Abstract:
The on-going Duke storage ring upgrades and
the development of a new booster synchrotron
injection require more than 100 units of high
performance unipolar and bipolar trim power
supplies in the current range of -15A to
+15A. However, most of the trim power
supplies on the market do not deliver two
critical performance features simultaneously:
a high current stability and a low current
noise.An in-house trim power supply
development program is then put in force to
design, fabricate, and test low cost linear
power supplies with current stability about
100 ppm and current ripples less than 100 ppm
in a broad band. A set of unipolar power
supplies (0-12A) have been designed,
fabricated and successfully tested. Since
August, 2004 they have been used in storage
ring operation with excellent performance.
The prototype of bipolar power supplies (± 15
A) has been designed and tested as well. The
main design principles and their performance
results of both unipolar and bipolar supplies
will be presented in this paper.