Bulletin of the American Physical Society
2010 Fall Meeting of the APS Division of Nuclear Physics
Volume 55, Number 14
Tuesday–Saturday, November 2–6, 2010; Santa Fe, New Mexico
Session MF: Elements of Very Large Detectors |
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Chair: William Llope, Rice University Room: Kearney |
Saturday, November 6, 2010 8:30AM - 8:42AM |
MF.00001: Simulation and Physics with the FVTX upgrade for PHENIX at RHIC Zhengyun You The PHENIX detector at RHIC will be upgraded with the Forward Silicon Vertex Detector (FVTX). The FVTX consists of two arms, each with four discs of silicon strip sensors, covering the acceptance of existing muon arm detectors (1.2 $< \quad \vert $y$\vert \quad <$ 2.4). The detector is under construction and will be installed in 2011. The FVTX will greatly enhance the physics capability of PHENIX on forward rapidity. Simulation of the detector performance, the ability of precise heavy quark production measurement, improvement with FVTX for Drell-Yan and W measurements and related physics will be presented. [Preview Abstract] |
Saturday, November 6, 2010 8:42AM - 8:54AM |
MF.00002: Assembly and Testing of the FVTX Detector for PHENIX Aaron Veicht The Forward Vertex Detector (FVTX) is a silicon strip detector upgrade to the PHENIX spectrometer. The FVTX consists of two endcaps, each with four planes, and a pitch of 75 micron in the R direction. The endcaps complement another PHENIX upgrade (the central vertex detector, or VTX), and together FVTX endcaps match the PHENIX forward muon arms, covering the same pseudorapidity (approximately $1.2<\left|\eta\right|<2.4$). When used with the muon tracking system, this detector will allow discrimination between prompt particles, and decay muons from B's, D's, pions and kaons. Production of detector modules has already begun for our 2012 installation, and we will report on the status of assembly, as well as give a brief outline of the testing procedures used during the construction. Bench tests with sources and cosmic ray data will be presented. [Preview Abstract] |
Saturday, November 6, 2010 8:54AM - 9:06AM |
MF.00003: Commissioning the PHENIX Resistive Plate Chamber forward trigger upgrade Michael Daugherity The Relativistic Heavy Ion Collider (RHIC) at Brookhaven National Laboratory is the world's only polarized proton-proton collider. The spin program of polarized collisions at $\sqrt{s}=500$ GeV promises to provide new insight into the spin structure of the proton. To take full advantage of this program, the PHENIX detector is being upgraded to extend trigger capabilities in the forward rapidity region. This upgrade, which includes the installation of several new resistive plate chambers (RPCs) and electronics upgrades, will improve the efficiency of selecting W bosons by roughly a factor of 100. This talk will review the recent commissioning status and performance of RPC detectors with RHIC beam and cosmic ray data. [Preview Abstract] |
Saturday, November 6, 2010 9:06AM - 9:18AM |
MF.00004: RPC Performance Studies for PHENIX at RHIC Daniel Jumper A series of Resistive Plate Chamber detectors will serve as a new fast muon trigger for the PHENIX experiment at the Relativistic Heavy Ion Collider. This trigger will provide greatly increased event selectivity and ultimately allow us to study proton spin structure through W-production. However, to properly use the RPC's and to accurately interpret their data we must understand aspects of their performance such as rate capability and detection efficiency around areas where the gas gap is occupied by a plastic structural support spacer. This presentation will describe work done on these measurements using RPC prototypes in a cosmic test stand at the University of Illinois. It will include discussion on a novel method developed for measuring rate capability using an Fe55 source. The source creates a field of background radiation with spatially dependent strength. When a detector is placed in this field, it is possible to measure efficiency of the detector at a wide range of background rates simultaneously. Using this method, rate capabilities can be easily and quickly determined for various detector voltage settings. [Preview Abstract] |
Saturday, November 6, 2010 9:18AM - 9:30AM |
MF.00005: Resistive Plate Chamber Upgrade for the PHENIX Muon Arm Trigger Rusty Towell Many significant questions remain to be answered about the origin of the proton spin. A new fast Resistive Plate Chamber (RPC) based trigger system is being developed for the PHENIX muon spectrometer arms that will allow for the first time the measurement of the flavor structure of the quark polarization in the proton through the observations of W-bosons in polarized proton-proton collisions at the Relativistic Heavy Ion Collider (RHIC) at Brookhaven National Laboratory (BNL). The new PHENIX Muon Trigger will improve the efficiency by which the data acquisition system can identify potential W events by approximately two orders of magnitude. W-bosons can be detected through the appearance of a high-energy muon in one of the two existing muon spectrometers. The trigger upgrade is based on new front-end electronics for the muon tracking chambers and RPCs that will be installed in two stations of both muon arms. Measurements possible in the next RHIC run will be reviewed and the current production status and quality control of RPCs in the production factory will be presented. [Preview Abstract] |
Saturday, November 6, 2010 9:30AM - 9:42AM |
MF.00006: PHENIX Silicon Stripixel Detector at RHIC Swadhin Taneja A novel design for a silicon sensor consisting of ``spirals'' of silicon strip-pixel was developed at the Brookhaven National Laboratory. This strip-pixel silicon sensor is a single-sided, DC-coupled, two-dimensional detector. A silicon vertex tracker (VTX) is now under construction and will be installed at PHENIX in fall 2010. The strip-pixel ladders will form the two outer barrels of the VTX. The VTX will substantially enhance the physics capabilities of the PHENIX central arm spectrometer and will enable precision measurements of heavy-quark production (charm and beauty) in A + A, p(d) + A, and polarized p + p collisions. In this talk I will focus on the silicon modules and the ladder assembly. I will show the performance results of the ladders. [Preview Abstract] |
Saturday, November 6, 2010 9:42AM - 9:54AM |
MF.00007: The ALICE ITS Alignment monitoring System, Status and pre-data taking results Bjorn Nilsen, Mike Cherney, Jiro Fujita, Jiri Kral, Thomas Humanic, David Truesdale The ALICE detector, at the CERN LHC facility, is a large detector system using a large number of different detector technologies. Two of these systems, the Time Projection Chamber and the Inner Tracking System need to have their relative positions well known for optimal performance. This monitoring system will be described. Before the first LHC Collisions, a number of measurements were taken with different setting of the ALICE magnet systems. Results from the ALICE ITS Alignment monitoring system's performance will be shown. [Preview Abstract] |
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