Bulletin of the American Physical Society
2006 APS April Meeting
Saturday–Tuesday, April 22–25, 2006; Dallas, TX
Session W13: Particle Physics Instrumentation |
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Sponsoring Units: DPF Chair: Stephen Magill, Argonne National Laboratory Room: Hyatt Regency Dallas Cumberland G |
Tuesday, April 25, 2006 10:45AM - 10:57AM |
W13.00001: The upgrade of BABAR Muon Detector Jinlong Zhang The muon system is critical for the long-term BaBar physics program. The original muon detector using the Resistive Plate Chambers (RPCs) has been degrading rapidly. In 2002 the Limited Streamer Tube (LST) technology was chosen for the upgrade of the barrel part of the muon detector. The design, production, quality control (QC) and installation of the LSTs will be discussed. The gas system, high voltage system and the readout system of the LST detector will be described. The data taking experience with the partially installed LST system in 2005 will be presented in several aspects such as the detector performance and the impact on physics. [Preview Abstract] |
Tuesday, April 25, 2006 10:57AM - 11:09AM |
W13.00002: QUARTIC: A Fast Time-of-flight Counter Pedro Duarte We present preliminary studies of a fast time-of-flight counter. This counter makes use of the Cerenkov effect to provide precise timing (10 to 30 psec scale) for protons scattered at small angles. One application is a proposed upgrade to the ATLAS and CMS detectors (FP420) that adds proton taggers 420 m upstream and downstream of the central detectors. Fast time-of-flight counters could be used to dramatically decrease backgrounds to events with a massive central system and forward/backward protons, by using timing to confirm that the protons originate from the same event vertex as the central system. [Preview Abstract] |
Tuesday, April 25, 2006 11:09AM - 11:21AM |
W13.00003: 3D Track Triggering at CDF Brandon Parks In order to account for increased luminosity in the Tevatron at Fermilab, an upgrade of the Level 1 tracking system at CDF is necessary. The CDF detector utilizes a Central Outer Tracker (COT), which consists of 96 layers of wires arranged in 8 superlayers that provide information on the momentum and trajectory of charged particles created in collisions between protons and anti-protons. The COT alternates between axial superlayers which provide tracking information only in directions transverse to the beam-line and stereo superlayers that also provide tracking information parallel to the beam-line. The eXtremely Fast Tracker (XFT) is responsible for Level 1 track finding, and is currently only using axial data to reconstruct tracks at CDF. The XFT upgrade involves the addition of the Stereo Linker Association Module (SLAM). The SLAM will utilize the previously existing XFT setup as well as information from the stereo superlayers in the COT to identify useful 3-dimensional tracks. I will give an overview of the hardware configuration and describe the SLAM pattern recognition algorithms. [Preview Abstract] |
Tuesday, April 25, 2006 11:21AM - 11:33AM |
W13.00004: CMS Forward Pixels Assembly and Quality Control Artur Apresyan, Gino Bolla, Daniela Bortoletto, Petra Merkel, Ian Shipsey The CMS pixel detector at the LHC will consist of two barrel layers and two end disks in the forward and backward direction. The end disks contain $\sim$800 silicon detector modules called plaquettes for a total of $\sim$18 million 100 $\times$ 150 $\mu$m pixels. Each plaquette is composed of a silicon sensor bump-bonded to custom-made readout electronics mounted on a high density interconnect. We present the automated procedures developed for assembly quality control which are sensitive to missing bump-bonds. We also discuss the module performance optimization, such as the threshold equalization among all pixels on a chip, which is necessary for physics data taking. [Preview Abstract] |
Tuesday, April 25, 2006 11:33AM - 11:45AM |
W13.00005: Production and Testing of the CMS Silicon Tracker Outer Barrel Timour Ten, E. Shabalina, C.E. Gerber USCMS Silicon tracker group at FNAL is assembling and testing 50\% of the Silicon Tracker Outer Barrel modules. We describe module production and testing procedures. We discuss in detail the long-term module test stand that has been operating at Fermilab since Fall 2004. The readout system of the stand is similar in design to the Data Acquisition chain of the actual detector. The test setup runs thermal cycles between $+40^{\circ}$C and $-40^{\circ}$C, providing testing conditions close to the CMS operating environment. We summarize the results of the Long Term testing of more than 1700 modules. [Preview Abstract] |
Tuesday, April 25, 2006 11:45AM - 11:57AM |
W13.00006: Construction and Testing of Rods for the Tracker Outer Barrel of the CMS Detector Puneeth Kalavase The tracking system of the CMS detector at the Large Hadron Collider (LHC) consists of pixels around the beampipe and silicon strips at larger radii. This constitutes an application of silicon strips detectors on an unprecedented scale. The components of the outer barrel (TOB) portion of this detector are being assenbled at Fermilab and UC Santa Barbara. In this talk we will discuss the assembly and testing of the TOB-``rods", the basic self- contained structures of the TOB. [Preview Abstract] |
Tuesday, April 25, 2006 11:57AM - 12:09PM |
W13.00007: Status of the Endcap Muon System for the Compact Muon Solenoid Experiment Khristian Kotov Presented are the design and status of the Endcap Muon System of the Compact Muon Solenoid (CMS) detector under construction for the Large Hadron Collider, a 14 TeV proton-proton collider. The CMS Endcap Muon System consists of 468 Cathode Strip Chambers with a total sensitive area of 6000 square meters, and it provides a spatial resolution of 100 microns per track in a six-plane chamber. The system provides muon identification, momentum measurement, and a Level- 1 trigger. It is currently fully installed, and cosmic-ray data is being recorded at CERN. [Preview Abstract] |
Tuesday, April 25, 2006 12:09PM - 12:21PM |
W13.00008: Status and Design of CMS Level 1 Trigger System Sang-Joon Lee We present the design and status of the Level 1 trigger system for the Compact Muon Solenoid (CMS) detector at the Large Hadron Collider (LHC). The CMS Level 1 trigger system contains a Calorimeter Trigger, a Muon Trigger and a Global Trigger. Its purpose is to reduce the event rate from the 40 MHz crossing rate to a maximum output rate of 30 kHz. This maximum rate is estimated by appling a conservative safety margin to the maximum input rate tolerable to the higher level trigger system (100 kHz). [Preview Abstract] |
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