Development of Sealed MRPC with extremely low gas flow for muon tomography

Chen, X. L.; Wang, Y.; Chen, G.; Han, Dong; Guo, B.; Yu, Y.; Zhang, Q.; Lyu, Pengfei; Wang, F.

doi:10.1088/1748-0221/15/03/c03012

Cited by 8 publications

(9 citation statements)

References 12 publications

(12 reference statements)

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“…The sealed technology has succeeded the air-tightness test that lasted over three weeks [20]. In this work, we can also find evidences that indicate the good impermeability.…”

Section: Test Results and Discussionsupporting

confidence: 53%

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The CEE-eTOF wall constructed with new sealed MRPC

et al. 2020

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This paper reports the layout of the endcap Time of Flight (eTOF) wall for the External target Experiment (CEE) at the Heavy Ion Research Facility at the Lanzhou -Cooling Storage Ring (HIRFL-CSR), and highlights the forward application of a new sealed technology of Multigap Resistive Plate Chamber (MRPC). The sealed MRPC, which uses an integral 3D-printed frame glued with the outermost glass electrodes, can operate in an extremely low gas flux. A sealed MRPC prototype has been assembled and tested under cosmic rays, and performs stably at a 97.5% efficiency and a 60 ps time resolution. The sealed design, with a small gas volume and good air-tightness, shows its advantages in low gas consumption, little environmental impact, fast high voltage application and others. K: Resistive-plate chambers; Timing detectors; Instrumentation and methods for time-offlight (TOF) spectroscopy 1Corresponding author.

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“…The sealed technology has succeeded the air-tightness test that lasted over three weeks [20]. In this work, we can also find evidences that indicate the good impermeability.…”

Section: Test Results and Discussionsupporting

confidence: 53%

“…The frame is precisely designed in thickness and produced by 3D printing for the placement of glasses with specific gap width. For detailed description, see [20]. This type of the sealed MRPC has succeeded the air-tightness test, where a gas pressure excess of 1 kPa over environment can be kept at least 3 weeks without visible loss.…”

Section: Sealing Framementioning

confidence: 99%

The CEE-eTOF wall constructed with new sealed MRPC

et al. 2020

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“…To obtain a higher rate capability, the new sealed prototype should be assembled with low-resistive glass. Based on the same idea of enclosure as before, the sealing frame has been designed and produced by 3D Printing [21]. However, the lowresistive glass plate, with 0.7 mm thickness, is weaker in mechanical strength compared with the float glass; thus, it cannot be used as the panel for the sealed chamber.…”

Section: Structural Designmentioning

confidence: 99%

The High-Rate Sealed MRPC to Promote Pollutant Exchange in Gas Gaps: Status on the Development and Observations

et al. 2021

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This work reports the latest observations on the behavior of two Multigap Resistive Plate Chambers (MRPC) under wide high-luminosity exposures, which motivate the development and in-beam test of the sealed MRPC prototype assembled with low-resistive glass. The operation currently being monitored, together with previous simulation results, shows the impact of gas pollution caused by avalanches in gas gaps, and the necessity to shrink the gas-streaming volume. With the lateral edge of the detector sealed by a 3D-printed frame, a reduced gas-streaming volume of ~170 mL has been achieved for a direct gas flow to the active area. A high-rate test of the sealed MRPC prototype shows that, ensuring a 97% efficiency and 70 ps time resolution, the sealed design results in a stable operation current behavior at a counting rate of 3–5 kHz/cm2. The sealed MRPC will become a potential solution for future high luminosity applications.

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“…Alternative eco-friendly gas mixtures, found so far, are expensive and would greatly increase the detector system working cost. Fortunately, the flux of muons from cosmic rays at sea level is much lower compared to the one usually encountered at experiments with accelerators, therefore a sealed MRPC (SMRPC in the following) prototype working with an extremely low gas flow has been developed [25]. Moreover, as additional studies in this field, a simulation framework with ANSYS Maxwell+Geant4 was developed [23,24], and machine learning techniques were being tried to optimize position resolution algorithms [26].…”

Section: Environment-friendly and Low Cost Smrpc Developmentsmentioning

confidence: 99%

“…After 60 hours gas must be re-injected, for a total of about 220 ml, and this is equivalent to an average gas flow of about 0.05 ml/min. [25].…”

Section: Smrpc Developmentmentioning

confidence: 99%

MRPC technology for muon tomography

et al. 2020

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Muon tomography is an innovative high-Z material detection technology developed in recent years. The most crucial part of this technology is the high position resolution detectors used for the muon track reconstruction. Multi-Gap Resistive Plate Chambers (MRPCs in the following) are gaseous detectors first developed at CERN in middle 1990s. Considering their characteristics in terms of high efficiency, low cost, robust structure, and excellent position resolution, MRPC became the detector of choice for the TUMUTY (Tsinghua University cosmic ray muon tomography facility) system built in 2012. This paper features a summary about the latest developments on MRPC technology for muon tomography. After the success of the TUMUTY prototype, researches were carried out on larger sensitive area position resolution MRPCs with 2-D readout, and on environment-friendly sealed MRPCs (SMRPC) for industrial applications and future muon tomography systems. It was studied how encoding readout methods and external environment influence the performance of MRPC detectors. Also, an MRPC simulation frame and new data processing methods were both developed, which have provided useful information on optimal design of the future position resolution MRPCs and muon tracking systems.

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Development of Sealed MRPC with extremely low gas flow for muon tomography

Cited by 8 publications

References 12 publications

The CEE-eTOF wall constructed with new sealed MRPC

The CEE-eTOF wall constructed with new sealed MRPC

The High-Rate Sealed MRPC to Promote Pollutant Exchange in Gas Gaps: Status on the Development and Observations

MRPC technology for muon tomography

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