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@InProceedings{blaskiewicz:napac2019-tuplm11,
author = {M. Blaskiewicz},
title = {{Beam-Beam Damping of the Ion Instability}},
booktitle = {Proc. NAPAC'19},
pages = {391--394},
paper = {TUPLM11},
language = {english},
keywords = {electron, simulation, storage-ring, damping, feedback},
venue = {Lansing, MI, USA},
series = {North American Particle Accelerator Conference},
number = {4},
publisher = {JACoW Publishing, Geneva, Switzerland},
month = {10},
year = {2019},
issn = {2673-7000},
isbn = {978-3-95450-223-3},
doi = {10.18429/JACoW-NAPAC2019-TUPLM11},
url = {http://jacow.org/napac2019/papers/tuplm11.pdf},
note = {https://doi.org/10.18429/JACoW-NAPAC2019-TUPLM11},
abstract = {Beam-Beam damping of the Ion Instability The electron storage ring of the proposed electron ion collider at BNL has bunch charges as large as 50 nC and bunch spacings as small as 10 ns. For molecules like CO a dangerous buildup of positive ions is possible and a significant fraction of these ions can survive allowable clearing gaps. The instability is thus multi-turn and the weak damping required to stop the ion instabilty with an ideal clearing gap is ineffective here. The beam-beam force is highly nonlinear and a potent source of tune spread. Simulations employing several macro-particles per electron bunch and several ion macroparticles are used to estimate maximum gas densities for some common molecules. A simplified model is introduced and compared with simulations.},
}