A custom readout electronics for the BESIII CGEM detector

被引：12

作者：

Rolo, M. Da Rocha ^{[6
]}

Alexeev, M. ^{[6
,12
]}

Amoroso, A. ^{[6
,12
]}

Ferroli, R. Baldini ^{[1
,3
]}

Bertani, M. ^{[3
]}

Bettoni, D. ^{[2
]}

Bianchi, F. ^{[6
,12
]}

Bugalho, R. ^{[8
]}

Calcaterra, A. ^{[3
]}

Canale, N. ^{[2
]}

Capodiferro, M. ^{[3
,5
]}

Carassiti, V. ^{[2
]}

Cerioni, S. ^{[3
]}

Chai, J. Y. ^{[1
,6
,9
]}

Chiozzi, S. ^{[2
]}

Cibinetto, G. ^{[2
]}

Cossio, F. ^{[6
,9
]}

Ramusino, A. Cotta ^{[2
]}

De Mori, F. ^{[6
,12
]}

Destefanis, M. ^{[6
,12
]}

Di Francesco, A. ^{[8
]}

Dong, J.

Evangelisti, F. ^{[2
]}

Farinelli, R. ^{[2
,10
]}

Fava, L. ^{[6
]}

Felici, G. ^{[3
]}

Fioravanti, E. ^{[2
]}

Garzia, I. ^{[2
,10
]}

Gatta, M. ^{[3
]}

Greco, M. ^{[6
,12
]}

Lavezzi, L. ^{[1
,6
]}

Leng, C. Y. ^{[1
,6
,9
]}

Li, H. ^{[1
,6
]}

Maggiora, M. ^{[6
,12
]}

Malaguti, R. ^{[2
]}

Marcello, S. ^{[6
,12
]}

Marciniewski, P. ^{[13
]}

Melchiorri, M. ^{[2
]}

Mezzadri, G. ^{[2
,10
]}

Mignone, M. ^{[6
]}

Morello, G. ^{[3
]}

Pacetti, S. ^{[4
,11
]}

Patteri, P. ^{[3
]}

Pellegrino, J. ^{[6
,12
]}

Pelosi, A. ^{[3
,5
]}

Rivetti, A. ^{[6
]}

Savrie, M. ^{[2
,10
]}

Scodeggio, M. ^{[2
,10
]}

Soldani, E. ^{[3
]}

Sosio, S. ^{[6
,12
]}

机构：

[1] Chinese Acad Sci, Inst High Energy Phys, 19B YuquanLu, Beijing 100049, Peoples R China

[2] INFN, Sez Ferrara, Via G Saragat 1, I-44122 Ferrara, Italy

[3] INFN, Lab Nazl Frascati, Via E Fermi 40, I-00044 Rome, Italy

[4] INFN, Sez Perugia, Via A Pascoli 14, I-06123 Perugia, Italy

[5] Univ Roma La Sapienza, INFN, Sez Roma, Ple A Moro 2, I-00185 Rome, Italy

[6] INFN, Sez Torino, Via P Giuria 1, I-10125 Turin, Italy

[7] JINR, Joliot Curie 6, Dubna 141980, Moscow Region, Russia

[8] Lab Instrumentacao & Fis Expt Particulas LIP, Av Elias Garcia 14, P-1000149 Lisbon, Portugal

[9] Politecn Torino, Dipartimento Elettron & Telecomunicaz, Corso Duca Abruzzi 24, I-10129 Turin, Italy

[10] Univ Ferrara, Dipartimento Fis, Via G Saragat 1, I-44122 Ferrara, Italy

[11] Univ Perugia, Dipartimento Fis & Geol, Via A Pascoli 14, I-06123 Perugia, Italy

[12] Univ Torino, Dipartimento Fis, Via P Giuria 1, I-10125 Turin, Italy

[13] Uppsala Univ, Dept Phys & Astron, Lagerhyddsvagen 1, S-75237 Uppsala, Sweden

来源：

JOURNAL OF INSTRUMENTATION | 2017年 / 12卷

关键词：

Analogue electronic circuits; CMOS readout of gaseous detectors; Front-end electronics for detector readout; Micropattern gaseous detectors (MSGC; GEM; THGEM; RETHGEM; MHSP; MICROPIC; MICROMEGAS; InGrid etc);

D O I：

10.1088/1748-0221/12/07/C07017

中图分类号：

TH7 [仪器、仪表];

学科分类号：

0804 ; 080401 ; 081102 ;

摘要：

For the upgrade of the inner tracker of the BESIII spectrometer, planned for 2018, a lightweight tracker based on an innovative Cylindrical Gas Electron Multiplier (CGEM) detector is now under development. The analogue readout of the CGEM enables the use of a charge centroid algorithm to improve the spatial resolution to better than 130 mu m while loosening the pitch strip to 650 mu m, which allows to reduce the total number of channels to about 10 000. The channels are readout by 160 dedicated integrated 64-channel front-end ASICs, providing a time and charge measurement and featuring a fully-digital output. The energy measurement is extracted either from the time-over-threshold (ToT) or the 10-bit digitisation of the peak amplitude of the signal. The time of the event is generated by quad-buffered low-power TDCs, allowing for rates in excess of 60 kHz per channel. The TDCs are based on analogue interpolation techniques and produce a time stamp (or two, if working in ToT mode) of the event with a time resolution better than 50 ps. The front-end noise, based on a CSA and a two-stage complex conjugated pole shapers, dominate the channel intrinsic time jitter, which is less than 5 ns r.m.s. The time information of the hit can be used to reconstruct the track path, operating the detector as a small TPC and hence improving the position resolution when the distribution of the cloud, due to large incident angle or magnetic field, is very broad. Event data is collected by an off-detector motherboard, where each GEM-ROC readout card handles 4 ASIC carrier FEBs (512 channels). Configuration upload and data readout between the off-detector electronics and the VME-based data collector cards are managed by bi-directional fibre optical links. This paper covers the design of a custom front-end electronics for the readout of the new inner tracker of the BESIII experiment, addressing the relevant design aspects of the detector electronics and the front-end ASIC for the CGEM readout, and reviewing the first silicon results of the chip prototype.

引用

页数：9

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