Browsing by Author "WU, JP"

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BOLOMETRIC RESPONSE OF HIGH-T-C SUPERCONDUCTING DETECTORS TO OPTICAL PULSES AND CONTINUOUS WAVES
(1995-05-01)
CHEN, RC
;
WU, JP
;
CHU, HS
;
交大名義發表
;
機械工程學系
This work presents a thermal analysis on predicting the temperature increase and the voltage response of high-T-c superconducting bolometers. Two heat transfer models, that is, the surface heating model and the heat generation model considering the skin depth, are introduced and compared. The surface heating model is found to be valid only for situations where the skin depth is much smaller than the film thickness. To consider the thermal boundary resistance between film and substrate, a radiation-boundary-condition model based on acoustic mismatch model (AMM) and an interfacial-layer model (ILM) are employed. The thermal boundary resistance significantly influences the voltage response. Additionally, several common substrates are examined. SrTiO3 (100) or LaAlO3 (100) is a better substrate for high-T-c superconducting bolometers. One interesting finding was that when compared with experimental data, all the theoretical values from the present study as well as the other previously theoretical treatment overestimate the voltage response near the transition temperature.
THERMAL-ANALYSIS OF HIGH-T(C) SUPERCONDUCTING BOLOMETERS
(1993-12-01)
WU, JP
;
CHEN, RC
;
CHU, HS
;
交大名義發表
;
機械工程學系
In this work we have presented a 2D analysis on predicting the temperature increase and the voltage response of high-T(c) superconducting bolometers. A heat generation model is used to consider absorption of irradiation of energy by film. The type of laser beam is continuous waves (CW). To consider the thermal boundary resistance, a radiation-boundary-condition model based on acoustic mismatch model (AMM) is employed. The effects of the incident energy and radius of laser beam, as well as the thermal conductivity ratio in x and y directions for thin-film superconductors on the voltage response are investigated. The results of our work are also compared with previously experimental and 1D theoretical analyses for various initial temperatures.