Abstracts Brochure - CERN

THPLS — Poster Session 29-Jun-06 16:00 - 18:00
well taken care of. The contributions of these effects to vertical beam size increase will be evaluated and the counter
measures to minimize them will be proposed and reported in this paper.
Design of Taiwan Future Synchrotron Light Source
We report updated design works for a new 3-
3.3 GeV synchrotron light source with a high
performance and low emittance storage ring,
called Taiwan Photon Source (TPS). With its
C.-C. Kuo, H.-P. Chang, C.-T. Chen, P.J. Chou, G.-H. Luo, H.-J. Tsai,
M.-H. Wang (NSRRC)
natural horizontal emittance less than 2 nm-rad and low emittance coupling, TPS will be able to provide an extremely
bright photon beam to the demanding users, especially the x-ray community. The lattice type of the TPS is a 24-cell
DBA structure and the circumference is 518.4 m. We present the lattice design, the accelerator physics issues and its
performances.
Preliminary Design of the TPS Linac to Booster Transfer Line
The preliminary design of the LTB (linac to
booster) transfer line of the proposed TPS
(Taiwan Photon Source) project is considered
in this study. The layout presented in this
Y.-C. Liu, C.-S. Fann, K.-T. Hsu, S.Y. Hsu, J.-Y. Hwang, K.-K. Lin,
K.-B. Liu, G.-H. Luo (NSRRC)
report is based on the booster lattice and the choice of linac parameters. These parameters are adopted from previous
report of booster design and typical commercial available products of linac. The simulation result indicates that the
desired optical functions at a given location can be readily obtained by varying the appropriate focusing strength of
quadrupoles. It provides tuning capability to match various possible options of optical functions at injection location.
This report is presented together with design consideration of a set of beam diagnostics instruments.
The Implementation and Status of Quasi-constant Current Operation at the Taiwan Light
Source
Quasi-constant current operation, top-off injection,
is an operation mode in which the
beam current in the storage ring is maintained
above a certain level by frequent injections.
The routine current stability is in
G.-H. Luo, H.-P. Chang, J.-C. Chang, C.-T. Chen, J. Chen, C.-S. Fann,
K.-T. Hsu, C.-S. Hwang, C.-K. Kuan, C.-C. Kuo, K.-B. Liu, Y.-C. Liu,
R.J. Sheu, T.-S. Ueng, D.-J. Wang, M.-H. Wang (NSRRC)
the range of 10 -3 for long period of operation. The top-off injection provides much more flexibility in operation such
as lower emittance, higher current, smaller coupling, smaller ID gaps, exotic bunch filling patterns, and higher bunch
charge. It also provides constant thermal loading on all components in the storage ring and the optics components
of beamlines, as well as constant signal to the beam position monitor. During the last two years, a series of beam
parameters measurement, subsystem checkout, installing various sensors, control program modification and hardware
upgrade made the top-off injection possible in practical routine operation. Discussions on the results of some
measurements of booster and storage ring, the requirement of hardware upgrade and the summary of routine top-off
operation will be presented in this paper.
467
THPLS068
THPLS069
THPLS070