An Automated Laboratory Laser Heating Arrangement for Materials Synthesis at High Temperatures and High Pressures

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dc.creatorSubramanian, N.
dc.creatorUmmru, Mrithula
dc.creatorBindu, R.
dc.creatorKumar, N. R. Sanjay
dc.creatorSekar, M.
dc.creatorShekar, N. V. Chandra
dc.creatorSahu, P. Ch.
dc.date2008-05-08
dc.date.accessioned2026-07-07T09:37:58Z
dc.date.available2026-07-07T09:37:58Z
dc.descriptionThis paper describes the automation of a laser heating arrangement for synthesizing and studying materials at high pressures (up to ~ 1 Mbar) and high temperatures (up to ~ 5000 K). In this arrangement, a diamond anvil high-pressure cell (DAC) containing a microscopic sample of typical diameter ~50-100 micrometer, is mounted on a precision X-Y nanomotor stage that forms part of an IR laser heating optical assembly. Automation of this stage has been accomplished using a LabVIEW virtual instrument program to manipulate the X and Y stages using nanopositioning systems. This has a major feature of enabling a rastered heating of the sample over a user-defined circular area, without any operator intervention in addition to a virtual joystick to position the sample with respect to the laser spot. This auto-rastering feature has the advantage of offering uniform exposure of a circular area of the sample to the incident heating laser beam apart from drastic reduction in scan time compared to a manual scan. The diameter of the circle can be varied from a maximum of ~24 mm down to the focal spot size of the laser (~few micrometers), enabling thereby usage of the laser heating arrangement for heating microscopic samples under high-pressure in a DAC, as well as bulk samples at atmospheric pressure. Examples for both macro and micro scale automated laser-heating experiments have been presented. In particular, at the micro scale, auto-raster heated carbon samples at ~ 17 GPa and ~2000 K showed excellent signatures of diamond formation compared to manually raster heated samples, highlighting the unique advantage of auto-raster heating.
dc.description16 pages, 4 figures, prepared for submitting to appropriate journal
dc.identifierhttps://arxiv.org/abs/0805.1251
dc.identifierhttp://arxiv.org/abs/0805.1251
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/160643
dc.subjectInstrumentation and Detectors
dc.subjectGeophysics
dc.titleAn Automated Laboratory Laser Heating Arrangement for Materials Synthesis at High Temperatures and High Pressures
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