Content deleted Content added
added image |
mNo edit summary |
||
Line 23:
==Advantages and Disadvantages==
TES detectors are attractive to the scientific community for a variety of reasons. Among their most striking attributes are an unprecedented high detection efficiency customizable to wavelengths from the millimeter regime to gamma rays <ref name=IrwinHilton /> <ref name=NIST />, and a theoretical negligible background dark count level (less than 1 event in 1000 s from intrinsic [[Phonon_noise|thermal fluctuations]] of the device <ref name=NIST2 />). (In practice, although only a real energy signal will create a current pulse, a nonzero background level may be registered by the counting algorithm or the presence of background light in the experimental setup
TES single-photon detectors suffer nonetheless from a few disadvantages as compared to their [[Single-photon_avalanche_diode|avalanche photodiode]] (APD) counterparts. APDs are manufactured in small modules which count photons out-of-the-box with a [[dead_time|dead time]] of a few nanoseconds and output a TTL pulse corresponding to each photon with a jitter of tens of picoseconds. In contrast, TES detectors must be operated in a cryogenic environment, output a signal which must be further analyzed to identify photons, and have a jitter of approximately 100 ns <ref name=NIST />. Furthermore, a single photon spike on a TES detector lasts on the order of microseconds.
| |||