| Title |
Observation of Ion-induced Instabilities at NSLS2 Storage Ring |
| Authors |
- W.X. Cheng, Y. Li, B. Podobedov
BNL, Upton, Long Island, New York, USA
|
| Abstract |
NSLS2 storage ring has been commissioned and is open for user operations. At relatively low beam current (~ 25mA) multi-bunch fills, ion-induced instabilities have been observed. For the present user operations, 150mA of total beam current is filled in ~1000 bunches, fast ion is the dominant instability at the NSLS2 storage ring. Although the ion-induced dipole motions can be suppressed using bunch by bunch (BxB) feedback system and it is expected to decrease in severity as the vacuum conditioning progresses further, a thorough understanding and characterization of this effect is still important, especially in preparation to the future 500mA operations. A number of ion instability related studies, mostly parasitic to other machine activities, have been carried out at various fill patterns and beam currents. Preliminary measurement results are reported in this paper.
|
| Paper |
download TUPB086.PDF [1.046 MB / 5 pages] |
| Conference |
IBIC2015, Melbourne, Australia |
| Series |
International Beam Instrumentation Conference (4th) |
| Proceedings |
Link to full IBIC2015 Proccedings |
| Session |
Poster Session 2 |
| Date |
15-Sep-15 16:00–18:00 |
| Main Classification |
BPMs and Beam Stability |
| Keywords |
ion, feedback, betatron, storage-ring, vacuum |
| Publisher |
JACoW, Geneva, Switzerland |
| Editors |
Mark Boland (SLSA, Clayton, Australia); David Button (ANSTO, Menai, Australia); Kathleen Riches (SLSA, Clayton, Australia); Volker RW Schaa (GSI, Darmstadt, Germany) |
| ISBN |
978-3-95450-176-2 |
| Published |
January 2016 |
| Copyright |
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