• M. Gyr, W. Bartmann, M. Benedikt, B. Goddard, M. Meddahi
  CERN, Geneva
• A. Koschik
  ETH, Zürich
• D. Mayani Parás
  UNAM, México, D.F.

For the proposed PS2 accelerator several extraction systems are needed, including a slow third-integer resonant extraction. The requirements are presented together with the conceptual considerations for the sextupole locations and strengths, the separatrices at the extraction elements and the aperture implications for the overall machine. Calculations of the phase space separatrices have been computed with a new code for the physics of slow resonant extraction, which is briefly reviewed. Implications for the extraction equipment design and for the injection-extraction straight section optics are discussed.

• E. Gianfelice-Wendt
  Fermilab, Batavia
• B. Goddard, W. Höfle, V. Kain, M. Meddahi, E.N. Shaposhnikova
  CERN, Geneva
• A. Koschik
  ETH, Zurich

Funding: Work partly supported by Fermilab, operated by Fermi Research Alliance, LLC under Contract No. DE-AC02-07CH11359 with the United States Department of Energy

In the Large Hadron Collider –LHC, particles not captured by the RF system at injection or leaking out of the RF bucket may quench the superconducting magnets during beam abort. The problem, common to other superconducting machines, is particularly serious for the LHC due to the very large stored energy in the beam. For the LHC a way of removing the unbunched beam has been studied and it uses the existing damper kickers to excite resonantly the particles travelling along the abort gap. In this paper we describe the results of simulations performed with MAD-X for various LHC optics configurations, including the estimated multipolar errors.