131 citations · 516 across the 21 of their papers we have counts for
14 papers · 1 filter
Maintaining a Resonance Condition of an RF Spin Rotator Through a Feedback Loop in a Storage Ring
V. Hejny, A. Andres, J. Pretz +63
This paper presents the successful application of a phase-lock feedback system to maintain the resonance condition of a radio frequency (rf) spin rotator (specifically, an rf Wien…
Spin decoherence and off-resonance behavior of radiofrequency-driven spin rotations in storage rings
N. N. Nikolaev, F. Rathmann, J. Slim +60
Radiofrequency-driven resonant spin rotators are routinely used as standard instruments in polarization experiments in particle and nuclear physics. Maintaining the continuous exac…
Spin Physics at COSY (2021-2024 and beyond) -- Pathfinder investigations toward an EDM storage ring and Spin-for-FAIR
R. Gebel, V. Hejny, A. Kacharava +24
The unique global feature of COSY is its ability to accelerate, store and manipulate polarized proton and deuteron beams. In the recent past, these beams have been used primarily f…
Beam-based alignment at the Cooler Synchrotron COSY as a prerequisite for an electric dipole moment measurement
T. Wagner, A. Nass, J. Pretz +47
The Jülich Electric Dipole moment Investigation (JEDI) collaboration aims at a direct measurement of the Electric Dipole Moment (EDM) of protons and deuterons using a storage ring.…
Influence of electron cooling on the polarization lifetime of a horizontally polarized storage ring beam
S. Karanth, E. Stephenson, A. Wronska +26
A previous publication has shown that the in-plane polarization (IPP) component of a polarized 0.97-GeV/c deuteron beam in the COSY storage ring may acquire a polarization half-lif…
Feasibility Study for an EDM Storage Ring
F. Abusaif, A. Aggarwal, A. Aksentev +92
This project exploits charged particles confined as a storage ring beam (proton, deuteron, possibly He) to search for an intrinsic electric dipole moment (EDM, ) aligne…
Phase Measurement for Driven Spin Oscillations in a Storage Ring
N. Hempelmann, V. Hejny, J. Pretz +65
This paper reports the first simultaneous measurement of the horizontal and vertical components of the polarization vector in a storage ring under the influence of a radio frequenc…
The connection between zero chromaticity and long in-plane polarization lifetime in a magnetic storage ring
G. Guidoboni, E. J. Stephenson, A Wrońska +40
In this paper, we demonstrate the connection between a magnetic storage ring with additional sextupole fields set so that the x and y chromaticities vanish and the maximizing of th…
Spin tune mapping as a novel tool to probe the spin dynamics in storage rings
A. Saleev, N. N. Nikolaev, F. Rathmann +61
Precision experiments, such as the search for electric dipole moments of charged particles using storage rings, demand for an understanding of the spin dynamics with unprecedented…
Phase locking the spin precession in a storage ring
N. Hempelmann, V. Hejny, J. Pretz +66
This letter reports the successful use of feedback from a spin polarization measurement to the revolution frequency of a 0.97 GeV/ bunched and polarized deuteron beam in the Coo…
New method for a continuous determination of the spin tune in storage rings and implications for precision experiments
D. Eversmann, V. Hejny, F. Hinder +98
A new method to determine the spin tune is described and tested. In an ideal planar magnetic ring, the spin tune - defined as the number of spin precessions per turn - is given by…
A Storage Ring Experiment to Detect a Proton Electric Dipole Moment
V. Anastassopoulos, S. Andrianov, R. Baartman +88
A new experiment is described to detect a permanent electric dipole moment of the proton with a sensitivity of cm by using polarized "magic" momentum ~GeV/c pr…
Toward polarized antiprotons: Machine development for spin-filtering experiments
C. Weidemann, F. Rathmann, H. J. Stein +54
The paper describes the commissioning of the experimental equipment and the machine studies required for the first spin-filtering experiment with protons at a beam kinetic energy o…
Measuring the Polarization of a Rapidly Precessing Deuteron Beam
Z. Bagdasarian, S. Bertelli, D. Chiladze +35
This paper describes a time-marking system that enables a measurement of the in-plane (horizontal) polarization of a 0.97-GeV/c deuteron beam circulating in the Cooler Synchrotron…