| Paper |
Title |
Page |
| MOPC009 |
Experiments on LHC Long-Range Beam-Beam Compensation and Crossing Schemes at the CERN SPS in 2004
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686 |
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- F. Zimmermann, J.-P. Koutchouk, F. Roncarolo, J. Wenninger
CERN, Geneva
- Y. Papaphilippou
ESRF, Grenoble
- T. Sen, V.D. Shiltsev
Fermilab, Batavia, Illinois
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Experiments with two prototype long-range beam-beam compensators (current-carrying wires) during the 2004 CERN SPS run explored the efficiency of a proposed long-range beam-beam compensation for the LHC. In addition, the SPS compensators were also used to 'simulate' the effect of different planes of crossing at two LHC interaction points. We present the experimental results and compare them with computer simulations.
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| TPAP046 |
Towards an Optimization of the LHC Intersection Region using New Magnet Technology
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2920 |
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- P.M. McIntyre, A. Sattarov
Texas A&M University, College Station, Texas
- J.-P. Koutchouk
CERN, Geneva
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An optimized design of the intersection region of LHC is presented. The starting point of the design is to move the quadrupole triplet to a minimum distance from the intersect – 12 m. The innermost quadrupole must accommodate substantial heat load from particles, and is designed using a structured cable that incorporates internal refrigeration with supercritical helium. Using the reduced aperture required by this closer spacing, Nb3Sn quadrupoles have been designed with gradients of 350-400 T/m for the triplet. The separation dipole utilizes a levitated-pole design that mitigates the extreme heat and radiation challenges for that application. The above technical elements have been incorporated into an optimized insertion design that minimizes ?* while significantly reducing sensitivities to errors in multipoles and alignment. The additional space that is opened in the lattice can be used to fully localize the optical design of the insertion so that it does not require corrections through the neighboring arcs.
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