Journal Article

FZJ-2017-07903

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Non-exponential decoherence of radio-frequency resonance rotation of spin in storage rings

Saleev, A. (Corresponding author)FZJ* ; Nikolaev, N. N. (Corresponding author) ; Rathmann, F.FZJ* ; Hinder, F.FZJ* ; Pretz, J.FZJ* ; Rosenthal, M.

2017
Springer Heidelberg [u.a.]

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Please use a persistent id in citations: doi:10.1134/S0021364017160044

Abstract: Precision experiments, such as the search for electric dipole moments of charged particles using radio-frequency spin rotators in storage rings, demand for maintaining the exact spin resonance condition for several thousand seconds. Synchrotron oscillations in the stored beam modulate the spin tune of off-central particles, moving it off the perfect resonance condition set for central particles on the reference orbit. Here, we report an analytic description of how synchrotron oscillations lead to non-exponential decoherence of the radio-frequency resonance driven up–down spin rotations. This non-exponential decoherence is shown to be accompanied by a nontrivial walk of the spin phase. We also comment on sensitivity of the decoherence rate to the harmonics of the radio-frequency spin rotator and a possibility to check predictions of decoherence-free magic energies.

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Contributing Institute(s):

1. Experimentelle Hadrondynamik (IKP-2)
2. Kernphysikalische Großgeräte (IKP-4)

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)

Appears in the scientific report 2017

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Database coverage:
; Current Contents - Physical, Chemical and Earth Sciences ; Ebsco Academic Search ; IF < 5 ; JCR ; SCOPUS ; Science Citation Index ; Science Citation Index Expanded ; Thomson Reuters Master Journal List ; Web of Science Core Collection

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