A microchannel plate intensified, subnanosecond, x-ray imaging camera

Conference · Sat Jul 01 00:00:00 EDT 1989

OSTI ID:5605791

Carter, M R; McKinley, B J; Tirsell, K G

We have developed a microchannel plate intensified, subnanosecond x-ray detector for x-ray imaging experiments. It consists of an x-ray photocathode, a microchannel plate, electrostatic focusing optics and a subnanosecond phosphor. The detector is used for one dimensional imaging and spectroscopic measurements. Signals are recorded using either a one dimensional Reticon camera or a streak camera. The microchannel plates employ an x-ray photocathode (CuI or CsI) deposited on the front surface of the microchannel plate to enhance their soft x-ray efficiency. Electrostatic focusing of the electrons exiting the microchannel plate also enhances the gain of the detector by an order of magnitude. The electrons are accelerated to 20 kV before striking a fast phosphor (Indium doped Cadmium Sulfide). The detector output is coupled to a Reticon camera or a streak camera with a fiber optic array. We have built and calibrated more than twenty microchannel plate intensified detectors. Efficiencies in excess of 1000 (Watts/cm/sup 2/ output per Watt/cm/sup 2/ input) have been demonstrated. The time response of the detector is less than 500 ps. The efficiency of the CuI and CsI x-ray photocathodes have been measured from 450 eV to 1300 eV at the Stanford Synchrotron Radiation Laboratory. Data are presented on the efficiency, time response, spectral response and the spatial resolution of the detectors. 8 refs., 12 figs.

• Research Organization: Lawrence Livermore National Lab., CA (USA)
• DOE Contract Number: W-7405-ENG-48
• OSTI ID: 5605791
• Report Number(s): UCRL-100784; CONF-890809-1; ON: DE89017781
• Resource Relation: Conference: 9. international conference on vacuum ultraviolet radiation physics, Honolulu, HI, USA, 14-18 Aug 1989; Other Information: Portions of this document are illegible in microfiche products
• Country of Publication: United States
• Language: English

Related Subjects

46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY
STREAK CAMERAS
X-RAY DETECTION
CALIBRATION
DESIGN
EFFICIENCY
IMAGES
LASER-PRODUCED PLASMA
MICROCHANNEL ELECTRON MULTIPLIERS
PHOTOCATHODES
SPATIAL RESOLUTION
SPECTRAL RESPONSE
CAMERAS
CATHODES
DETECTION
ELECTRODES
ELECTRON MULTIPLIERS
ELECTRON TUBES
MEASURING INSTRUMENTS
PLASMA
RADIATION DETECTION
RADIATION DETECTORS
RESOLUTION
440101* - Radiation Instrumentation- General Detectors or Monitors & Radiometric Instruments