NASA Logo

NTRS

NTRS - NASA Technical Reports Server

Collections About News Help Login
Back to Results
Performance of the Anti-Coincidence Detector on the GLAST Large Area TelescopeThe Anti-Coincidence Detector (ACD), the outermost detector layer in the Gamma-ray Large Area Space Telescope (GLAST) Large Area Telescope (LAT), is designed to detect and veto incident cosmic ray charged particles, which outnumber cosmic gamma rays by 3-4 orders of magnitude. The challenge in ACD design is that it must have high (0.9997) detection efficiency for singly-charged relativistic particles, but must also have a low probability for self-veto of high-energy gammas by backplash radiation from interactions in the LAT calorimeter. Simulations and tests demonstrate that the ACD meete its design requirements. The performance of the ACD has remained stable thrugh stand-alone environmental testing, shipment across the U.S. installation onto the LAT, shipment back across the U.S., LAT environmental testing, and shipment to Arizona. As part of the fully-assembled GLAST observatory, the ACD is being readied for final testing before launch.
Document ID
20070032631
Acquisition Source
Goddard Space Flight Center
Document Type
Conference Paper
External Source(s)
doi:10.1063/1.2757465
Authors
Thompson, D. J. (NASA Goddard Space Flight Center Greenbelt, MD, United States)
Charles, E. (Stanford Linear Accelerator Center Menlo Park, CA, United States)
Hartman, R. C. (NASA Goddard Space Flight Center Greenbelt, MD, United States)
Moiseev, A. A. (NASA Goddard Space Flight Center Greenbelt, MD, United States)
Ormes, J. F. (NASA Goddard Space Flight Center Greenbelt, MD, United States)
Date Acquired
August 23, 2013
Publication Date
July 12, 2007
Publication Information
Publication: AIP Conference Proceedings (The First GLAST Symposium)
Publisher: American Inst. of Physics
Volume: 921
ISSN: 0094-243X
Subject Category
Astronomy
Distribution Limits
Public
Copyright
Public Use Permitted.

Related Records

There are no records associated with this record.
No Preview Available