Back to results
US 5,111,051 AGranted
Multi-anode array photomultiplier tube
AssigneeHamamatsu Photonics K. K.
InventorMitsuo Watanabe
Life of this patent
Estimating the term…
Abstract
A photomultiplier tube has a multi-anode array consisting of a first group of anodes arranged in the Y-direction and a second group of anodes arranged in the X-direction in the form of a plurality of rows. Each of the anodes of the first group for detecting a receiving position of photoelectrons in the Y-direction contains the associated anodes of the second group for detecting the receiving position of photoelectrons in the X-direction so as to form an empty space therebetween.
Claims9
A photomultiplier tube comprising:
- a photocathode for converting incident light into photoelectrons;
- a plurality of means for multiplying the photoelectrons;
- and
- an anode array for collecting the multiplied photoelectrons, the anode array comprising a first group of anodes, arranged in a first direction, for detecting a receiving position of the photoelectrons in the first direction, and a second group of anodes, electrically isolated from each other and arranged in a second direction perpendicular to the first direction in the form of a plurality of rows so as to be associated with the respective anodes of the first group, for detecting the receiving position of the photoelectrons in the second direction simultaneously with the detection in the first direction.
1 more element
A radiation detector comprising:
- a scintillator array comprising a plurality of scintillator crystals, arranged in a first and a second direction perpendicular to each other, for emitting scintillation light in response to an incident radiation;
- a photomultiplier tube comprising:
- a photocathode for converting the scintillation light to photoelectrons;
- a plurality of dynodes for multiplying the photoelectrons;
- and
- an anode array for collecting the multiplied photoelectrons, the anode array comprising a first group of anodes, arranged in said first direction, for detecting a receiving position of the photoelectrons in said first direction, and a second group of anodes, electrically isolated from each other and arranged in said second direction in the form of a plurality of rows so as to be associated with the respective anodes of the first group, for detecting the receiving position of the photoelectrons said second direction, the anode array being arranged so that centers of the anodes substantially coincide with centers of the corresponding scintillator crystals;
- and
- a computing circuit for determining a scintillation position in said first and second directions on the basis of detection data for said first and second directions provided from the photomultiplier tube, a computing operation for said second direction being performed in a parallel manner for sets of the detection data for said first direction which corresponds to the respective anodes of the first group.
5 more elements
Dependencies are inferred from the claim text.