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@PHDTHESIS{Mller:867821,
author = {Müller, Fabian},
title = {{P}olarimeter {D}evelopment for {E}lectric {D}ipole
{M}oment {M}easurements in {S}torage {R}ings},
school = {RWTH Aachen},
type = {Dissertation},
address = {Aachen},
publisher = {Universitätsbibliothek RWTH Aachen},
reportid = {FZJ-2019-06431},
pages = {171},
year = {2019},
note = {Dissertation, RWTH Aachen, 2019},
abstract = {The Jülich Electric Dipole Investigation (JEDI)
collaboration aims at the measurement of a charged particle
Electric Dipole Moments (EDM) for protons and deuterons with
a statistical sensitivity of ~ 1E-29 ecm in a storage ring
based experiment. This should be achieved by an interaction
of the EDM with a radial electric field that causes a
horizontal polarization build-up in a previously vertically
polarized, coherent beam. To measure this minuscule
polarization build-up, a designated polarimeter based on
heavy LYSO crystals was developed. The polarimetry reaction
employed to measure the polarization is the elastic
scattering of polarized particles off an unpolarized carbon
target. The measured scattering asymmetry can be related to
the beam polarization if the analyzing power of the reaction
is known. This work consists of two major parts. In the
first part, the analysis of the database experiment, which
aimed at the measurement of the vector analyzing power for
the deuteron carbon elastic scattering reaction using seven
different beam energies, is presented. This experiment was
performed at the Cooler Synchrotron (COSY) accelerator
facility at the Forschungszentrum Jülich in Germany.
Different methods for the extraction of the scattering
asymmetry are presented and the result for the extracted
deuteron carbon vector analyzing power and the unpolarized
differential cross section for this reaction are given. In
the second part, the iterative development process of the
designated polarimeter is described in detail. For this
device, a modular approach was chosen based on individual
detector modules. These modules consist of an inorganic LYSO
scintillator crystal that is optically coupled to a SiPM
array that converts the scintillation light into an electric
signal that can be processed by fast flash-ADC. Multiple
properties of these modules such as resolution or linearity
were tested and proved the concept to be well suited for the
final designated polarimeter.},
cin = {IKP-2},
cid = {I:(DE-Juel1)IKP-2-20111104},
pnm = {612 - Cosmic Matter in the Laboratory (POF3-612) / srEDM -
Search for electric dipole moments using storage rings
(694340)},
pid = {G:(DE-HGF)POF3-612 / G:(EU-Grant)694340},
experiment = {EXP:(DE-Juel1)JEDI-20170712},
typ = {PUB:(DE-HGF)11},
url = {https://juser.fz-juelich.de/record/867821},
}