Abstract
Abstract
The paper presents the development of a low-power and
high-integration readout ASIC (WASA) for time projection chambers
(TPCs). Each channel of the ASIC consists of the analog front-end, a
waveform sampling ADC and digital signal processing circuits. To
reduce power consumption, a simple CR-RC shaper and a digital
trapezoid filter are adopted to achieve comparable performance to a
CR-RC4 shaper with much lower power. Trigger logic and data
buffer have also been integrated to reduce the data bandwidth. A
16-channel prototype chip was fabricated in a 65 nm CMOS process and
was tested. The test results were consistent with the simulation. At
40 MSPS sampling rate, the power consumption of the chip was only
4.94 mW per channel, including 1.38 mW from the
analog front-end, 0.83 mW from the waveform sampling ADC
and 2.73 mW from digital logics. The equivalent noise
charge of 569 e+14.8 e/pF has been
achieved. The measured dynamic range was 120 fC and the
integral nonlinearity was less than 0.74%. More design details
and test results will be given in this paper.
Reference15 articles.
1. Studies on GEM modules for a Large Prototype TPC for the ILC;LCTPC Collaboration;Nucl. Instrum. Meth. A,2017
2. Status and prospects of TPC module and prototype at high luminosity Z physics on CEPC;Yu;Int. J. Mod. Phys. A,2022
3. STAR TPC at RHIC;STAR Collaboration;IEEE Trans. Nucl. Sci.,1997
4. The ALICE TPC—An innovative device for heavy ion collisions at LHC;Glässel;Nuclear Instruments and Methods in Physics Research A,2007
5. CEPC Conceptual Design Report: Volume 2 - Physics Detector;CEPC Study Group Collaboration,2018