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Experimental demonstration of beam-beam compensation by Tevatron electron lenses and prospects for the LHC

Description: Electromagnetic long-range and head-on interactions of high intensity proton and antiproton beams are significant sources of beam loss and lifetime limitations in the Tevatron Collider Run II (2001-present). We present observations of the beam-beam phenomena in the Tevatron and results of relevant beam studies. We analyze the data and various methods employed in high energy physics (HEP) operation, predict the performance for planned luminosity upgrades and discuss ways to improve it.
Date: June 1, 2007
Creator: Shiltsev, V.; Alexahin, Y.; Kamerdzhiev, V.; Kuznetsov, G.; Zhang, X.L.; /Fermilab et al.
Partner: UNT Libraries Government Documents Department

Progress report on beam-beam compensation with electron lenses in Tevatron

Description: We discuss the original idea of beam-beam compensation (BBC) in Section I, sequence of events in 2001-2002 and use of the Tevatron Electron Beam (TEL) for DC beam removal in Section II, (anti)proton lifetime improvement in Section III, experimental data on the BBC attempts in Section IV and, conclusively, Section V is devoted to discussion on important phenomena, needed improvements and future plans.
Date: July 9, 2003
Creator: Shiltsev, Vladimir; Alexahin, Yu.; Kunznetsov, G.; Solyak, N.; Zhang, X.; Bishofberger, K. et al.
Partner: UNT Libraries Government Documents Department

Beam-beam compensation in Tevatron: Status report

Description: The project of beam-beam compensation (BBC) in the Tevatron using electron beams [1] has passed a successful first step in experimental studies. The first Tevatron electron lens (TEL) has been installed in the Tevatron, commissioned, and demonstrated the theoretically predicted shift of betatron frequencies of a high energy proton beam due to a high current low energy electron beam. After the first series of studies in March-April 2001 (total of 7 shifts), we achieved tuneshifts of 980 GeV protons of about dQ=+0.007 with some 3 A of the electron beam current while the proton lifetime was in the range of 10 hours (some 24 hours at the best). Future work will include diagnostics improvement, beam studies with antiprotons, and fabrication of the 2nd TEL.
Date: July 12, 2001
Creator: Shiltsev, Vladimir D.; Kuznetsov, G.; Solyak, N.; Wildman, D.; Zhang, X. L.; Alexahin, Yu. et al.
Partner: UNT Libraries Government Documents Department

Tevatron beam-beam compensation project progress

Description: In this paper, we report the progress of the Tevatron Beam-Beam Compensation (BBC) project [1]. Electron beam induced proton and antiproton tuneshifts have been reported in [2], suppression of an antiproton emittance growth has been observed, too [1]. Currently, the first electron lens (TEL1) is in operational use as the Tevatron DC beam cleaner. We have made a lot of the upgrades to improve its stability [3]. The 2nd Tevatron electron lens (TEL2) is under the final phase of development and preparation for installation in the Tevatron.
Date: May 1, 2005
Creator: Shiltsev, V.; Zhang, X. L.; Kuznetsov, G.; Pfeffer, H.; Saewert, G.; /Fermilab et al.
Partner: UNT Libraries Government Documents Department