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P.69. V.N.Volkov, Ya.G.Kruichkov, V.M.Petrov, A.G.Tribendis (Budker Institute of Nuclear Physics, Novosibirsk, Russia), D.Janssen (FZ Rossendorf, Dresden, Germany)

Cathode assembly of superconducting photocathode RF gun

Photocathode radio-frequency (RF) guns of electron beams on the basis of superconduct- ing cavities call major interest in the world. In many laboratories the drafts of making of such RF guns are considered. In BINP in cooperation with FZ Rossendorf (Germany) the prototype of such RF gun was developed, made and successfully tested. On the basis of these engineerings in FZ Rossendorf (for the accelerator ELBE) the creating of full scale RF gun with 3.5 cell superconducting cavity is in progress now. The cathode assembly allows to integrate normal conducting cathode into the superconducting cavity. In the pa- per the perfected construction of a cathode assembly tested in the prototype of a super- conducting RF gun is considered.

Dr. Vladimir Volkov: v.n.volkov@inp.nsk.su

Poster session: Magnetic systems, power supply and vacuum sys- tems for accelerators

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    70. D.Gurov, O.Kiselev, I.Morozov, A.Ogurtsov, V.Petrov, E.Ruvinsky, A.Sukhanov

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      Zhilayev (Budker Institute of Nuclear Physics, Novosibirsk, Russia); D.Cornuet,

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      Gérard, W.Kalbreier, S.Ramberger, G. de Rijk (CERN, Switzerland) Normal-Conducting Separation and Compensation Dipoles for the LHC Experimental Insertions

The experimental insertions of the LHC employ normal-conducting magnets to provide for part of the beam separation and to compensate the effect of two large spectrometer di- poles. In the interaction regions IR1 for the ATLAS experiment and IR5 for the CMS ex- periment, each of the optical elements D1 for beam separation on either side of the ex- periment consist of 6 MBXW dipoles. Each magnet has a core length of 3.4 m, a large single aperture with a gap height of 63 mm and will operate in the field range up to 1.5 T. The MBXWT and MBXWS magnets are shorter versions of the MBXW magnet and will be used as vertical and horizontal compensation dipoles for the spectrometer dipoles in IR2 for the ALICE and in IR8 for the LHCb experiments respectively. The MBXWT and MBXWS have a core length of 1.5m and 0.75m respectively. Additionally on MBXW magnet serves as a main compensator for the LHCb experiment. The magnet design was done in collaboration between CERN and BINP and the dipole magnets are produced by BINP. So far all three MBXWS, all three MBXWT and thirteen of twenty-nine MBXW magnets including spares have been manufactured and delivered to CERN. The report presents the main design issues and results of the acceptance tests including mechanical, electrical and magnetic field measurements

Dr. Valeriy Vladimirovich Petrov: V.V.Petrov@inp.nsk.su


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