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Development of a pepper-pot device to determine the emittance of an ion beam generated by electron cyclotron resonance ion sources

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6 Author(s)
Strohmeier, M. ; Lawrence Berkeley National Laboratory, One Cyclotron Road, Berkeley, California 94720, USA ; Benitez, J.Y. ; Leitner, D. ; Lyneis, C.M.
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This paper describes the recent development and commissioning of a pepper-pot emittance meter at the Lawrence Berkeley National Laboratory (LBNL). It is based on a potassium bromide (KBr) scintillator screen in combination with a charged coupled device camera. Pepper-pot scanners record the full four-dimensional transverse phase space emittances which are particularly interesting for electron cyclotron resonance ion sources. The strengths and limitations of evaluating emittances using optical pepper-pot scanners are described and systematic errors induced by the optical data acquisition system will be presented. Light yield tests of KBr exposed to different ion species and first emittance measurement data using ion beams extracted from the 6.4 GHz LBNL electron cyclotron resonance ion source are presented and discussed.

Published in:

Review of Scientific Instruments  (Volume:81 ,  Issue: 2 )