College Park, Maryland      June 6 - 10 , 2004

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TP32: A new polarized Neutron Reflectometer at Dhruva Reactor

Surendra Singh, Saibal Basu (Solid State Physics Division, Bhabha Atomic Research Centre, Mumbai –85 INDIA)

A new Polarized Neutron Reflectometer has been installed at Guide Tube Laboratory of Dhruva Reactor, BARC, India. Unlike the conventional q– 2q instrument, this instrument uses a linear Position Sensitive Detector and a high precision rotational sample table. This arrangement, immensely, helps collecting data in off specular mode. In this paper we presents the specification of instrument and few examples of specular reflectivity data as well as off specular reflectivity data of a thin films and multilayers, measured by this instrument, both for polarized and unpolarized mode. The reflectivity data are analyzed using a genetic algorithm based x² minimization program developed by us.

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