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z-Position of the Lumi Monitor [message #8876]

Wed, 17 June 2009 15:36

Miriam Fritsch
Messages: 8
Registered: March 2009
Location: Uni Mainz

occasional visitor

From: *to.infn.it

Hi,

what is the z-range we could use for the Lumi detector ??

Cheers,

Miriam

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Re: z-Position of the Lumi Monitor [message #8894 is a reply to message #8876]

Mon, 22 June 2009 17:00

Inti Lehmann
Messages: 3
Registered: September 2005
Location: Glasgow, UK

occasional visitor

From: *physics.gla.ac.uk

Hi Miriam,

I recall now, why I didn't choose the forum as means of communication for the magnets. One cannot do anything offline and this beast even forgets my password.... Sad

Anyway, for the dimesions you should look at:
http://www-panda.gsi.de/html/det/int/panda_v0.1.15.pdf

In doubt, Bernd is the one to be asked.

Cheers,
Inti

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Re: z-Position of the Lumi Monitor [message #9043 is a reply to message #8894]

Thu, 23 July 2009 12:11

donghee
Messages: 385
Registered: January 2009
Location: Germnay

first-grade participant

From: *dip.t-dialin.net

Hi Inti Lehmann,

I cannot access this file.
http://www-panda.gsi.de/html/det/int/panda_v0.1.15.pdf

I have already GSI forum ID and GSI account, but authentication is failed with these account.
Do I need some additional registration?

Thank you!

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Re: z-Position of the Lumi Monitor [message #9044 is a reply to message #9043]

Thu, 23 July 2009 12:23

StefanoSpataro
Messages: 2736
Registered: June 2005
Location: Torino

first-grade participant

From: *to.infn.it

You need to use the standard panda password for the panda website, not your personal account.
Just ask somebody in your group (I do not think writing it in the forum would be wise).

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Re: z-Position of the Lumi Monitor [message #9045 is a reply to message #8876]

Thu, 23 July 2009 12:41

donghee
Messages: 385
Registered: January 2009
Location: Germnay

first-grade participant

From: *dip.t-dialin.net

Hi Stepano,

I have seen there is no indication and designing of Lumi.
This is only a general panda drawing and nothing else for Lumi.

Where is the location for Lumi-monitor, correctly in pandaroot?
or where can I find the Lumi geometry in pandaroot?
/pandaroot/Lumi ?

Thank you!

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Re: z-Position of the Lumi Monitor [message #9046 is a reply to message #9045]

Thu, 23 July 2009 12:57

StefanoSpataro
Messages: 2736
Registered: June 2005
Location: Torino

first-grade participant

From: *to.infn.it

The developer of "lumi" package is Tsito.
Just ask him (maybe he does not read the forum continuosly).

[Updated on: Thu, 23 July 2009 12:57]

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Accessibility [message #9066 is a reply to message #9044]

Fri, 24 July 2009 12:05

Inti Lehmann
Messages: 3
Registered: September 2005
Location: Glasgow, UK

occasional visitor

From: *physics.gla.ac.uk

Hi all,

Let me play devil's advocate Evil or Very Mad

The format, delivery and access to those mailing lists is so poor, that you should send any urgent questions to me directly:
i.lehmann@physics.gla.ac.uk

Cheers,
Inti

PS: If someone would manage to remove the "New reply to" from the subject line it may already help a bit...

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Re: z-Position of the Lumi Monitor [message #9076 is a reply to message #8876]

Tue, 28 July 2009 14:23

Bernd Lewandowski
Messages: 7
Registered: September 2005

occasional visitor

From: *gsi.de

Hi Miriam,

after bringing together the actual numbers of the detectors in the forward spectrometer: The z-range of the Lumi detector is 10500mm to 12500mm.
At 10500mm the outer diameter of the beampipe is 110mm, same as at the z position of 12500mm.
So the parts to change the beampipe diameter for the Lumi detector are included in the 2m (z=10500mm - 12500mm).

Best Regards,
Bernd

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Re: z-Position of the Lumi Monitor [message #9077 is a reply to message #8876]

Tue, 28 July 2009 14:49

Tsitohaina Randriamalala
Messages: 14
Registered: October 2007
Location: FZ Jülich

occasional visitor

From: *ikp.kfa-juelich.de

Hi Bernd,
How about the beampipe thickness in this 2 meters lumi monitor region?
Thanks

Tsito

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Re: z-Position of the Lumi Monitor [message #9078 is a reply to message #9076]

Tue, 28 July 2009 14:54

Miriam Fritsch
Messages: 8
Registered: March 2009
Location: Uni Mainz

occasional visitor

From: *pool.mediaWays.net

hi Bernd,

thank you for the numbers !! Why the number of 110 mm diameter was chosen ?? Is there a reason ??

Cheers,

Miriam

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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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