Re: neutron detector rings (fwd)

[John Blackburn <jblackbu@uiuc.edu>]

Hi Peter,
I was at Loomis till 4:30 yesterday.  I will work on the drawings today.

Thank you,
John Blackburn

At 11:25 AM 6/6/2005, you wrote:
>Dear Eric,
>
>No surprise in Rene's answer. If you don't mind and have
>the milling technique perfected :), let's stay with
>your original 20 cm design. That seems save and defines the
>position very well.
>
>I am writing you from Willard airport. Because of thunderstorms
>in Chicago my flight is delayed by 1 hour, we'll see whether I
>will catch the connection in Chicago to London.
>
>John, please send me the inventor drawing during Monday. Then
>on Tuesday, I will find out what the PSI shop is willing to do,
>but it should be ok.
>
>Thanks for all your efforts and best regards
>
>Peter
>
>Peter Kammel  /  pkammel@uiuc.edu
>Department of Physics, Loomis Laboratory
>University of Illinois at Urbana-Champaign
>1110 West Green Street, Urbana, IL 61801
>Tel (217) 333-5424 / Fax (217) 333-1215
>
>
>---------- Forwarded message ----------
>Date: Sun, 5 Jun 2005 21:03:46 +0200
>From: "[ISO-8859-1] René Prieels" <R.Prieels@fynu.ucl.ac.be>
>To: Peter Kammel <kammel@npl.uiuc.edu>
>Subject: Re: neutron detector rings
>
>Dear Peter,
>
>This will depend on the torque you will exert on the DEMON external
>tube. The external diameter is not precise enough to fit  closely into
>the holder ring you are speaking on.  There can be a small tilt. I
>nevertheless suspect that the external cylinder of the DEMON detector
>is rigid enough to sustain the torque even if inserted in a 10 cm
>length tube.
>On the other hand, the two independent rings  insures constraints on
>the whole, reduce the tilt  and define also the longitudinal  position
>of the detector.
>So there is a compromise between holding and the position versatility.
>Concerning the possibilities to vary the longitudinal position of the
>detector: 10 cm gives the biggest variations,  20 seems constraining,
>15 was ideal for us.
>So 10 cm seems not really forbidden.
>
>Best regards,
>Rene
>
>
>
>
>Le 05-juin-05, à 05:10, Peter Kammel a écrit :
>
> > Dear Rene,
> >
> > I am just getting ready to leave to PSI tomorrow. I talked
> > with our techs on Friday. Their neutron detector support
> > bars are well under way. One question here:
> > They are just milling support rings (to be welded on to the
> > bars) of 20 cm height. The Demon structure used 15 cm
> > high rings. Could we cut our rings in half to have only
> > 10 cm height? The other dimensions are very close to
> > the rings used at Demon.
> >
> > If would save us some milling work. But if there is
> > any doubt we will stay with our 20 cm height.
> >
> > Thanks
> >
> > Peter
> >
> >
>---------------------------------------------------------------------
>   René PRIEELS                                   Universite Catholique
>de Louvain
>   email: R.Prieels@fynu.ucl.ac.be     Departement de Physique / FYNU
>   Tel  : ++ 32 (0)10 / 47 32 09             Chemin du cyclotron, 2
>   Fax  : ++ 32 (0)10 / 45 21 83            B-1348 Louvain-la-Neuve -
>BELGIUM
>---------------------------------------------------------------------