Conference Presentation (Plenary/Keynote)

FZJ-2018-07137

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Commissioning of the RF Wien filter for a first deuteron EDM measurement at COSY / Jülich

Nass, A. (Corresponding author)FZJ*

2018

Abstract: The JEDI Collaboration (Jülich Electric Dipole Investigations) aims for a measurement of the electric dipole moments (EDMs) of Deuterons and Protons at the COoler SYnchrotron (COSY). To make this possible, a novel high precision waveguide RF Wien filter was installed in COSY inside a so-called low-beta section, to modulate the spin of deuterons and protons. With this device the force of the radial electric field iscanceled by the corresponding vertical magnetic force. So it is possible to directly manipulate the polarization vector of the particles without introducing any beam oscillations. The RF Wien filter has been designed tooperate at harmonics of the spin precession frequency ranging from 0.6 to 1.7 MHz. For systematic investigations of sources of false EDM signals, the waveguide RF Wien filter can be rotated by 90 degrees around the beamaxis. The results of several weeks of commissioning experiments at COSY with the RF Wien filter, including Lorentz force measurements, driven oscillations and the resonant build-up of vertical polarization will be presented. A series of test measurements similar to the the upcoming first Deuteron EDM measurement were performed as well.

Keyword(s): Nuclei and Particles (1st) ; Particle Physics (2nd)

---

Contributing Institute(s):

1. Experimentelle Hadrondynamik (IKP-2)

Research Program(s):

1. 612 - Cosmic Matter in the Laboratory (POF3-612) (POF3-612)
2. 631 - Accelerator R & D (POF3-631) (POF3-631)
3. srEDM - Search for electric dipole moments using storage rings (694340) (694340)

Experiment(s):

1. Jülich Electric Dipole moment Investigations

Appears in the scientific report 2018

---