Abstracts Brochure - CERN

THPLS — Poster Session 29-Jun-06 16:00 - 18:00
Status of the Swiss Light Source
The Swiss Light Source (SLS) is a 3rd generation
synchrotron light source in operation A. Lüdeke, Å. Andersson, M. Böge, B. Kalantari, B. Keil, M. Pe-
since 2001. The paper will point out the redrozzi, T. Schilcher, V. Schlott, A. Streun (PSI)
cent activities to enhance machine operation
and provides an overview about the new beamlines currently under construction at the SLS.
Sub-picosecond X-ray Source FEMTO at SLS
The FEMTO source at the SLS (Swiss Light
Source) employs laser/e-beam ’slicing’ to
produce sub-picosecond x-ray pulses for
time resolved pump/probe experiments.
A. Streun, R. Abela, P. Beaud, M. Böge, D. Grolimund, G. Ingold, S.
Johnson, A. Keller, L. Rivkin, V. Schlott, T. Schmidt, L. Schulz (PSI)
The final design of the source, the status of construction and commissioning as well as the first experimental results
will be presented.
Nonlinear Beam Dynamics of TPS
A design study of 3.0 GeV high performance
low emittance storage ring Taiwan Photon
Source has been conducted recently The natural
emittance of the storage ring can be as
H.-P. Chang, P.J. Chou, C.-C. Kuo, G.-H. Luo, H.-J. Tsai, M.-H. Wang
(NSRRC)
low as 1.7 nm-rad in our design and its lattice structure is a 24-cell double bend achromat type with circumference of
518.4 m, which will be located in the existing NSRRC site in Hsinchu. The strong focusing requires strong aberration
correction with nonlinear sextupole magnets. The distribution of the sextupoles and number of families are studied
to ensure a good dynamic aperture. The nonlinear effects in both betatron and synchrotron motions are investigated.
Nonlinear beam dynamics effects in the presence of magnetic field imperfections as well as the insertion devices are
simulated. The physical aperture limitations are included in the study too, and the Touschek lifetime is calculated.
The tracking data are analyzed using frequency map analysis method and corresponding beam dynamics behavior
can be revealed more precisely.
Design Concept of the Vacuum System for the 3 GeV Taiwan Photon Source
The design concept of the vacuum system for
the electron storage ring of the Taiwan Photon
Source (TPS), 518.4 m in circumference,
is described. The vacuum system for the syn-
G.-Y. Hsiung, C.K. Chan, C.-H. Chang, H.P. Hsueh, T.L. Yang
(NSRRC) J.-R. Chen (NTHU)
chrotron light source not only meets the specifications of an electron beam energy of 3 GeV and a beam current at 400
mA but also provides a safety factor of 1.7 (∼ 500 mA) at 3.3 GeV at the upper bound. The vacuum system for the
storage ring is built with consideration of the following features: (1) Large aluminum bending chambers to simplify
the ultra-high vacuum (UHV) structure; (2) Absorbers located as far from the source as possible to reduce the heat
load and associated yield of photon stimulated desorption (PSD) as well as the photoelectron; (3) Vacuum pumps
located in the antechamber and closed to the absorbers to increase the localized pumping efficiency and to minimize
465
THPLS061
THPLS062
THPLS063
THPLS064