Maintaining a resonance condition of an rf spin rotator through a feedback loop in a storage ring
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 filter) with respect to a 120 kHz spin precession in the Cooler Synchrotron (COSY) storage ring. Real-time monitoring of...
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| Format: | Article |
| Language: | English |
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American Physical Society
2025-06-01
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| Series: | Physical Review Accelerators and Beams |
| Online Access: | http://doi.org/10.1103/PhysRevAccelBeams.28.062801 |
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| author | V. Hejny A. Andres J. Pretz F. Abusaif A. Aggarwal A. Aksentev B. Alberdi L. Barion I. Bekman M. Beyß C. Böhme B. Breitkreutz N. Canale G. Ciullo S. Dymov N.-O. Fröhlich R. Gebel M. Gaisser K. Grigoryev D. Grzonka J. Hetzel O. Javakhishvili A. Kacharava V. Kamerdzhiev S. Karanth I. Keshelashvili A. Kononov K. Laihem A. Lehrach P. Lenisa N. Lomidze B. Lorentz G. Macharashvili A. Magiera D. Mchedlishvili A. Melnikov F. Müller A. Nass N. N. Nikolaev D. Okropiridze A. Pesce A. Piccoli V. Poncza D. Prasuhn F. Rathmann A. Saleev D. Shergelashvili V. Shmakova R. Shankar N. Shurkhno S. Siddique A. Silenko J. Slim H. Soltner R. Stassen E. J. Stephenson H. Ströher M. Tabidze G. Tagliente Y. Valdau M. Vitz T. Wagner A. Wirzba A. Wrońska P. Wüstner M. Żurek |
| author_facet | V. Hejny A. Andres J. Pretz F. Abusaif A. Aggarwal A. Aksentev B. Alberdi L. Barion I. Bekman M. Beyß C. Böhme B. Breitkreutz N. Canale G. Ciullo S. Dymov N.-O. Fröhlich R. Gebel M. Gaisser K. Grigoryev D. Grzonka J. Hetzel O. Javakhishvili A. Kacharava V. Kamerdzhiev S. Karanth I. Keshelashvili A. Kononov K. Laihem A. Lehrach P. Lenisa N. Lomidze B. Lorentz G. Macharashvili A. Magiera D. Mchedlishvili A. Melnikov F. Müller A. Nass N. N. Nikolaev D. Okropiridze A. Pesce A. Piccoli V. Poncza D. Prasuhn F. Rathmann A. Saleev D. Shergelashvili V. Shmakova R. Shankar N. Shurkhno S. Siddique A. Silenko J. Slim H. Soltner R. Stassen E. J. Stephenson H. Ströher M. Tabidze G. Tagliente Y. Valdau M. Vitz T. Wagner A. Wirzba A. Wrońska P. Wüstner M. Żurek |
| author_sort | V. Hejny |
| collection | DOAJ |
| description | 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 filter) with respect to a 120 kHz spin precession in the Cooler Synchrotron (COSY) storage ring. Real-time monitoring of the spin precession and the rf Wien filter signal allows the relative phase between the two to be stabilized at an arbitrary setpoint. The feedback system compensates for deviations in the relative phase by adjusting the frequency and/or phase of the rf device as needed. With this method, a variation in the phase relative to the demanded value with a standard deviation of σ_{Δφ}≈0.2 rad could be achieved. The system was implemented in two runs aiming at a first direct measurement of the deuteron electric dipole moment in 2018 and 2021. In addition, the difference between a single-bunch beam affected by the spin rotator and a two-bunch system in which only one bunch is exposed to the spin rotator fields is discussed. Both methods have been used during these beam times. The ability to keep the spin precession and the rf fields synchronized is crucial for future investigations of electric dipole moments of charged particles using storage rings. |
| format | Article |
| id | doaj-art-ae47e389a9424863bf98192b5e598c97 |
| institution | DOAJ |
| issn | 2469-9888 |
| language | English |
| publishDate | 2025-06-01 |
| publisher | American Physical Society |
| record_format | Article |
| series | Physical Review Accelerators and Beams |
| spelling | doaj-art-ae47e389a9424863bf98192b5e598c972025-08-20T03:07:35ZengAmerican Physical SocietyPhysical Review Accelerators and Beams2469-98882025-06-0128606280110.1103/PhysRevAccelBeams.28.062801Maintaining a resonance condition of an rf spin rotator through a feedback loop in a storage ringV. HejnyA. AndresJ. PretzF. AbusaifA. AggarwalA. AksentevB. AlberdiL. BarionI. BekmanM. BeyßC. BöhmeB. BreitkreutzN. CanaleG. CiulloS. DymovN.-O. FröhlichR. GebelM. GaisserK. GrigoryevD. GrzonkaJ. HetzelO. JavakhishviliA. KacharavaV. KamerdzhievS. KaranthI. KeshelashviliA. KononovK. LaihemA. LehrachP. LenisaN. LomidzeB. LorentzG. MacharashviliA. MagieraD. MchedlishviliA. MelnikovF. MüllerA. NassN. N. NikolaevD. OkropiridzeA. PesceA. PiccoliV. PonczaD. PrasuhnF. RathmannA. SaleevD. ShergelashviliV. ShmakovaR. ShankarN. ShurkhnoS. SiddiqueA. SilenkoJ. SlimH. SoltnerR. StassenE. J. StephensonH. StröherM. TabidzeG. TaglienteY. ValdauM. VitzT. WagnerA. WirzbaA. WrońskaP. WüstnerM. ŻurekThis 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 filter) with respect to a 120 kHz spin precession in the Cooler Synchrotron (COSY) storage ring. Real-time monitoring of the spin precession and the rf Wien filter signal allows the relative phase between the two to be stabilized at an arbitrary setpoint. The feedback system compensates for deviations in the relative phase by adjusting the frequency and/or phase of the rf device as needed. With this method, a variation in the phase relative to the demanded value with a standard deviation of σ_{Δφ}≈0.2 rad could be achieved. The system was implemented in two runs aiming at a first direct measurement of the deuteron electric dipole moment in 2018 and 2021. In addition, the difference between a single-bunch beam affected by the spin rotator and a two-bunch system in which only one bunch is exposed to the spin rotator fields is discussed. Both methods have been used during these beam times. The ability to keep the spin precession and the rf fields synchronized is crucial for future investigations of electric dipole moments of charged particles using storage rings.http://doi.org/10.1103/PhysRevAccelBeams.28.062801 |
| spellingShingle | V. Hejny A. Andres J. Pretz F. Abusaif A. Aggarwal A. Aksentev B. Alberdi L. Barion I. Bekman M. Beyß C. Böhme B. Breitkreutz N. Canale G. Ciullo S. Dymov N.-O. Fröhlich R. Gebel M. Gaisser K. Grigoryev D. Grzonka J. Hetzel O. Javakhishvili A. Kacharava V. Kamerdzhiev S. Karanth I. Keshelashvili A. Kononov K. Laihem A. Lehrach P. Lenisa N. Lomidze B. Lorentz G. Macharashvili A. Magiera D. Mchedlishvili A. Melnikov F. Müller A. Nass N. N. Nikolaev D. Okropiridze A. Pesce A. Piccoli V. Poncza D. Prasuhn F. Rathmann A. Saleev D. Shergelashvili V. Shmakova R. Shankar N. Shurkhno S. Siddique A. Silenko J. Slim H. Soltner R. Stassen E. J. Stephenson H. Ströher M. Tabidze G. Tagliente Y. Valdau M. Vitz T. Wagner A. Wirzba A. Wrońska P. Wüstner M. Żurek Maintaining a resonance condition of an rf spin rotator through a feedback loop in a storage ring Physical Review Accelerators and Beams |
| title | Maintaining a resonance condition of an rf spin rotator through a feedback loop in a storage ring |
| title_full | Maintaining a resonance condition of an rf spin rotator through a feedback loop in a storage ring |
| title_fullStr | Maintaining a resonance condition of an rf spin rotator through a feedback loop in a storage ring |
| title_full_unstemmed | Maintaining a resonance condition of an rf spin rotator through a feedback loop in a storage ring |
| title_short | Maintaining a resonance condition of an rf spin rotator through a feedback loop in a storage ring |
| title_sort | maintaining a resonance condition of an rf spin rotator through a feedback loop in a storage ring |
| url | http://doi.org/10.1103/PhysRevAccelBeams.28.062801 |
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