Bibliographic Details
| Title: |
Phase locking the spin precession in a storage ring |
| Authors: |
Hempelmann, N., Hejny, V., Pretz, J., Stephenson, E., Augustyniak, W., Bagdasarian, Z., Bai, M., Barion, L., Berz, M., Chekmenev, S., Ciullo, G., Dymov, S., Etzkorn, F. -J., Eversmann, D., Gaisser, M., Gebel, R., Grigoryev, K., Grzonka, D., Guidoboni, G., Hanraths, T., Heberling, D., Hetzel, J., Hinder, F., Kacharava, A., Kamerdzhiev, V., Keshelashvili, I., Koop, I., Kulikov, A., Lehrach, A., Lenisa, P., Lomidze, N., Lorentz, B., Maanen, P., Macharashvili, G., Magiera, A., Mchedlishvili, D., Mey, S., Müller, F., Nass, A., Nikolaev, N. N., Pesce, A., Prasuhn, D., Rathmann, F., Rosenthal, M., Saleev, A., Schmidt, V., Semertzidis, Y., Shmakova, V., Silenko, A., Slim, J., Soltner, H., Stahl, A., Stassen, R., Stockhorst, H., Ströher, H., Tabidze, M., Tagliente, G., Talman, R., Engblom, P. Thörngren, Trinkel, F., Uzikov, Yu., Valdau, Yu., Valetov, E., Vassiliev, A., Weidemann, C., Wrońska, A., Wüstner, P., Zuprański, P., Żurek, M. |
| Source: |
Phys. Rev. Lett. 119, 014801 (2017) |
| Publication Year: |
2017 |
| Collection: |
Physics (Other) |
| Subject Terms: |
Physics - Accelerator Physics |
| More Details: |
This letter reports the successful use of feedback from a spin polarization measurement to the revolution frequency of a 0.97 GeV/$c$ bunched and polarized deuteron beam in the Cooler Synchrotron (COSY) storage ring in order to control both the precession rate ($\approx 121$ kHz) and the phase of the horizontal polarization component. Real time synchronization with a radio frequency (rf) solenoid made possible the rotation of the polarization out of the horizontal plane, yielding a demonstration of the feedback method to manipulate the polarization. In particular, the rotation rate shows a sinusoidal function of the horizontal polarization phase (relative to the rf solenoid), which was controlled to within a one standard deviation range of $\sigma = 0.21$ rad. The minimum possible adjustment was 3.7 mHz out of a revolution frequency of 753 kHz, which changes the precession rate by 26 mrad/s. Such a capability meets a requirement for the use of storage rings to look for an intrinsic electric dipole moment of charged particles. |
| Document Type: |
Working Paper |
| DOI: |
10.1103/PhysRevLett.119.014801 |
| Access URL: |
http://arxiv.org/abs/1703.07561 |
| Accession Number: |
edsarx.1703.07561 |
| Database: |
arXiv |
