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TRACER has been calibrated in December 1999 and January 2000 at a
Fermilab test beam.
Fermilab, originally named the National
Accelerator Laboratory, was commissioned by the U.S. Atomic Energy
Commission, under a bill signed by President Lyndon B. Johnson on
November 21, 1967. Founding Director Robert R. Wilson committed the
laboratory to firm principles of scientific excellence, esthetic
beauty, stewardship of the land, fiscal responsibility and equality
of opportunity. Universities Research Association built the
laboratory, and has operated the facility under those principles
since its founding.Fermilab's four-mile Tevatron, the world's
highest-energy particle accelerator, can reach an energy level of
0.980 trillion electron volts (TeV) for each of its particle beams:
clockwise-circulating protons and anticlockwise-circulating
antiprotons.
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Several detectors in the beamline allow to identify particles for the
calibration.
Two plastic scintillation counters (beam paddle) up and down stream
of TRACER identify the beam. The downstream beam paddle forms in
coincidence with the TRACER scintillators (T1 and T2) the main trigger.
Electrons are identified by two Cerenkov counters (Cer1, Cer2)
and a shower counter. The latter, consisting of 3
scintillation counters (SC1, SC2, and SC3) and two layers of
Tungsten (2 radiation lengths per layer).
A scintillation counter behind a shielding concrete and iron beam stop
detects muons.
Two multi wire proportional chambers (TR1, TR2) have been used
in order to test new radiator material to develop new transition
radiation detectors.
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