Trigger response and event data characteristics from the Glast Balloon Prototype

Details Trigger response and event data characteristics from the Glast Balloon Prototype Trigger response and event data characteristics from the Glast Balloon Prototype

Apr 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002aps..aprb17049l&link_type=abstract

American Physical Society, April Meeting, Jointly Sponsored with the High Energy Astrophysics Division (HEAD) of the American As

Astronomy and Astrophysics

Astrophysics

Scientific paper

We report on the successful flight in August 2001 of the Glast Balloon Flight Engineering Model (BFEM) which represents one of 16 tower modules comprising the Glast observatory scheduled for launched in 2006. Prototype flight preamp, discriminator, trigger, and readout electronics functioned as expected, taking events at 1.2 kHz in the Pfotzer maximum (well below the 10 kHz peak/6 kHz sustained data acquisition limit), and settling to 500 Hz at the target float altitude (38 km, or 4 g/cm^2). We summarize the BFEM detector characteristics and flight configuration, and then examine the behavior of the particle tracker layer Fast-Or primitives used to develop the 3-plane coincidence event trigger, as well as the segmented anti-coincidence tile phototube signals used for cosmic ray background rejection. In addition, since initial post-flight data analysis was performed on sub-sampled event sets received from the balloon over the radio link during the flight rather than the full-rate event sets recently recovered from the onboard disks, we present spot comparisons between two corresponding respective data sets to establish equivalence of results.

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