[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
Re: Detector Specs (fwd)
Updated position accuracy to 40 microns.
Cheers, Elton.
Elton Smith
Jefferson Lab MS 12H5
12000 Jefferson Ave
Suite # 16
Newport News, VA 23606
elton@jlab.org
(757) 269-7625
On Tue, 8 Jan 2008, Curtis A. Meyer wrote:
> Hi Elton -
>
>
> On Tue January 8 2008, Elton Smith wrote:
> >
> > Hi Curtis,
> >
> > Tim has checked dimensions in the specifications document. I have made
> > appropriate updates as indicated below. Please verify changes.
> >
> > Thanks, Elton.
> >
> >
> > -------------------------------------
> >
> > I have been looking over this document and have the following comments:
> >
> > The start counter radius of 6.5 cm will work with the current CDC inner
> > radius.
> >
> > ES: good.
> >
> > CDC 150 cm long in table 3, 175 cm long in table 4
> >
> > ES: Changed table 4 downstream active volume to 167 cm, downstream gas
> > plenum to 177 cm.
>
> CAM: Good
> >
> >
> > I don't believe the positioning accuracy of the CDC sense wires could be
> > 10um
> >
> > ES: CDC should review their requirements for positioning accuracy.
>
> CAM: I think that this is 40um, but we anticipate measuring them to better than
> this.
>
> >
> > FCAL Radius should be 1200mm or 120cm
> >
> > ES: Fcal radius set to 120 cm.
> >
> > Also, on the CDC , the outer shell thickness shows 1.02 cm. This will
> > probably be on the order of 2mm.
>
> CAM: Probable 2 or 3mm, I need to chat with Tim. 1cm is clearly too much
> >
> > ES: Changed outer shell to 0.2 cm and 0.06 radiation lengths. Note that
> > dimensions should be reviewed and/or units changed.
> >
> >
> > Tim
> >
> > Elton Smith wrote:
> > > Hi Werner and Simon,
> > >
> > > I have updated the specification document GlueX-866 based on your input.
> > > Please check the updates are correct.
> > >
> > > We should make sure that iterations with the start counter are consistent
> > > with the present mechanical design, so I have added Tim and Chuck to this
> > > list so they can take a look at it also.
> > >
> > > Thanks, Elton.
> > >
> > >
> > >
> > >
> > >
> > > Elton Smith
> > > Jefferson Lab MS 12H5
> > > 12000 Jefferson Ave
> > > Suite # 16
> > > Newport News, VA 23606
> > > elton@jlab.org
> > > (757) 269-7625
> > >
> > > On Fri, 4 Jan 2008, Werner Boeglin wrote:
> > >
> > >
> > >> Hi Elton,
> > >>
> > >> happy new year !
> > >>
> > >> Attached is the start counter specification using the standard high
> > >> field PMT. This may change later of course. The dimensions are
> > >> approximate (to withing one mm). I hope this is what you need.
> > >>
> > >> kind regards
> > >>
> > >> Werner
> > >>
> > >> --
> > >> Werner U. Boeglin e-mail: boeglinw@fiu.edu
> > >> Department of Physics Phone: (305) 348 1711
> > >> Florida International University Secretary: (305) 348 2605
> > >> University Park,Miami, FL 33199 FAX: (305) 348 6700
> > >>
> > >>
> > >>
> > >>
> > >>
> > >>
> > >>
> > >>
> > >>
> > >
> > >
> >
>
>
>
> --
> Professor Curtis A. Meyer Department of Physics
> Phone: (412) 268-2745 Carnegie Mellon University
> Fax: (412) 681-0648 Pittsburgh PA 15213-3890
> cmeyer@ernest.phys.cmu.edu http://www.curtismeyer.com/
>