Jun 13 – 15, 2012
LAL Orsay
Europe/Paris timezone

Design and Characterization of a Micro-Strip RF Anode for Large-Area MCP-based Photodetectors

Jun 15, 2012, 12:10 PM
20m
Amphithéâtre Pierre Lehmann (LAL Orsay)

Amphithéâtre Pierre Lehmann

LAL Orsay

Centre Scientifique d'Orsay - Bat 200 91898 Orsay cedex FRANCE
Oral presentation Electronics

Speaker

Herve Marie Xavier Grabas (CEA - Centre d'Etudes de Saclay (FR))

Description

We describe an inexpensive micro-strip RF anode designed to measure the time and position in large-area MCP-based photo-detectors. The anode has been optimized to match the bandwidth of the intrinsically fast MCPs (risetime < 1ns). The timing, two-dimensional position, and energy of the MCP pulses are extracted by fast waveform digitization at both ends of the anode micro-strips. The anode geometry consists of 30 equidistant, silver microstrips silk-screened on a 20cm-by-20cm, 2.75 mm-thick, Borofloat glass plate. A solid ground plane is referenced on the opposite side of the glass. The anode is measured to have an analog bandwidth of 2 GHz (175 ps risetime), cross-talk coupling between strips of -10dB, and impedance control of the 50-ohm lines of better than 10% over the entire bandwidth. The anode geometry and construction allows for multiple anodes to be connected in series, efficiently increasing the photosensitive area for the same number of electronics channels.

Primary author

Herve Marie Xavier Grabas (CEA - Centre d'Etudes de Saclay (FR))

Presentation materials