A   B   C   D   E   F   G   H   I   J   K   L   M   N   O   P   Q   R   S   T   U   V   W   X   Y   Z    

Bambade, P.

Paper Title Page
MOPLS060 Design of an Interaction Region with Head-on Collisions for the ILC 682
 
  • J. Payet, O. Napoly, C. Rippon, D. Uriot
    CEA, Gif-sur-Yvette
  • M. Alabau Pons, P. Bambade, J. Brossard, O. Dadoun, C. Rimbault
    LAL, Orsay
  • D.A.-K. Angal-Kalinin, F. Jackson
    CCLRC/DL/ASTeC, Daresbury, Warrington, Cheshire
  • R. Appleby
    UMAN, Manchester
  • L. Keller, Y. Nosochkov, A. Seryi
    SLAC, Menlo Park, California
 
  An interaction region with head-on collisions is considered an alternative to the baseline configuration of the International Linear Collider, including two interaction regions with finite crossing-angles (2 and 20 mrad). Although more challenging from the point of view of the beam extraction, the head-on scheme is favoured by the experiments because it allows a more convenient detector configuration, particularly in the forward region. The optics of the head-on extraction is revisited by separating the e+ and e- beams horizontally, first by electrostatic separators operated at their LEP nominal field and then using a defocusing quadrupole of the final focus beam line. In this way the septum magnet is protected from the beamstrahlung power. Newly optimized final focus and extraction optics are presented, including a first look at post-collision diagnostics. The influence of parasitic collisions is shown to lead to a region of stable collision parameters. Beam and beamstrahlung photon losses are calculated along the extraction elements. Issues concerning the design of the large bore superconducting final focus magnets, common to both incoming and outgoing beams, are considered.  
MOPLS061 Optimization of the e-e- Option for the ILC 685
 
  • M. Alabau Pons, M. Alabau Pons, A. Faus-Golfe
    IFIC, Valencia
  • R. Appleby
    UMAN, Manchester
  • P. Bambade, O. Dadoun
    LAL, Orsay
 
  The e-e- running mode is one of the interesting physics options for the International Linear Collider. The luminosity for e-e- collisions is reduced by mutual defocusing due to the strong electromagnetic fields that the bunches experience during collisions. The resulting beamstrahlung energy loss and beam-beam deflection angles as function of the vertical transverse offset are different compared to the e+e- collisions. In this paper, the dependence of these observables with the offset for different beam sizes has been analysed to optimize performances for the e-e- mode, taking into account the requirements of the beam-beam deflection based intra-train feedback system. A first study of the implications for the final focus and extraction line optics is also presented for the cases of the 2mrad and 20mrad ILC base line crossing angle geometries.  
MOPLS077 The 2mrad Crossing Angle Interaction Region and Extraction Line 730
 
  • R. Appleby
    UMAN, Manchester
  • D.A.-K. Angal-Kalinin
    CCLRC/DL/ASTeC, Daresbury, Warrington, Cheshire
  • P. Bambade, O. Dadoun
    LAL, Orsay
  • J. Carter
    Royal Holloway, University of London, Surrey
  • L. Keller, K. C. Moffeit, Y. Nosochkov, A. Seryi, C.M. Spencer
    SLAC, Menlo Park, California
  • O. Napoly
    CEA, Gif-sur-Yvette
  • B. Parker
    BNL, Upton, Long Island, New York
 
  A complete optics design for the 2mrad crossing angle interaction region and extraction line was presented at Snowmass 2005. Since this time, the design task force has been working on developing and improving the performance of the extraction line. The work has focused on optimising the final doublet parameters and on reducing the power losses resulting from the disrupted beam transport. In this paper, the most recent status of the 2mrad layout and the corresponding performance are presented.  
MOPLS078 Benchmarking of Tracking Codes (BDSIM/DIMAD) using the ILC Extraction Lines 733
 
  • R. Appleby
    UMAN, Manchester
  • P. Bambade, O. Dadoun
    LAL, Orsay
  • A. Ferrari
    UU/ISV, Uppsala
 
  The study of beam transport is of central importance to the design and performance assessment of modern particle accelerators. In this work, we benchmark two contemporary codes - DIMAD and BDSIM, the latter being a relatively new tracking code and built within the framework of GEANT4. We consider both the 20mrad and 2mrad extraction lines of the International Linear Collider and perform disrupted beam tracking studies of heavily disrupted post-collision electron beams. We find that the two codes in most cases give an equivalent description of the beam transport.