Windowless position-sensitive x-ray detector for a Rowland circle crystal spectrometer

Journal Article · Fri Aug 01 00:00:00 EDT 1986 · Rev. Sci. Instrum.; (United States)

DOI:https://doi.org/10.1063/1.1138715· OSTI ID:5564948

Duval, B P; Bateman, J E; Peacock, N J

The output from an x-ray detector using a Chevron pair of microchannel plates has been linearly encoded using an artificial delay line technique. The detector, operating in the wavelength region 12--30 A-circle, has been mounted on the focusing plane of a Johann crystal spectrometer, radius 25 cm, and used to survey the spectrum from the Divertor Injection Tokamak Experiment (DITE) tokamak. The 20 x 20 mm/sup 2/ detector is encoded by a remote, CAMAC based, computer acquisition system which at an electronic count rate of 1 x 10/sup 5/ Hz shows negligible degradation of the spectral profiles. Events encoded along the 20-mm dimension are directly histogrammed into a CAMAC memory which is capable of recording 128 time frames each with 256 spectral bins with 12 bits/bin. In nonoptimized tests, a FWHM of 60 ..mu..m is observed, and a count rate up to 2 x 10/sup 4/ Hz/mm has been achieved. The high-resolution capability and the shallow detection depth of the microchannel plate both complement the low f-italic number of the spectrometer. Results are reported for the DITE tokamak.

• Research Organization: (Euratom/UKAEA Fusion Association), Culham Laboratory, Abingdon, Oxon OX14 3DB, United Kingdom
• OSTI ID: 5564948
• Journal Information: Rev. Sci. Instrum.; (United States), Vol. 57:8
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
DITE TOKAMAK
PLASMA DIAGNOSTICS
X-RAY SPECTROMETERS
DESIGN
PHOTODETECTORS
CAMAC SYSTEM
DATA ACQUISITION SYSTEMS
MICROCHANNEL ELECTRON MULTIPLIERS
SOFT X RADIATION
SPATIAL RESOLUTION
X-RAY DETECTION
CLOSED PLASMA DEVICES
DETECTION
ELECTROMAGNETIC RADIATION
ELECTRON MULTIPLIERS
ELECTRON TUBES
IONIZING RADIATIONS
MEASURING INSTRUMENTS
RADIATION DETECTION
RADIATIONS
RESOLUTION
SPECTROMETERS
THERMONUCLEAR DEVICES
TOKAMAK DEVICES
X RADIATION
700102* - Fusion Energy- Plasma Research- Diagnostics