RE: Automated XRD Date

In 1981 I started as a working student at the Siemens Research Centre in Erlangen, Germany. There was a type F goniometer, equipped with stepping motors installed by local employees. The detector was a Si(Li) enabling switing between CuKa, CuKb and finally even W-radiation with old tubes. I

Re: Automated XRD Date

- See eg: http://www.afc.asso.fr/images/AICr2014/historique/shule.png (C. G. Shull, Nobel Lecture, December 8, 1994) - "The diffraction of neutrons by crystalline powders", E. O. Wollan and C. G. Shull, Physical Review 1947, 73, 830-841 - "Neutron Diffraction Studies of NaH and

Re: Automated XRD Date

Neutron diffractometers were automatic well before x-ray diffractometers, and were also first for position sensitive detectors (PSDs) and of course Rietveld refinement. Paper tape control was introduced in the 1950's, computers in the early 1960's and PSD's in the early 1970's. X-rays followed

Re: Automated XRD Date

> > By automated I mean simply producing digital data, in x y pairs I assumed you meant automated stepping. If you mean just digital data, then its Shull and Wollan in the late 1940's. Neutrons were always digital of course; we had film and cameras much later than for x-rays. You must be

RE: Automated XRD Date

Yes I do mean automated stepping; I didn’t realize there were so many sub-developments: A goniometer driven by a stepper motor with a counter/timer monitoring the output from the detector. Younger than you thought?!? This is a first! Jim James P. Cline Materials Measurement Science

Re: Automated XRD Date

> > I didn’t realize there were so many sub-developments... > Still, modern x-ray powder diffraction is the most important sub-development... Alan __ * Dr Alan Hewat, NeutronOptics, Grenoble, FRANCE * +33.476.98.41.68

RE: Automated XRD Date

I think this answers my question. [By automated I mean simply producing digital data, in x y pairs.] In 1980, in Bob Snyder’s lab we had an automated Philips; the mounting of the stepper motor was home-brew, but the electronics consisted of out-of-the-box Canberra products. So I presumed

Automated XRD Date

Hi all, Anyone know when/where the first automated powder diffractometer was commissioned? I'm going to presume it was used with a non-laboratory source: 2nd, when/where was the first lab diffractometer commissioned? Regards, Jim James P. Cline Materials Measurement Science Division