Abstract
THE possibility of creating ordered ion beams in high-energy storage rings1,2 by means of electron and laser cooling has opened up a new era in accelerator physics. The enhanced luminosity and suppressed momentum spread in such systems create the highest possible phase-space density. The first experimental results were obtained by cooling 7Li+ beams to temperatures of a few kelvin or even to sub-kelvin temperatures3,4, and the ordered structures have been studied theoretically5–7 by methods of molecular dynamics. Predicted configurations for the lowest ion densities have been observed in low-energy quadrupole storage rings8 and linear traps9. Recently we showed that at slightly higher ion densities helical structures are obtained10. Here we present a series of new experimental results on ordered ion structures in a quadrupole storage ring. In order of increasing ion number, a linear chain of ions, a zig-zag structure, helical structures and finally multiple concentric shells could be observed. The experimental results agree with molecular dynamics calculations.
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References
Schiffer, J. P. & Kienle, P. Z. Phys. A321, 181 (1985).
Proc. Workshop on Crystalline Ion Beams (eds Hasse, R. W. Hofmann, I. & Liesen, D.) 2–63 (GSI, Darmstadt, 1989).
Schröder, S. et al. Phys. Rev. Lett. 64, 2901–2904 (1990).
Hangst, J. S. et al. Phys. Rev. Lett. 67, 1238–1241 (1991).
Rahman, A. & Schiffer, J. P. Phys. Rev. Lett. 57, 1133–1136 (1986).
Habs, D. in Lecture Notes in Physics 296: Frontiers of Particle Beams (Springer, New York, 1988).
Hasse, R. W. & Schiffer, J. P. Ann. Phys. 203, 419–448 (1990).
Walther, H. in Proc. Workshop on Light Induced Kinetic Effects on Atoms, Ions and Molecules (eds Moi, L., Gozzini, S., Gabbanini, C. Arimondo, E. & Strumia, F.) 261–276 (ETS Editrice, Pisa, 1991).
Raizen, M. G., Gilligan, J. M., Bergquist, J. C., Itano, W. M. & Wineland, D. J. J. mod. Opt. 39, 233–242 (1992).
Waki, I., Kassner, S., Birkl, G. & Walther, H. Phys. Rev. Lett. 68, 2007–2010 (1992).
Drees, J. & Paul, W. Z. Phys. 180, 340–361 (1964).
Church, D. A. J. appl. Phys. 40, 3127–3134 (1969).
Deutch, B. I. et al. Phys. Script. T22, 248–255 (1988).
Dehmelt, H. in Advances in Atomic and Molecular Physics Vol. 3. 53–72 (Academic, New York, 1967).
Totsuji, H. & Barrat, J.-L. Phys. Rev. Lett. 60, 2484–2487 (1988).
Diedrich, F., Peik, E., Chen, J. M., Quint, W. & Walther, H. Phys. Rev. Lett. 59, 2931–2934 (1987).
Blümel, R. et al. Nature 334, 309–313 (1988).
Wineland, D. J., Bergquist, J. C., Itano, W. M., Bollinger, J. J. & Manney, C. H. Phys. Rev. Lett. 59, 2935–2938 (1987).
Gilbert, S. L., Bollinger, J. J. & Wineland, D. J. Phys. Rev. Lett. 60, 2022–2025 (1988).
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Birkl, G., Kassner, S. & Walther, H. Multiple-shell structures of laser-cooled 24Mg+ ions in a quadrupole storage ring. Nature 357, 310–313 (1992). https://doi.org/10.1038/357310a0
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DOI: https://doi.org/10.1038/357310a0
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