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Abstracts Brochure - CERN

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THPLS — Poster Session 29-Jun-06 16:00 - 18:00<br />

Physical Requirement of the PLS-XFEL Undulator<br />

Pohang Accelerator Laboratory(PAL)is planning<br />

a 0.3nm SASE (Self Amplification of D.E. Kim, C.W. Chung, I.S. Ko, J.-S. Oh, K.-H. Park (PAL)<br />

Spontaneous Emission) XFEL based on a<br />

3.7GeV linear accelerator. For short saturation length, application of the SPring8 type in the vacuum undulator<br />

is needed. This reflects the experiences from the Spring8 SCSS project. The end structures were designed to be asymmetric<br />

along the beam direction to ensure systematic zero 1st field integral. The thickness of the last magnets was<br />

adjusted to minimize the transition distance to the fully developed periodic field. This approach is more convenient<br />

to control than adjusting the strength of the end magnets. The final design features 4mm minimum pole gap, 15mm<br />

period, and peak effective field of 1.09 Tesla. In this article, the physical design of the undulator, the design of the<br />

end structure, and the physics requirements of the undulator system will be presented.<br />

Simulations of Electromagnetic Undulator for Far Infrared Coherent Source of TTF at<br />

DESY<br />

A perspective extension of the VUV FEL user<br />

facility at DESY is infrared coherent source<br />

on the base of electromagnetic undulator.<br />

The undulator consists of 9 periods, period<br />

E. Syresin, V.V. Borisov, E.A. Matushevsky, N.A. Morozov (JINR)<br />

O. Grimm, M.V. Yurkov (DESY) J. Rossbach (Uni HH)<br />

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<br />

radiation wavelength is about 200 mkm. An important feature of the beam formation system of the VUV FEL is the<br />

possibility to produce ultra-short, down to 50 mkm rms electron bunches. Such short bunches produce powerful<br />

coherent radiation with multi-megawatt power level. FIR coherent source operates in a parasitic mode utilizing<br />

electron beam passed VUV undulator. Generation of two-colors by a single electron bunch reveals unique possibility<br />

to perform pump-probe experiments with VUV and FIR radiation pulses. In this report we present simulations of<br />

the undulator magnetic system and beam dynamics.<br />

A General View of IDs to be Installed at ALBA at Day One<br />

The new 3rd generation synchrotron radiation<br />

source ALBA to be built nearby<br />

Barcelona is planned to start operation in<br />

2009 with several different insertion devices<br />

J. Campmany, D. Bertwistle, D. Einfeld, J. Marcos, V. Massana<br />

(ALBA) Z. Martí (LLS)<br />

installed in the storage ring either from "day one" or within the first year of operation. The list of high-priority<br />

insertion devices includes: 2 planar PPM SmCo in-vacuum undulators with the period of 21.3 mm; 2 Apple-II type<br />

PPM NdFeB undulators with the period of 71 mm; 1 superconducting planar wiggler with the period of 30 mm and<br />

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<br />

emission of these undulators covers wide spectral range extending from hard X-rays to UV. Pre-design of the IDs was<br />

done by ALBA. The construction will be done by industrial companies and institutions with production capabilities.<br />

ALBA will set up a magnetic measurement laboratory for the acceptance tests. The paper will present peculiarities of<br />

the magnetic design, calculated maximum-flux spectra and associated heat load in various modes of operation.<br />

485<br />

THPLS132<br />

THPLS133<br />

THPLS134

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