文档介绍：
NUCLEAR
INSTRUMENTS
Nuclear Instruments and Methods in Physics Research A 346 (1994) 225-229 & METHODS
North-Holland IN PHYSICS
RESEARCH
Section A
Noise of a bolometer with vanishing self-heating
M. Bühler, E. Umlauf
Walther-Meissner-Institut für Tieftemperaturforschung der Bayerischen Akademie der Wissenschaften, D 85748 Garching, Germany
. Mather
Laboratory for Astronomy and Solar Physics, NASA Goddard Space Flight Center, Greenbelt, Maryland 20771, USA
(Received 13 January 1994)
We discuss the thermal noise of a low temperature ic bolometer, which has the property of not being heated by the thermometer
measurement power. This bolometer is promising for measuring small energy pulses from absorbed single particles or X-rays . Having
thermal noise only we can calculate the uncertainty of energy detection and we show that this is not limited by the quantity 4kT ZC . This
result is of interest with respect to experiments which demand large absorbers.
1. Introduction In a very recent paper [3] some basic considerations on
the noise and the possible energy resolution of the mag-
Bolometers with resistive thermometers have been ic bolometer have already been discussed. Due to the
for a long time, and their ultimate sensitivity has been lack of bias heating one can in principle use an arbitrarily
investigated in detail [1,2]. In addition