Time-projection chamber for Multi-Purpose Detector of NICA project at JINR

Vereschagin, S.; Bazhazhin, A. G.; Fateev, O.; Lukstiņš, J.; Movchan, S.; Razin, S. V.; Zaporozhets, S.; Zruev, V.

doi:10.1016/j.nima.2019.162793

Cited by 7 publications

(4 citation statements)

References 3 publications

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“…For example, for NICA MPD TPC readout chambers the expected rate of highly ionizing particles is about ∼ 10 5 per cm 2 per year [1]. Assuming the gain and event rate requirements for the TPC subsystem [2], it means that the multiple discharge events will regularly occur during the operation. So the technology to be used in the new MPD TPC readout chambers should provide not only robustness to single discharge events, but also stable operation after multiple accumulated discharge events.…”

Section: E-mail: Kafanaciev@gmailcommentioning

confidence: 99%

Effect of multiple discharges on accumulated damage to the DLC anode layer of a resistive Well Electron Multiplier

et al. 2023

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A prototype of the WEM (Well Electron Multiplier) detector with an active area of 10 × 10 mm2 and a resistive DLC anode was tested in terms of robustness to electrical discharges induced by highly ionizing particles (241Am alpha source). The perforated structure of the WEM detector was produced from a 500 μm thick FR4 with drilled holes of 200 μm in diameter and 500 μm in pitch. The resistive anode was made of 100 nm thick DLC layer with 30 MOhm/square sheet resistance deposited on the anode grid electrode. The anode grid electrode is used to distribute voltage to the resistive layer and provide fast charge evacuation. The detector was operated in Ar:CO2 (90:10) gas mixture at gas gain of 3,500. The alpha source was placed in the drift gap. The WEM detector with intrinsic capacitance of 34 pF did not show visible damage and changes in performance after 1 million accumulated discharges. To simulate a large area detector, we added a capacitance up to 1 nF in parallel with the test device. The results of the experiments with an additional capacitance revealed that a small WEM prototype can't be directly scaled to the dimensions more than 60 × 60 mm2 without losing the robustness to discharges. We assume that the observed damage could be caused by the design features of the prototype. The grid anode electrode with a thickness of 35 μm results in a gap between the perforated FR4 board and the resistive anode board. Simulations of the electric field distribution with Comsol Multiphysics software revealed a significant electric field strength in this gap. This could lead to electric discharge path bypassing the protective resistive DLC layer. A possible solution to this problem could be additional insulation of the anode grid electrode with a coverlay similar to that used in bulk MicroMegas production.

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Section: E-mail: Kafanaciev@gmailcommentioning

confidence: 99%

Effect of multiple discharges on accumulated damage to the DLC anode layer of a resistive Well Electron Multiplier

et al. 2023

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“…The second PCB operates as a data multiplexer and a FEC controller. Its main part is an FPGA with built-in high-speed transceivers [3].…”

Section: Front-end Cardmentioning

confidence: 99%

“…Time Projection Chamber (TPC) is the main tracker of the MPD. The TPC design is based on experience of the STAR and the ALICE TPC detectors [3,4]. Each of the two endcaps of the TPC will be equipped with 12 Read-Out Chambers (ROC) realized as a multi-wire proportional chamber with cathode pad readout.…”

Section: Introductionmentioning

confidence: 99%

Front-end electronics development for TPC/MPD detector of NICA project

Vereschagin¹,

Movchan²,

Zaporozhets

2020

J. Inst.

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Time Projection Chamber (TPC) is the main tracker of the Multi-Purpose Detector (MPD) at the Joint Institute for Nuclear Research for the NICA collider (Nuclotron-based Ion Collider fAcility). The TPC Front-End Electronics (FEE) will operate with event rate up to 7 kHz. The electronics is based on the novel ASIC SAMPA, FPGAs and high-speed serial links. Each of 24 readout chambers will be served by 62 Front-End Cards (FEC) and one Readout and Control Unit (RCU). The whole system will contain 1488 FECs and 24 RCUs. The total number of registration channels is 95232. The article presents the current status of the FEE development and results of the FEC testing.

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“…The Time-Projection Chamber (TPC) is the main tracking detector of the MPD central barrel. It is a gas detector for 3-dimensional tracking and particle identification for high multiplicity events [1][2][3][4].…”

Section: Introductionmentioning

confidence: 99%

MPD TPC status

et al. 2020

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In the frame of the JINR scientific program on study of hot and dense baryonic matter a new accelerator complex Ion Collider fAcility (NICA) based on the Nuclotron-M is under realization. Two interaction points are foreseen at NICA for two detectors. One of these detectors, the Multi-Purpose Detector (MPD), is optimized for investigations of heavy-ion collisionsat a luminosity up to 1027 cm−2 s−1 for ions up to Au79+. The Time-Projection Chamber (TPC) is the main tracking detector of the MPD central barrel. It is a well-known detector for 3-dimensional tracking and particle identification for high multiplicity events. The conceptual layout of MPD, TPC design and it's parameters, the current status of the readout based on multiwire proportional chamber (MWPC) and readout electronics based on SAMPA chip as well as the status of TPC subsystems are presented.

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Time-projection chamber for Multi-Purpose Detector of NICA project at JINR

Cited by 7 publications

References 3 publications

Effect of multiple discharges on accumulated damage to the DLC anode layer of a resistive Well Electron Multiplier

Effect of multiple discharges on accumulated damage to the DLC anode layer of a resistive Well Electron Multiplier

Front-end electronics development for TPC/MPD detector of NICA project

MPD TPC status

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