ARGONNE DUAL NEUTRON DIFFRACTOMETERS USING A SINGLE PRIMARY BEAM. Report of Metallurgy Program 4.10.5

A Multipurpose Neutron Diffractometer

“…Physics (international Atomic Energy Agency, 1962, abbreviated IAEA hereafter). Two other Argonne diffractometers designed for the crystallographic analysis have been reported by Mueller et al (1962), and a unit for powder and liquid studies by Clayton and Heaton (l96l). The Brookhaven contributions are represented by Corliss et al (1953), Pepinsky et_ al.…”

“…Paraffin intermixed with one or more thermal-neutron attenuatorsT is superior to water and to Masonite as regards both neutron-and y-ray-removal cross sections. However, as stressed by Bacon and Dyer (l959), Mueller et al (1962),and Shull (i960), the Masonite shield is more advantageous as regards fabrication, installation, and modification procedures.…”

“…The X-ray diffraction goniometer, steadily developed during the past two decades can readily be adapted for single-crystal neutron crystallography, see, e.g. : General Electric unit (Pepinsky and Frazer, 1955;Peterson and Levy, 1959;Shull, 1960); Hilger (Arndt and Willis, 1963); Picker X ray (Mueller et al, 1962). However, the X-ray turntable can hardly accommodate our massive auxiliary instruments, such as the magnet and the Dewar.…”

“…However, the X-ray turntable can hardly accommodate our massive auxiliary instruments, such as the magnet and the Dewar. Some dimensional characteristics of the horizontal turntable described by Mueller et al (1962) meets with our specifications and therefore they were partially incorporated into our engineering designs. The key components, their correlative modes with the driving and encoding mechanisms and the counter-unit construction are, however, substantially different from the model of Mueller et al Consequently, extensive engineering and instrumental work was needed.…”