First Observations of a {open_quotes}Fast Beam-Ion Instability{close_quotes}

Journal Article · Tue Jul 01 04:00:00 EDT 1997 · Physical Review Letters

DOI:https://doi.org/10.1103/PhysRevLett.79.79· OSTI ID:531889

Byrd, J; Thomson, J ^[1]; Chao, A; Heifets, S; Minty, M; Seeman, J; Stupakov, G; Zimmermann, F ^[2]; Raubenheimer, T O ^[3]

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1. Lawrence Berkeley National Laboratory, Berkeley, California 94720 (United States)
2. Stanford Linear Accelerator Center, Stanford, California 94309 (United States)
3. PS Division, CERN , CH-1211, Geneva 23 (Switzerland)

We report the results of observations of a new regime of ion instabilities at the Advanced Light Source (ALS). With artificially increased pressure and gaps in the bunch train large enough to avoid multiturn ion trapping, we observed a factor of 2{endash}3 increase in the vertical beam size along with coherent beam oscillations which increased along the bunch train. The observations are qualitatively consistent with the {open_quotes}fast beam-ion instability{close_quotes} [T.O. Raubenheimer and F. Zimmermann, Phys.Rev.E {bold 52}, 5487 (1995); G.V. Stupakov {ital et al.,} Phys.Rev.E {bold 52}, 5499 (1995)], which can arise even when the ions are not trapped over multiple beam passages. This effect may be important for many future accelerators. {copyright} {ital 1997} {ital The American Physical Society}

• Research Organization: Lawrence Berkeley National Laboratory
• DOE Contract Number: AC03-76SF00098; AC03-76SF00515
• OSTI ID: 531889
• Journal Information: Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 1 Vol. 79; ISSN 0031-9007; ISSN PRLTAO
• Country of Publication: United States
• Language: English

Related Subjects

43 PARTICLE ACCELERATORS
ACCELERATORS
BEAM BUNCHING
INSTABILITY
ION BEAMS
LIFETIME
OSCILLATIONS
STORAGE RINGS
TRAPPING