A thin float glass MRPC for the outer region of CBM-TOF wall Weiping, Zhu; Yi, Wang; Shengqin, Feng ...
Nuclear instruments & methods in physics research. Section A, Accelerators, spectrometers, detectors and associated equipment,
2014, Letnik:
735
Journal Article
Recenzirano
A Multi-gap Resistive Plate Chamber (MRPC) made out of thin float glass is proposed for the outer region of the time of flight (TOF) system for the Compressed Baryonic Matter experiment at FAIR. ...Usually MRPCs are assembled with ordinary glass plates of 0.5 mm or more thickness, but their rate capability is less than the CBM requirement (1.5 kHz/cm2). There are two ways to improve the rate capability. The first way is to reduce the bulk resistivity of the glass plates. The second is to reduce the thickness of the glass plates. Tsinghua University has made significant progress in the development of low resistive glass and high rate MRPCs. In this paper we report on three MRPCs produced with float glass plates of 0.7 mm, 0.5 mm and 0.35 mm thickness. Tests with cosmic rays and X-rays were performed at Tsinghua University. The results show that thin float glass MRPCs work well and have the rate capability necessary to meet the demands of the CBM-TOF outer region. Further studies were performed using a continuous 1 GeV deuterium beam at the Nuclotron accelerator at the Joint Institute for Nuclear Research (JINR). Time resolution of about 70 ps and efficiency higher than 90% were obtained for flux densities up to 3 kHz/cm2, exceeding the requirement for the CBM-TOF outer region.
We report the timing and spatial resolution from the Muon Telescope Detector (MTD) installed in the STAR experiment at RHIC. Cosmic ray muons traversing the STAR detector have an average transverse ...momentum of 6GeV/c. Due to their very small multiple scattering, these cosmic muons provide an ideal tool to calibrate the detectors and measure their timing and spatial resolution. The values obtained were ~100ps and ~1–2cm. These values are comparable to those obtained from cosmic-ray bench tests and test beams.
The TOFp/pVPD time-of-flight system for STAR Llope, W.J; Geurts, F; Mitchell, J.W ...
Nuclear instruments & methods in physics research. Section A, Accelerators, spectrometers, detectors and associated equipment,
04/2004, Letnik:
522, Številka:
3
Journal Article
Recenzirano
Odprti dostop
A time-of-flight system was constructed for the STAR Experiment for the direct identification of hadrons produced in
197Au+
197Au collisions at RHIC. The system consists of two separate detector ...subsystems, one called the Pseudo Vertex Position Detector (pVPD, the “start” detector) and the other called the Time of Flight Patch (TOFp, the “stop” detector). Each detector is based on conventional scintillator/phototube technology and includes custom high-performance front-end electronics and a common CAMAC-based digitization and read-out. The design of the system and its performance during the 2001 RHIC run will be described. The start resolution attained by the pVPD was 24
ps, implying a pVPD single-detector resolution of 58
ps. The total time resolution of the system averaged over all detector channels was 87
ps, allowing direct
π/
K/
p discrimination for momenta up to ∼1.8
GeV/
c, and direct (
π+
K)/
p discrimination up to ∼3
GeV/
c.
Performance of the prototype MRPC detector for STAR Geurts, F.; Shao, M.; Bonner, B. ...
Nuclear instruments & methods in physics research. Section A, Accelerators, spectrometers, detectors and associated equipment,
11/2004, Letnik:
533, Številka:
1-2
Journal Article
Recenzirano
A prototype 168-channel multi-gap resistive plate chamber (MRPC) time-of-flight system for the STAR experiment at RHIC was completed in February 2002, tested for 10 weeks at the AGS at BNL, and ...installed in the STAR detector for the 2002–2003 physics run. At the AGS, the MRPC detectors were operated on a number of different gas mixtures, high voltages, and threshold voltages. The results for detection efficiency, time resolution, streamer probability, and noise rates are presented.
A large-area Time-of-Flight (TOF) system based on Multi-gap Resistive Plate Chambers (MRPCs) has recently been installed in the STAR experiment at RHIC. The approximately 23000 detector channels are ...read out and digitized using custom electronics based on the CERN NINO and HPTDC chips. The data are sent to the experimental data acquisition system (DAQ) using the ALICE fiber optics based Detector Data Link (DDL). The readout system consists of a total of approximately 2100 custom electronics boards mounted directly on 120 TOF trays, as well as four DAQ and trigger interface boards outside the detector that collect data from 30 trays each and send it to DAQ. Control and monitoring of these electronics boards is done using a tiered network of CANbus connections to a control PC. We describe the physical implementation and topology of the CANbus connections and the custom protocol developed for this project. Several command-line tools as well as a Qt4-based graphical tool developed on the host side to facilitate configuration, control, and monitoring of the TOF system are also described.
The STAR endcap electromagnetic calorimeter Allgower, C.E.; Anderson, B.D.; Baldwin, A.R. ...
Nuclear instruments & methods in physics research. Section A, Accelerators, spectrometers, detectors and associated equipment,
03/2003, Letnik:
499, Številka:
2
Journal Article
Recenzirano
The STAR endcap electromagnetic calorimeter will provide full azimuthal coverage for high-
p
T photons, electrons and electromagnetically decaying mesons over the pseudorapidity range 1.086⩽
η⩽2.00. ...It includes a scintillating-strip shower-maximum detector to provide π
0/γ discrimination and preshower and postshower layers to aid in distinguishing between electrons and charged hadrons. The triggering capabilities and coverage it offers are crucial for much of the spin physics program to be carried out in polarized proton–proton collisions.
The STAR trigger Bieser, F.S.; Crawford, H.J.; Engelage, J. ...
Nuclear instruments & methods in physics research. Section A, Accelerators, spectrometers, detectors and associated equipment,
03/2003, Letnik:
499, Številka:
2
Journal Article
Recenzirano
We describe the trigger system that we designed and implemented for the STAR detector at RHIC. This is a
10
MHz
pipelined system based on fast detector output that controls the event selection for ...the much slower tracking detectors. Results from the first run are presented and new detectors for the 2001 run are discussed.
The performance of the TOFr tray in STAR Wu, Jian; Bonner, B.; Chen, H.F. ...
Nuclear instruments & methods in physics research. Section A, Accelerators, spectrometers, detectors and associated equipment,
02/2005, Letnik:
538, Številka:
1
Journal Article
Recenzirano
A tray of the STAR Time-Of-Flight detector (TOFr) based on the Multi-gap Resistive Plate Chamber technology was constructed and then operated in STAR during the RHIC 2003 spring physics run after ...beam-tested at AGS of BNL. The calibration procedure of the tray is introduced. The main properties of the chambers in the tray fulfill the requirements of the STAR experiment.
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