CMS vacuum chamber. Geometry for wakefield calculations

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Presentation transcript:

CMS vacuum chamber. Geometry for wakefield calculations information from Bernhard Holzer, Daniel Pitzl, Benoit Salvant Rainer Wanzenberg DESY Hamburg, June 13, 2012

“old” geometry See: LHC Project Note 418, May 27, 2009 Radius 29 mm New Chamber - 22 mm

New geometry New smaller beam pipe Existing cone (orange) will be extended Z = 1948 mm  1450 mm

“old” geometry but shorter bunches RMS Bunch length 7.5 cm, see LHC Project Note 418, May 27, 2009 Loss parameter: Bunch length 4 cm: preliminary results ~ 45 V / nC (heating of components ?) ~ 4.5 V / pC m Kick parameter: