Abstracts Brochure - CERN

THPLS — Poster Session 29-Jun-06 16:00 - 18:00
Ground Vibration Measurement at NSRRC Site
For the future 3GeV TPS project in the
NSRRC, ground vibration would be impor- D.-J. Wang, J.P. Wang, J. Wang (NSRRC) J.-R. Chen (NTHU)
tant for this low emittance machine. We have
monitored the ground vibration under various experimental conditions at the NSRRC site. Sensors were installed in
the bare site, underground 35 meters deep and ground of TLS storage ring, including an electricity shutdown in the
NSRRC. From the collected data, we compare the effect about day and night, traffic effect, internal machine vibration
propagation. Specific vibration sources and their propagations are also discussed.
Progress of NESTOR Design and Development
Over the past year the design, development
and construction of NSC KIPT X-ray generator
NESTOR has been in progress. NESTOR
is a new type radiation source on the base
of Compton scattering and a 40 - 225 MeV
electron storage ring. Electrons are injected
in the storage ring at 100 MeV and ramped
up to final energy 225 MeV. It is supposed
that stored electron beam current will be of
A.Y. Zelinsky, V.P. Androsov, E.V. Bulyak, A. Dovbnya, I.V.
Drebot, P. Gladkikh, V.A. Grevtsev, Yu.N. Grigor’ev, A. Gvozd, V.E.
Ivashchenko, I.M. Karnaukhov, N. Kovalyova, V.P. Kozin, V. Lapshin,
V. Markov, N.I. Mocheshnikov, A. Mytsykov, I.M. Necklyudov,
F.A. Peev, O.V. Ryezayev, A.A. Shcherbakov, V.L. Skirda, Y.N. Telegin,
V.I. Trotsenko, O.D. Zvonarjova (NSC/KIPT) A. Agafonov, A.N.
Lebedev (LPI) J.I.M. Botman (TUE) R. Tatchyn (SLAC)
about 200 mA. Along with use of Nd:Yag laser of 10 W average power which was developed by High-Q laser firm
and optical resonator with accumulation gain of about 1000 it allows to provide X-ray radiation flux up to 1011 phot/
s. NESTOR is the cooperative facility and is supported both as well Ukrainian government as NATO SfP project
#977982. It is supposed that NESTOR will be in operation in the middle of 2007 year. The status of the project and
main facility systems are described in the report.
Status of RF Deflecting Cavity Design for the Generation of Short X-ray Pulses in the Advanced
Photon Source Storage Ring
The Advanced Photon Source (APS) at Argonne
National Laboratory is exploring the
possibility of using radio frequency deflection
to generate x-ray radiation pulses on the
G.J. Waldschmidt, M. Borland, Y.-C. Chae, K.C. Harkay, D. Horan,
A. Nassiri (ANL)
order of 1 pico-second (Delta t - 70%) or less*. This scheme is based on a proposal by A. Zholents et al.** that relies
on manipulating the transverse momenta of the electrons in a bunch by using an rf deflecting cavity to induce a
longitudinally dependent vertical deflection of the beam. The beam will then travel through a number of undulators
before arriving at a second set of deflecting cavities where the deflection is reversed such that the remainder of the
storage ring is largely unperturbed***. Considerable effort has been expended on the design of a superconducting rf
deflecting cavity operating in the S-Band at 2.8 GHz to address fundamental design issues including cavity geometry,
deflecting voltage, rf power coupling, tuning, and damping of higher-order and lower-order modes. In this paper
we present simulation results and analysis of an optimized superconducting rf deflecting cavity design for the APS
storage ring.
*K. Harkay et al. Proceedings of 2005 PAC, Knoxville, TN, May 2005, p. 668. **A. Zholents et al. Nucl. Instrum.
Methods, A425, 385 (1999). ***M. Borland and V. Sajaev. Proceedings of 2005 PAC, Knoxville, TN, May 2005, p. 3886.
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