Phase Lock of Rapid Cycling Synchrotron and Neutron Choppers

1 June 1981

journal article
Published by Institute of Electrical and Electronics Engineers (IEEE) in IEEE Transactions on Nuclear Science

Vol. 28 (3) , 2171-2173
https://doi.org/10.1109/tns.1981.4331626

Abstract

The 500 MeV synchrotron of Argonne's Intense Pulsed Neutron Source operates at 30 Hz. Its beam spill must be locked to neutron choppers with a precision of ± 0.5 μs. A chopper and an accelerator have large and different inertias. This makes synchronization by phase lock to the 60 Hz power line extremely difficult. We solved the phasing problem by running both the Ring Magnet Power Supply (RMPS) of the synchrotron and the chopper motors from a common oscillator that is stable to 1 ppm and by controlling five quantities of the RMPS. The quantities controlled by feedback loops are dc current, injection current, ejection current, resonant frequency, and the phase shift between the synchrotron peak field and the chopper window.

Keywords

This publication has 2 references indexed in Scilit:

Precision Coaxial Manganin Shunts
IEEE Transactions on Nuclear Science, 1971
A High-Current Low-Pass Filter for Magnet Power Supplies
IEEE Transactions on Industrial Electronics and Control Instrumentation, 1970