Connection between zero chromaticity and long in-plane polarization lifetime in a magnetic storage ring

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Title
Connection between zero chromaticity and long in-plane polarization lifetime in a magnetic storage ring
Author(s)
Guidoboni, G; Stephenson, EJ; Wronska, A; Bagdasarian, Z; Bsaisou, J; Chekmenev, S; Ciullo, G; Dymov, S; Eversmann, D; M. Gaisser; Gebel, R; Hejny, V; Hempelmann, N; Hinder, F; Kacharava, A; Keshelashvili, I; Kulessa, P; Lenisa, P; Lehrach, A; Lorentz, B; Maanen, P; Maier, R; Mchedlishvili, D; Mey, S; Nass, A; Pesce, A; Orlov, Y; Pretz, J; Prasuhn, D; Rathmann, F; Rosenthal, M; Saleev, A; Yannis K. Semertzidis; Senichev, Y; Shmakova, V; Stockhorst, H; Stroher, H; Talman, R; Engblom, PT; Trinkel, F; Valdau, Y; Weidemann, C; Wustner, P; Zurek, M; Zyuzin, D
Publication Date
2018-02
Journal
Physical Review Accelerators and Beams, v.21, no.2, pp.024201 -
Publisher
AMER PHYSICAL SOC
Abstract
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 the lifetime of in-plane polarization (IPP) for a 0.97-GeV/c deuteron beam. The IPP magnitude was measured by continuously monitoring the down-up scattering asymmetry (sensitive to sideways polarization) in an in-beam, carbontarget polarimeter and unfolding the precession of the IPP due to the magnetic anomaly of the deuteron. The optimum operating conditions for a long IPP lifetime were made by scanning the field of the storage ring sextupole magnet families while observing the rate of IPP loss during storage of the beam. The beam was bunched and electron cooled. The IPP losses appear to arise from the change of the orbit circumference, and consequently the particle speed and spin tune, due to the transverse betatron oscillations of individual particles in the beam. The effects of these changes are canceled by an appropriate sextupole field setting. Published by the American Physical Society
URI
https://pr.ibs.re.kr/handle/8788114/4378
ISSN
2469-9888
Appears in Collections:
Center for Axion and Precision Physics Research(액시온 및 극한상호작용 연구단) > Journal Papers (저널논문)
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