Hi Martijn,

thanks for coming around to discuss the VPTs.

With FIELD ON, the z value is +-3390mm.
Max VPT radius 1.71m

Cheers,

Dave.

________________________________

From: dr.ir.mulders@gmail.com [mailto:dr.ir.mulders@gmail.com] On Behalf
Of Martijn Mulders

Sent: 12 February 2009 21:26

To: Dave Cockerill
Subject: Re: VPT effects in CMS as a function of angle to field


Sounds good. See you tomorrow,

Martijn


On Thu, Feb 12, 2009 at 6:52 PM, Dave Cockerill <Dave.Cockerill@cern.ch>
wrote:


       Thanks - how about 10.00 at my office - 40-1-b20?

       Dave.

       ________________________________

       From: dr.ir.mulders@gmail.com [mailto:dr.ir.mulders@gmail.com]
On Behalf
       Of Martijn Mulders
       Sent: 12 February 2009 18:27
       To: Dave Cockerill
       Subject: Re: VPT effects in CMS as a function of angle to field



       Hello Dave,

       Sure; my agenda is fairly open tomorrow. We could meet
       for a coffee in building 40 any time during the morning if
       that works for you (?)

       Martijn


       On Thu, Feb 12, 2009 at 5:59 PM, Dave Cockerill
<Dave.Cockerill@cern.ch>
       wrote:



              Dear Martijn,

              Austin suggested I contact you concerning the magnetic
field map
       in CMS.

              I am the ECAL Endcap Project Manager. We have 7324 VPTs
at
       varying
              angles at each end of CMS, at a |z| of ~3.3m.
              We see a subtle differnece in response as a function of
       (supposed) angle
              to field, between the -ve and +ve ends.

              Would it be possible to meet to discuss what field
information
       you have?

              Many thanks,
              Dave Cockerill.