A 4 V, ns-range pulse generator for the test of Cherenkov Telescopes readout electronics



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Antoranz Canales, Pedro and Vegas Azcárate, Ignacio and Miranda Pantoja, José Miguel (2010) A 4 V, ns-range pulse generator for the test of Cherenkov Telescopes readout electronics. Nuclear instruments & methods in physics research. Section A, Accelerators spectrometers detectors and associated equipment, 620 (02-mar). pp. 456-461. ISSN 0168-9002

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Official URL: http://dx.doi.org/10.1016/j.nima.2010.03.113


We present in this paper the design, fabrication and verification of a us-range pulse generator based on a Step Recovery Diode (SRD). This device needs only a 5 V DC power supply, delivers 1 ns pulses with peak amplitudes in excess of 4 V and features state of the art jitter figures. In addition, the pulser contains a trigger channel. The long standing problem of the SRD simulation via circuital analysis is addressed. It is shown that the dynamic properties of the Step Recovery Diode can accurately be reproduced via a small signal circuital simulation for the rise times needed in a ns-range pulser. It is also demonstrated that strong inaccuracies in the pulse shape prediction are obtained if the wave propagation through the lines typically used in this type of circuits is simulated by a simple Transverse Electromagnetic Mode (TEM) line model. Instead, it is necessary to account for non-TEM effects. By means of broadband resistive power splitters and high dynamic range amplifiers, a prototype of 4 channels was also fabricated. This prototype is particularly useful for testing the readout electronics of Cherenkov Telescopes, but additional applications to other large-scale experiments are expected, any of those where calibration or verification with compact us-range pulsers featuring low jitter, large dynamic ranges and multichannel operation is needed. In addition, the fabrication cost of this pulser is almost negligible as compared with bulky, commercially available waveform generators, which rarely deliver ns pulses in excess of 3 V. Furthermore, the small size of the pulser presented here and its low power consumption allow an easy integration into more complex systems. (C) 2010 Elsevier B.V. All rights reserved.

Item Type:Article
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© 2010 Elsevier B.V

Uncontrolled Keywords:Magic Telescope, Optical-Fibers, Signal.
Subjects:Sciences > Physics > Electronics
Sciences > Physics > Electricity
ID Code:22244
Deposited On:24 Jul 2013 09:34
Last Modified:10 Dec 2018 14:58

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