Speaker
Mr
Dennis Haefner
(Max-Planck-Institute for Physics)
Description
In 2007 a prototype of a new analog Sum-Trigger was installed in the MAGIC I telescope, which allowed to lower the trigger threshold from 55 GeV down to 25 GeV and led to the detection of pulsed Gamma radiation from the Crab pulsar.
To eliminate the need for manual tuning and intensive maintenance demanded by that first prototype, a new setup with fully automatic calibration was designed recently. The key element of the new circuit is a novel, continuously variable analog delay line that enables the temporal equalization of the signals from the camera photo sensors, which is crucial for the reduction of false triggers from background signals.
A further improvement is the much larger trigger area consisting of a fully revised configuration of overlapping summing patches.
The new system will be installed on both telescopes, MAGIC I and II, enabling stereo observation in Sum-Trigger mode. This will significantly improve observation in the very low energy regime of 20 to 100 GeV, which is essential in particular for detailed pulsar studies, as well as the detection of high-redshift AGNs and distant GRB events.
Authors
Mr
Daniele Corti
(INFN Padova)
Mr
Dennis Haefner
(Max-Planck-Institute for Physics)
Mr
Francesco Dazzi
(INFN Padova, University of Udine)
Dr
Thomas Schweizer
(Max-Planck-Institute for Physics)
Co-authors
Dr
Eckart Lorenz
(Max-Planck-Institute for Physics)
Mr
Gianluca Giavitto
(IFAE Barcelona)
Prof.
Masahiro Teshima
(Max-Planck-Institute for Physics)
Dr
Maxim Shayduk
(Max-Planck-Institute for Physics)
Dr
Razmik Mirzoyan
(Max-Planck-Institute for Physics)
