2020
DOI: 10.1016/j.nima.2020.163862
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Operation of a double-sided CMOS pixelated detector at a high intensity e+e particle collider

Abstract: This article reports the first operation of a double-sided CMOS pixelated ladder in a collider experiment, namely in the inner tracker volume of the Belle II experiment during the Phase 2 run of the SuperKEKB collider. Design and integration of the detector system in the experiment interaction region is first described. The two modules operated almost continuously during slightly more than four months, recording data for the monitoring of the hit rate close to beams. Details of the off-line data analysis are p… Show more

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Cited by 4 publications
(9 citation statements)
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“…The Pixelated Ladder with Ultra-low Material Embedding (PLUME) detector is designed as a hit rate monitor, with a material budget low enough to minimally impact particle trajectories [10]. It is based on ultra-light double-sided ladders equipped with CMOS pixel sensors, initially developed as a generic concept for the vertex detector of the International Large Detector (ILD) [11].…”
Section: Plume Detector Systemmentioning
confidence: 99%
“…The Pixelated Ladder with Ultra-low Material Embedding (PLUME) detector is designed as a hit rate monitor, with a material budget low enough to minimally impact particle trajectories [10]. It is based on ultra-light double-sided ladders equipped with CMOS pixel sensors, initially developed as a generic concept for the vertex detector of the International Large Detector (ILD) [11].…”
Section: Plume Detector Systemmentioning
confidence: 99%
“…The vessels are filled with a 70:30 mixture of He:CO 2 gas, which serves as the target gas with which neutrons interact. When a fast neutron enters a TPC, it may scatter off of a 4 He, 12 C, or 16 O nucleus, causing the nucleus to recoil. The recoiling nucleus will then collide with other gas atoms in the vessel until it eventually stops.…”
Section: The Tpc Systemmentioning
confidence: 99%
“…5 shows the probability of an incident neutron interacting with a gas nucleus per centimeter of travel within the fiducial volume of the vessel. Given the low probability of interaction of a neutron passing through the fiducial volume of a TPC, we scale up the elastic scattering cross sections between neutrons and 4 He, 12 C, and 16 O nuclei in the G4NDL4.6 library, each by factors of 100, to reduce the computational resources necessary to generate adequate simulated nuclear recoil samples for analysis. This leads to a roughly 100-fold increase in the nuclear recoil detection efficiency in each TPC, so when comparing measured and simulated nuclear recoil rates in the TPCs in Section 6, we divide the rates predicted by simulation by 100 to compensate for these cross section adjustments.…”
Section: Simulation Of Tpc Detectorsmentioning
confidence: 99%
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