Abstracts Brochure - CERN

THPLS122
THPLS123
THPLS124
29-Jun-06 16:00 - 18:00 THPLS — Poster Session
Investigations of the Thermal Beam Load of a Superconducting In-vacuum Undulator
S. Casalbuoni, MH. Hagelstein, B.K. Kostka, R. Rossmanith (FZK)
T. Baumbach, A. Bernhard, D. Wollmann (University of Karlsruhe)
E. Steffens, M. Weisser (Erlangen University)
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The possible beam heating mechanisms in
superconducting cold bore in-vacuum undulators
are the resistive wall effect, the electron
cloud, and the synchrotron radiation both
from upstream magnets and the radiation
produced in the undulator itself. It is shown that the heating by the synchrotron radiation of upstream magnets
dominates for the superconducting in-vacuum undulator installed at the synchrotron radiation facility ANKA. With
the present existing collimator system in front of the undulator and a gap width of 8 mm, the heat load is about 1
W for an electron beam current of 100 mA and a beam energy of 2.5 GeV. A more sophisticated collimator system is
under consideration, which has the potential to reduce this value further.
One Year Experience with a Supeconducting Undulator in the Storage Ring ANKA
R. Rossmanith, S. Casalbuoni, MH. Hagelstein, B.K. Kostka (FZK)
T. Baumbach, A. Bernhard, D. Wollmann (University of Karlsruhe)
E. Steffens, M. Weisser (University of Erlangen-Nürnberg,
Physikalisches Institut II)
In ANKA the worldwide first superconducting
undulator demonstrator designed for a
storage ring was operated during the last
year. The undulator has 100 periods and a
period length of 14 mm. During the first
year the heat transfer from the beam to the
cold bore was investigated and the spectra and the electrical tunability together with a monochromator was measured.
The results are so encouraging that plans exist to equip ANKA with two more undulators, one with the opportunity
to double electrically the period length and one with electrically variable polarization direction.
The Second Generation of Superconductive Insertion Devices for ANKA
A. Bernhard, T. Baumbach, D. Wollmann (University of Karlsruhe)
S. Casalbuoni, MH. Hagelstein, B.K. Kostka, R. Rossmanith (FZK) E.
Steffens, M. Weisser (University of Erlangen-Nürnberg, Physikalisches
Institut II)
After the superconducting undulator SCU14
was installed and successfully started operation
at ANKA in spring 2005, a second
generation of superconducting insertion devices
for ANKA is under development. The
ANKA soft x-ray analytics beamline WERA
is planned to be equipped with a superconducting elliptically polarising undulator (SCEPU) with electrically tunable
polarisation, and a superconducting combined undulator/wiggler (SCUW) capable of period doubling will serve as
the source for the planned ANKA imaging beamline. In this contribution results of new design studies for the ANKA
superconducting EPU will be presented and the status of the SCUW-project will be reviewed.