Bulletin of the American Physical Society
6th Joint Meeting of the APS Division of Nuclear Physics and the Physical Society of Japan
Sunday–Friday, November 26–December 1 2023; Hawaii, the Big Island
Session 3WCA: Fast Time Silicon Detectors towards 4D- Trackers IInvited Workshop
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Chair: Artur Apresyan Room: Hilton Waikoloa Village Kings 3 |
Monday, November 27, 2023 9:00AM - 9:30AM |
3WCA.00001: Introduction and history of Capacitive Coupled Low Gain Avalanche Diode (AC-LGAD) detectors. Invited Speaker: Koji Nakamura Particle detectors at future lepton or hadron colliders will require very large area trackers with O(10)um spatial resolution. A timing capability of O(10)ps in addition should allow more efficient and reliable reconstruction of particles from primary collisions in high intensity hadron colliders. Precision timing together with spatial information will be critical not only to disentangle spatially overlapping or other with ambiguous events but also to identify the particles with different mass as well as sensitive to the mass of heavy unknown charged particles. The Low Gain Avalanche Diode (LGAD) technology is now becoming mature achieving a 30ps time resolution. Concerning the spatial resolution, high granularity electrodes potentially introduce a non-uniformity of timing performance. The Capacitive coupled LGAD (AC-LGAD) sensors fabricated by Hamamatsu Photonics (HPK) and Brookhaven National Laboratory (BNL) have shown to achieve a 20-30ps timing resolution with the finely segmented electrodes fully uniformly. In this presentation, a general introduction and history of AC-LGAD detectors will be described. |
Monday, November 27, 2023 9:30AM - 10:00AM |
3WCA.00002: Development of novel detectors for 4D-tracking at BNL Invited Speaker: Alessandro Tricoli Low Gain Avalanche Detectors, LGADs, are widely considered for fast-timing applications in high energy physics, nuclear physics, precision measurements of rare processes, space science, medical imaging, biology, quantum information among others. Several novel concepts are being pursued to also allow for precision tracking with a 100% fill factor in the same device. At Brookhaven National Laboratory (BNL) we are designing, fabricating and testing several novel concepts based on the LGAD technology for future 4D tracking systems. These devices are being optimized and studied for high radiation environments at hadron colliders, for sparse readout experiments at the Electron Ion Collider (EIC), for low mass detectors at lepton colliders, for extreme environmental conditions in space, for X-ray and low-energy electron detection experiments etc. Strip and pixel sensors with different properties have been fabricated at BNL and tested. Among these ,more notably are sensors with different active thickness, i.e. from 50 um to 20 um, different doping of the gain layer, different electrode geometry etc. The sensors are tested in-house with particles from radioactive sources and lasers, using also dedicated fast-time ASICs. |
Monday, November 27, 2023 10:00AM - 10:30AM |
3WCA.00003: Recent measurement results of HPK AC-LGAD sensors for future hadron colliders Invited Speaker: Sayuka Kita Low-Gain Avalanche Diode (LGAD) technology of semiconductor detectors improves the timing resolution suitable for the detection of charged particles in future hadron colliders. We are developing AC-LGAD detectors capable of both high timing (~20ps) and spatial (~o(10)um) resolutions collaborating with HPK. |
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