Method for extracting measuring signals from a multi-channel...

Details Method for extracting measuring signals from a multi-channel... Method for extracting measuring signals from a multi-channel...

2006-08-29

2006-08-29

Allen, Stephone B. (Department: 2878)

Radiant energy

Photocells; circuits and apparatus

Photocell controlled circuit

C250S2140VT, C330S042000, C330S059000, C315S010000

Reexamination Certificate

active

07098434

ABSTRACT:
The invention relates to a method for extracting measuring signals from a multi-channel photomultiplier, characterised by the following steps: a measuring signal which is integral for the channels of the photomultiplier is extracted at the dynode in order to record the signal form and intensity of an event, and the anode signal of each channel is compared with a threshold value. If the threshold value is exceeded at a channel, the location of the detected event is determined and the associated signal form and intensity at the dynode is detected. The invention also relates to a circuit for a multi-channel photomultiplier (1), said circuit being used to carry out the method according to one of the claims1to8. The circuit comprises a photocathode, a multi-channel structure for electron multiplication (dynode), and anodes (11) which are associated with the channels and are used for pixel-oriented charge amplification and collection. The dynode (12) is contacted and a comparator circuit (2) is provided for each channel of the anode (11) in order to extract a measuring signal.

REFERENCES:
patent: 4967084 (1990-10-01), Rich et al.
patent: 5111051 (1992-05-01), Watanabe
patent: 5338937 (1994-08-01), Daghighian et al.
patent: 5401951 (1995-03-01), Butler et al.
patent: 5493111 (1996-02-01), Wheeler et al.
patent: 932 536 (1963-07-01), None
Multi-Channel Readout of Crossed Wire . . . by A.J. Bird et al. (Elsevier Science B.V.—1994).
Multilayer Anode With Crossed Serpentine Delay Lines . . . by P.G. Friedman et al. (Rev. Sci. Feb. 1996).

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