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

Cossio, F.; Maggiora, M.; Greco, M.; Mignone, M.; Wheadon, R.; Rolo, M.; Alexeev, M.; Chai, J.; Leng, C.; Li, H; Weishuai, Cheng; Varela, J.; Bugalho, R.; Francesco, A. Di; Rivetti, A.; Marcello, S.

doi:10.22323/1.313.0044

Cited by 2 publications

(2 citation statements)

References 5 publications

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“…Gain was evaluated on channel 63 using an external pulse generator. A gain of 10.4 mV/fC was obtained in agreement with simulations [4]. An unexpected shift on the amplifier baseline was observed on time branch, not affecting operation.…”

Section: Tigersupporting

confidence: 87%

TIGER: a custom readout electronics for the BESIII CGEM detector

Greco¹,

Alexeev²,

Bugalho³

et al. 2019

Proceedings of 5th International Conference on Micro-Pattern Gas Detectors — PoS(MPGD2017)

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TIGER (aka Torino Integrated Gem Electronics for Readout) is the ASIC designed at INFN-Torino for the front-end electronics of a cylindrical triple GEM detector, proposed to replace the inner tracker of BESIII spectrometer (Beijing Electron Spectrometer). The high luminosity of the collider, operational at the Institute of High Energy Physics in Beijing (IHEP), allows to measure states of charmonium and open charm, to carry out light hadrons spectroscopy and to study τ lepton physics, but it caused aging and degradation problems to the tracking performance. The 64-channel chip in analog-digital mixed mode has been designed using CMOS 110 nm UMC technology in order to be exported to China. Each channel has two branches: branch E for charge measurements and branch T for time measurements.

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Section: Tigersupporting

confidence: 87%

TIGER: a custom readout electronics for the BESIII CGEM detector

Greco¹,

Alexeev²,

Bugalho³

et al. 2019

Proceedings of 5th International Conference on Micro-Pattern Gas Detectors — PoS(MPGD2017)

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“…After a first prototype version, from which some design issues were detected and corrected [54,55], the final version of TIGER was produced in a dedicated engineering run for the full instrumentation of the CGEM-IT. The on-silicon electrical characterization proved the full functionality of the ASIC: all measured parameters showed good agreement with the design specifications and expected performance.…”

Section: Tiger Asicmentioning

confidence: 99%

The CGEM-IT: An Upgrade for the BESIII Experiment

et al. 2022

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The BESIII experiment has been collecting data since 2009 at the e+e− collider BEPCII in Beijing, a charm-τ factory characterized by high statistics and high precision. The discovery of exotic charmonium-like states and the still open questions in low-energy QCD led to an extension of the experimental program, with several upgrades. This review focuses on the CGEM-IT, the innovative solution proposed to replace the current inner tracker, which is aging. It consists of three, co-axial, cylindrical triple-GEM detectors and will be the first cylindrical GEM operating inside a 1 T magnetic field with analogue readout. For this purpose, a dedicated mixed-signal ASIC for the readout of CGEM-IT signals and FPGA-based electronics for data processing have been developed. The simultaneous measurement of both ionization charge and time distribution enables three reconstruction algorithms, to cope with the asymmetry of the electron avalanche in the magnetic field and with non-orthogonal incident tracks. The CGEM-IT will not only restore the design efficiency but also improve the secondary vertex reconstruction and the radiation tolerance. The gas mixture and gain settings were chosen to optimize the position resolution to ∼130 µm in the transverse plane and better than 350 µm along the beam direction. This paper addresses the innovative aspects in terms of construction, readout, and software, employed to achieve the design goals as well as the experimental measurements performed during the development and commissioning of the CGEM-IT.

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

Cited by 2 publications

References 5 publications

TIGER: a custom readout electronics for the BESIII CGEM detector

TIGER: a custom readout electronics for the BESIII CGEM detector

The CGEM-IT: An Upgrade for the BESIII Experiment

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