An on-line TDC-312 computer-controlled neutron diffractometer

Sequeira, A. ; Momin, S. N. ; Rajagopal, H. ; Soni, J. N. ; Chidambaram, R. ; Kumar, Dilip ; Ramana Rao, A. ; Gopu, V. M. (1978) An on-line TDC-312 computer-controlled neutron diffractometer Pramana - Journal of Physics, 10 (3). pp. 289-302. ISSN 0304-4289

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The design and fabrication of an indigenous on-line computer controlled four-circle neutron diffractometer at the CIRUS reactor in Trombay are described. The diffractometer has an 18 in dia full-circle crystal-orienter which is sturdy enough to carry a cryostat. Three crystal orientation angles χ, Φ and ω and the detector angle 2θ can be set to an accuracy of O.Ol°. The four angle shafts are driven through precision worm-gears by SCR-controlled DC motors and their instantaneous positions sensed by optical digitizers. The diffractometer is interfaced to an ECIL TDC-312 computer system consisting of the CPU with 4K-memory, ASR-35 teletype, X- Y plotter and the digital input/output system (DIOS). The DIOS which operates under program control is a real-time peripheral device used to exchange information in digital form between the computer and the diffractometer. A software package consisting of over 40 user oriented teletype commands has been developed for on-line control and automatic data-acquisition.

Item Type:Article
Source:Copyright of this article belongs to Indian Academy of Sciences.
Keywords:Computer Controlled Diffractometer; Four-circle Neutron Diffractometer; Diffractometer Control Software
ID Code:86274
Deposited On:08 Mar 2012 11:25
Last Modified:19 May 2016 01:56

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