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Tenth European Particle Accelerator Conference "EPAC'06", Edinburgh : Royaume-Uni (2006)
Design of an Interaction Region with Head-On Collisions for the ILC
R. Appleby, D. Angal-Kalinin, F. Jackson, M. Alabau Pons1, P. Bambade1, J. Brossard1, O. Dadoun1, Cécile Rimbault1, L. Keller, Y. Nosochkov, A. Seryi, J. Payet2, O. Napoly2, C. Rippon2, D. Uriot2
(2006)

An interaction region (IR) with head-on collisions is considered as an alternative to the baseline configuration of the International Linear Collider (ILC) which includes two IRs with finite crossing-angles (2 and 20 mrad). Although more challenging for 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. Disrupted beam and beamstrahlung photon losses are calculated along the extraction elements.
1 :  LAL - Laboratoire de l'Accélérateur Linéaire
2 :  DAPNIA - Département d'Astrophysique, de physique des Particules, de physique Nucléaire et de l'Instrumentation Associée
Physique/Physique/Physique des accélérateurs
Lien vers le texte intégral : 
http://fr.arXiv.org/abs/physics/0609248