Chicago Projects/Facilities Simon Swordy - University of Chicago 28th January 2009, PEBS meeting CERN.

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Presentation transcript:

Chicago Projects/Facilities Simon Swordy - University of Chicago 28th January 2009, PEBS meeting CERN

First measurement of positrons in cosmic rays (DeShong, Hildebrand and Meyer, 1964) Showed mostly secondary origin

(flew mid-1980s)

HEAT - eplus/minus

HEAT eplus-minus 1994 (Collaboration of ~5 US institutions including Chicago, Michigan, Indiana, Wash U. UC Irvine)

140 Multi-wire Proportional Chambers measure energy loss to identify particle species. Superconducting Magnet Spectrometer with Drift Tube Hodoscope (continuous tracking) measures rigidity. This determines the particle’s charge sign and momentum. 10 kG field MDR extends to ~350 GV 65 m tracking accuracy Time-of-Flight Scintillators trigger data acquisition, measure particle charge and determine direction of travel. 1 METER HEAT pbar

Version for 1997 flight

Prep and Launch of 1997 version, note payload size relative to balloon

Heavy nucleus rings from 1991 flight - note this carbon here has total energy ~12*390 GeV = 4.6TeV. Also note background is easily identifiable

TRACER – high energy composition

Chicago Electronics Shop Large experience in HEP detector systems (CDF, ATLAS, DoubleChooz…etc) New leader (as of early 2008); Jean-Francois Genat from Paris-6/Saclay Already working with DRS4 switched capacitor chip Local balloon program engineer – Casey Smith

CREST Cosmic Ray Electron Synchrotron Telescope (reverse side)

Chicago High Bay CREAM-I TRD in transit in Chicago high bay