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Phys. Rev. Lett. 72, 1479–1481 (1994)

Adiabatic partial Siberian snake turn-on with no beam depolarization

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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. S. Nurushev, D. B. Raczkowksi, S. E. Sund, and V. K. Wong
Randall Laboratory of Physics, University of Michigan, Ann Arbor, Michigan 48109-1120

D. D. Caussyn, T. J. P. Ellison, S. Y. Lee, F. Sperisen, E. J. Stephenson, and B. von Przewoski
Indiana University Cyclotron Facility, Bloomington, Indiana 47408-0768

R. Baiod, F. Z. Khiari, L. G. Ratner, and H. Sato
Fermilab, Batavia, Illinois 60510
Energy Research Laboratory, King Fahd University, Dhahran 31261, Saudi Arabia
Alternating Gradient Synchrotron Department, Brookhaven National Laboratory, Upton, New York, 11973
KEK, National Laboratory for High Energy Physics, 1-1 Oho, Tsukuba-shi, Ibaraki-ken 305, Japan

Received 17 December 1993; published in the issue dated 7 March 1994

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, νs 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.

© 1994 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevLett.72.1479
DOI:
10.1103/PhysRevLett.72.1479
PACS:
41.75.Ak, 07.77.+p, 29.27.Bd, 29.27.Hj
 
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