X-ray detection characteristics of microchannel plates in the energy range from 1.8 to 8 keV

Publisher Website
Google Scholar
Abstract
The characteristics of microchannel plates (MCPs) for detection of x rays have been investigated using synchrotron radiation in the energy range from 1.8 to 8 keV. The current response curve of MCPs is measured with approximately continuous x‐ray energy variation, which is added to the previous data [T. Kondoh et al., Rev. Sci. Instrum. 5 9, 252 (1988)]. It is confirmed that there is a minimum in the current response at the x‐ray energy of about 4 keV. The precise current response curve has been completed for the wide x‐ray energy range from 0.6 to 20 keV. A transition in the incident angle dependence of current response is found from the feature based on single cylindrical photocathode model for soft x rays to that based on multiple channel activation due to the penetration of x rays through channel walls for hard x rays. In the current response of MCPs the structure similar to that in EXAFS is observed near the Si K edge.