In-beam evaluation of a medium-size Resistive-Plate WELL gaseous particle detector
L. Moleri, F. D. Amaro, L. Arazi, C. D. R. Azevedo, A. Breskin, A. E. C. Coimbra, E. Oliveri, F. A. Pereira, D. Shaked Renous, J. Schaarschmidt, J. M. F. dos Sa… 展开作者
L. Moleri, F. D. Amaro, L. Arazi, C. D. R. Azevedo, A. Breskin, A. E. C. Coimbra, E. Oliveri, F. A. Pereira, D. Shaked Renous, J. Schaarschmidt, J. M. F. dos Santos, J. F. C. A. Veloso, S. Bressler
介绍了一种装备齐全的中型30 $\times$ 30 cm $^2$电阻板阱(RPWELL)探测器的束内评价。它包括一个单元件气体雪崩倍增器,带有Semitron ESD 225电阻板、1 cm $^2$读出焊盘和APV 25/SRS电子器件。类似于以前的结果与小型探测器原型,稳定运行在高检测效率(>98%)和低平均垫多重性(~1.2)记录与150 GeV的μ子和高速率的π介子束,在Ne/(5%CH $_4$),Ar/(5%CH $_4$)和Ar/(7%CO $_2$)。这是实现适用于需要大面积覆盖的应用的鲁棒探测器的重要一步;其中包括数字强子量热法。
英文摘要:
In-beam evaluation of a fully-equipped medium-size 30$\times$30 cm$^2$ Resistive Plate WELL (RPWELL) detector is presented. It consists here of a single element gas-avalanche multiplier with Semitron ESD225 resistive plate, 1 cm$^2$ readout pads and APV25/SRS electronics. Similarly to previous results with small detector prototypes, stable operation at high detection efficiency (>98%) and low average pad multiplicity (~1.2) were recorded with 150 GeV muon and high-rate pion beams, in Ne/(5%CH$_4$), Ar/(5%CH$_4$) and Ar/(7%CO$_2$). This is an important step towards the realization of robust detectors suitable for applications requiring large-area coverage; among them Digital Hadron Calorimetry.
Resistive Plate Chambers for Imaging Calorimetry - the DHCAL
DHCAL,数字强子量热计,是一种基于电阻板室(RPC)的原型量热计。该设计强调的成像能力的检测器,努力优化的应用程序的粒子流算法(PFAs)的强子射流能量在碰撞束环境中的重建量热计。腔室的读出被分割成1 x 1 cm 2的垫,每个以1位(单阈值)分辨率读出。具有大约50万个读出通道的原型在费米实验室和欧洲核子研究中心的测试束中进行了广泛的测试。本报告介绍了从试验梁收集的数据分析的初步结果。
Study of Performance of Bakelite Resistive Plate Chamber (RPC)
电阻板室(RPC)是一种具有良好时间和位置分辨率的气体探测器。VECC参与了本土开发的胶木RPC的研发。在印度开发的酚醛树脂RPC的最大尺寸是100 cm $\times$ 100 cm。本文介绍了胶木样品的测试结果以及在VECC制造的胶木RPC(30 cm $\times$ 30 cm $\times$ 0.2 cm)的宇宙射线测试结果。还讨论了研制大尺寸(240 cm $\times$ 120 cm $\times$ 0.2 cm)酚醛树脂RPC所采取的步骤。
The ALICE Muon IDentifier is composed of 72 single-gap bakelite Resistive Plate Chambers, which have been operational since 2009 in maxi-avalanche mode (discrimination threshold:7 mV without amplification) with a Tetrafluoroethane/Isobutane/Sulfur Hexafluoride gas mixture, undergoing counting rates of the order of tens of Hz/cm^2. In this talk, the long-term performance and stability of the RPC system will be discussed, in terms of efficiency, dark current and dark rate. An assessment of potential signs of ageing observed on the detectors will be presented, together with a summary of the most …
This work has been carried out to simulate a Resistive Plate Chamber and corroborate it with experimental measurements in order to develop a numerical tool for studying the performance of the device for any gas mixture. This will allow us to explore the feasibility of operating these chambers in their avalanche mode within the Iron Calorimeter setup at India-based Neutrino Observatory with any eco-friendly substitute. The simulation has considered a hydrodynamic model of charge transport to emulate the electronic and ionic growths in the device as a function of the applied voltage which determ…
The fast timing MPGD is a micro-pattern gaseous detector conceived for achieving sub-nanosecond time resolution while maintaining the ability to instrument large areas in high-rate environments; applications of such technology are perspected in high-energy physics experiments at future colliders and medical diagnostics with time-of-flight methods. This work shows the systematic studies carried on an FTM prototype on the performance of GEM foils coated with resistive DLC films, whose development is essential for the FTM operation. The resistive foil performance has been tested with several gas …
Detailed tests and analysis of ageing effects of high irradiation dose on Multi-Strip Multi-Gap Resistive Plate Counters based on low resistivity glass electrodes were performed. MSMGRPC efficiency and cluster size before irradiation are measured and compared with their values after irradiation in a high irradiation dose accessed at a multi-purpose irradiation facility of IFIN-HH based on $^{60}$Co source. The composition and properties of the deposited layers on the glass electrodes, studied based on a multitude of analysis methods, i.e. SEM, XPS, foil-ERDA, RBS, AFM and THz-TDS, are presente…
As part of the Compact Muon Solenoid experiment Phase-II upgrade program, new Resistive Plate Chambers will be installed in the forward region. High background conditions are expected in this region during the high-luminosity phase of the Large Hadron Collider, therefore an improved RPC design has been proposed with a new front-end electronics to sustain a higher rate capability and better time resolution. A new technology is used in the front-end electronics resulting in very low achievable thresholds of the order of several fC. Crucial in the design of the improved RPC is the capability of a…
The CMS Resistive Plate Chamber (RPC) system has been certified for 10 years of LHC operation. In the next years, during the High luminosity LHC (HL-LHC) phase, the LHC instantaneous luminosity will increase to a factor five more than the existing LHC luminosity. This will subject the present CMS RPC system to background rates and operating conditions much higher with respect to those for which the detectors have been designed. Those conditions could affect the detector properties and introduce nonrecoverable aging effects. A dedicated longevity test is set up in the CERN Gamma Irradiation Fac…
A numerical model based on Finite Element Method (FEM) has been developed to simulate the electrical properties of RPC utilizing the law of current conservation. It has been used to systematically investigate the effect of the electrical as well as the geometrical parameters of the device components on the potential distribution and field configuration which govern the RPC performance. The numerical model has been validated by comparing the dark current and electric field with those produced by another mathematical model based on surface currents. The efficacy of the present model has been dem…
Numerical qualification of an eco-friendly alternative gas mixture for avalanche mode operation of Resistive Plate Chambers is the soul of this work. To identify the gas mixture, a numerical model developed elsewhere by the authors has been first established by comparing the simulated figure of merits (efficiency and streamer probability) with the experimental data for the gas mixture used in INO-ICAL. Then it has been used to simulate the same properties of a gas mixture based on argon, carbon di-oxide and nitrogen, identified as potential replacement by studying its different properties. Eff…
An experimental setup consisting of 12 layers of glass Resistive Plate Chambers (RPCs) of size 2\,m\,$\times$\,2\,m has been built at IICHEP-Madurai (\ang{9;56;14.5}\,N \ang{78;00;47.9}\,E, on the surface) to study the long term performance and stability of RPCs produced on large scale in Indian industry. This setup has been collecting data triggered by the passage of charged particles. The measurement of the multiplicity of charged particles due to cosmic ray interactions are presented here. Finally, the results are compared with different hadronic models of the CORSIKA simulation.
Discharge quenching mechanism and performance of RPWELL with tunable 3D printed resistive plates, charge evacuation in semiconductive glass RPWELL and discharge quenching for Cryogenic-RWELL over a wide range of resistivity
电阻板室(RPC)μ介子子系统对触发决策的形成和μ介子轨迹参数的重建有重要贡献。RPC响应的模拟是整个CMS Monte Carlo软件的关键部分,直接影响最终的物理结果。一种基于参数化的RPC效率,噪声,集群大小和定时为每个带的算法已经开发。从宇宙和质子-质子碰撞在$\sqrt{s}=7$ TeV的实验数据已被用于确定的参数。已制定了专门的验证程序。模拟和实验数据之间取得了很好的一致性。
The conventional readout method of the RPC detector uses two sets of orthogonal readout strips placed at the both sides of the gas gap to collect signals of opposite polarities to obtain space points. A new readout method utilizing the reflected signals is proposed which only requires one set of readout strips. The reflection readout method utilizes the differences in the arrival time of the direct and reflected signals to determine the hit position. Customized transmission cables are introduced to extend the propagation distance of reflected signals to ensure sufficient separation of the two …
Optimization of spacer and gas distribution inside glass resistive plate chamber (RPC) is reported. Simulation studies demonstrate improvements on the gas flow velocity homogeneity and lower vorticity inside the gas chamber. The optimized spacer configuration (76 spacers) decreases the number of spacers by $24\%$ compared to the original design (100 spacers), thus helps significantly reduce the non-active or low-efficiency area caused by spacers while maintaining similar deformation uniformity of the electrodes. Large area glass RPCs with 1x1 m$^2$ size using two types of spacer configurations…