Abstract
In the framework of antiproton physics at CERN, a new Low Energy Antiproton Ring (LEAR) is being designed. In the basic mode, it will serve as a beam stretcher giving spill times in the region of an hour. The spill φ(t) must, of course, have a good duty factor <φ>2/<φ>2. A method employing “stochastic extraction” has been studied theoretically and tried out at the CERN PS (∿ 9 s flat top) where an extremely good duty factor has been achieved, showing that much longer spill times will be practicable. The pulse length can be varied within wide limits given by the ripple, the momentum acceptance and the intermodulation distortion of the amplifier chain for the noise power. In addition, another method has been found effective which uses empty buckets. These methods need no servo system and both can easily be applied to other synchrotrons.
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References
P. Lefevre, D. Möhl, G. Plass, the CERN Low Energy Antiproton Ring (LEAR) project, This conference.
S. van der Meer, Stochastic Extraction-A low ripple version of resonant extraction CERN/PS/AA 78-6, 1.3.1978.
W. Hardt, Remarks on Stochastic Extraction, (CERN) PS/DL/Note 78-5, 2.10.1978.
R. Cappi and W. Hardt, Stochastic Extraction at 10 GeV/c, Machine Development Reports: (31 May 1979), PS/OP/MD 79-5, 14.06.1979; (29–30 August and 12–13 September 1979), PS/OP/MD 79-7, 08.10.1979; (10–11 January 1980), PS/OP/MD 80-1, 17.01.1980; (18 March 1980), PS/OP/MD 80-5, 27.03.1980.
N. Blazianu, R. Cappi, Ch. Steinbach, Stochastic extraction applied on conventional 24 GeV/c extraction, PS/OP/MD 80-6, 29.4.1980.
R. Cappi and Ch. Steinbach, Improvement of the low frequency duty factor of slow extraction by RF phase displacement, CERN/PS/OP 80-10, 20.5.1980.
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© 1980 Springer Basel AG
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Cappi, R., Hardt, W.E.K., Steinbach, C.P. (1980). Ultraslow Extraction with Good Duty Factor. In: Newman, W.S. (eds) 11th International Conference on High-Energy Accelerators. Experientia Supplementum, vol 40. Birkhäuser, Basel. https://doi.org/10.1007/978-3-0348-5540-2_41
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DOI: https://doi.org/10.1007/978-3-0348-5540-2_41
Publisher Name: Birkhäuser, Basel
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