A prototype MRPC beam test for the BESIII ETOF upgrade

It is proposed to upgrade the endcap time-of-flight (ETOF) of the Beijing Spectrometer III (BESIII) with a multi-gap resistive plate chamber (MRPC), aiming at an overall time resolution of about 80 ps. After completing the entire readout electronics system, some experiments, such as heat radiation, radiation hardness and large-current beam tests, have been carried out to confirm the reliability and stability of the readout electronics. An on-detector test of the readout electronics has also been performed with the beam at the BEPCII E3 line. The test results indicate that the readout electronics system fulfills its design requirements.

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“…Time resolutions of better than 50 ps were obtained, as described in Refs. [6][7][8], which verified the physical design of the new ETOF.…”

Section: Introductionsupporting

confidence: 55%

BESIII ETOF upgrade readout electronics commissioning

et al. 2017

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“…The MRPC is placed in a aluminum box with a thickness of 1 mm which is filled with a standard gas mixture for MRPC. The component of the gas is 90% Freon + 5% SF6 + 5% C4H10 [11].…”

Section: Simulation Results Of Scintillator-based Etof and Discussionmentioning

confidence: 99%

A GEANT4 simulation study of BESIII endcap TOF upgrade

张辉¹,

邵明²,

李澄³

et al. 2013

Chinese Phys. C

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Abstract. A GEANT4-based Monte-Carlo model is developed to study the performance of Endcap Time-Of-Flight (ETOF) at BESIII. It's found that the multiple scattering effects, mainly from the materials at the MDC endcap, can cause multi-hit on the ETOF's readout cell and significantly influence the timing property of ETOF. Multi-gap Resistive Plate Chamber (MRPC) with a smaller readout cell structure is more suitable for ETOF detector due to significantly reduced multi-hit rate, from 71.5% for currently-used scintillator-based ETOF to 21.8% or 16.7% for MRPC-based ETOF, depending on the readout pad size used. The timing performance of a MRPC ETOF is also improved. These simulation results suggest and guide an ETOF upgrade effort at BESIII.

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“…The σ MRPC of one pad of one MRPC module was about 53.82±1.4 ps in figure 9 for example, whose operation voltage on the positive and negative electrode was ±6.8 kV. This result also could be corrected for better level by the Time-Position (T-P) correction with the position detectors' information from the Si detector, which will be further studied [19,20].…”

Section: The Time Resolution Of T0 With Beam Particlementioning

confidence: 94%

The high timing resolution T0 system in IHEP E3 beam line

Qian¹,

Wang²,

Ning³

et al. 2012

J. Inst.

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The designed aim of the multi-gap resistive plate chamber module (MRPC) for the BESIII endcap TOF upgrade project is less than 50 ps, so a Time-zero (T0) system is required to achieve the timing resolution at 30 ps level. After study the scintillator, the PMT, the DAQ subsystem, the assemblage form and the distributing position, the timing resolution of this type of T0 detector composed of scintillator BC420 coupling with PMT H6533 could achieve 30 ps level. Further more, the T0 could also perform the particle identification (proton and pion) just as the beam TOF and EMC detectors during the beam test process for the compelling result. For this type of T0 system, the MRPC beam test was finished and achieved a compelling result.

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A prototype MRPC beam test for the BESIII ETOF upgrade

Cited by 20 publications

References 4 publications

BESIII ETOF upgrade readout electronics commissioning

BESIII ETOF upgrade readout electronics commissioning

A GEANT4 simulation study of BESIII endcap TOF upgrade

The high timing resolution T0 system in IHEP E3 beam line

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