=577"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}