ECRIS08 - Table of Sessions

WECO-A — Charge Breeding (17-Sep-08 08:30—10:00)

Chair: D. P. May, Texas A&M University, College Station, Texas

Paper	Title	Page
WECO-A01	New Configuration and Results with the LPSC Charge Breeder	180
	T. Lamy, J. Angot, C. Fourel, T. Thuillier LPSC, Grenoble
	Funding: This work is supported by EU within the EURONS network under Contract No. RII3-506065. A 1+ surface ionisation source has been used to produce Sodium and Rubidium beams in order to compare the PHOENIX Booster capture efficiency for different ion masses but with the same beam optics. Yields of 1.9% for 23Na⁶⁺ and 3.5% for 85Rb¹⁵⁺, with charge breeding times of 8,6ms/q and 4,6ms/q respectively have been measured. 1+ and n⁺ emittance measurements are presented along with the capture sensitivity to different parameters (DeltaV plots). Technical modifications have been performed to the charge breeder : replacement of the plasma chamber to allow a double frequency operating (14 + 18 GHz), modification of the injection magnetic plug to reinforce the axial magnetic field and correct its dissymmetry in the 1+ beam deceleration zone, insulation improvement to allow 60kV operation for the SPIRAL2 project. First charge breeding experimental results at 14 and 18GHz in the new configuration are presented and discussed for Rb beams
	Slides
WECO-A02	Status of the ECRIS Charge State Breeding Project at TRIUMF	183
	F. Ames, R. A. Baartman, P. G. Bricault, K. Jayamanna, M. McDonald, P. Schmor TRIUMF, Vancouver T. Lamy LPSC, Grenoble
	Efficient and fast charge state breeding is an important parameter for the acceleration of radioactive ions at ISOL facilities. Most on-line ion sources produce only singly charged ions but efficient accelerators require high charge states. Tests of an ECRIS as charge breeder (14 GHz PHOENIX from Pantechnik) have been performed on a test bench at TRIUMF mainly focussing on the optimization of the efficiency and breeding time. After this the source has been moved on-line to the ISAC facility. Mass separated beams of radioactive ions from the on-line ion sources can be directed into the source as well as ions from a Cs test ion source. The latter will be used for commissioning the system and setting up and optimizing the performance of the source as well as the transport of the highly charged ions to the accelerator. A summary of the results obtained at the test bench and first results from the on line commissioning will be presented.
	Slides
WECO-A03	Initial Results of the ECR Charge Breeder for the 252Cf Fission Source Project (CARIBU) at ATLAS	184
	R. C. Vondrasek, J. R. Carr, R. C. Pardo, R. H. Scott ANL, Argonne, Illinois
	Funding: This work was supported by the U. S. Department of Energy, Office of Nuclear Physics, under Contract No. DE-AC02-06CH11357. The construction of the Californium Rare Ion Breeder Upgrade (CARIBU), a new radioactive beam facility for the Argonne Tandem Linac Accelerator System (ATLAS), is in progress. The facility will use fission fragments from a 1 Ci 252Cf source; thermalized and collected into a low-energy particle beam by a helium gas catcher. In order to reaccelerate these beams, the existing ATLAS ECR1 ion source has been redesigned to function as a charge breeder source. An additional high voltage platform has been constructed to accommodate a low charge state stable beam source for charge breeding development work. The design features and initial results of this charge breeder configuration will be discussed.
	Slides