Simulations of athermal phonon propagation in a cryogenic semiconducting bolometer
Simulations of athermal phonon propagation in a cryogenic semiconducting bolometer
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低温半导体测辐射热计中的无热声子传播模拟
DOI:
10.1117/12.2561969
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发表时间:
2020
期刊:
影响因子:
--
通讯作者:
Maffei Bruno
中科院分区:
文献类型:
--
作者:
Stever Samantha;Couchot Francois;Maffei Bruno
We present three Monte Carlo models for the propagation of athermal phonons in the diamond absorber of a composite semiconducting bolometer ‘Bolo 184'. Previous measurements of the response of this bolometer to impacts by α particles show a strong dependence on the location of particle incidence, and the shape of the response function is determined by the propagation and thermalisation of athermal phonons. The specific mechanisms of athermal phonon propagation at this time were undetermined, and hence we have developed three models for probing this behaviour by attempting to reproduce the statistical features seen in the experimental data. The first two models assume a phonon thermalisation length determined by a mean free path λ, where the first model assumes that phonons thermalise at the borders of the disc (with a small λ) and the second assumes that they reflect (with a λ larger than the size of the disc). The third model allows athermal photons to propagate along their geometrical line of sight (similar to ray optics), gradually losing energy. We find that both the reflective model and the geometrical model reproduce the features seen in experimental data, whilst the model assuming phonon thermalisation at the disc border produces unrealistic results. There is no significant dependence on directionality of energy absorption in the geometrical model, and in the schema of this thin crystalline diamond, a reflective absorber law and a geometrical law both produce consistent results.
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DOI:
10.1007/bf01453760
发表时间:
1991
期刊:
影响因子:
--
作者:
C. Jasiukiewicz;D. Lehmann;T. Paszkiewicz
通讯作者:
T. Paszkiewicz
DOI:
10.1117/12.2313968
发表时间:
2018
期刊:
Astronomical Telescopes + Instrumentation
影响因子:
--
作者:
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通讯作者:
B. Maffei
DOI:
10.1088/0022-3719/17/18/007
发表时间:
1984
期刊:
影响因子:
--
作者:
D. Hurley;A. Every;J. Wolfe
通讯作者:
J. Wolfe
影响因子:
1.3
作者:
S. Stever;F. Couchot;N. Coron;B. Maffei
通讯作者:
B. Maffei
DOI:
10.1051/aas:2000129
发表时间:
1999
期刊:
Astronomy & Astrophysics Supplement Series
影响因子:
--
作者:
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通讯作者:
B. Vozzi