DocumentCode :
1230042
Title :
Improvements in the AIST Cryogenic Radiometer With Superconducting Thermometer
Author :
Fukuda, Daiji ; Zen, Nobuyuki ; Ohkubo, Masataka ; Takahashi, Hiroyuki ; Amemiya, Kuniaki ; Endo, Mitiyuki
Author_Institution :
National Inst. of Adv. Ind. Sci. & Technol., Tsukuba
Volume :
56
Issue :
2
fYear :
2007
fDate :
4/1/2007 12:00:00 AM
Firstpage :
356
Lastpage :
360
Abstract :
We are developing a cryogenic radiometer (CR) with a superconducting thermometer for the optical laser power calibration. This device consists of a niobium transition edge sensor and an electrical substitution heater on a silicon substrate. The device temperature is locked at the niobium transition temperature with a superconducting quantum interference device amplifier and a proportional-integral-derivative controller. The device successfully determines the absolute optical power in the range from 20 nW to 600 muW, with a fast response of 3 s. The equivalence measurement shows that the response difference between the substitution power and the simulated optical power is less than 0.0034%. These properties are very attractive for next generation of a high-accuracy CR
Keywords :
SQUIDs; cryogenics; laser variables measurement; measurement standards; optical variables measurement; radiometers; thermometers; transition radiation detectors; 3 s; AIST; cryogenic radiometer; niobium transition temperature; primary standards; proportional-integral-derivative controller; quantum interference device amplifier; superconducting thermometer; Chromium; Cryogenics; Laser transitions; Niobium; Optical sensors; Radiometry; SQUIDs; Stimulated emission; Superconducting transition temperature; Temperature sensors; Cryogenic electronics; primary standards; superconducting radiation detectors;
fLanguage :
English
Journal_Title :
Instrumentation and Measurement, IEEE Transactions on
Publisher :
ieee
ISSN :
0018-9456
Type :
jour
DOI :
10.1109/TIM.2007.891055
Filename :
4126863
Link To Document :
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