The Control of VEPP-4M Magnetic System

S. Karnaev, E. Kuper, A. Ledenev, B. Levichev,
I. Protopopov, Io. Zaroudnev
INP Novosibirsk

The use of BINP designed distributed intelligent controllers for high-stability magnet power supplies allows successful solution of the problem of beam acceleration in the VEPP-4M collider. There are two varieties of the controller. The first has a sixteen 16-bit DAC, the second has a 19-bit DAC, error amplifier and shunt. Both varieties have digital interpolation and MIL/STD-1553 interfaces. Hardware and software aspects of the control of the magnetic system are described. Results of study of field's behavior in magnetic elements using these distributed controllers are presented.