The Cylindrical GEM Inner Tracker of the BESIII experiment: prototype test beam results

Lavezzi, L.; Canale, N.; Ferroli, R. Baldini; Soldani, E.; Malaguti, R.; Yan, L.; Spataro, S.; Chiozzi, S.; Chai, Jian; Morello, G.; Gatta, M.; Cerioni, S.; Scodeggio, M.; Pellegrino, J.; Sosio, S.; Garzia, I.; Verma, S.; Bertani, M.; Fioravanti, E.; Felici, G.; Wheadon, R.; Evangelisti, F.; Rolo,; Mignone, M.; Cossio, F.; Patterí, P.; Leng, Cy.; Tskhadadze, E.; Bettoni, D.; Maggiora, M.; Dong, J.; Bianchi, F.; Marcello, S.; Li, H.; Carassiti, V.; Amoroso, A.; Savrié, M.; Melchiorri, M.; Ramusino, A. Cotta; Farinelli, R.; Pacetti, S.; Calcaterra, A.; Capodiferro, M.; Alexeev, M.; Cibinetto, G.; Pelosi, A.; Rivetti, A.; Mori, F. De; Fava, L.; Greco, M.; Destefanis, M.

doi:10.1088/1748-0221/12/07/c07038

Cited by 7 publications

(2 citation statements)

References 8 publications

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“…The installation of the new detector is scheduled to take place during the 2018 upgrade and the project features three independent tracking layers, each made of a cylindrical triple-GEM detector, which allows for high gains and low discharge probability [2]. The analogue readout of the CGEM employs charge centroid and micro-TPC algorithms to improve the spatial resolution to better than 130 µm while increasing the strip pitch to 650 µm, thus reducing the total number of channels to about 10 000 [3]. These channels are readout by a dedicated front-end ASIC, TIGER (Turin Integrated Gem Electronics for Readout), which has been designed to address the needs of the CGEM tracker.…”

Section: Introductionmentioning

confidence: 99%

Design and Characterization of the Readout ASIC for the BESIII CGEM Detector

Cossio¹,

Maggiora²,

Greco³

et al. 2018

Proceedings of Topical Workshop on Electronics for Particle Physics — PoS(TWEPP-17)

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TIGER (Turin Integrated Gem Electronics for Readout) is a mixed-mode ASIC for the readout of signals from CGEM (Cylindrical Gas Electron Multiplier) detector in the upgraded inner tracker of the BESIII experiment, carried out at BEPCII in Beijing. The ASIC includes 64 channels, each of which features a dual-branch architecture optimized for timing and energy measurement. The input signal time-of-arrival and charge measurement is provided by low-power TDCs, based on analogue interpolation techniques, and Wilkinson ADCs, with a fully-digital output. The silicon results of TIGER first prototype are presented showing its full functionality.

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Section: Introductionmentioning

confidence: 99%

Design and Characterization of the Readout ASIC for the BESIII CGEM Detector

Cossio¹,

Maggiora²,

Greco³

et al. 2018

Proceedings of Topical Workshop on Electronics for Particle Physics — PoS(TWEPP-17)

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“…The readout anode of each CGEM is segmented with XV patterned strips with a 650 µm pitch. Complementary charge centroid and µ-TPC algorithms are then used to provide an x − y position resolution of 130 µm [2] on the track reconstruction. The analogue readout of the detector, which allows reducing the total number of channels to around 10 000, requires dedicated front-end electronics.…”

Section: Introductionmentioning

confidence: 99%

A custom readout electronics for the BESIII CGEM detector

Rolo¹,

Alexeev²,

Amoroso³

et al. 2017

J. Inst.

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A: 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 µm while loosening the pitch strip to 650 µm, 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. K: 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)

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TIGER: A front-end ASIC for timing and energy measurements with radiation detectors

Rivetti

Alexeev

Bugalho

et al. 2019

Nuclear Instruments and Methods in Physics Research Section A:

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A mixed-signal ASIC for timing and energy measurements with radiation detectors is presented. The chip embeds 64 channels, each of which features a charge-sensitive amplifier followed by a dual-shaper coupled to low-offset discriminators. A versatile back-end, incorporating low-power Time to Digital Converters and Wilkinson Analog to Digital Converters with derandomizing buffers allows to encode both the time of arrival and the charge of the input signal. The ASIC is designed for a maximum detector capacitance of 100 pF and an event rate in excess of 60 kHz per channel. A peak detector samples the input signal with an excellent linearity in the range 1 ÷ 50 fC. Charge digitization with Time-over-Threshold is also supported to extend the dynamic range. Fabricated in a 110 nm CMOS process, the chip dissipates 10 mW/channel. The ASIC was primarily developed to readout the cylindrical GEM detector of the BESIII experiment. For its characteristics it can serve however a broad class of radiation sensors, including silicon microstrip detectors.

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The Cylindrical GEM Inner Tracker of the BESIII experiment: prototype test beam results

Cited by 7 publications

References 8 publications

Design and Characterization of the Readout ASIC for the BESIII CGEM Detector

Design and Characterization of the Readout ASIC for the BESIII CGEM Detector

A custom readout electronics for the BESIII CGEM detector

TIGER: A front-end ASIC for timing and energy measurements with radiation detectors

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