A PROGRAM OF BASIC RESEARCH TO STUDY X-RAY SPECTRA IN THE REGION 15 TO 50 ANGSTROMS
Abstract
A vacuum spectrographic system has been designed and built for the study of x-ray spectra in the 15 to 50 Angstroms region. This spectrograph is equally well suited for use throughout the ordinary x-ray region from 0.1 to 15 Angstroms. Initial and principal experiments with the system will be with Bragg Law analyzers; however, the system is dimensionally compatible with the installation and use of grazing incidence gratings should it be desired to extend the experiments to include comparisons of performance. The present spectrometer drive is accurate to better than !0.02 degrees and reproducible to !0.002 degrees. A specimen can be excited either by direct electron bombardment or by high intensity x-rays. The versatile generator arrangement provides fully stabilized outputs of up to 30,000 volts full wave rectified or at constant potential and up to 100 ma. Analyzers built from monomolecular barium stearate films have yielded strong, sharp diffraction lines from as few as 140 layers. The 50.2 Angstrom d spacing of these analyzers is ideal from the standpoint of any future use in double crystal spectrometer arrangements. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- May 01, 1961
- Accession Number
- AD0276293
Entities
People
- Eugene W. White
- Thomas C. Jr. Furnas