GEM Detector Performance Assessment in the BM@N Experiment (original) (raw)
Related papers
Simulation of the GEM detector for BM@N experiment
EPJ Web of Conferences
The Gas Electron Multiplier (GEM) detector is one of the basic parts of the BM@N experiment included in the NICA project. The simulation model that takes into account features of signal generation process in an ionization GEM chamber is presented in this article. Proper parameters for the simulation were extracted from data retrieved with the help of Garfield++ (a toolkit for the detailed simulation of particle detectors). Due to this, we are able to generate clusters in layers of the micro-strip readout that correspond to clusters retrieved from a real physics experiment. 2 BM@N GEM tracker The BM@N central tracking system is comprised of GEM chambers with two-coordinate micro-strip readout [4]. Each GEM chamber registers the ionization trail left by charged particle in the sensitive gas volume. The overall structure of the detector is a set of separated GEM stations that are located along the beam-axis at a certain distance from each other. Full GEM tracker configuration (figure 1) includes 12 such stations, each of these has a certain type of the GEM chamber. GEM plane is divided into areas. The areas called "hot zones" are generally placed at the center of the station. Thus we have parts with strip readout electrically independent from each other in one chamber. It allows us to process high multiplicity events.
Study of the GEM detector performance in BM@N experiment
EPJ Web of Conferences, 2018
BM@N is the fixed target experiment at the accelerator complex NICA-Nuclotron aimed to study nuclear matter in the relativistic heavy ion collisions. Triple-GEM detectors were identified as appropriate for the BM@N tracking system located inside the analyzing magnet. Seven GEM chambers are integrated into the BM@N experimental setup and data acquisition system. GEM construction, main characteristics and first obtained results of the GEM tracking system performance in the technical run with the deuteron beam are shortly reviewed.
Triple GEM Tracking Detectors for the BM@N Experiment
KnE Energy, 2018
BM@N (Baryonic Matter at the Nuclotron) is the fixed target experiment aimed to study nuclear matter in the relativistic heavy ion collisions at the Nuclotron accelerator in JINR. The BM@N tracking system is based on Gas Electron Multipliers (GEM) detectors, mounted inside the BM@N analyzing magnet. The structure of the GEM detectors and the results of study of their characteristics are presented. The GEM detectors are integrated into the BM@N experimental setup and data acquisition system. The results of the first test of the GEM tracking system in the technical run with the deuteron beam are shortly reviewed.
Performance of a large size triple GEM detector at high particle rate for the CBM Experiment at FAIR
Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
In CBM Experiment at FAIR, dimuons will be detected by a Muon Chamber (MUCH) consisting of segmented absorbers of varying widths and tracking chambers sandwiched between the absorber-pairs. In this fixed target heavy-ion collision experiment, operating at highest interaction rate of 10 MHz for Au + Au collision, after the first MUCH detector station in its inner radial ring will face a particle rate of 1 MHz/cm 2. To operate at such a high particle density, GEM technology based detectors have been selected for the first two stations of MUCH. We have reported earlier the performance of several small-size GEM detector prototypes built at VECC for use in MUCH. In this work, we report on a large GEM chamber prototype tested with proton beam of momentum 2.36 GeV/c at COSY-Jüelich Germany. The detector was read out using nXYTER ASIC operated in self-triggering mode. An efficiency higher than 96% at ∆V GEM = 375.2 V was achieved. The variation of efficiency with the rate of incoming protons has been found to vary within 2% when tested up to a maximum rate of 2.8 MHz/cm 2. The gain was found to be stable at high particle rate with a maximum variation of ∼ 9%.
Performance of the BM@N GEM/CSC tracking system at the Nuclotron beam
EPJ Web of Conferences, 2019
BM@N (Baryonic Matter at the Nuclotron) is a fixed target experiment aimed to study nuclear matter in the relativistic heavy-ion collisions at the Nuclotron accelerator in JINR. The BM@N tracking system is based on Gas Electron Multipliers (GEM) detectors mounted inside the BM@N analyzing magnet. The Cathode Strip Chamber (CSC) is installed outside the magnet. The CSC is used for improvement of particles momentum identification. The structure of the GEM detectors and the CSC prototype and the results of study of their characteristics are presented. The GEM detectors and CSC are integrated into the BM@N experimental setup and data acquisition system. The results of first tests of the GEM tracking system and CSC in last runs are shortly reviewed.
Performances of a GEM-based TPC prototype for new high-rate particle experiments
Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 2010
Time projection chamber (TPC) has been successfully used as a central tracker and a particle identification device in a number of a high-energy physics experiments. However, the performance requirements on TPC for new high-rate particle experiments greatly exceed the abilities of traditional TPC readout by multi-wire proportional chamber (MWPC). Gas Electron Multiplier (GEM) detector has great potential to improve TPC performances when used as amplification device. In this paper we present the R&D activity on a new GEM-based TPC (TPG) detector for the inner part of the AMADEUS experiment, a new experimental proposal at DAFNE accelerator at LNF, aiming to perform measurements of the low-energy negative kaons interactions in nuclei. In order to evaluate the TPG feasibility, a 10 Â 10 cm 2 prototype with a drift length up to 15 cm are designed. The performances of a 10 Â 10 cm 2 pre-existing prototype with a reduced drift gap, operated with Ar=CO 2 =CF 4 (45/15/40) gas mixture and successfully tested at BTF facility, are presented. The gas mixture properties, such as the electron drift velocity and the diffusion, have been measured and they result comparable with those simulated with Garfield. A good resolution along the beam direction (z-coordinate), sufficient for a more large scale TPG in AMADEUS, is achieved.
Beam tests of the gas electron multiplier
Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 1999
We describe the results of systematic measurements, carried out with single and double GEM detectors with printed circuit read-out and having an active area of 10x10 cm 2 , both in the laboratory and in a high energy charged particles beam at CERN. Using fast analogue readout electronics, we demonstrate efficiencies for minimum ionizing particles close to 100%, with typical signal/noise ratios above 50 and up to 10 3 for the single and double GEM configuration, respectively, and a time resolution of 15 ns fwhm. Localization accuracies around 40 µm rms have been obtained for perpendicular tracks, degrading to 200 µm at 20° of incidence to the normal. Operated in a non-flammable gas mixture (argon-carbon dioxide), GEM detectors are robust, light and cheap to manufacture, and offer excellent performances and reliability suited for use in the harsh environments met at high luminosity colliders.
To cite this article: Rittirong, A. & Saenboonruang, K. (2018). Gains, uniformity and signal sharing in XY readouts of the 10 cm × 10 cm gas electron multiplier (GEM) detector. ABSTRACT: The gas electron multiplier (GEM) detector is a promising particle and radiation detector which has been greatly improved from previous gas detectors. In particular, the 10 cm × 10 cm GEM detector is utilised in applications including high-resolution tracking devices in nuclear and particle physics. With its operational and design simplicity, while still maintaining high quality, the GEM detector is suitable for both start-up and advanced research. This article reports simple procedures and results of an investigation of important properties of this detector, using current measurement and signal counting. Results show that gains of the GEM detector increase exponentially as voltages supplied to the detector increase and that the detector reaches full efficiency when the voltages are greater than −4100 V. In terms of signal sharing between X and Y strips of the read-out, the X strips, on the top layer of the read-out, collect larger signals. For the uniformity test, the GEM detector has slightly higher efficiencies at the centre of the detector. These results can be used for future reference and for better understanding of the GEM detector's characteristics.
Fast triggering of high-rate charged particles with a triple-GEM detector
Nuclear Instruments & Methods in Physics Research Section A-accelerators Spectrometers Detectors and Associated Equipment, 2004
A 3 year long R&D activity on triple gas electron multiplier (GEM) detectors is reported. This activity was made in the framework of the LHCb experiment in order to find the technology to instrument the central region of the first muon station (M1R1) where a high particle rate is expected. Detector geometry, gas mixture and electric field configuration have been optimized in order to achieve the performance required by the experiment. The use of a very fast, CF 4 based, gas mixture provides a time resolution of about 4.5 ns (r.m.s.) with a single chamber with gain less than 10 4 : In addition, an optimized gain sharing between the three GEMs allows to keep the discharge probability per incident hadron below 10 À12 : The average number of firing pads per crossing particle have been found to be lower than 1.2. In a global aging test two detectors were exposed to a dose rate of 16 Gy/h. Each detector integrated about 2 C/cm 2 equivalent to more than 10 years of operation at LHCb. Good aging properties were measured. These results make the triple-GEM detectors a good solution for M1R1 and, in general, for a fast trigger in the presence of a high rate of charged particles. r
An Overview Of Particle Detectors
In this report we will describe the basic principle of particle detector. We will start by introducing the Gas Ionization Detector(Ionization Chambers,Proportinal Counters,Geiger-Muller Tubes),Photo Multiplier Tube(PMT). Continue to outline the mechanism of Gas Electron Multiplier(GEM) and conclude with the implications of the mechanism and a brief summary of the attempts tomeasure its effects.Here, we have tried to compare (quite extensively) some attributes of other detectors( Gaseous Detector,PMT,MWPC) and GEMs, Which is manufactured by quite different processes.
Loading Preview
Sorry, preview is currently unavailable. You can download the paper by clicking the button above.