[Triumf-seminars] TRIUMF ISAC Seminar today at 10:30

Wed, 21 Apr 2004 05:00:00 -0700

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Date/Time: Wed 2004-04-21 at 10:30

Location:  Auditorium          

Speaker:   Chris Pearson (TRIUMF)

Title:     The UK Gamma-ray tracking project

Abstract: A gamma ray tracking algorithm has been implemented and tested,
using simulated data, for gamma rays with energies between 0.1 and
2 MeV, interacting in a 90 mm long, 60 mm diameter, cylindrical, 36 (6x6) segment detector.

   It was found that for gamma-rays of energies around 1 MeV, a ratio of photopeak counts to total counts of 2:3, using the tracking algorithm  could be obtained, with only a 2% reduction in detection efficiency, compared to the untracked data.  Approximately 80% of first interaction points could be correctly identified, enabling a good Doppler shift
correction.

   Real data was obtained using a detector of the type simulated, together  with a compactPCI digital data acquisition system
comprising 36, 12 bit,  40 MHz flash ADCs, and 6 200 MHz DSPs.  The performance of the tracking algorithm on this real data is
comparable to its performance on simulated data.

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