Bulletin of the American Physical Society
2015 Fall Meeting of the APS Division of Nuclear Physics
Volume 60, Number 13
Wednesday–Saturday, October 28–31, 2015; Santa Fe, New Mexico
Session CD: Mini-Symposium on Micro Pattern Gas Detectors for Nuclear Physics Experiments |
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Chair: Nilanga Liyanage, University of Virginia Room: Sweeney Ballroom C |
Thursday, October 29, 2015 8:30AM - 9:06AM |
CD.00001: Micro Pattern Gas Detectors for Nuclear Physics Experiments Invited Speaker: Kondo Gnanvo Gaseous detectors have played a pivotal role as tracking devices in the field of particle physics experiments for the last fifty years. Nowadays, advances in photolithography and micro processing techniques have enabled the transition from the old generation of multi wire gaseous chamber (MWPCs) to a new family commonly refer to as Micro Pattern Gaseous Detectors (MPGDs). MPGD technologies combine the basic gas amplification principle with micro-structure printed circuits to provide detectors with excellent spatial and time resolution, high rate capability, low material budget and high radiation tolerance. Several technical breakthroughs over the past decade have allowed the possibility for large area MPGDs, making them cost effective and high performance detector candidates for future nuclear physics (NP) and high energy physics (HEP) experiments. We give in the present talk, an overview of the state of the art of the MPGDs. We will then briefly present the CERN-based RD51 collaboration established in 2008 with the goal of further advancing technological developments and applications of MPGDs and associated electronic-readout systems. Finally we report on the rich and diverse R{\&}D activities on MPGDs to prepare for the detector challenges of the next generation of accelerators and for the frontiers of physics research. [Preview Abstract] |
Thursday, October 29, 2015 9:06AM - 9:18AM |
CD.00002: Assembly and Test for the Large GEM detector for pRad experiment at JLab Hall B Xinzhan Bai, Kondo Gnanvo, Huong Nguyen, Vladimir Nelyubin, Yan Huang, Andrew Katzenstein, Yang Zhang, Nilanga Liyanage pRad (proton charge radius) is a novel magnetic-spectrometer-free ep scattering experiment designed to measure the proton charge radius at a very low Q$^2$ region (10$^{-4}$ $\sim$ 10$^{-2}$ (GeV/c)$^2$) at Jefferson Lab Hall B, it needs a high-resolution position detector. We will report the fabrication and test for world-largest GEM detector designed and built for pRad experiment. In this report, we will talk about the assembly process and the testing results for pRad GEM chamber. [Preview Abstract] |
Thursday, October 29, 2015 9:18AM - 9:30AM |
CD.00003: Development of GEMs at Hampton University Anusha Liyanage, Michael Kohl Two GEM telescopes each consisting of three 10x10 cm$^2$ triple-GEM chambers 30-40 $cm$ apart were built, tested and operated by the Hampton group. They are read out with APV25 frontend chips and FPGA based digitizing electronics developed by INFN Rome. The telescopes served as luminosity monitors for the OLYMPUS experiment at DESY in Hamburg, Germany, with positron and electron beams at 2 $GeV$. The telescopes have been recycled to serve as the beam particle tracker of the MUSE experiment at the Paul Scherrer Institute in Switzerland. In the identical configuration as in OLYMPUS, the telescope was limiting the accepted trigger rate in the test measurements. Therefore, an effort is ongoing to improve the GEM readout speed to meet the trigger rate at the design intensity of the MUSE experiment. Further, the Hampton group is responsible for the DarkLight phase-I lepton tracker which is in preparation at the low energy-recovering facility (LERF) at the Thomas Jefferson National Accelerator Facility in Newport News, USA, sponsored by the National Science Foundation through a Major Research Instrumentation (MRI) grant. The group's activities on GEM detector development will be summarized, and the achieved performance and the current effort to further improvements will be discussed. [Preview Abstract] |
Thursday, October 29, 2015 9:30AM - 9:42AM |
CD.00004: ABSTRACT WITHDRAWN |
Thursday, October 29, 2015 9:42AM - 9:54AM |
CD.00005: Gas Electron Multiplier performance under high intensity X-ray radiation Danning Di Large size Gas Electron Multiplier (GEM) for the Super Bigbite Spectrometer (SBS) in Hall A at Thomas Jefferson National Laboratory (JLab) have been built at Detector Lab of University of Virginia(UVa). The Proton Polarimeter Back Tracker of the SBS consist of 40 GEM modules of size 60$\times$50 cm$^{2}$. We report R\&D and quality test of the GEM detectors under high intensity X-ray radiation. Expected background rate in experiment is up to about 500 kHz/cm$^{2}$. Such high background rate requires GEM detectors to have timing resolution of about a few nano seconds and operate stably with high rate activities going on within. X-ray with high rate up to 50 MHz/cm$^{2}$ and energy up to 50 keV was used to test the performance of GEM detectors in detector lab at UVa. Issues caused by high intensity background and detailed R\&D effort to adapt GEM detectors for use in the SBS are described. [Preview Abstract] |
Thursday, October 29, 2015 9:54AM - 10:06AM |
CD.00006: Initial Tests of Commercially Manufactured Large GEM Foils and EIC Triple-GEM Detector Design Amani Kraishan Tracking detectors exist in many different varieties and operate on different physical principles, depending on the type of particle that has to be tracked, on the desired spatial resolution, and on the area that has to be covered. Gas electron multiplier (GEM) detectors, operating on the principle of electron amplification in gases, provide good spatial resolution for charged particles and can be built with large sensitive areas. Currently CERN is the only main distributor of large area GEM foils, and will be hard pressed to keep up with the increasing demand. To help satisfy the GEM foil demand, the commercialization of large area GEM foils via the single mask process has been established by Tech-Etch of Plymouth, MA, USA. Here we present our initial quality assurance tests of the foil's electrical and geometrical properties for sizes up to 40 X 40 cm$^{2}$. Using our electrical and optical measurement setup, we also measured 10 X 10 cm$^{2}$ GEMs produced by CERN and compare it with the Tech-Etch foils. Furthermore, we will present initial R{\&}D design work done toward building a potential triple-GEM tracking detector to be used at a future experiment at an Electron-Ion Collider (EIC) facility. [Preview Abstract] |
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