Abstracts Brochure - CERN

TUPLS050
TUPLS051
TUPLS052
TUPLS053
27-Jun-06 16:00 - 18:00 TUPLS — Poster Session
The Development of SFRFQ Structure in Peking University
X.Q. Yan, J.-E. Chen, J.X. Fang, Z.Y. Guo, Y.R. Lu, Z. Wang (PKU/
IHIP)
234
The accelerating field in the conventional
RFQ is originated by the surface modulation
of the quadruple electrodes. However, the
axial accelerating field generated in this way
is quite limited. To enhance the energy gain, an alternative structure called Separated Function RFQ (SFRFQ) was
proposed. The principles of the structure had been proved by simulations and model measurements. To further
explore the feasibility of SFRFQ, a 10 cell SFRFQ cavity was built and power test was carried out. All the preliminary
results of the power test are presented and discussed in the paper.
Development of PEFP 20 MeV Proton Accelerator
Y.-S. Cho, H.M. Choi, S.-H. Han, I.-S. Hong, J.-H. Jang, H. S. Kim,
K.Y. Kim, Y.-H. Kim, H.-J. Kwon, K.T. Seol, Y.-G. Song (KAERI)
A 20 MeV proton accelerator has been developed
as a low energy part of PEFP (Proton
Engineering Frontier Project) 100 MeV accelerator.
The 20 MeV accelerator consists of ion
source, LEBT (Low Energy Beam Transport), 3 MeV RFQ (Radiofrequency Quadrupole) and 20 MeV DTL (Drift Tube
Linac). After the field tuning and high power RF conditioning of the accelerating cavities, the first beam test of the 20
MeV accelerator is underway. During the test, the pulsed proton beam was extracted from the ion source by pulsing
the high voltage power supply. Two 1.1 MW, 350MHz RF systems were used to drive the 20 MeV accelerator. The
current transformers between DTL tanks and Faraday cup at the end of 20 MeV DTL were used to measure the beam
current. In this paper, the development of 20MeV accelerator are summarized and the first beam test results are
discussed.
Beam Dynamics of the PEFP Linac
The PEFP Linac consists of a 50 keV ion
J.-H. Jang, Y.-S. Cho, K.Y. Kim, Y.-H. Kim, H.-J. Kwon (KAERI) source, LEBT, 3 MeV RFQ, 20 MeV DTL
called DTL1, MEBT, and 100 MeV DTL called
DTL2. The MEBT includes two small DTL tanks, which match the 20 MeV proton beams into the DTL2, and a bending
magnet, which extracts the 20 MeV proton beams to the experimental hall. We will present the full beam dynamics
study from the entrance of the DTL1 to the end of DTL2 with the initial beam parameters obtained from a simulation
study of the RFQ. Our study focuses on the longitudinal beam matching in order to compensate the missing RF effect
between every neighboring DTL tanks as well as the full beam matching between DTL1 and DTL2.
Beam Dynamics of a High Current IH-DTL Structure for the TWAC Injector
S. Minaev, T. Kulevoy, B.Y. Sharkov (ITEP) U. Ratzinger, R. Tiede
(IAP)
A powerful ion injector based on a laser ion
source is needed for an efficient operation of
the Tera Watt Accumulator (TWAC) complex
including a heavy ion synchrotron and a stor-
age ring, which is under progress now at ITEP, Moscow. The Interdigital H-type drift tube linac (IH-DTL) structure
operating at 162 MHz is proposed for the second stage of the injector linac behind of a 81 MHz RFQ. Consisting