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Title: Non cross talk multi-channel photomultiplier using guided electron multipliers

An improved multi-channel electron multiplier is provided that exhibits zero cross-talk and high rate operation. Resistive material input and output masks are employed to control divergence of electrons. Electron multiplication takes place in closed channels. Several embodiments are provided for these channels including a continuous resistive emissive multiplier and a discrete resistive multiplier with discrete dynode chains interspaced with resistive layers-masks. Both basic embodiments provide high gain multiplication of electrons without accumulating surface charges while containing electrons to their proper channels to eliminate cross-talk. The invention can be for example applied to improve the performance of ion mass spectrometers, positron emission tomography devices, in DNA sequencing and other beta radiography applications and in many applications in particle physics.
Inventors:
 [1];  [2];  [2]
  1. (Newport News, VA)
  2. (Grafton, VA)
Issue Date:
OSTI Identifier:
870086
Assignee:
Southeastern Universities Research Assn., Inc. (Newport News, VA) TJNAF
Patent Number(s):
US 5453609
Contract Number:
AC05-84ER40150
Research Org:
SOUTHEASTERN UNIV RESCH ASSN
Country of Publication:
United States
Language:
English
Subject:
talk; multi-channel; photomultiplier; guided; electron; multipliers; improved; multiplier; provided; exhibits; zero; cross-talk; rate; operation; resistive; material; input; output; masks; employed; control; divergence; electrons; multiplication; takes; closed; channels; embodiments; including; continuous; emissive; discrete; dynode; chains; interspaced; layers-masks; basic; provide; accumulating; surface; charges; containing; proper; eliminate; example; applied; improve; performance; mass; spectrometers; positron; emission; tomography; devices; dna; sequencing; beta; radiography; applications; particle; physics; resistive material; surface charge; mass spectrometers; mass spectrometer; dna sequencing; emission tomography; positron emission; rate operation; surface charges; electron multipliers; electron multiplier; resistive layer; resistive layers; /250/