IPAC2015 - List of Authors (Mey, S.)

Paper	Title	Page
THPF029	Preparation of an Ion Source for an Extra Low Energy Synchrotron	3755
	R. Gebel, O. Felden, R. Maier, S. Mey, D. Prasuhn FZJ, Jülich, Germany
	Funding: The work is supported within the framework of the Helmholtz Association’s Accelerator Research and Development (ARD) program. ELENA* is a compact ring for cooling and further deceleration of 5.3 MeV antiprotons delivered by the CERN Antiproton Decelerator (AD) down to 100 keV. Because of the long AD cycle of 100 s, it is foreseen to use a source for protons and H⁻ with a kinetic energy of 100 keV for commissioning and start-ups. The source, designed to provide 0.2 to 2.0μsec pulses with 3x10⁷ ions, is based on a proven multicusp volume source used at the COSY/Jülich** injector cyclotron. The source and its auxiliaries were refurbished, upgraded to ±100 keV operation at the Forschungszentrum Jülich and have been set in operation at CERN in April 2015 for first tests of new equipments. * V. Chohan [ed.], ELENA ring and its Transfer Lines – Design Report Geneva 2014, DOI 10.5170/CERN-2014-002 ** R. Maier Nucl. Instr. Meth. A 390 (1997) P.1.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2015-THPF029
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THPF031	Towards an RF Wien-Filter for EDM Experiments at COSY	3761
	S. Mey, R. Gebel FZJ, Jülich, Germany
	Funding: The work is supported within the framework of the Helmholtz Association’s Accelerator Research and Development (ARD) program. The JEDI Collaboration (Jülich Electric Dipole Moment (EDM) Investigations) is developing tools for the measurement of permanent EDMs of charged, light hadrons in storage rings. The Standard Model predicts unobservably small values for the EDM, but a non-vanishing EDM can be detected by measuring a tiny build-up of vertical polarization in a beforehand horizontally polarized beam. This technique requires a spin tune modulation by an RF Dipole without any excitation of beam oscillations. In the course of 2014, a prototype RF ExB-Dipole has been successfully commissioned and tested. To determine the characteristics of the device, the force of a radial magnetic field is canceled out by a vertical electric one. In this configuration, the dipole fields form a Wien-Filter that directly rotates the particles' polarization vector. We verified that the device can be used to continuously flip the vertical polarization of a 970 MeV(c deuteron beam without exciting any coherent beam oscillations. For a first EDM Experiment, the RF ExB-Dipole in Wien-Filter Mode is going to be rotated by 90° around the beam axis and will be used for systematic investigations of sources for false EDM signals.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2015-THPF031
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

Paper

Title

Page

Preparation of an Ion Source for an Extra Low Energy Synchrotron

3755

R. Gebel, O. Felden, R. Maier, S. Mey, D. Prasuhn
FZJ, Jülich, Germany

Funding: The work is supported within the framework of the Helmholtz Association’s Accelerator Research and Development (ARD) program.
ELENA* is a compact ring for cooling and further deceleration of 5.3 MeV antiprotons delivered by the CERN Antiproton Decelerator (AD) down to 100 keV. Because of the long AD cycle of 100 s, it is foreseen to use a source for protons and H⁻ with a kinetic energy of 100 keV for commissioning and start-ups. The source, designed to provide 0.2 to 2.0μsec pulses with 3x10⁷ ions, is based on a proven multicusp volume source used at the COSY/Jülich** injector cyclotron. The source and its auxiliaries were refurbished, upgraded to ±100 keV operation at the Forschungszentrum Jülich and have been set in operation at CERN in April 2015 for first tests of new equipments.
* V. Chohan [ed.], ELENA ring and its Transfer Lines – Design Report
Geneva 2014, DOI 10.5170/CERN-2014-002
** R. Maier Nucl. Instr. Meth. A 390 (1997) P.1.

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2015-THPF029

Export •

reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

THPF031

Towards an RF Wien-Filter for EDM Experiments at COSY

3761

S. Mey, R. Gebel
FZJ, Jülich, Germany

Funding: The work is supported within the framework of the Helmholtz Association’s Accelerator Research and Development (ARD) program.
The JEDI Collaboration (Jülich Electric Dipole Moment (EDM) Investigations) is developing tools for the measurement of permanent EDMs of charged, light hadrons in storage rings. The Standard Model predicts unobservably small values for the EDM, but a non-vanishing EDM can be detected by measuring a tiny build-up of vertical polarization in a beforehand horizontally polarized beam. This technique requires a spin tune modulation by an RF Dipole without any excitation of beam oscillations. In the course of 2014, a prototype RF ExB-Dipole has been successfully commissioned and tested. To determine the characteristics of the device, the force of a radial magnetic field is canceled out by a vertical electric one. In this configuration, the dipole fields form a Wien-Filter that directly rotates the particles' polarization vector. We verified that the device can be used to continuously flip the vertical polarization of a 970 MeV(c deuteron beam without exciting any coherent beam oscillations. For a first EDM Experiment, the RF ExB-Dipole in Wien-Filter Mode is going to be rotated by 90° around the beam axis and will be used for systematic investigations of sources for false EDM signals.

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2015-THPF031

Export •

reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)