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X-Ray Polarimetry Workshop SLAC, Stanford, California 9-11 February 2004 |
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Beam Test on Astronomical Hard X-ray Polarimeter PoGO
Tsunefumi
Mizuno
Stanford Linear Accelerator Center
mizuno@SLAC.Stanford.EDU
Tsunefumi Mizuno, Tuneyoshi Kamae, Jonny Ng, Hiro Tajima(SLAC), John W. Mitchel, Robert Straitmatter (NASA GSFC), Ricahrd C. Fernholz, Edward Groth (Princeton University), Yasushi Fukazawa (Hiroshima Univ), and PoGO collaboration
We report a beam test result on the prototype of Astronomical Hard X-ray Polarimeter, PoGO (Polarized Gamma-ray Observer). PoGO is a new balloon-borne instrument to measure hard X-ray/soft Gamma-ray from astrophysical objects in 30-200 keV range with unprecedented sensitivity, being developed by an international collaboration among United State, Japan, Sweden and France. It consists of 200-400 plastic scintillators and utilizes the design of well-type phoswich counter, providing us with large area and extremely low background. To examine the performance to measure polarization, we conducted a beam test on PoGO prototype at Advanced Photon Source Facility in Argonne National Laboratory. The detectors consist of seven plastic scintillators and were irradiated by synchrotron beam of 60, 73, and 83 keV. We succeeded in obtaining a clear modulation and reproducing data with Geant4 simulation.
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For more information, contact
Jennifer Formichelli |
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