Session 8: Low and Intermediate Energy Accelerators and ... - CERN

which was injected at an energy of 400 MeV/u, was
cooled in about 6 s to a quality useful for precision
experiments.
Type of presentation requested: Poster
Classification: [A04] Low- and Intermediate-Energy
Circular Accelerators
12-739 - Measurement of Activation Induced by Ar
Beam in Copper Target
Alexander Fertman, Alexander Golubev, Mikhail
Prokuronov, Boris Sharkov (ITEP, Moscow), Georg
Fehrenbacher, Rainer Hasse, Ingo Hofmann, Edil
Mustafin, Dieter Schardt, Karin Weyrich (GSI,
Darmstadt)
Results of the measurement of activation induced by
Argon beam with energies of E=100,200,800 MeV/u in
the copper target are presented. The densities of
various radioactive isotopes are derived from the
measurements. Long-time prediction of radioactivity
and accumulated doses in the accelerator equipment is
calculated.
Type of presentation requested: Poster
Classification: [A04] Low- and Intermediate-Energy
Circular Accelerators
13-744 - Radiation Damage to the Elements of the
Nuclotron-type Dipole of SIS100
Nikolai Sobolevskiy, Ludmila Latysheva (RAS/INR,
Moscow), Hiroshi Iwase, Gebhard Moritz, Edil
Mustafin, Gertrud Walter (GSI, Darmstadt)
Radiation damage to various elements of the
Nuclotron-type dipole of SIS100 sensitive to
irradiation was calculated. Among the elements of
consideration were the superconducting cables,
insulating materials, ceramic insertions and highcurrent
by-pass diodes. The Monte-Carlo particle
transport code SHIELD was used to simulate
propagation of the lost ions and protons together with
the products of nuclear interactions in the material of
the elements. The results for the proton projectiles were
cross-checked using the particle transport code MARS,
and a good agreement between the codes were found. It
was found that the lifetime of the organic materials
under irradiation are much more restrictive limit for the
tolerable level of beam particle losses than the danger
of the quench events.
Type of presentation requested: Poster
Classification: [A04] Low- and Intermediate-Energy
Circular Accelerators
14-790 - High Intensity Uranium Operation in
SIS18
Peter J. Spiller (GSI, Darmstadt)
For the present experiment program and the planned
international accelerator facility at GSI, the space
charge limit of SIS18 for highly(4x1010) and
intermediate (2.7x1011) charged uranium ions shall be
reached within the next four years. Furthermore,
measures to increase the repetition- and ramp rate up to
4 Hz with 10 T/s have been progressed. The present state of
intensities per cycle and the limitations will be described. In
connection with the planned enhancement of heavy ion
intensities, protection, interlock and diagnostic systems,
especially for the injection- and extraction devices have
been prepared. Special attention is drawn on the insights
which were achieved with respect to the operation at
dynamic vacuum conditions. Results of R&D work with the
goal to increase the intensity threshold and to improve the
beam life time will be summarized. Furthermore, the
specific upgrade program and schedule for the SIS18
booster mode will be presented.
Type of presentation requested: Poster
Classification: [A04] Low- and Intermediate-Energy
Circular Accelerators
15-798 - The LHC Lead Ion Injector Chain
Karlheinz Schindl, Andre Beuret, Alfred Blas, Jan
Borburgh, Helmut Burkhardt, Christian Carli, Michel
Chanel, Tony Fowler, Marine Gourber-Pace, Steven
Hancock, Charles E. Hill, Michael Hourican, John Jowett,
Karsten Kahle, Detlef Kuchler, Alessandra Maria
Lombardi, Edgar Mahner, Django Manglunki, Michel
Martini, Stephan Maury, Flemming Pedersen, Uli Raich,
Carlo Rossi, Jean-Pierre Royer, Richard Scrivens, Luc
Sermeus, Elena Shaposhnikova, Gerard Tranquille,
Maurizio Vretenar, Thomas Zickler (CERN, Geneva)
A sizeable part of the LHC physics programme foresees
heavy ion (lead-lead) collisions with a design luminosity of
10^27 cm-2 s-1. This will be achieved after an upgrade of
the ion injector chain comprising Linac3, LEIR, PS and SPS
machines. Each LHC ring will be filled in ~10 minutes with
~600 bunches, each of 7 10^7 Pb ions. Central to the
scheme is the Low Energy Ion Ring (LEIR), which
transforms long pulses from Linac3 to high-brilliance
bunches by means of 6D multi-turn injection and
accumulation via electron cooling. Major limitations along
the chain, including space charge, intra-beam scattering,
vacuum issues, and emittance preservation are highlighted.
The conversion from LEAR (Low Energy Antiproton Ring)
to LEIR includes new magnets and power converters, highcurrent
electron cooling, broad-band RF cavities, upgraded
beam diagnostics, and UHV vacuum equipment relying on
beam scrubbing to achieve a few 10^-12 mbar. Major
hardware changes in Linac3 (Electron Cyclotron Resonance
source, repetition rate, energy ramping cavity), PS (new
injection hardware, elaborate RF gymnastics, stripping
insertion), and SPS (100 MHz system) are described. An
early beam scenario, using fewer bunches but the same
bunch intensity to deliver a lower luminosity, reduces the
work required for LHC ion operation in spring 2008.
CERN, Geneva, Switzerland
Type of presentation requested: Poster
Classification: [A04] Low- and Intermediate-Energy
Circular Accelerators