BIW2012 - List of Authors (Hao, Y.)

Paper	Title	Page
TUPG005	Feedback Systems for Suppressing the Kink Instability in an ERL-based Electron Ion Collider	139
	Y. Hao, V. Litvinenko, V. Ptitsyn BNL, Upton, Long Island, New York, USA
	Funding: Work supported by Brookhaven Science Associates, LLC under Contract No. DE-AC02-98CH10886 with the U.S. Department of Energy. The kink instability presents one of the limiting factors from achieving higher luminosity in an ERL based electron ion collider (EIC). We present two possible dedicated feedback systems to suppress the instability, both of which benefit from the latest development of beam instrumentation. The first takes advantage of the ﬂexibility of the linac-ring scheme to adjust the initial condition of the electron beam; the second uses a pickup and kicker setup with proper bandwidth on the ion ring. Both schemes raise the threshold of the kink instability dramatically and provide opportunities for higher luminosity. We studied the effectiveness of the systems and their dependence on the feedback parameters and beam parameters.

Paper

Title

Page

Feedback Systems for Suppressing the Kink Instability in an ERL-based Electron Ion Collider

139

Y. Hao, V. Litvinenko, V. Ptitsyn
BNL, Upton, Long Island, New York, USA

Funding: Work supported by Brookhaven Science Associates, LLC under Contract No. DE-AC02-98CH10886 with the U.S. Department of Energy.
The kink instability presents one of the limiting factors from achieving higher luminosity in an ERL based electron ion collider (EIC). We present two possible dedicated feedback systems to suppress the instability, both of which benefit from the latest development of beam instrumentation. The first takes advantage of the ﬂexibility of the linac-ring scheme to adjust the initial condition of the electron beam; the second uses a pickup and kicker setup with proper bandwidth on the ion ring. Both schemes raise the threshold of the kink instability dramatically and provide opportunities for higher luminosity. We studied the effectiveness of the systems and their dependence on the feedback parameters and beam parameters.