A photon-counting, subnanosecond, imaging camera for x-ray detection
We have developed a high-bandwidth, photon-counting, x-ray detector for x-ray imaging experiments. It consists of an x-ray photocathode, an optional microchannel plate (MCP), optional electrostatic optics, and a subnanosecond phosphor. The detector can be used for two-dimensional imaging with a subnanosecond framing camera or one-dimensional imaging with a Reticon or streak-camera readout. Several versions of the one-dimensional detector have been developed. The MCP version employs a photocathode on the front surface of the MCP, and the transmission-photocathode version consists of a photocathode deposited on a thin polypropylene foil. The output electrons from the MCP or the transmission photocathode are accelerated into a fast phosphor deposited on a coherent fiber-optic faceplate. Both detectors can be enhanced with the use of electrostatic electron optics to compress the output electrons in one dimension. The best parameters achieved to date are a time resolution of 400 ps, spatial resolution of 100 ..mu..m, and electron compression of 10:1. Quantum efficiencies of 40% have been achieved. Effective quantum efficiencies greater than 100% have been achieved with the one-dimensional electrostatic optics. Data are presented on the efficiency, time response, at spatial resolution of the one-dimensional detectors. 5 refs., 9 figs.
- Research Organization:
- Lawrence Livermore National Lab., CA (USA)
- DOE Contract Number:
- W-7405-ENG-48
- OSTI ID:
- 6685068
- Report Number(s):
- UCRL-98505; CONF-8809105-9; ON: DE89002874
- Resource Relation:
- Conference: SPIE O-E Lase: international symposium and exhibition on fiber optics, optoelectronics and laser applications, Boston, MA, USA, 6 Sep 1988; Other Information: Portions of this document are illegible in microfiche products
- Country of Publication:
- United States
- Language:
- English
Similar Records
Absolute detection efficiency of a micro-channel plate detector to x-rays in the 1--100 KeV energy range
Absolute detection efficiency of a micro-channel plate detector to x-rays in the 1--100 KeV energy range
Related Subjects
PHOTODETECTORS
X-RAY DETECTION
FIBER OPTICS
FOCUSING
PHOTOCATHODES
QUANTUM EFFICIENCY
SPATIAL RESOLUTION
STREAK CAMERAS
TRAJECTORIES
CAMERAS
CATHODES
DETECTION
EFFICIENCY
ELECTRODES
MEASURING INSTRUMENTS
RADIATION DETECTION
RADIATION DETECTORS
RESOLUTION
440300* - Miscellaneous Instruments- (-1989)