Author: Louie, W.
Paper Title Page
WEPMS020 NSLS-II Booster Power Supplies Control 1018
 
  • P.B. Cheblakov, S.E. Karnaev, S.S. Serednyakov
    BINP SB RAS, Novosibirsk, Russia
  • W. Louie, Y. Tian
    BNL, Upton, Long Island, New York, USA
 
  The NSLS-II booster Power Supplies (PSs) [1] are divided into two groups: ramping PSs providing passage of the beam during the beam ramp in the booster from 200 MeV up to 3 GeV at 300 ms time interval, and pulsed PSs providing beam injection from the linac and extraction to the Storage Ring. A special set of devices was developed at BNL for the NSLS-II magnetic system PSs control: Power Supply Controller (PSC) and Power Supply Interface (PSI). The PSI has one or two precision 18-bit DACs, nine channels of ADC for each DAC and digital input/outputs. It is capable of detecting the status change sequence of digital inputs with 10 ns resolution. The PSI is placed close to current regulators and is connected to the PSC via fiber-optic 50 Mbps data link. The PSC communicates with EPICS IOC through a 100 Mbps Ethernet port. The main function of IOC includes ramp curve upload, ADC waveform data download, and various process variable control. The 256 Mb DDR2 memory on PSC provides large storage for up to 16 ramping tables for the both DACs, and 20 second waveform recorder for all the ADC channels. The 100 Mbps Ethernet port enables real time display for 4 ADC waveforms. This paper describes a project of the NSLS-II booster PSs control. Characteristic features of the ramping magnets control and pulsed magnets control in a double-injection mode of operation are considered in the paper. First results of the control at PS testing stands are presented.
[1] Power Supply Control System of NSLS-II, Y. Tian, W. Louie, J. Ricciardelli, L.R. Dalesio, G. Ganetis, ICALEPCS2009, Japan
 
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