Development of Low-Energy X-Ray Spectrograph System.
Abstract
The technical report describes the design and construction of a state of the art, large aperture focussing spectrograph of the Johann/Johannson geometry, specially developed for the low energy x ray region of 50-5000 eV. The spectrographic system includes (1) a four kilowatt, demountable low voltage x ray excitation source, (2) a three-position holder for samples which are closely coupled to the excitation source and with a variable take-off angle, (3) a stepping motor driven scanner which accomodates large aperture curved crystal analyzers, a 10 in. diameter focussing circle, and an automatically adjusted exit slit that provides a constant solid angle of measured radiation from the same sample area and at the same time take off angle for all Bragg angles, (4) tunable gas flow, sub-atmospheric pressure counter, and finally (5) provisions for a rapid and easy interchange of thin window filter mounts for both the x ray source and for the counter. A small computer has been specially interfaced to provides scan control, data acquisition and presentation, and preliminary data analysis. It is connected to a large computer for programmed resolution enhancement, de-convolution and the determination of absolute radiative yields from the experimental, overlapping atomic or molecular orbital spectral components.
Document Details
- Document Type
- Technical Report
- Publication Date
- Dec 01, 1985
- Accession Number
- ADA166195
Entities
People
- Burton L. Henke
Organizations
- University of Hawaiʻi System