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@PHDTHESIS{Slim:748558,
author = {Slim, Jamal},
othercontributors = {Heberling, Dirk and Hameyer, Kay and Pretz, Jörg Johannes},
title = {{A} novel waveguide {RF} {W}ien filter for electric dipole
moment measurements of deuterons and protons at the {CO}oler
{SY}nchrotron ({COSY})/{J}ülich},
school = {Rheinisch-Westfälische Technische Hochschule Aachen},
type = {Dissertation},
address = {Aachen},
reportid = {RWTH-2018-229484},
pages = {1 Online-Ressource (VIII, 150 Seiten : Illustrationen},
year = {2018},
note = {Veröffentlicht auf dem Publikationsserver der RWTH Aachen
University. - Ausgezeichnet mit der Borchers-Plakette und
dem Friedrich-Wilhelm-Preis 2019.; Dissertation,
Rheinisch-Westfälische Technische Hochschule Aachen, 2018},
abstract = {The matter-antimatter asymmetry in the universe cannot be
explained by the level of predicted CP-violation sources in
the Standard Model (SM) of particles. As a possible
explanation, is the existence of permanent electric dipole
moment (EDM) as a fundamental property of particles. The
search for EDM of charged particles requires a dedicated
all-electric storage ring, an option that is not available
at the moment. Therefore, the JEDI (Jülich Electric Dipole
moment Investigations) collaboration has decided to equip
the existing magnetic storage ring, the COoler SYnchrotron
(COSY), with a novel device called the radio frequency (RF)
Wien filter to conduct the first ever EDM measurement of
deuterons and protons. The RF Wien filter is a device, that
is able of generating an EDM signal proportional to the spin
precession of particles. This thesis is concerned with the
design, simulation, analysis, realization and commissioning
of the RF Wien filter. Similar to the classical Wien filter,
the RF Wien filter is an electromagnetic device that
generates orthogonal fields with a well-defined ratio
between the electric and magnetic field. These conditions
lead to a vanishing Lorentz force, thus the device
does/should not introduce any beam distortion. Secondly, it
is a spin sensitive device; it operates at the resonant spin
precession frequencies at which, the influence of the RF
Wien filter on the particles' spin is maximized. Moreover,
high field homogeneity is sought as inhomogeneities lead to
a fake EDM signal. These requirements are found to be met by
the waveguide based RF Wien filter. Full-wave simulations
have been conducted to design and optimize the
full-structure including the mechanical parts. Nearly
vanishing Lorentz force with high field homogeneities have
been achieved. Analysis of mechanical tolerances and
misalignments have been included in the calculations. The RF
driving circuit worked well and fulfilled its requirements
in terms of adapting the magnitude and phase of the field
quotient. The device has been successfully commissioned with
proton beam measurements. With excited impedance mismatch,
it was possible to drive beam oscillations from 0 up to 25
µm.},
cin = {613110},
ddc = {621.3},
cid = {$I:(DE-82)613110_20140620$},
typ = {PUB:(DE-HGF)11},
doi = {10.18154/RWTH-2018-229484},
url = {https://publications.rwth-aachen.de/record/748558},
}
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