PAC2013 - List of Authors (Vondrasek, R.C.)

Paper	Title	Page
MOPSM01	High Voltage Stabilization System of CARIBU/ECR for ATLAS	348
	Y. Luo, R.C. Pardo, G. Savard, S.I. Sharamentov, R.C. Vondrasek ANL, Argonne, USA
	Funding: This work was supported by the U.S. Department of Energy, Office of Nuclear Physics, under Contract No. DE-AC02-06-CH11357. With the increased radioactive beam capabilities brought by new CARIBU (Californium Rare Isotope Breeder Upgrade) in ATLAS facility, highest charge breeder efficiency of ECR is desired. Experimental study shows that the best efficiency could be achieved when high voltages (up to 50KV) of two platforms (CARIBU and ECR) are only different within less than 1V. We have developed a system with some innovative ideas implemented to measure the required tiny voltage difference ratio (~0.002%) precisely and to protect the system too. High voltage (HV) filter is designed to protect it from severe HV sparks and multiple level of relays with high precision medium HV divider are used to protect it from possible power supply failure. Homemade HV divider is used for rough measurement and control. Measurement results are converted to optical signals and then used to control power supplies to achieve the desired platform voltages. The system has been partially tested and will be used in the future.

Paper

Title

Page

High Voltage Stabilization System of CARIBU/ECR for ATLAS

348

Y. Luo, R.C. Pardo, G. Savard, S.I. Sharamentov, R.C. Vondrasek
ANL, Argonne, USA

Funding: This work was supported by the U.S. Department of Energy, Office of Nuclear Physics, under Contract No. DE-AC02-06-CH11357.
With the increased radioactive beam capabilities brought by new CARIBU (Californium Rare Isotope Breeder Upgrade) in ATLAS facility, highest charge breeder efficiency of ECR is desired. Experimental study shows that the best efficiency could be achieved when high voltages (up to 50KV) of two platforms (CARIBU and ECR) are only different within less than 1V. We have developed a system with some innovative ideas implemented to measure the required tiny voltage difference ratio (~0.002%) precisely and to protect the system too. High voltage (HV) filter is designed to protect it from severe HV sparks and multiple level of relays with high precision medium HV divider are used to protect it from possible power supply failure. Homemade HV divider is used for rough measurement and control. Measurement results are converted to optical signals and then used to control power supplies to achieve the desired platform voltages. The system has been partially tested and will be used in the future.