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Title Space Charge Driven Beam Loss for Cooled Beams and Mitigation Measures in the CERN Low Energy Ion Ring
  • H. Bartosik, S. Hancock, A. Huschauer, V. Kain
    CERN, Geneva, Switzerland
Abstract The performance of the CERN Low Energy Ion Ring (LEIR) with electron cooled lead ion beams is presently limited by losses, which occur during RF capture and the first part of acceleration. Extensive experimental studies performed in 2015 indicate that the losses are caused by the interplay of betatron resonances and the direct space charge detuning, which is significantly enhanced during bunching. Mitigation measures have already been identified and successfully tested, such as reducing the peak line charge density after RF capture, i.e. increasing the rms longitudinal emittance, and compensating third order resonances using existing harmonic sextupole correctors. New record intensities at extraction have been achieved. This talk describes the main experimental results from the 2015 measurement campaign including already implemented mitigation measures and the proposed strategy for even further increasing the LEIR intensity reach in the future.
Paper download TUAM5X01.PDF [1.845 MB / 6 pages]
Slides download TUAM5X01_TALK.PDF [8.803 MB]
Conference HB2016, Malmö, Sweden
Series ICFA Advanced Beam Dynamics Workshop on High-Intensity and High-Brightness Hadron Beams (57th)
Proceedings Link to full HB2016 Proccedings
Session Working Group A - Session 3
Date 05-Jul-16   11:00–12:40
Main Classification Beam Dynamics in Rings
Keywords resonance, injection, ion, space-charge, sextupole
Publisher JACoW, Geneva, Switzerland
Editors Mohammad Eshraqi (ESS, Lund, Sweden); Garry Trahern (ESS, Lund, Sweden); Volker RW Schaa (GSI, Darmstadt, Germany)
ISBN 978-3-95450-185-4
Published August 2016
Copyright © 2016 by JACoW, Geneva, Switzerland     CC-BY Creative Commons License
cc Creative Commons Attribution 3.0