Abstract
Radio frequency field in Mossbauer experiments of rf-collapse studies poses stringent demands on the setup due to strong Radio Frequency Interference-(RFI). In switched-rf experiments, RFI conditions are more acute. Although screening cage is a standard practice, complete shielding and plugging rf-leaks are difficult. We describe an experimental set-up and procedures for coupling rf power to field coil. This set-up was used in switched rf experiments of collapse. Probable modes of rf pick-up and measures to suppress RFI, are discussed. In second part, data acquisition system linked to main-frame Computer is described. Due to the proximity of rf radiation field, demand on system reliability is important. We employed microcomputer based units devoted to smaller dedicated dasks, such as 1) data acquisition, 2) data concentration, 3) serial line link to main-frame computer using UP LOAD and DOWN LOAD subroutines and subsidiary facilities.
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