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Title: Distributed data acquisition system for Pachmarhi array of Cverenkov telescopes
Authors: Upadhya, S. S
Acharya, B. S
Bhat, P. N
Chitnis, V. R
D'Souza, A. I
Francis, P. J
Gothe, K. S
Joshi, S. R
Majumdar, P
Manogaran, M
Nagesh, B. K
Pose, M. S
Purohit, P. N
Rahman, M. A
Rao, K. K
Rao, S. K
Sharma, S. K
Singh, B. B
Stanislaus, A. J
Sudersanan, P. V
Venkatesh Murthy, B. L
Vishwanath, P. R
Keywords: Distributed Data Acquisition System;Atmospheric Cverenkov Technique;Distributed Cverenkov Telescopes;PACT
Issue Date: 2002
Publisher: Astronomical Society of India
Citation: BASI, Vol. 30, No. 1, pp. 411 - 416
Abstract: Pachmarhi Array of Cverenkov Telescopes consists of 25 Telescopes distributed within an area of 8000m2. The array was designed to detect and process faint Cverenkov light flashes that lasts for a few nanoseconds, produced in the atmosphere by celestial VHE ?-rays or cosmic rays. In this experiment, the arrival time and amplitude of fast tiny pulses have to be measured and recorded from each of 175 photo-tubes in a shortest possible time. In view of the complexity of the system, the entire array is divided into 4 sectors. A Distributed Data Acquisition System developed for the purpose consists of independent Sector Data Acquisition Systems and a Master Data Acquisition System. The distributed data acquisition and monitoring system are built using PC's which are networked through LAN. The entire software for DDAS was developed in-house in C language under LINUX environment. Also, most of the hardware barring a few fast digitization modules were designed and fabricated in-house. The design features, implementation strategy as well as the performance of the whole system are discussed.
Appears in Collections:BASI Publications

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