Laser-cooled continuous ion beams [electronic resource].

Published:: Argonne, Ill. : Argonne National Laboratory, 1995.
Oak Ridge, Tenn. : Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy.
Physical Description:: pages 69d.h : digital, PDF file
Additional Creators:: Argonne National Laboratory and United States. Department of Energy. Office of Scientific and Technical Information

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Summary:

A collaboration with a group in Arhus, Denmark, using their storage ring ASTRID, brought about better understanding of ion beams cooled to very low temperatures. The longitudinal Schottky fluctuation noise signals from a cooled beam were studied. The fluctuation signals are distorted by the effects of space charge as was observed in earlier measurements at other facilities. However, the signal also exhibits previously unobserved coherent components. The ions` velocity distribution, measured by a laser fluorescence technique suggests that the coherence is due to suppression of Landau damping. The observed behavior has important implications for the eventual attainment of a crystalline ion beam in a storage ring. A significant issue is the transverse temperature of the beam -- where no direct diagnostics are available and where molecular dynamics simulations raise interesting questions about equilibrium.

Report Numbers:

E 1.99:anl--95/14
anl--95/14

Subject(s):

Particle Accelerators

Other Subject(s):

Note:

Published through SciTech Connect.
08/01/1995.
"anl--95/14"
"DE96000985"
Nielsen, J.S.; Schiffer, J.P.; Hangst, J.S.

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