Chicago Projects/Facilities

Simon Swordy - University of Chicago28th 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 includingChicago, Michigan, Indiana, Wash U. UC Irvine)

140 Multi-wireProportional Chambersmeasure energy loss to identify particlespecies.

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-FlightScintillatorstrigger 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 totalenergy ~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