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Re: z-Position of the Lumi Monitor [message #9100 is a reply to message #9076]

Wed, 29 July 2009 15:58

Lars Schmitt
Messages: 47
Registered: April 2004
Location: GSI

continuous participant

From: *gsi.de

Dear Miriam, dear Tsito,

Bernd will be back Thursday next week. Concerning the
beam pipe: The wall thickness usually is 2% of the diameter,
at least for something like Al.

The size of the beam pipe is as given by HESR at the moment.
This comes from a time before any lumi monitor. Here input
is actually needed from you. Best coordinate closely with the
HESR people. Clearly the numbers are not fixed yet for the
part downstream of the target spectrometer.

Within the 2m space for the lumi monitor any adjustment of
beam pipe diameters has to take place. This holds especially
for the outgoing direction. For the upstream side of course
physics plays a role: All elastically scattered pbar you want to
measure with the lumi monitor should be contained in the
pipe. Maybe the best strategy is to open up early on, e.g. soon
after the MVD to the required diameter and then have a rather
big pipe all the way to the lumi monitor.

Regards,

Lars

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[Message index]

		z-Position of the Lumi Monitor By: Miriam Fritsch on Wed, 17 June 2009 15:36
		Re: z-Position of the Lumi Monitor By: Inti Lehmann on Mon, 22 June 2009 17:00
		Re: z-Position of the Lumi Monitor By: donghee on Thu, 23 July 2009 12:11
		Re: z-Position of the Lumi Monitor By: StefanoSpataro on Thu, 23 July 2009 12:23
		Accessibility By: Inti Lehmann on Fri, 24 July 2009 12:05
		Re: z-Position of the Lumi Monitor By: donghee on Thu, 23 July 2009 12:41
		Re: z-Position of the Lumi Monitor By: StefanoSpataro on Thu, 23 July 2009 12:57
		Re: z-Position of the Lumi Monitor By: Bernd Lewandowski on Tue, 28 July 2009 14:23
		Re: z-Position of the Lumi Monitor By: Miriam Fritsch on Tue, 28 July 2009 14:54
		Re: z-Position of the Lumi Monitor By: Lars Schmitt on Wed, 29 July 2009 15:58
		Re: z-Position of the Lumi Monitor By: Tsitohaina Randriamalala on Tue, 28 July 2009 14:49

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