Abstracts Brochure - CERN

MOPCH063
MOPCH064
MOPCH065
26-Jun-06 16:00 - 18:00 MOPCH — Poster Session
Status of the Polarized Nonlinear Inverse Compton Scattering Experiment at UCLA
An Inverse Compton Scattering (ICS) exper-
O. Williams, A. Doyuran (UCLA)
iment investigating the polarized harmonic
production in the nonlinear regime has begun
which will utilize the existing terawatt CO2 laser system and 15 MeV photoinjector in the Neptune Laboratory at
UCLA. A major motivation for a source of high brightness polarized x-rays is the production of polarized positrons
for use in future linear collider experiments. Analytical calculations have been performed to predict the angular and
frequency spectrums for various polarizations and different scattering angles. The experiment has begun and we
report the set-up and current status. The advantages and limitations of using a high laser vector potential, ao, in an
ICS-based polarized positron source are expected to be revealed with further measurement of the harmonic spectrum
and angular characteristics.
The Specification, Design and Measurement of Magnets for the Energy Recovery Linac
Prototype (ERLP) at Daresbury Laboratory
F. Bødker (Danfysik A/S) N. Marks, N. Thompson (CCLRC/DL/
ASTeC)
64
The Energy Recovery Linac Prototype
(ERLP) is currently under construction at
Daresbury Laboratory in the UK and will
serve as a test bed for the investigation of
technologies and beam physics issues necessary for the development of Daresbury Laboratory’s Fourth Generation
Light Source (4GLS) proposal. A number of new ERLP beam transport system magnets have been procured for the
project. The magnets have been designed, manufactured and measured by Danfysik following a stringent magnetic
field specification produced by Daresbury Laboratory. In this paper we summarise the magnet specification. We
then present details of the magnetic and mechanical design of the magnets and finally discuss the measurement
techniques used to demonstrate that the field quality of the magnets satisfied the specification.
Fabrication and Installation of Superconducting Accelerator Modules for the ERL Prototype
(ERLP) at Daresbury Laboratory
P. vom Stein, S. Bauer, M. Pekeler, H. Vogel (ACCEL) R. Bate, C.D.
Beard, D.M. Dykes, P.A. McIntosh, B. Todd (CCLRC/DL/ASTeC)
Installation and commissioning of the superconducting
energy recovery linac(ERL) prototype
is under way at Daresbury Laboratory.
ACCEL have manufactured two super-
conducting accelerator modules for the injector and the linac, operating at 2K with 1.3 GHz TESLA type cavities. Each
module contains two cavities and is designed to provide an accelerating voltage of 25 MV in cw mode. This paper
presents details of the module fabrication, cavity preparation and performance results. An overview of the cryogenic
installations for the modules is given and status results of the commissioning are discussed.