Title: 	 Crystal Collimation Studies at the Tevatron (T-980)

Presenter:  V. Previtali (TBC)

Authors:  G.E. Annala, A. Apyan, R.W. Assmann, R.A. Carrigan, Y.A. Chesnokov,
          A.I. Drozhdin, V. Guidi, Y.M. Ivanov, T.R. Johnson, A. Legan,
          N.V. Mokhov, S. Peggs, V. Previtali, M. Prest, S. Redaelli, R.E. Reilly,
          W. Scandale, V. Shiltsev, S. Shiraishi, D.A. Still, R. Tesarek,
          I.A. Yazynin, J. Zagel

  Abstract

Bent-crystal channeling is a technique with a potential to increase
the beam-halo collimation efficiency at high-energy colliders. First
measurements at the Tevatron in 2005 have shown that using a 5-mm
silicon crystal to deflect the proton beam halo onto a secondary
collimator improves the system performance by reducing the machine
impedance, beam losses in the collider detectors and irradiation of
the superconducting magnets, all in agreement with simulations.
Recent results, obtained with substantially improved goniometer and
enhanced beam diagnostics, are reported showing channeling collimation
of the ~1-TeV circulating proton beam halo at the Tevatron collider.
Comprehensive results of computer modeling are presented which allow
further developments of the T-980 experiment towards a robust system
compatible with requirements to high-efficient collimation at the
Tevatron and LHC hadron colliders.

ID: 2878

"Gerald E. Annala" <annala@fnal.gov>,  aapyan@fnal.gov,
Ralph Wolfgang Assmann <Ralph.Assmann@cern.ch>, "Richard A. CarriganJr." <carrigan@fnal.gov>,
Yury Chesnokov <Yury.Chesnokov@ihep.ru>, Alexandr Drozhdin <drozhdin@fnal.gov>,
Vincenzo Guidi <guidi@fe.infn.it>, "Yuri M.Ivanov" <yumi@pnpi.spb.ru>,
Todd Johnson <tjohnson@fnal.gov>,"Al Legan Jr." <legan@fnal.gov>,
Nikolai Mokhov <mokhov@fnal.gov>,Steve Peggs <peggs@bnl.gov>,
Valentina PREVITALI <valentina.previtali@cern.ch>, michela prest <michela.prest@uninsubria.it>,
Stefano Redaelli <Stefano.Redaelli@cern.ch>, "Robert E. Reilly" <reilly@fnal.gov>,
Walter.Scandale@cern.ch, Vladimir Shiltsev <shiltsev@fnal.gov>,
Satomi Shiraishi <satomis@hep.uchicago.edu>, Rick Tesarek <tesarek@fnal.gov>,
Igor Yazynin <Igor.Yazynin@ihep.ru>, Jim Zagel <zagel@fnal.gov>