| Title |
First Experimental Observations of the Plasma-Cascade Instability in the CeC PoP Accelerator |
| Authors |
- I. Petrushina
SUNY SB, Stony Brook, New York, USA
- Y.C. Jing, V. Litvinenko, J. Ma, I. Pinayev, G. Wang, Y.H. Wu
BNL, Upton, New York, USA
- V. Litvinenko
Stony Brook University, Stony Brook, USA
- K. Shih
SBU, Stony Brook, New York, USA
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| Abstract |
Preservation of the beam quality is important for attaining the desirable properties of the beam. Collective effects can produce an instability severely degrading beam emittance, momentum spread and creating filamentation of the beam. Microbunching instability for beams traveling along a curved trajectory, and space charge driven parametric transverse instabilities are well-known and in-depth studied. However, none of the above include a microbunching longitudinal instability driven by modulations of the transverse beam size. This phenomenon was observed for the first time during the commissioning of the CeC PoP experiment. Based on the dynamics of this instability we named it a Plasma-Cascade Instability (PCI). PCI can strongly intensify longitudinal micro-bunching originating from the beam’s shot noise, and even saturate it. Resulting random density and energy microstructures in the beam can become a serious problem for generating high quality electron beams. On the other hand, such instability can drive novel high-power sources of broadband radiation. In this paper we present our experimental observations of the PCI and the supporting results of the numerical simulations.
|
| Paper |
download TUPLM07.PDF [1.348 MB / 4 pages] |
| Poster |
download TUPLM07_POSTER.PDF [17.319 MB] |
| Export |
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| Conference |
NAPAC2019 |
| Series |
North American Particle Accelerator Conference (4th) |
| Location |
Lansing, MI, USA |
| Date |
01-06 September 2019 |
| Publisher |
JACoW Publishing, Geneva, Switzerland |
| Editorial Board |
Yoshishige Yamazaki (MSU, East-Lansing, MI, USA); Tor Raubenheimer (SLAC, Stanford, CA, USA); Amy McCausey (FRIB, East-Lansing, MI, USA); Volker RW Schaa (GSI, Darmstadt, Germany) |
| Online ISBN |
978-3-95450-223-3 |
| Online ISSN |
2673-7000 |
| Received |
27 August 2019 |
| Accepted |
05 September 2019 |
| Issue Date |
08 October 2019 |
| DOI |
doi:10.18429/JACoW-NAPAC2019-TUPLM07 |
| Pages |
379-382 |
| Copyright |
 Published by JACoW Publishing under the terms of the Creative Commons Attribution 3.0 International license. Any further distribution of this work must maintain attribution to the author(s), the published article's title, publisher, and DOI. |
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