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Positron Options for the Linac-Ring LHeC
Zimmermann F., Brüning O.S., Papaphilippou Y., Schulte D., Sievers P. et al
Dans Proceedings of IPAC2012 - International Particle Accelerator Conference - IPAC'12, New Orleans : États-Unis (2012) - http://hal.in2p3.fr/in2p3-00704868
Physique/Physique/Physique des accélérateurs
Positron Options for the Linac-Ring LHeC
F. Zimmermann1, O.S. Brüning1, Y. Papaphilippou1, D. Schulte1, P. Sievers1, H.-H. Braun, E.V. Bulyak, M. Klein, L. Rinolfi, A. Variola2, F. Zomer2, V. Yakimenko
1 :  CERN - European Organization for Nuclear Research
2 :  LAL - Laboratoire de l'Accélérateur Linéaire
CNRS : UMR8607 – IN2P3 – Université Paris XI - Paris Sud
Centre Scientifique d'Orsay B.P. 34 91898 ORSAY Cedex
Dept. Accelerateurs
The full physics program of a future Large Hadron electron Collider (LHeC) requires both pe+ and pe- collisions. For a pulsed 140-GeV or an ERL-based 60-GeV Linac-Ring LHeC this implies a challenging rate of, respectively, about 1.8 *10 15 or 4.4 *10 16 e+/s at the collision point, which is about 300 or 7000 times the past SLC rate. We consider providing this e+ rate through a combination of measures: (1) Reducing the required production rate from the e+ target through colliding e+ (and the LHC protons) several times before deceleration, by reusing the e+ over several acceleration/ deceleration cycles, and by cooling them, e.g., with a compact tri-ring scheme or a conventional damping ring in the SPS tunnel. (2) Using an advanced target, e.g., W-granules, rotating wheel, sliced-rod converter, or liquid metal jet, for converting gamma rays to e+. (3) Selecting the most powerful of several proposed gamma sources, namely Compton ERL, Compton storage ring, co- herent pair production in a strong laser, or high-field undulator radiation from the high-energy lepton beam. We describe the various concepts, present example parameters, estimate the electrical power required, and mention open questions.

Communications avec actes
Proceedings of IPAC2012
non spécifiée
Joint Accelerator Conferences Website

International Particle Accelerator Conference - IPAC'12
New Orleans

LAL/RT 12-13
ISBN 978-3-95450-115-1 - http://accelconf.web.cern.ch/AccelConf/IPAC2012/papers/weppr076.pdf
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weppr076.pdf(156.8 KB)