The SPS as lead-ion accelerator

In 1995 the CERN SPS was used during two months to accelerate fully stripped ions of the Pb208 isotope from the equivalent proton momentum of 13 GeV/c to 400 GeV/c. The radio frequency swing which is needed in order to keep the synchronism during acceleration is too big to have the SPS cavities deli...

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Autores principales: Altuna, X, Arduini, Gianluigi, Arimatea, C, Bailey, R, Blanchard, R R, Bohl, T, Brouzet, E, Burkhardt, H, Collier, Paul, Cornelis, Karel, de Rijk, G, Faugier, A, Ferioli, F, Hilaire, A, Jonker, M, Lamont, M, Linnecar, Trevor Paul R, Normann, L, Niquille, C, Roy, G, Wenninger, J
Lenguaje:eng
Publicado: 1996
Materias:
Accelerators and Storage Rings
Acceso en línea:http://cds.cern.ch/record/306911
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author Altuna, X
Arduini, Gianluigi
Arimatea, C
Bailey, R
Blanchard, R R
Bohl, T
Brouzet, E
Burkhardt, H
Collier, Paul
Cornelis, Karel
de Rijk, G
Faugier, A
Ferioli, F
Hilaire, A
Jonker, M
Lamont, M
Linnecar, Trevor Paul R
Normann, L
Niquille, C
Roy, G
Wenninger, J
author_facet Altuna, X
Arduini, Gianluigi
Arimatea, C
Bailey, R
Blanchard, R R
Bohl, T
Brouzet, E
Burkhardt, H
Collier, Paul
Cornelis, Karel
de Rijk, G
Faugier, A
Ferioli, F
Hilaire, A
Jonker, M
Lamont, M
Linnecar, Trevor Paul R
Normann, L
Niquille, C
Roy, G
Wenninger, J
author_sort Altuna, X
collection CERN
description In 1995 the CERN SPS was used during two months to accelerate fully stripped ions of the Pb208 isotope from the equivalent proton momentum of 13 GeV/c to 400 GeV/c. The radio frequency swing which is needed in order to keep the synchronism during acceleration is too big to have the SPS cavities deliver enough voltage for all frequencies. In a first stage, the beam is accelerated from 13 GeV/c to 26 GeV/c using the fixed frequency mode. During this stage the beam is grouped in four 2msec batches, separated by 3msec holes during which the frequency is changed in order to keep synchronism. At 26 GeV the beams are de-bunched and recaptured in order to fill the 3msec holes. From there on the lead ions are then accelerated up to 400 GeV/c with the normal frequency program. The de-bunching and recapture at 26 GeV improved the effective spill at extraction by a factor of three. Intensities up to 3.9 1010 charges could be obtained at 400 GeV/c. The total efficiency of the two RF captures was 64%.
id cern-306911
institution Organización Europea para la Investigación Nuclear
language eng
publishDate 1996
record_format invenio
spelling cern-3069112023-05-05T12:57:25Zhttp://cds.cern.ch/record/306911engAltuna, XArduini, GianluigiArimatea, CBailey, RBlanchard, R RBohl, TBrouzet, EBurkhardt, HCollier, PaulCornelis, Karelde Rijk, GFaugier, AFerioli, FHilaire, AJonker, MLamont, MLinnecar, Trevor Paul RNormann, LNiquille, CRoy, GWenninger, JThe SPS as lead-ion acceleratorAccelerators and Storage RingsIn 1995 the CERN SPS was used during two months to accelerate fully stripped ions of the Pb208 isotope from the equivalent proton momentum of 13 GeV/c to 400 GeV/c. The radio frequency swing which is needed in order to keep the synchronism during acceleration is too big to have the SPS cavities deliver enough voltage for all frequencies. In a first stage, the beam is accelerated from 13 GeV/c to 26 GeV/c using the fixed frequency mode. During this stage the beam is grouped in four 2msec batches, separated by 3msec holes during which the frequency is changed in order to keep synchronism. At 26 GeV the beams are de-bunched and recaptured in order to fill the 3msec holes. From there on the lead ions are then accelerated up to 400 GeV/c with the normal frequency program. The de-bunching and recapture at 26 GeV improved the effective spill at extraction by a factor of three. Intensities up to 3.9 1010 charges could be obtained at 400 GeV/c. The total efficiency of the two RF captures was 64%.CERN-SL-96-023-OPoai:cds.cern.ch:3069111996-06-26
spellingShingle Accelerators and Storage Rings
Altuna, X
Arduini, Gianluigi
Arimatea, C
Bailey, R
Blanchard, R R
Bohl, T
Brouzet, E
Burkhardt, H
Collier, Paul
Cornelis, Karel
de Rijk, G
Faugier, A
Ferioli, F
Hilaire, A
Jonker, M
Lamont, M
Linnecar, Trevor Paul R
Normann, L
Niquille, C
Roy, G
Wenninger, J
The SPS as lead-ion accelerator
title The SPS as lead-ion accelerator
title_full The SPS as lead-ion accelerator
title_fullStr The SPS as lead-ion accelerator
title_full_unstemmed The SPS as lead-ion accelerator
title_short The SPS as lead-ion accelerator
title_sort sps as lead-ion accelerator
topic Accelerators and Storage Rings
url http://cds.cern.ch/record/306911
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