Photon detector, radiation analyzer, and computer program product
According to an embodiment, a photon detector includes a photoelectric converter, a voltage supplier, a potential variation detector, and an adjustor. The photoelectric converter performs photoelectric conversion based on an incident photon and outputs current corresponding to number of photons. The voltage supplier supplies a voltage to the photoelectric converter. The potential variation detector detects potential variation of a cathode of the photoelectric converter. The adjustor adjusts a potential of an anode of the photoelectric converter based on the potential variation detected by the potential variation detector so that variation in a potential difference between the cathode and the anode of the photoelectric converter is reduced, and outputs current from the photoelectric converter to the outside.
1. A photon detector comprising:
a photoelectric converter performing photoelectric conversion based on an incident photon and output current corresponding to number of photons;
a voltage supplier supplying a voltage to the photoelectric converter;
a potential variation detector detecting potential variation of a cathode of the photoelectric converter; and
an adjustor adjusting a potential of an anode of the photoelectric converter based on the potential variation detected by the potential variation detector so that variation in a potential difference between the cathode and the anode of the photoelectric converter is reduced, and outputting current from the photoelectric converter to the outside.
2. The detector according to claim 1 , wherein the photoelectric converter includes one or more avalanche photodiodes.
3. A radiation analyzer comprising:
a radiation source; and
the photon detector according to claim 2 , wherein
the photon detector detects photons resulting from radiation emitted from the radiation source.
4. A radiation analyzer comprising:
a radiation source; and
a photon detector detects photons resulting from radiation emitted from the radiation source, wherein
the photon detector comprising:
a photoelectric converter performing photoelectric conversion based on an incident photon and output current corresponding to number of photons;
a voltage supplier supplying a voltage to the photoelectric converter;
a potential variation detector detecting potential variation of a cathode of the photoelectric converter; and
an adjustor adjusting a potential of an anode of the photoelectric converter based on the potential variation detected by the potential variation detector so that variation in a potential difference between the cathode and the anode of the photoelectric converter is reduced, and outputting current from the photoelectric converter to the outside.
5. A computer program product comprising a computer-readable medium including programmed instructions that causes a computer to execute:
performing photoelectric conversion based on an incident photon; and
adjusting, when a potential of a cathode of a photoelectric converter outputting current corresponding to number of photons varies, a potential of an anode of the photoelectric converter based on the variation in the potential of the cathode of the photoelectric converter so that variation in a potential difference between the cathode and the anode of the photoelectric converter is reduced, and outputting current output from the photoelectric converter to the outside.