Abstracts Brochure - CERN

THPLS — Poster Session 29-Jun-06 16:00 - 18:00
Physical Requirement of the PLS-XFEL Undulator
Pohang Accelerator Laboratory(PAL)is planning
a 0.3nm SASE (Self Amplification of D.E. Kim, C.W. Chung, I.S. Ko, J.-S. Oh, K.-H. Park (PAL)
Spontaneous Emission) XFEL based on a
3.7GeV linear accelerator. For short saturation length, application of the SPring8 type in the vacuum undulator
is needed. This reflects the experiences from the Spring8 SCSS project. The end structures were designed to be asymmetric
along the beam direction to ensure systematic zero 1st field integral. The thickness of the last magnets was
adjusted to minimize the transition distance to the fully developed periodic field. This approach is more convenient
to control than adjusting the strength of the end magnets. The final design features 4mm minimum pole gap, 15mm
period, and peak effective field of 1.09 Tesla. In this article, the physical design of the undulator, the design of the
end structure, and the physics requirements of the undulator system will be presented.
Simulations of Electromagnetic Undulator for Far Infrared Coherent Source of TTF at
DESY
A perspective extension of the VUV FEL user
facility at DESY is infrared coherent source
on the base of electromagnetic undulator.
The undulator consists of 9 periods, period
E. Syresin, V.V. Borisov, E.A. Matushevsky, N.A. Morozov (JINR)
O. Grimm, M.V. Yurkov (DESY) J. Rossbach (Uni HH)
length is 40 cm long, and peak magnetic field is up to 1.2 T. With the energy of electron beam of 500 MeV maximum
radiation wavelength is about 200 mkm. An important feature of the beam formation system of the VUV FEL is the
possibility to produce ultra-short, down to 50 mkm rms electron bunches. Such short bunches produce powerful
coherent radiation with multi-megawatt power level. FIR coherent source operates in a parasitic mode utilizing
electron beam passed VUV undulator. Generation of two-colors by a single electron bunch reveals unique possibility
to perform pump-probe experiments with VUV and FIR radiation pulses. In this report we present simulations of
the undulator magnetic system and beam dynamics.
A General View of IDs to be Installed at ALBA at Day One
The new 3rd generation synchrotron radiation
source ALBA to be built nearby
Barcelona is planned to start operation in
2009 with several different insertion devices
J. Campmany, D. Bertwistle, D. Einfeld, J. Marcos, V. Massana
(ALBA) Z. Martí (LLS)
installed in the storage ring either from "day one" or within the first year of operation. The list of high-priority
insertion devices includes: 2 planar PPM SmCo in-vacuum undulators with the period of 21.3 mm; 2 Apple-II type
PPM NdFeB undulators with the period of 71 mm; 1 superconducting planar wiggler with the period of 30 mm and
a maximum field of 2 T, and a 1 conventional wiggler with the period of 65 mm and a maximum field of 1.55 T. The
emission of these undulators covers wide spectral range extending from hard X-rays to UV. Pre-design of the IDs was
done by ALBA. The construction will be done by industrial companies and institutions with production capabilities.
ALBA will set up a magnetic measurement laboratory for the acceptance tests. The paper will present peculiarities of
the magnetic design, calculated maximum-flux spectra and associated heat load in various modes of operation.
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