By D. McCammon (auth.), Christian Enss (eds.)
The improvement of cryogenic units for particle detection has reached a degree at which many fascinating purposes are achievable and have already got been validated. The publication presents a finished assessment of the sector of cryogenic particle detection. It introduces the various detection thoughts and provides an summary of the real components within which those detectors are effectively utilized.
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Extra info for Cryogenic Particle Detection
Measurements at the time, particularly on germanium and silicon, usually did not look much like this. Experiments gave a variety of R(T ) curves that were not reproducible from one sample to the next. However, data from samples doped by nuclear transmutation (NTD) or by careful ion implantation do show the expected behavior. This can be seen in Fig. 1, where the T −1/2 behavior predicted by vrh with a “Coulomb gap” is quite accurately followed over several orders of magnitude in resistance. Even modern melt-doped material seldom shows this clear Coulomb gap behavior.
A better quantitative impression can be obtained from Fig. 3, where GA introduces another pole in the signal response. Above the frequency of this second pole, the signal to TFN ratio, which is otherwise completely independent of frequency, will start to drop as 1/f . This is the same eﬀect that otherwise occurs above the frequency where the TFN drops below the level of the Johnson noise, so it will not seriously impact the energy resolution if the new pole is at a considerably higher frequency than this crossing point.
Using the deﬁnition of noise equivalent power as NEP(f )≡ en (f )/SV (f ), the right-most expression in (33) then gives: ⎛ ∞ ∆Erms = ⎝ 0 ⎞−1/2 4 df ⎠ NEP2 . (34) 18 D. McCammon Fig. 9. Optimally ﬁltered pulse of Fig. 2c. s. 22. A noise-free pulse from the same ﬁlter is shown by the dashed line The assumption of instantaneous energy input is often not a good one, so the more general form in (33) is also useful. Figure 9 shows the pulse in Fig. 2c after √ application of the optimal ﬁlter. Note that this output pulse is a factor of r2 + 1 faster than the pulse from the detector in Fig.
Cryogenic Particle Detection by D. McCammon (auth.), Christian Enss (eds.)