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Integration of Forward Detectors, ZDC, and CASTOR into CMS Experiments

Integration of Forward Detectors, ZDC, and CASTOR into CMS Experiments. Kevin Reynolds Michael Murray, Mentor David d'Enterria, Co-mentor 2006 Michigan REU at CERN. July 28, 2006 REU Status Report II. 1. Review of Project Goals.

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Integration of Forward Detectors, ZDC, and CASTOR into CMS Experiments

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  1. Integration of Forward Detectors, ZDC, and CASTOR into CMS Experiments Kevin Reynolds Michael Murray, Mentor David d'Enterria, Co-mentor 2006 Michigan REU at CERN July 28, 2006 REU Status Report II 1

  2. Review of Project Goals Assist in the integration of forward detectors, ZDC, and CASTOR into CMS experiment Work on layout of electronics for ZDC and modification of existing CMS HF electronics to produce technical triggers for CMS global trigger Assist with beam tests of ZDC and CASTOR and the analysis of the test beam data July 28, 2006 REU Status Report II 2

  3. Integration of the Zero Degree Calorimeter • The main components for the EM and HAD sections (tungsten, PMTs, fibers, frame, etc.) were shipped on Tuesday and Wednesday to the Previssin site • Installation of parts begins this weekend • Readout cables were cut earlier this week and are being delivered by CERN • Beam tests on the ZDC will hopefully begin late Monday or early Tuesday of next week z ZDC2 INTERACTION POINT ZDC1 July 28, 2006 REU Status Report II 3

  4. Electronic Layout for ZDC ZDC PMT QIE HTR DCC RU CPU • Photomultipler Tube (PMT) • Converts photons to electrons via photoelectric effect • Electrons drawn across HV • Cascade of electrons produced from collisions with dynodes • Charge Integrator and Encoder (QIE) • Accepts analog signal (parallel) • Converts analog to digital • Sends out digitized signal through optical fibers (serial) • Hadronic Trigger Region (HTR) • Accepts digital signal • Calculates deposited energy and time of flight • Decides which events to save • Data Concentrator Card (DCC) • Packs data from events • Readout Unit (RU) • Unpacks data so that events can be triggered and read z July 28, 2006 REU Status Report II 4

  5. Preparation for Beam Tests • Gases to be used in the Cherenkov detectors upstream at the H2 CMS site are N2, CO2, Freon, Helium, and Isobutane. Argon is used in the ZDC wire chambers. As the refraction index of the gas is increases, the emission angle of Cherenkov radiation also increases. Stationary With Respect to Particle v>vt v Index of Refraction θ n>1 cos θc = vt / v = c / (vn) = 1/ (βn) July 28, 2006 REU Status Report II 5

  6. Physics Trivia: Larger Than Life… GIVEN… The Eiffel Tower is approximately 324 meters high!(http://www.tour-eiffel.fr) 324 meters ≈ 354 yards QUESTION If I grew in proportion to the same height as the Eiffel Tower, how much surface area would be covered by the bottom of my shoe? My Height: 76 in Shoe Length: 13 in Shoe Width:4.5 in ANSWER My shoe would cover a total area of 1,281 sq. yds. ~¼ total area of a football field! July 28, 2006 REU Status Report II 6

  7. Acknowledgements • Ford • NSF • University of Michigan • Dr. Homer Neal • Dr. Jean Krisch • Jeremy Herr • Michael Murray, Mentor • David d'Enterria , Co-mentor • Staff at CERN Previssin site July 28, 2006 REU Status Report II 7

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