Bulletin of the American Physical Society
APS April Meeting 2016
Volume 61, Number 6
Saturday–Tuesday, April 16–19, 2016; Salt Lake City, Utah
Session E17: LHC Instrumentation I |
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Sponsoring Units: DPF Chair: Mike Tuts, Columbia University, Nevis Laboratory Room: 251E |
Saturday, April 16, 2016 3:30PM - 3:42PM |
E17.00001: Assembly and test of the modules for the CMS Forward Pixel Phase 1 Upgrade Jose Monroy The phase 1 upgrade of the CMS pixel detector will replace the existing pixel detector at the end of 2016 in an extended technical stop. The phase 1 upgrade includes four barrel layers and three forward disks, providing robust tracking and vertexing for LHC luminosities up to $2.5 x 10^{34} cm^{-2} s^{-1}$. The upgrade incorporates new readout chips and front-end electronics for higher data rates, DC-DC powering, and dual-phase $CO_2$ cooling to achieve performance exceeding that of the present detector with a lower material budget. The design of the forward detector is presented along with present status of module assembly and qualification. The procedures used during the module assembly are discussed in detail. [Preview Abstract] |
Saturday, April 16, 2016 3:42PM - 3:54PM |
E17.00002: Automated procedures for the assembly of the CMS Phase 1 upgrade pixel modules Alex Wade The Phase 1 upgrade of the pixel tracker for the CMS experiment requires the assembly of approximately 1000 modules consisting of pixel sensors bump bonded to readout chips. The precision assembly of modules in this volume is made possible using several robotic processes for dispensing epoxy,positioning of sensor components, automatic wire-bonding and robotic deposition of elastomer for wire bond encapsulation. We will describe the these processes in detail, along with the measurements that quanitfy the quality of assembled modules, and describe the subsequent steps in which the sensor modules are used in the construction of the Phase 1 pixel tracker. [Preview Abstract] |
Saturday, April 16, 2016 3:54PM - 4:06PM |
E17.00003: Service cylinder electronics for the CMS Forward Pixel Phase 1 Upgrade Suleyman Durgut The Phase 1 upgrade of the CMS forward pixel detector includes three disks on each side of the interaction point containing a total of 672 modules for a total of about 45 million pixels. A description will be given of the readout, powering, and control chain electronics that are located in the service cylinders outside of the acceptance of the CMS tracker. The status of the production of all the electronics components of the forward pixel service cylinders will be discussed along with the description of the tests performed for quality assurance purposes. [Preview Abstract] |
Saturday, April 16, 2016 4:06PM - 4:18PM |
E17.00004: Tests of CMS Phase 1 Pixel Upgrade Back-End Electronics Matthew Kilpatrick The CMS detector will be upgraded so that it can handle the higher instantaneous luminosity of the 13-14 TeV collisions. The Phase 1 Pixel detector will experience a higher density of particle interactions requiring new front-end and read-out electronics. A front-end pixel data emulator was developed to validate the back-end readout electronics prior to installation and operation. A FPGA-based design emulates 400 Mbps data patterns from the front-end read-out chips and will be used to confirm that each Front End Driver (FED) can correctly decode and process the expected data patterns and error conditions. A FED test bench using the emulator can produce LHC-like conditions for stress testing FED hardware, firmware and online software. The design of the emulator and initial test results will be reported. [Preview Abstract] |
Saturday, April 16, 2016 4:18PM - 4:30PM |
E17.00005: CMS Run-2 Instrumentation for beam radiation and luminosity measurement using novel detector technologies Alejandro Gomez Espinosa The higher energy and luminosity for Run 2 at the LHC initiated the development of dedicated technologies for beam radiation monitoring and luminosity measurement. A dedicated pixel luminosity detector measures coincidences in several three layer telescopes of silicon pixel detectors to arrive at a luminosity for each colliding LHC bunch pair. The full pixel data is also read out at a lower rate to reconstruct charged particle tracks for monitoring and beam spot determination. The upgraded fast beam conditions monitor measures the particle flux using 24 two pad single crystalline diamond sensors, equipped with a fast front-end ASIC, produced in 130 nm CMOS technology, for excellent time resolution. A new beam-halo monitor exploits Cerenkov light production in fused quartz crystals to provide direction sensitivity and excellent time resolution to separate incoming and outgoing particles. The back-end electronics of the beam monitoring systems include dedicated modules with high bandwidth digitizers developed in both VME and microTCA standards for per bunch beam measurements and gain monitoring. All sub-detectors have been taking data from the first day of LHC operation in April 2015. Detector performance results from the 2015 LHC Run II will be presented. [Preview Abstract] |
Saturday, April 16, 2016 4:30PM - 4:42PM |
E17.00006: A Highly-Segmented, Radiation Tolerant Shashlik Electromagnetic Calorimeter Christopher Neu A highly-segmented electromagnetic shashlik calorimeter has been designed for high radiation field applications. Tungsten absorber plates are interleaved among scintillator plates; LYSO and CeF$_3$ have been considered for the scintillating medium, and wavelength-shifting fibers are used to transport scintillating light to photodetectors where signal reconstruction begins. Design details, standalone simulation performance predictions and results from testbeams will be discussed. The design was driven by the occupancy and radiation conditions expected in the high-luminosity LHC era, but the calorimeter can be used at other future experiments as well. [Preview Abstract] |
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