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Design and Characteristics of the Anticoincidence Detector for the GLAST Large Area Telescope (2005)

Moiseev, A. A. ; Johnson, T. E. ; Hartman, R. C. ; [et al.]

In: CASI

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Publication Date: 2019-07-13

Description: The Anti-Coincidence Detector (ACD) is the outermost detector layer in the GLAST Large Area Telescope (LAT), surrounding the top and sides of the tracker. The purpose of the ACD is 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 low sensitivity to backsplash particles. These are products of high- energy interactions in the LAT calorimeter. They can cause a veto signal in the ACD, resulting in loss of good gamma-ray events.

Keywords: Instrumentation and Photography

Type: 29th International Cosmic Ray Conference; Aug 03, 2005 - Aug 10, 2005; Pune; India

Format: application/pdf

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