Open AccessAdiabatic partial Siberian snake turn-on with no beam depolarization
Author(s) -
R. A. Phelps,
V. A. Anferov,
C. M. Chu,
E. D. Courant,
D. A. Crandell,
Ya. S. Derbenev,
W. A. Kaufman,
A. V. Koulsha,
A. D. Krisch,
T Nurushev,
D. B. Raczkowksi,
Susan E. Sund,
V. K. Wong,
D. D. Caussyn,
T. Ellison,
S. Y. Lee,
F. Sperisen,
E.J. Stephenson,
B. von Przewoski,
R. Baiod,
F. Z. Khiari,
L. G. Ratner,
Hiroki Sato
Publication year - 1994
Publication title -
physical review letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 3.688
H-Index - 673
eISSN - 1079-7114
pISSN - 0031-9007
DOI - 10.1103/physrevlett.72.1479
Subject(s) - adiabatic process , physics , beam (structure) , magnet , solenoid , polarization (electrochemistry) , atomic physics , nuclear physics , optics , quantum mechanics , chemistry
A recent experiment in the IUCF cooler ring studied the adiabatic turn-on of a partial Siberian snake at 370 MeV, where the spin tune, [nu][sub [ital s]] is 21/2 for all snake strengths. The snake consisted of two rampable warm solenoid magnets in series with a superconducting solenoid; this combination allowed varying the snake strength between about 0 and 25% at 370 MeV. We measured the beam polaraization after varying the snake either 1, 2, or 10 times; we found with good precision that no polarization was lost. This supports the conjecture that a Siberian snake can be ramped adiabatically at an energy where the spin tune is a half integer.
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