Abstracts Brochure - CERN

THPLS — Poster Session 29-Jun-06 16:00 - 18:00
is underway in order to find the location and the parameter range of the multipacting. In this paper we report the
experimental observations and results of the simulation relevant to the phenomena.
Design of a Fast Extraction Kicker for the Advanced Test Facility
We present a study for the design of a fast
extraction kicker to be installed in the Ad- S. De Santis, A. Wolski (LBNL) M.C. Ross (SLAC)
vanced Test Facility ring. The purpose of the
project is to test the technologies to be used in the design of the extraction kickers for the ILC damping rings. The
kicker’s rise and fall times are important parameters in the design of the damping rings, as they limit the minimum
distance between bunches and ultimately define a lower boundary for the ring length. We propose a stripline kicker
composed of several 20-cm long sections, grouped in two locations in the ATF damping ring. An analytical study of
the kicker’s parameters and computer simulations using Microwave Studio* point out the strict requirements on the
pulsers, in order to be able to satisfy the design parameters.
*http://www.cst.com
"CAMSHAFT" Bunch Kicker Design for the ALS Storage Ring
ALS is a 1.9 GeV third generation synchrotron
light source that has been operating
since 1992 at Lawrence Berkeley National
Laboratory. There are two typical modes of
S. Kwiatkowski, K.M. Baptiste, W. Barry, J. Julian, L. Low, D.W.
Plate, G.J. Portmann, D. Robin (LBNL)
operation of the ALS storage ring. In multibunch mode, the ring is filled to a current of 400 mA in 276 consecutive
bunches with a single "camshaft" bunch located in the middle of the 52 bucket gap (h=328). Twice each year, ALS
operates in "two-bunch" mode for periods of two weeks delivering 20 mA of average beam current in two diametrically
opposite bunches to a small group of users requiring light pulses at lower rates. We plan to build a fast kicker system
that will supply single bunch light to users during multibunch operation by displacing the orbit of the camshaft
bunch at a prescribed frequency (every N turns). Realization of this project will increase ALS beam availability to
multibunch users by at least 10%. This paper will describe the hardware design (pulse generator and beam deflection
device) and the test results of the prototype kicker unit.
Simulation and Optimisation of a 100MA DC Photo Injector
A prototype 100mA injector is presently being
designed and manufactured jointly be- F.E. Hannon, C. Hernandez-Garcia (Jefferson Lab)
tween Thomas Jefferson National Accelerator
Facility (J-Lab) and Advanced Energy Systems (AES). This paper discusses the physics optimisation and performance
of the injector, which has been studied using the space-charge tracking code ASTRA. The objective is to operate
the 7MeV injector with 135pC electron bunches at 748.5MHz repetition rate. We show that the longitudinal and
transverse electron bunch properties can be realised within the constraints of the design.
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THPLS113
THPLS114
THPLS115