Abstract
Microchannel plates (MCPs) are widely used in photodetectors with a picosecond resolution. Two main characteristics of MCPs, gain and timing resolution, strongly depend on the materials parameters, as well as on the history of electron avalanche evolution. The most important effect that can significantly change the efficiency of an MCP is the effect of saturation of the electronic current, which occurs at high-level input signals. In this paper, the saturation effects are studied numerically, as they are applicable to analysis of large-area, fast photodetectors. It is shown that the saturation effect for short pulses can be reduced by introducing a thin, resistive layer between the bulk material and the emissive coating. The gain and time resolution dependencies on the pore size and voltage are studied numerically. The results are compared with the simulations of other authors and available experimental data.
| Original language | English |
|---|---|
| Title of host publication | IEEE Nuclear Science Symposuim and Medical Imaging Conference, NSS/MIC 2010 |
| Pages | 1193-1198 |
| Number of pages | 6 |
| DOIs | |
| Publication status | Published - 2010 |
| Externally published | Yes |
| Event | 2010 IEEE Nuclear Science Symposium, Medical Imaging Conference, NSS/MIC 2010 and 17th International Workshop on Room-Temperature Semiconductor X-ray and Gamma-ray Detectors, RTSD 2010 - Knoxville, TN, United States Duration: Oct 30 2010 → Nov 6 2010 |
Other
| Other | 2010 IEEE Nuclear Science Symposium, Medical Imaging Conference, NSS/MIC 2010 and 17th International Workshop on Room-Temperature Semiconductor X-ray and Gamma-ray Detectors, RTSD 2010 |
|---|---|
| Country | United States |
| City | Knoxville, TN |
| Period | 10/30/10 → 11/6/10 |
Fingerprint
ASJC Scopus subject areas
- Radiation
- Nuclear and High Energy Physics
- Radiology Nuclear Medicine and imaging
Cite this
Charge relaxation and gain depletion for candidate secondary electron emission materials. / Insepov, Zeke; Ivanov, Valentin; Elam, Jeffrey; Adams, Bernhard; Frisch, H.
IEEE Nuclear Science Symposuim and Medical Imaging Conference, NSS/MIC 2010. 2010. p. 1193-1198 5873957.Research output: Chapter in Book/Report/Conference proceeding › Conference contribution
}
TY - GEN
T1 - Charge relaxation and gain depletion for candidate secondary electron emission materials
AU - Insepov, Zeke
AU - Ivanov, Valentin
AU - Elam, Jeffrey
AU - Adams, Bernhard
AU - Frisch, H.
PY - 2010
Y1 - 2010
N2 - Microchannel plates (MCPs) are widely used in photodetectors with a picosecond resolution. Two main characteristics of MCPs, gain and timing resolution, strongly depend on the materials parameters, as well as on the history of electron avalanche evolution. The most important effect that can significantly change the efficiency of an MCP is the effect of saturation of the electronic current, which occurs at high-level input signals. In this paper, the saturation effects are studied numerically, as they are applicable to analysis of large-area, fast photodetectors. It is shown that the saturation effect for short pulses can be reduced by introducing a thin, resistive layer between the bulk material and the emissive coating. The gain and time resolution dependencies on the pore size and voltage are studied numerically. The results are compared with the simulations of other authors and available experimental data.
AB - Microchannel plates (MCPs) are widely used in photodetectors with a picosecond resolution. Two main characteristics of MCPs, gain and timing resolution, strongly depend on the materials parameters, as well as on the history of electron avalanche evolution. The most important effect that can significantly change the efficiency of an MCP is the effect of saturation of the electronic current, which occurs at high-level input signals. In this paper, the saturation effects are studied numerically, as they are applicable to analysis of large-area, fast photodetectors. It is shown that the saturation effect for short pulses can be reduced by introducing a thin, resistive layer between the bulk material and the emissive coating. The gain and time resolution dependencies on the pore size and voltage are studied numerically. The results are compared with the simulations of other authors and available experimental data.
UR - http://www.scopus.com/inward/record.url?scp=79960293637&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=79960293637&partnerID=8YFLogxK
U2 - 10.1109/NSSMIC.2010.5873957
DO - 10.1109/NSSMIC.2010.5873957
M3 - Conference contribution
AN - SCOPUS:79960293637
SN - 9781424491063
SP - 1193
EP - 1198
BT - IEEE Nuclear Science Symposuim and Medical Imaging Conference, NSS/MIC 2010
ER -