This title appears in the Scientific Report :
2019
Please use the identifier:
http://hdl.handle.net/2128/24263 in citations.
Polarimeter Development for Electric Dipole Moment Measurements in Storage Rings
Polarimeter Development for Electric Dipole Moment Measurements in Storage Rings
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 w...
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Personal Name(s): | Müller, Fabian (Corresponding author) |
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Contributing Institute: |
Experimentelle Hadrondynamik; IKP-2 |
Imprint: |
Aachen
Universitätsbibliothek RWTH Aachen
2019
|
Physical Description: |
171 |
Dissertation Note: |
Dissertation, RWTH Aachen, 2019 |
Document Type: |
Dissertation / PhD Thesis |
Research Program: |
Search for electric dipole moments using storage rings Cosmic Matter in the Laboratory |
Link: |
OpenAccess OpenAccess |
Publikationsportal JuSER |
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. |