Initial test results of the Los Alamos proton-storage-ring bump-magnet system

An upgrade program for increasing the stored beam current in the LANSCE Proton Storage facility is presently under way. Part of the upgrade effort has been to design, specify and add four bump-magnet/modulator systems to the ring. This paper describes the initial test results of the first bump-magnet/modulator system. The paper begins with an overview of the pulsed power system including important specifications of the modulator, magnet, cabling and control system. In the main portion of the paper, waveforms and test data are included showing the accuracy, repeatability and stability of the magnet-current pulses. These magnet pulses are programmable both in rise and fall time as well as in amplitude. The amplitude can be set between 50 and 300 A, the rise-time is fixed at 1 ms and the linear fall-time can be varied between 500 /spl mu/s and 1500 /spl mu/s. Other issues such as loading effects and power dissipation in the magnet-bore beam tube are examined and reported.