Abstract Details

Name: Anilkumar Tolamatti
Affiliation: BARC, Mumbai.
Conference ID: ASI2017_1251
Title : Characterization of coincidence gate-width of the trigger system for MACE telescope
Authors and Co-Authors : A. Tolamatti, S.S. Sikder, J. Hariharan, K.K. Yadav, A. Behere, K. Venugopal, S. Godambe, N. Mankuzhiyil, K K Singh, A.K. Tickoo, R.C. Rannot.
Abstract Type : Poster
Abstract Category : Instrumentation and Techniques
Abstract : The second largest gamma-ray telescope MACE (Major Atmospheric Cerenkov Experiment) is being installed at Hanle (4270m asl), to explore the gamma-ray sky in the energy region more than 20 GeV. The imaging camera of the telescope comprises 1088 pixels (Photo-Multiplier tubes) covering a total field-of-view of 4.00 x 4.30 with a trigger field-of-view of 2.60 x 3.00. The camera follows a modular design with 16 pixels forming a Camera Integrated Module (CIM). In order to achieve a low energy trigger threshold of around 30 GeV, a two level trigger system has been designed for the telescope. The first level trigger (FLT) is generated within the CIMs based on 4NN close cluster configurations while the second level trigger (SLT) is generated by combining the FLTs from the neighbouring CIMs. We have estimated the SLT coincidence gate-width of the trigger system operating a 4 CIM camera of the MACE telescope under simulated night sky background environment and monitoring the single channel rate and resulting chance coincidence rate. The estimated gate-width is found to be matching with the design specifications. The methodology and the results will be discussed in the meeting.