BESIII ETOF upgrade readout electronics commissioning

Wang, Xiaozhuang; Dai, H. Y.; Wang, Zhi; Heng, Y. K.; Zhang, Jie; Cao, Ping; Ji, X. L.; Li, Cheng; Sun, Wei; Wang, Siyu; Wang, Yun

doi:10.1088/1674-1137/41/1/016103

Cited by 8 publications

(3 citation statements)

References 14 publications

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“…The PMT signals are also recorded by the QDC (CAEN V792N) and the TDC (CAEN 1290A) VME modules to give the reference time (T0). The MRPC signals, after amplification and discrimination with a NINO-based home-made Front End Electronics (FEE) board [13], are fed into the CAEN V1290A TDC. The MRPC working gas is a common mixture consisting of 90% Freon R134a, 5% 𝑆𝐹 6 and 5% iso-butane.…”

Section: Cosmic Ray Testmentioning

confidence: 99%

A new MRPC prototype with diamond-like-carbon coated glass electrodes

Wang¹,

Wang²,

Hu³

et al. 2021

J. Inst.

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The Multi-gap Resistive Plate Chamber (MRPC) has been used in many high energy physics and nuclear experiments in the last decade, such as ALICE [1] and STAR [2]. Normally, the MRPC is built with commercial floating glass (bulk resistivity ρ≈ 1012Ω· cm), which limits the rate capability to less than 1 kHz/cm2. In modern high energy physics, with the increase of colliders beam energy and luminosity, the rate capability of MRPC has to be enhanced accordingly. One normal way is to decrease the bulk resistivity ρ of the resistive plate, as the low resistive glass developed by Tsinghua University for the CBM experiment [3]. Alternatively, the surface of the electrode is also a possible path for the neutralization of the avalanche charges. Recently, we managed to carry this method out by coating a Diamond-Like-Carbon (DLC) layer on the surface of the floating glass. The DLC layer, realized by the magnetron sputtering method, has very good physical and chemical stability. The demanded surface resistivity can be achieved easily. A series of DLC-coated glasses with different resistivity has been tested in our lab. We have also made some MRPC prototypes and tested them with cosmic rays. Some preliminar results, including the operating current, the efficiency and the time resolution, have been achieved. More research is ongoing to improve the design and performance of this new method of increasing the rate capability of MRPC.

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Section: Cosmic Ray Testmentioning

confidence: 99%

A new MRPC prototype with diamond-like-carbon coated glass electrodes

Wang¹,

Wang²,

Hu³

et al. 2021

J. Inst.

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“…The board outputs correspondent LVDS signals with the signal charge encoded in their widths (Time-over-Threshold, TOT). The time accuracy (RMS) of all channels of the FEE is less than 20 ps [11,12]. The output signals from FEE were recorded by a CAEN V1290A TDC [13].…”

Section: The Readout Electronicsmentioning

confidence: 99%

Beam test of CBM-TOF MRPC prototype

Hu¹,

Wang²,

Sun³

et al. 2019

J. Inst.

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A: The Compressed Baryonic Matter spectrometer (CBM) is expected to be operational in the year 2024 at the Facility for Anti-proton and Ion Research (FAIR) in Darmstadt, Germany. CBM aims to study strongly interacting matter under extreme conditions. The key element providing hadron identification is the Time-Of-Flight (TOF) wall at incident energies between 2 and 10 AGeV. The TOF-wall covers the polar angular range from 2.5 • -25 • and full azimuth. According to the simulation results, the TOF system is required to reach a time resolution of better than 80 ps for the particle identification (PID) under high rate. The existing conceptual design foresees a 120 m 2 TOF-wall composed of Multi-gap Resistive Plate Chambers (MRPC) which is subdivided into a high rate region, a middle rate region and a low rate region. The flux in the low rate region is around 1 kHz/cm 2 . For this region, we developed a Multistrip-MRPC using thin float glass as the resistive electrode. In this paper, we present the design of these MRPC prototypes and the results obtained during the beam test at the E3 line at Beijing Electron-Positron Collider (BEPC).

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“…In the global BESIII coordinate system, the beam direction is chosen as the ẑ axis and the polar angle coverage of the barrel TOF is | cos θ| < 0.83, while that of the end cap is 0.85 < | cos θ| < 0.95. The end cap Time-Of-Flight detector was upgraded with multi-gap resistive plate chamber (MRPC) technology in summer of 2015 [5,6,7,8]. In this article, the investigation of the aging effects on the performance of the scintillation counters of the barrel TOF system of BESIII detector is described.…”

Section: Introductionmentioning

confidence: 99%

A study of aging effects of barrel Time-Of-Flight system in the BESIII experiment

Liu,

Sun,

Fang

et al. 2017

Preprint

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The Time-Of-Flight system consisting of plastic scintillation counters plays an important role for particle identification in the BESIII experiment at the BEPCII double ring e + e − collider. Degradation of the detection efficiency of the barrel TOF system has been observed since the start of physical data taking and this effect has triggered intensive and systematic studies about aging effects of the detector. The aging rates of the attenuation lengths and relative gains are obtained based on the data acquired in past several years. This study is essential for ensuring an extended operation of the barrel TOF system in optimal conditions.

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BESIII ETOF upgrade readout electronics commissioning

Cited by 8 publications

References 14 publications

A new MRPC prototype with diamond-like-carbon coated glass electrodes

A new MRPC prototype with diamond-like-carbon coated glass electrodes

Beam test of CBM-TOF MRPC prototype

A study of aging effects of barrel Time-Of-Flight system in the BESIII experiment

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