Abstracts Brochure - CERN

THPLS — Poster Session 29-Jun-06 16:00 - 18:00
Characterization of the SPARC Photo-injector with the Movable Emittance Meter
As a first stage of the commissioning of
SPARC accelerator a complete characterization
of the photo-injector was planned. The
objective was the optimization of the RF-gun
and of the accelerator working point and,
L. Catani, E. Chiadroni, A. Cianchi (INFN-Roma II) M. Boscolo, M.
Castellano, G. Di Pirro, M. Ferrario, D. Filippetto, C. Vaccarezza
(INFN/LNF) P. Musumeci (INFN-Roma)
generally, a detailed study of the emittance compensation process that should provide the optimal value of emittance
at the end of the linac. For this purpose a novel beam diagnostic, consisting of a movable emittance measurement
system, was conceived, constructed, tested and preliminarily operated in 2005. This paper presents the results of the
measurements with the e-meter showing the characteristics and the performance of the SPARC photo-injector. The
results of studies of the emittance compensation process will be also discussed.
Possibility of the Beam Injection Using a Single Pulsed Sextupole Magnet in Electron
Storage Rings
Recently, we succeeded in the beam injection
using a single pulsed quadrupole mag- Y. Kobayashi, K. Harada (KEK)
net (PQM) at the Photon Factory Advanced
Ring (PF-AR). The PQM enables us to inject the beam into the storage ring without the local bump by several pulsed
dipole magnets. In addition, since the stored beam is not kicked when the beam passes through the magnetic center
of the PQM, we can avoid the coherent beam oscillation, which is often produced by the unclosed local bump. It is
important for the top-up injection in electron storage rings as synchrotron radiation sources. However, in the case of
the PQM, we have the problem that the beam profile slightly changes turn-by-turn after the excitation of the PQM. In
order to solve it, we investigated the possibility of the beam injection using a single pulsed sextupole magnet (PSM)
instead of the PQM. Here, we will present the simulation of the beam injection using the PSM.
Performance Test of RF Photocathode Gun at the PAL
A RF photo-cathode (RF PC) gun with 1.6
cell cavity is installed for the fs-FIR (Femtosecond
Far Infrared Radiation) facility being
built at the Pohang Accelerator Laboratory
J.H. Park, J.Y. Huang, C. Kim, I.S. Ko, Y.W. Parc, S.J. Park (PAL) X.J.
Wang (BNL)
(PAL). A short, intense, and low emittance electron beams are produced by the RF PC gun. Performance test of the
gun is done include the measurement of RF chraterizations such as a resonant frequency, a mode separation, and
etcs. The diagnostics of the beam according to the beam parameters such as phase, charge, and energy, and emittance
are done. In this article, we present the measurement results of the RF charaterizations and the beam parameter
diagnostics of the RF PC gun at the PAL.
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THPLS105
THPLS107
THPLS108