CERN Accelerating science

Article
Report number	arXiv:1409.2727
Title	High Performance Charge Breeder for HIE-ISOLDE and TSR@ISOLDE Applications
Related title	High Performance Charge Breeder for HIE-ISOLDE and TSR@ISOLDE Applications
Author(s)	Shornikov, Andrey (CERN) ; Beebe, Edward N. (Brookhaven Natl. Lab.) ; Mertzig, Robert C. (CERN) ; Pikin, Alexander (Brookhaven Natl. Lab.) ; Wenander, Fredrik J.C. (CERN)
Publication	2015-02-17
Imprint	09 Sep 2014
Number of pages	9
Note	Comments: 9 pages, 8 figures, EBIST14 conference paper 9 pages, 8 figures, EBIST14 conference paper Comments: 9 pages, 8 figures, EBIST14 conference paper
In:	AIP Conf. Proc. 1640 (2015) 19-27
In:	12th International Symposium on Electron Beam Ion Sources and Traps and Their Applications, East Lansing, MI, USA, 18 - 21 May 2014, pp.19-27
DOI	10.1063/1.4905396
Subject category	Accelerators and Storage Rings
Accelerator/Facility, Experiment	CERN ISOLDE
Project	CERN HIE-ISOLDE
Abstract	We report on the development of the HEC2 (High Energy Compression and Current) charge breeder, a possible high performance successor to REXEBIS at ISOLDE. The new breeder would match the performance of the HIE-ISOLDE linac upgrade and make full use of the possible installation of a storage ring at ISOLDE (the TSR@ISOLDE initiative [1]). Dictated by ion beam acceptance and capacity requirements, the breeder features a 2-3.5 A electron beam. In many cases very high charge states, including bare ions up to Z=70 and Li/Na-like up to Z=92 could be requested for experiments in the storage ring, therefore, electron beam energies up to 150 keV are required. The electron-beam current density needed for producing ions with such high charge states at an injection rate into TSR of 0.5-1 Hz is between 10 and 20 kA/cm2, which agrees with the current density needed to produce A/q<4.5 ions for the HIE-ISOLDE linac with a maximum repetition rate of 100 Hz. The first operation of a prototype electron gun with a pulsed electron beam of 1.5 A and 30 keV was demonstrated in a joint experiment with BNL [2]. In addition, we report on further development aiming to achieve CW operation of an electron beam having a geometrical transverse ion-acceptance matching the injection of 1+ ions (11.5 {\mu}m), and an emittance/energy spread of the extracted ion beam matching the downstream mass separator and RFQ (0.08 {\mu}m normalized / +/- 1% ).
Copyright/License	arXiv nonexclusive-distrib. 1.0

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