Radiation analyzing apparatus

Patent metadata

Field	Value
Publication number	US-9678227-B2
Application number	US-201614994195-A
Country	US
Kind code	B2
Filing date	Jan 13, 2016
Priority date	Jan 20, 2015
Publication date	Jun 13, 2017
Grant date	Jun 13, 2017

Abstract

A superconductive transition edge sensor detects radiation. A wave height analyzer generates an energy spectrum of radiation using a detection signal which is output from the superconductive transition edge sensor. A temperature control section and a base line monitor mechanism acquire a physical quantity of data having correlation with detection sensitivity of the superconductive transition edge sensor. A sensitivity correction arithmetic operation unit associates the physical quantity of a plurality of pieces of the acquired data at a plurality of different timings over a predetermined period of time with the detection signal at a certain timing and corrects the detection signal at the certain timing in accordance with the detection sensitivity of the superconductive transition edge sensor by using information regarding the correlation between the physical quantity of the plurality of pieces of data and the detection sensitivity of the superconductive transition edge sensor.

First claim

What is claimed is:

1. A radiation analyzing apparatus comprising:
a superconductive transition edge sensor configured to detect radiation;
a spectrum generation unit configured to generate an energy spectrum of the radiation using a detection signal which is output from the superconductive transition edge sensor;
a data acquisition unit configured to acquire a physical quantity of data having correlation with detection sensitivity of the superconductive transition edge sensor; and
a sensitivity correction unit configured to associate the detection signal output from the superconductive transition edge sensor at a certain timing with the physical quantity of a plurality of pieces of data acquired by the data acquisition unit at a plurality of different timings over a predetermined period of time and to correct the detection signal output at said certain timing in accordance with the detection sensitivity of the superconductive transition edge sensor by using information regarding correlation between the physical quantity of the plurality of pieces of data and the detection sensitivity of the superconductive transition edge sensor,
wherein the sensitivity correction unit is configured to correct the detection signal at said certain timing in accordance with the detection sensitivity of the superconductive transition edge sensor by using the information regarding correlation between average value of the physical quantity of the plurality of pieces of data and the detection sensitivity of the superconductive transition edge sensor.

2. The radiation analyzing apparatus according to claim 1 ,
wherein the data acquisition unit is configured to add time information to the physical quantity of data, the time information regarding a timing at which each of the physical quantity of the plurality of pieces of data is acquired, and
wherein the sensitivity correction unit corrects the detection sensitivity of the superconductive transition edge sensor by using the time information added to each of the physical quantity of the plurality of pieces of data.

3. The radiation analyzing apparatus according to claim 1 , wherein the data acquisition unit acquires an output of a heater that heats the superconductive transition edge sensor as the physical quantity.

4. The radiation analyzing apparatus according to claim 1 , wherein the data acquisition unit acquires a current flowing to the superconductive transition edge sensor as the physical quantity.

5. A radiation analyzing apparatus comprising:
a superconductive transition edge sensor configured to detect radiation;
a spectrum generation unit configured to generate an energy spectrum of the radiation using a detection signal which is output from the superconductive transition edge sensor;
a heater that heats the superconductive transition edge sensor;
a current source that flows current through the superconductive transition edge sensor;
a data acquisition unit configured to acquire a physical quantity of data, including pieces of data representing the output of the heater and pieces of data representing the current flowing through the superconductive transition edge sensor, having correlation with detection sensitivity of the superconductive transition edge sensor; and
a sensitivity correction unit configured to associate the detection signal output from the superconductive transition edge sensor at a certain timing with the physical quantity of a plurality of pieces of data representing the output of the heater and the current flowing through the semiconductive transition edge sensor acquired by the data acquisition unit at a plurality of different timings over a predetermined period of time and to correct the detection signal output at said certain timing in accordance with the detection sensitivity of the superconductive transition edge sensor by using information regarding correlation between the physical quantity of the plurality of pieces of data and the detection sensitivity of the superconductive transition edge sensor.

6. The radiation analyzing apparatus according to claim 5 , wherein the sensitivity correction unit is configured to correct the detection signal at said certain timing in accordance with the detection sensitivity of the superconductive transition edge sensor by using the information regarding correlation between average value of the physical quantity of the plurality of pieces of data and the detection sensitivity of the superconductive transition edge sensor.

7. The radiation analyzing apparatus according to claim 5 ,
wherein the data acquisition unit is configured to add time information to the physical quantity of data, the time information regarding a timing at which each of the physical quantity of the plurality of pieces of data is acquired, and
wherein the sensitivity correction unit corrects the detection sensitivity of the superconductive transition edge sensor by using the time information added to each of the physical quantity of the plurality of pieces of data.

Assignees

• Hitachi High-Tech Science Corp

Inventors

• Tanaka Keiichi
• Nakayama Satoshi

Classifications

• G01T1/36 Primary

  Measuring spectral distribution of X-rays or of nuclear radiation {spectrometry (pulse selection circuits per se H03K; investigation of materials by radiation diffraction G01N23/20; spectrometer tubes H01J49/00)} · CPC title

• G01T1/1606 Primary

  with other specified detectors not provided for in the other subgroups of G01T1/16 · CPC title

• G01T7/005

  calibration techniques (stabilization of spectrometer G01T1/40) · CPC title