Development of a radiation tolerant fine pitch planar pixel detector by HPK/KEK

Autor: Hajime Nanjyo, Osamu Jinnouchi, Yasunori Sawada, Yohei Abo, Koji Nakamura, Kazuki Uchiyama, Kazuyuki Sato, Kazunori Hanagaki, Yoshinobu Unno, J. Suzuki, Hirokazu Yamamoto, S. Kamada, Hitomi Tokutake, Manabu Togawa, Yuto Nakamura, Yoichi Ikegami, Kazuhisa Yamamura, Sayaka Wada, Daiki Yamamoto, Kazuhiko Hara
Rok vydání: 2019
Předmět:
Zdroj: Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment. 924:64-68
ISSN: 0168-9002
DOI: 10.1016/j.nima.2018.09.015
Popis: In the recent development of pixel detectors for the inner part of the ATLAS detector upgrade of the High Luminosity LHC, a thin, typically 150 μ m , planar pixel detector has been developed. To reduce hit occupancy, the pixel size is smaller compared to the currently operating pixel detector in ATLAS and the 2 pitch options, 50 μ m × 50 μ m and 25 μ m × 100 μ m , are readout by the same 50 μ m × 50 μ m pitch readout ASIC. To evaluate the performance of the fine pitch pixel detector, two methods are tested, a) emulated using the current ASIC (FE-I4) using non-uniform size of pixel, where two 50 μ m × 250 μ m pixels are spitted to 50 μ m × 50 μ m and 50 μ m × 450 μ m , (b) used new ASIC (FE65p2) with full 50 μ m × 50 μ m pitch. The FE65p2 is the prototype ASIC produced by TSMC using 65 nm CMOS process, with an expected lower noise than FE-I4. In this paper, basic devices performance and testbeam results before and after irradiation are presented.
Databáze: OpenAIRE
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