PEP-II Large Power Supplies Rebuild Program at SLAC

Seven large power supplies (LGPS) with output ratings from 72kW to 270kW power PEP-II quad magnets in the electron-positron collider region. These supplies have posed serious maintenance and reliability problems since they were installed in 1997, resulting in loss of accelerator availability. A rede...

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Bibliographic Details
Main Authors: Bellomo, P., Lipari, J.J., de Lira, A.C., Rafael, F.S.
Format: Conference Proceeding
Language:English
Subjects:
Adders
Availability
Circuit testing
Insulated gate bipolar transistors
Magnets
Maintenance
Power supplies
Programmable control
Pulse width modulation
Temperature control
Online Access:Request full text
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Description
Summary:Seven large power supplies (LGPS) with output ratings from 72kW to 270kW power PEP-II quad magnets in the electron-positron collider region. These supplies have posed serious maintenance and reliability problems since they were installed in 1997, resulting in loss of accelerator availability. A redesign/rebuild program was undertaken by the SLAC Power Conversion Department. During the 2004 summer shutdown all the control circuits in these supplies were redesigned and replaced. A new PWM control board, programmable logic controller, and touch panel have been installed to improve LGPS reliability, and to make troubleshooting easier. In this paper we present the details of this rebuilding program and results.
ISSN:1944-4680
2152-9582
DOI:10.1109/PAC.2005.1591581