Brazilian National Synchrotron Light Laboratory (LNLS) has commissioned its 500-MeV booster synchrotron machine. In this paper we present an overview of the magnet power supply system comprised by precise (better than 10 ppm) current supplies ranging from 5 A to 300 A, with powers of a few watts to 126 kW, and current ripple of 0.02 to 0.1 % relative to the maximum current. As the booster operates also as a storage ring, a special ramped current power supply had to be designed for the dipole magnets in order to accomplish both requirements of fast ramping up (1.9 s) and precise DC operation.

The energy of the injection linac and transport line into the LNLS synchrotron storage ring will be increased to 170 MeV by doubling the microwave power of the linac.The new system will operate with 4 klystrons, delivering 25 MW pulses into each one of 4 accelerating SLAC-type structures. This paper describes the design and construction and tests of 2 new klystron modulators, microwave drive system, waveguides, as well as the upgrading of the power supplies for the linac and transport line magnets.