D1A, a high resolution neutron powder diffractometer with a bank of mylar collimators

✍ Scribed by A.W. Hewat; I. Bailey

• Publisher: Elsevier Science
• Year: 1976
• Weight: 643 KB
• Volume: 137
• Category: Article
• ISSN: 0029-554X
• DOI: 10.1016/0029-554x(76)90469-9

✦ Synopsis

This paper describes a first attempt at following the design criteria set out earlier for a high resolution conventional powder diffractometer. An existing machine, DIA, has been modified using a bank of ten high pressure 3He counters and almost perfect 10' mylar foil collimators. The system is more successful than earlier multicollimator arrangements because each of the collimator/counters is virtually identical; this permits automatic addition of the intensities so that a single high resolution profile, up to X40 times as intense as on the original diffractometer, is obtained just as easily as on a single counter machine A comparison is made with the other powder diffractometers, D1B and D2 at the ILL.