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Proportional Counter Quiz

  1. Proportional counters work based on what physical process?


  2. What determines the energy sensitivity of a gas proportional counter?


  3. In low-Earth orbit, the raw background count rates are an order of magnitude less than in interplanetary space.

  4. The timing resolution of a proportional counter experiment aboard a satellite is determined by:



  5. What kind of detectors has so far been the "workhorse" of X-ray astronomy?


Imagine the Universe is a service of the High Energy Astrophysics Science Archive Research Center (HEASARC), Dr. Nicholas White (Director), within the Laboratory for High Energy Astrophysics at NASA's Goddard Space Flight Center.

The Imagine Team
Project Leader: Dr. Jim Lochner
All material on this site has been created and updated between 1997-2004.

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