Abstracts Brochure - CERN

TUPCH — Poster Session 27-Jun-06 16:00 - 18:00
Operation Results of 1 MW RF Systems for the PEFP 20MeV Linac
The PEFP 20 MeV linear accelerator is composed
of a 3 MeV RFQ and 20 MeV DTL. Two K.T. Seol, Y.-S. Cho, H. S. Kim, H.-J. Kwon (KAERI) K.R. Kim (PAL)
sets of 1MW, 350MHz RF systems drive the
RFQ and DTL. The RF system can perform a 100% duty operation. The TH2089F klystron is used as an RF source.
During the test operation, only the driving RF signal of the klystron was operated in pulse mode, while the electron
beam was maintained in DC mode. The klystron power supplies and cooling systems were also operated in 100%
duty mode. In this paper, the operation results of 1 MW RF systems including klystron power supply and cooling
system are discussed and propose possible options to improve the operation conditions based on the results.
Status of 30 GHz High Power RF Pulse Compressor for CTF3
A 70 ns 30 GHz pulse compressor with resonant
delay lines has been built and installed I. Syratchev, W. Wuensch (CERN)
in the CTF3 test area to obtain the high peak
power of 150 MW necessary to demonstrate the full performance of the new CLIC accelerating structure. This pulse
compressor will be commissioned at high power in 2006. Different methods to provide fast RF phase switching are
discussed. The current status of the CTF3 RF pulse compressor commissioning and first results are presented.
Ka-band Test Facility for High-gradient Accelerator R&D
Achievement of high acceleration gradients
in room-temperature structures requires basic
studies of electric and magnetic RF field
limits at surfaces of conductors and dielectrics.
Facilities for such studies at 11.4
GHz have been in use at KEK and SLAC; facilities
for studies at 17.1 GHz are being developed
at MIT and UMd; and studies at 30
J.L. Hirshfield, J.L. Hirshfield, E.V. Kozyrev, M.A. LaPointe (Yale
University, Physics Department) A.A. Bogdashov, A.V. Chirkov,
G.G. Denisov, A.S. Fix, D.A. Lukovnikov, V.I. Malygin, Yu.V.
Rodin, M.Y. Shmelyov (IAP/RAS) S.V. Kuzikov, A.G. Litvak, O.A.
Nezhevenko, M.I. Petelin, V.P. Yakovlev (Omega-P, Inc.) G.V. Serdobintsev
(BINP SB RAS) S.V. Shchelkunov (Columbia University)
GHz are being conducted at CERN using the CLIC drive beam to generate short intense RF pulses. Longer pulse
studies at 34 GHz are to be carried out at a new test facility being established at the Yale Beam Physics Laboratory,
built around the Yale/Omega-P 34-GHz magnicon. This high-power amplifier, together with an available ensemble of
components, should enable tests to be carried at up to about 9 MW in 1 mcs wide pulses at up to four output stations
or, using a power combiner, at up to about 35 MW in 1 mcs wide pulses at a single station. RF pulse compression
is planned to be used to produce 100-200 MW, 100 ns pulses; or GW-level, 1 mcs wide pulses in a resonant ring. A
number of experiments have been prepared to utilize multi-MW 34-GHz power for accelerator R&D, and users for
future experiments are encouraged to express their interest.
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