E
E. Steffens
Researcher at Max Planck Society
Publications - 45
Citations - 1105
E. Steffens is an academic researcher from Max Planck Society. The author has contributed to research in topics: Polarization (waves) & Ion. The author has an hindex of 19, co-authored 45 publications receiving 1085 citations.
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Journal ArticleDOI
The HERA polarimeter and the first observation of electron spin polarization at HERA
D. P. Barber,H.-D. Bremer,M. Böge,R. Brinkmann,W. Brückner,Ch. Büscher,M.S. Chapman,K. J. Coulter,P.P.J. Delheij,M. Düren,E. Gianfelice-Wendt,P.W. Green,H.G. Gaul,H. Gressmann,O. Hausser,O. Hausser,R. Henderson,T. Janke,H. Kaiser,Ralf Kaiser,P. Kitching,Robert Klanner,P. Levy,H.-Ch. Lewin,M. Lomperski,Wolfgang Lorenzon,L. Losev,R. D. McKeown,N. Meyners,B. Micheel,Ross Milner,A. Mücklich,F. Neunreither,W.-D. Nowak,P. M. Patel,K. Rith,Ch. Scholz,E. Steffens,M. Veltri,M. Vetterli,M. Vetterli,W. Vogel,W. Wander,D. Westphal,K. Zapfe,F. Zetsche +45 more
TL;DR: In this paper, the polarimeter, the machine conditions, the data analysis, the first results and plans for future measurements are described, as well as the polarization values close to 60% have been achieved.
Journal ArticleDOI
First experiments with the heidelberg test storage ring TSR
Dietrich Habs,W. Baumann,J. Berger,P. Blatt,A. Faulstich,P. Krause,G. Kilgus,R. Neumann,W. Petrich,R. Stokstad,D. Schwalm,E. Szmola,K. Welti,Andreas Wolf,S. Zwickler,E. Jaeschke,D. Krämer,G. Bisoffi,M. Blum,A. Friedrich,C. Geyer,Manfred Grieser,H.W. Heyng,B. Holzer,R. Ihde,M. Jung,K. Matl,W. Ott,Bogdan Povh,Roland Repnow,M. Steck,E. Steffens,D. Dutta,T. Kühl,D. Marx,S. Schröder,M. Gerhard,R. Grieser,G. Huber,R. Klein,M. Krieg,N. Schmidt,R. Schuch,James Babb,Larry Spruch,W. Arnold,A. Noda +46 more
TL;DR: The Heidelberg heavy ion test storage ring TSR started operation in May 1988 and the first experiments were performed in 1989 as mentioned in this paper, where the lifetime of the ion beams observed in the first experiment can be explained by interactions with the residual gas.
Journal ArticleDOI
New method to polarize protons in a storage ring and implications to polarize antiprotons
Frank Rathmann,C. Montag,D. Fick,J. Tonhäuser,W. Brückner,H.G. Gaul,Manfred Grieser,Bogdan Povh,M. Rall,E. Steffens,F. Stock,K. Zapfe,B. Braun,G. Graw,W. Haeberli +14 more
TL;DR: A feasibility test of a new method to polarize beams of strongly interacting charged particles circulating in a storage ring is described, and the polarization buildup is clearly demonstrated.
Journal ArticleDOI
The first achievement of longitudinal spin polarization in a high energy electron storage ring
D. P. Barber,M. Böge,H.-D. Bremer,R. Brinkmann,W. Brückner,M. Düren,E. Gianfelice-Wendt,C. Großhauser,H. Kaiser,Robert Klanner,M. Lomperski,G. Meyer,N. Meyners,P. Oelwein,G. Ripken,Klaus Rith,G. Schmidt,E. Steffens,W. Wander,W. Wümpelmann,K. Zapfe,F. Zetsche +21 more
TL;DR: A pair of spin rotators has been installed in the electron ring of HERA and up to 65% of the spin polarizations have been reached reproducibly during dedicated measurement time.
Journal ArticleDOI
Elastic scattering of vector polarized 6Li
Werner Weiss,P. Egelhof,K.D. Hildenbrand,D. Kassen,M. Makowska-Rzeszutko,D. Fick,H. Ebinghaus,E. Steffens,A. Amakawa,K.I. Kubo +9 more
TL;DR: In this paper, the elastic scattering of 6Li on 12C, 16O, 28Si and 58Ni has been investigated at a bombarding energy of ELi = 228 MeV and the analysis power had been obtained by measuring successively with a polarized and unpolarized beam (high frequency transition of the source1) on and off respectively.