Extending the dynamic range of microchannel plate detectors using charge-integration-based counting.
Rev Sci Instrum
; 89(7): 073301, 2018 Jul.
Article
en En
| MEDLINE
| ID: mdl-30068116
ABSTRACT
Microchannel plate (MCP) detectors provide a mechanism to produce a measureable current pulse (â¼0.1 mA over several nanoseconds) when stimulated by a single incident particle or photon. Reductions of the device's amplification factor (i.e., gain) due to high incident particle flux can lead to significant degradation of detection system performance. Here we develop a parameterized model for the variation of MCP gain with incident flux. This model provides a framework with which to quantify the limits of high-flux MCP operation. We then compare the predictions of this model to laboratory measurements of an MCP's response to a pulsed charged particle beam. Finally, we demonstrate that through integration of the MCP output current in pulsed operation, effective count rates up to â¼1 GHz can be achieved, more than an order of magnitude increase over conventional counting techniques used for spaceflight applications.
Texto completo:
1
Colección:
01-internacional
Base de datos:
MEDLINE
Tipo de estudio:
Prognostic_studies
Idioma:
En
Revista:
Rev Sci Instrum
Año:
2018
Tipo del documento:
Article
País de afiliación:
Estados Unidos