RESEARCH FACILITY FOR AUTOMATED MEASUREMENTS OF THE CYCLOTRON MAGNETIC FIELD TOPOGRAPHY

V.M. Zorina, V.A. Zasenko, A.V. Nikiforovsky, A.V. Pozhensky, Yu.I. Stogov, A.P. Strokachª, S.Yu. Udovichenko

Federal State Unitary Enterprise Efremov Scientific Research Institute of Electrophysical Apparatus, Saint-Petersburg, Russia

Abstract

The field topography is measured in the polar system of coordinates using 40 Hall sensors installed on a radial line as detecting elements.

A set of instrumentation includes: an electric drive, automated meters for angles and linear movements built on the basis of a 16-bit absolute encoder; detecting elements for measuring the field in the axial channels of the magnet.

The electronics used for the acquisition and processing of the information comprises: a source of control current for the Hall sensors, a power supply for temperature probes, a multiplexer to alternately connect signal electrodes of all the sensors to a signal meter; an ADC or a computer-controlled voltmeter to measure and record signals of a sensor.

When measuring the field, the attained accuracy was 2∙10^-4. The source of the stabilized magnet excitation current installed on our facility allows measurements with an accuracy of 3∙10^-4 to be carried out.

ª – corresponding author

Paper 

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