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  • Pictured is the Hall C detector for the High Momentum Spectrometer (HMS). Contained in a concrete shield house, this detector is used for particle identification after the beam hits the target and the scattered particles are focused onto this detector . The detector contains several instruments that measure different elements of the particles including: drift chambers, hodoscopes, and gas and lead-glass Cerenkov detectors.

    HMS Detector

  • Online Documentation for Running Hall-C
    (username/password are available from Hall C Counting Room)

  • Click images to see enlarged version or download the zip file.

    E03-008

  • The Hall-C Moller Polarimeter measures the polarization of the electron beam arriving in Hall-C. It does so by observing the rate of production of Moller electrons at 90 degrees in the center of mass when the beam strikes a thin iron target. The outer shell electrons in the iron are polarized parallel (or anti-parallel) to the beam direction by a 4 Tesla magnetic field. The Moller electron production rate differs when the beam and target electron spins are aligned parallel or anti-parallel to one-another. Measurement of this rate difference provides a measure of the beam polarization.

  • “You can’t really describe what it feels like to save someone’s life. You have to depend on others to keep everyone safe, especially when you are in an unstable environment.”

    Brian Hanlon – Security and Services Manager at Jefferson Lab

    U.S. Coast Guard – 1989-1996

    As Brian Hanlon’s teenage eyes skimmed the surf, he took in the large U.S. Coast Guard cutters just off of the shore. Growing up just a block shy from the Florida coast, he heard the stories of the search and rescue missions and was drawn to them.

  • “I have chosen education and good science as my way to serve my country but joining the military was one of the best decisions of my life," said Tadepalli.

    Arun Tadepalli – Hall A/C Postdoc at Jefferson Lab

    Army - 2004-2012

    “You need it? I got it.” This was the motto Arun Tadepalli lived by during his time in the military. Impeccably organized, as a Unit Supply Specialist in the Army, Tadepalli was responsible for ensuring his fellow soldiers had everything they needed to get the job done.

  • Detector Expert Pushes Limits to the Edge of Reality

    When one makes a list of South African sports, it is unlikely that snowboarding would make the cut. However, Jefferson Lab Staff Scientist Mark Macrae Dalton did not let geography stand in the way of pursuing the sport during his years at the University of Witwatersrand, where he earned his undergraduate degree, graduate degree and Ph.D.

  • Agenda for your second day - New Employee International Orientation (foreign nationals only)

    8:00
    New foreign national employees arrives in Support Service Center Lobby

    8:05
    Communications liaison introduced - Language Class Information

    8:15
    Introduction to International Services Staff - Types of Visas

    9:30
    "What to do First," Social Security Numbers

    10:15
    Bank Accounts, Driving, Buying a Car

    11:15
    Tax Information and General Questions