PHYS 3446 LECTURE NOTES (9 pages)

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PHYS 3446 LECTURE NOTES



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PHYS 3446 LECTURE NOTES

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Pages:
9
School:
University of Texas at Arlington
Course:
Phys 3446 - Nuclear and Particle Physics
Nuclear and Particle Physics Documents

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PHYS 3446 Lecture 14 Wednesday Oct 27 2010 Dr Andrew Brandt Test Review Particle Detection Ionization detectors Wednesday Oct 27 2010 PHYS 3446 Fall 2010 Andrew Brandt 1 HW6 CH 6 problems 1 2 3 4 7 9 Due Monday 11 1 Wednesday Oct 27 2010 PHYS 3446 Fall 2010 Andrew Brandt 2 Project Subjects Quark Gluon Plasma RHIC Higgs Boson Theory Higgs Boson Searches at LEP Higgs Boson Searches at DZero Higgs Boson Searches at CMS Beyond the Standard Model Higgs rumors and CDF search Supersymmetry or Blackhole Searches at ATLAS Solar Neutrino Deficit Long baseline neutrino experiments neutrino mass G 2 experiments HERA experiments diffraction large rapidity gaps Wednesday Oct 27 2010 PHYS 3446 Fall 2010 Andrew Brandt 3 Particle Detection Charged Particle Tracks Scintillating Fiber Silicon Tracking Calorimeter dense B EM Magnet Interaction Point Muon Tracks Energy hadronic electron photon Wire Chambers jet neutrino or any non interacting particle missing transverse momentum Wednesday Oct 27 2010 muon We know x y starting momenta is zero but along the z axis it is not so many of our measurements are in the xy plane or transverse PHYS 3446 Fall 2010 Andrew Brandt 4 Ionization Detectors Measure the ionization produced when particles traverse a medium Can be used to Track charged particles path through the medium Measure the energy loss dE dx of the incident particle Must prevent re combination of an ion and electron pair into an atom after the ionization Apply high electric field across medium Separates charges and accelerates electrons Wednesday Oct 27 2010 PHYS 3446 Fall 2010 Andrew Brandt 5 Ionization Detectors Chamber Structure Basic ionization detector consist of A chamber with an easily ionizable medium The medium must be chemically stable and should not absorb ionization electrons Should have low ionization potential I To maximize the amount of ionization produced per given energy A cathode and an anode held at some large potential difference The device is characterized by a



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