Abstract
The JEDI (Jülich Electric Dipole Investigations) (http://collaborations.fz-juelich.de/ikp/jedi/) Collaboration aims to carry out a long term project for the measurement of the permanent electric dipole moments of charged particles in a storage ring. As a proof-of-concept, the COoler SYnchrotron (COSY) was equipped with a waveguide RF Wien filter designed to operate at some harmonics of the spin precession frequency ranging from 0.1 to 2 MHz. This device maintains the corresponding ratio between the RF electric and magnetic fields necessary not to induce any beam excitation and most importantly acts as a spin flipper. In the course of 2017, the waveguide RF Wien has been successfully commissioned and tested. The ability of the device to produce a Lorentz Force compensation and to rotate the particles’ polarization vector has been verified. Driven vertical spin oscillations and vertical polarization build-up has been observed. This short article briefly discusses the results of the Lorentz force measurements at 871 kHz.
This is a preview of subscription content, log in via an institution to check access.
Similar content being viewed by others
References
Maier, R.: Cooler synchrotron {COSY} — performance and perspectives. Nucl. Instrum. Methods Phys. Res., Sect. A 390(1–2), 1–8 (1997). https://doi.org/10.1016/S0168-9002(97)00324-0. http://www.sciencedirect.com/science/article/pii/S0168900297003240
Pozar, D.: Microwave Engineering. Wiley, New York (2004)
Slim, J.: A novel waveguide RF Wien filter for electric dipole moment measurements of deuterons and protons at the COoler SYnchrotron (COSY)/Jülich. Dissertation, RWTH Aachen University, Aachen. https://doi.org/10.18154/RWTH-2018-229484. https://publications.rwth-aachen.de/record/748558 (2018)
Slim, J., Gebel, R., Heberling, D., Hinder, F., Hölscher, D., Lehrach, A., Lorentz, B., Mey, S., Nass, A., Rathmann, F., Reifferscheidt, L., Soltner, H., Straatmann, H., Trinkel, F., Wolters, J.: Electromagnetic simulation and design of a novel waveguide rf wien filter for electric dipole moment measurements of protons and deuterons. Nucl. Instrum. Methods Phys. Res., Sect. A 828, 116–124 (2016). https://doi.org/10.1016/j.nima.2016.05.012. http://www.sciencedirect.com/science/article/pii/S0168900216303710
Slim, J., Rathmann, F., Heberling, D.: Computational framework for particle and spin simulations based on the stochastic galerkin method. Phys. Rev. E 96, 063301 (2017). https://doi.org/10.1103/PhysRevE.96.063301. https://link.aps.org/doi/10.1103/PhysRevE.96.063301
Slim, J., Rathmann, F., Nass, A., Soltner, H., Gebel, R., Pretz, J., Heberling, D.: Polynomial chaos expansion method as a tool to evaluate and quantify field homogeneities of a novel waveguide rf wien filter. Nucl. Instrum. Methods Phys. Res., Sect. A 859, 52–62 (2017). https://doi.org/10.1016/j.nima.2017.03.040. http://www.sciencedirect.com/science/article/pii/S0168900217303807
Weidemann, C., et al.: Toward polarized antiprotons: Machine development for spin-filtering experiments. Phys. Rev. ST Accel. Beams 18, 020101 (2015). https://doi.org/10.1103/PhysRevSTAB.18.020101. http://link.aps.org/doi/10.1103/PhysRevSTAB.18.020101
Acknowledgements
This work has been performed in the framework of the JEDI collaboration and is supported by an ERC Advanced-Grant of the European Union (Proposal No. 694340).
Author information
Authors and Affiliations
Consortia
Corresponding author
Additional information
This article is part of the Topical Collection on Proceedings of the 7th Symposium on Symmetries in Subatomic Physics (SSP 2018), Aachen, Germany, 10–15 June 2018
Edited by Hans Ströher, Jörg Pretz, Livia Ludhova and Achim Stahl
Rights and permissions
About this article
Cite this article
Slim, J., for the JEDI Collaboration. First commissioning results of the waveguide RF Wien filter. Hyperfine Interact 240, 7 (2019). https://doi.org/10.1007/s10751-018-1547-6
Published:
DOI: https://doi.org/10.1007/s10751-018-1547-6