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Title: Recent Observations on a Horizontal Instability in the DAFNE Positron Ring

Abstract

A strong horizontal instability limits the maximum positron current storable in the DAFNE Phi-Factory. A powerful feedback system makes it possible to store and put in collision more than 1300 mA of positron current in 105-109 bunches. Nevertheless, a much higher current (>2.4A) has been successfully stored in the twin electron ring. Measurements have been carried out to understand the positron current limit and to characterize the behavior of the horizontal instability at high current with different bunch patterns. Grow/damp turn-by-turn data obtained by turning off the horizontal feedback have been acquired and analyzed. Spectral analysis and growth rates of the instability are shown. In particular, the -1 mode has strong evidence and fast growth rate. Its growth rate behavior is analyzed at different beam currents and bunch patterns.

Authors:
; ; ; ;
Publication Date:
Research Org.:
Stanford Linear Accelerator Center (SLAC)
Sponsoring Org.:
USDOE
OSTI Identifier:
878021
Report Number(s):
SLAC-PUB-11654
TRN: US0601795
DOE Contract Number:
AC02-76SF00515
Resource Type:
Conference
Resource Relation:
Conference: Prepared for Particle Accelerator Conference (PAC 05), Knoxville, Tennessee, 16-20 May 2005
Country of Publication:
United States
Language:
English
Subject:
43 PARTICLE ACCELERATORS; ACCELERATORS; BEAM CURRENTS; ELECTRON RINGS; FEEDBACK; INSTABILITY; POSITRONS; Accelerators,ACCPHY

Citation Formats

Drago, A., Zobov, M., /Frascati, Teytelman, D., and /SLAC. Recent Observations on a Horizontal Instability in the DAFNE Positron Ring. United States: N. p., 2006. Web.
Drago, A., Zobov, M., /Frascati, Teytelman, D., & /SLAC. Recent Observations on a Horizontal Instability in the DAFNE Positron Ring. United States.
Drago, A., Zobov, M., /Frascati, Teytelman, D., and /SLAC. Fri . "Recent Observations on a Horizontal Instability in the DAFNE Positron Ring". United States. doi:. https://www.osti.gov/servlets/purl/878021.
@article{osti_878021,
title = {Recent Observations on a Horizontal Instability in the DAFNE Positron Ring},
author = {Drago, A. and Zobov, M. and /Frascati and Teytelman, D. and /SLAC},
abstractNote = {A strong horizontal instability limits the maximum positron current storable in the DAFNE Phi-Factory. A powerful feedback system makes it possible to store and put in collision more than 1300 mA of positron current in 105-109 bunches. Nevertheless, a much higher current (>2.4A) has been successfully stored in the twin electron ring. Measurements have been carried out to understand the positron current limit and to characterize the behavior of the horizontal instability at high current with different bunch patterns. Grow/damp turn-by-turn data obtained by turning off the horizontal feedback have been acquired and analyzed. Spectral analysis and growth rates of the instability are shown. In particular, the -1 mode has strong evidence and fast growth rate. Its growth rate behavior is analyzed at different beam currents and bunch patterns.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Fri Jan 20 00:00:00 EST 2006},
month = {Fri Jan 20 00:00:00 EST 2006}
}

Conference:
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