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Re: New CDC prototypes II
On Fri, 4 Apr 2008, Yves Van Haarlem wrote:
Dear Yves,
thanks for the update. I was wondering don't we not want to see what the
recommendations from the review are? Maybe there is a chance to adress
them with this prototype, of course I have no idea what recommendations we
will get.
One other question are 24 straws really enough doing a full mechanical
test. I think it would be good to ask Tim for some advise on the scaling
of the prototype so we can test all the mechanical issues.
cheers elke
> Date: Fri, 4 Apr 2008 17:22:45 -0400 (EDT)
> From: Yves Van Haarlem <yvhaarle@ernest.phys.cmu.edu>
> To: halld-tracking-hw@jlab.org
> Subject: New CDC prototypes II
>
> Hi All,
>
> We just started to gather the necesary pieces for a prototype containing
> 24 straws (1 preamp) in 6 layers of 4 straws each - honeycomb packed. The
> (rectangular) endplates will be 9x8 cm2 and the chamber will be 40 cm
> long. The "upstream" end plate will be 9 mm thick Al, the "downstream" one
> 4 mm thick Carbon Fibre.
>
> Cheers and have a nice weekend,
> Yves
>
> /--------------------------------
> / Yves Van Haarlem
> _--~~--_ /
> /~/_| |_\~\ / Carnegie Mellon University
> |____________| / Department of Physics
> |[][][][][][]|:= / Wean Hall room 8404
> __| __ |__ \ Pittsburgh, PA 15213
> | ||. | == | | \ USA
> (| ||__| == | |) \
> | |[] [] == | | \ Tel.: +1 412 268-6949
> | |____________| | \ +1 412 641-9252
> /__\ /__\ \ Fax.: +1 412 681-0648
> ~~ ~~ \-----------------------------------
>
> On Wed, 2 Apr 2008, Fernando J. Barbosa wrote:
>
> > Hi Elke,
> >
> > For tests without a magnet, there is the AGS test line at BNL.
> >
> > For tests with a magnet, you may want to check if the MPS area is available
> > at BNL (that's where E852 ran). Alex may have good contacts there, also.
> >
> > Regards,
> > Fernando
> >
> > Elke-Caroline Aschenauer wrote:
> >> On Wed, 2 Apr 2008, Yves Van Haarlem wrote:
> >>
> >> Dear Yves,
> >>
> >> I think the question is what is the size of the prototype you want to
> >> build and what would you like to study. cosmic data in a magnetic field or
> >> beam on mini-cdc in B field, or ....
> >> Because if we want to match the situation of Gluex for different things we
> >> need different magnets.
> >> There was for example the offer to study something at Idaho Accelerator
> >> Center, but that needs more investigation.
> >>
> >> cheers elke
> >>
> >>
> >>
> >>
> >>> Date: Wed, 2 Apr 2008 10:36:07 -0400 (EDT)
> >>> From: Yves Van Haarlem <yvhaarle@ernest.phys.cmu.edu>
> >>> To: Simon Taylor <staylor@jlab.org>
> >>> Cc: halld-tracking-hw@jlab.org
> >>> Subject: Re: New CDC prototypes
> >>>
> >>> Hi Simon,
> >>>
> >>> Thanks a lot for the info. Could you give more information or a contact
> >>> person that might know more concerning this magnet?
> >>>
> >>> Thanks,
> >>> Yves
> >>>
> >>>
> >>> /--------------------------------
> >>> / Yves Van Haarlem
> >>> _--~~--_ /
> >>> /~/_| |_\~\ / Carnegie Mellon University
> >>> |____________| / Department of Physics
> >>> |[][][][][][]|:= / Wean Hall room 8404
> >>> __| __ |__ \ Pittsburgh, PA 15213
> >>> | ||. | == | | \ USA
> >>> (| ||__| == | |) \
> >>> | |[] [] == | | \ Tel.: +1 412 268-6949
> >>> | |____________| | \ +1 412 641-9252
> >>> /__\ /__\ \ Fax.: +1 412 681-0648
> >>> ~~ ~~ \-----------------------------------
> >>>
> >>> On Wed, 2 Apr 2008, Simon Taylor wrote:
> >>>
> >>>
> >>>> Hi, Yves.
> >>>>
> >>>> Regarding the availability of suitable magnets, the short answer is that
> >>>> it
> >>>> would be difficult to find any magnets with sufficient magnetic field or
> >>>> gap
> >>>> size or with the correct orientation for cosmic ray studies such that the
> >>>> magnetic field would be parallel to the straws. Certainly we came up with
> >>>> nothing truly suitable for studying the FDC. The magnet we used in Hall B
> >>>> has
> >>>> a gap of about 15 cm and goes up to ~1.2 Tesla. You could in principle
> >>>> fit a
> >>>> few layers of straws in there, but the magnetic field would be
> >>>> perpendicular
> >>>> to the wires, so that's no good. I have a vague recollection that there
> >>>> may
> >>>> be a magnet at Brookhaven that at least has a large enough gap size (48
> >>>> inches)...
> >>>>
> >>>> Simon
> >>>>
> >>>>
> >>>>
> >>>> Yves Van Haarlem wrote:
> >>>>
> >>>>> Hi All,
> >>>>>
> >>>>> As you might know we plan to build one or more smaller prototypes of the
> >>>>> CDC in order to test the straws in a test beam and magnetic field. The
> >>>>> first thing I would like to pin down are the dimensions of this new
> >>>>> prototype. In order to use it inside a magnet it has to fit inside that
> >>>>> magnet (yes indeed). I understood from last review that a magnet search
> >>>>> was
> >>>>> performed for the FDC so I am hoping they could give me some input on
> >>>>> what
> >>>>> is available.
> >>>>>
> >>>>> Cheers and thanks,
> >>>>> Yves
> >>>>>
> >>>>>
> >>>>> /--------------------------------
> >>>>> / Yves Van Haarlem
> >>>>> _--~~--_ /
> >>>>> /~/_| |_\~\ / Carnegie Mellon University
> >>>>> |____________| / Department of Physics
> >>>>> |[][][][][][]|:= / Wean Hall room 8404
> >>>>> __| __ |__ \ Pittsburgh, PA 15213
> >>>>> | ||. | == | | \ USA
> >>>>> (| ||__| == | |) \
> >>>>> | |[] [] == | | \ Tel.: +1 412 268-6949
> >>>>> | |____________| | \ +1 412 641-9252
> >>>>> /__\ /__\ \ Fax.: +1 412 681-0648
> >>>>> ~~ ~~ \-----------------------------------
> >>>>>
> >>>>
> >>
> >> ( `,_' )+=-+=-+=-+=-+=-+=-+=-+=-+=-+=-+=-+=-+=-+=-+=-+=-+=
> >> ) `\ -
> >> / '. | +
> >> | `, Elke-Caroline Aschenauer =
> >> \,_ `-/ -
> >> ,&&&&&V Jefferson Lab +
> >> ,&&&&&&&&: HALL-D 12C / F381 121-A Atlantic Avenue =
> >> ,&&&&&&&&&&; Suite 8 Hampton, VA 23664 -
> >> | |&&&&&&&;\ 12000 Jefferson Ave +
> >> | | :_) _ Newport News, VA 23606 Tel.: 001-757-224-1216 =
> >> | | ;--' | Mail: elke@jlab.org Mobil: 001-757-256-5224 -
> >> '--' `-.--. | +
> >> \_ | |---' Tel.: 001-757-269-5352 =
> >> `-._\__/ Fax.: 001-757-269-6331 -
> >> +=-+=-+=-+=-+=-+=-+=-+=-+=-+=-+=-+=-+=-+=-+=-+=-+=-+=-+=-+=-+
> >>
> >>
>
( `,_' )+=-+=-+=-+=-+=-+=-+=-+=-+=-+=-+=-+=-+=-+=-+=-+=-+=
) `\ -
/ '. | +
| `, Elke-Caroline Aschenauer =
\,_ `-/ -
,&&&&&V Jefferson Lab +
,&&&&&&&&: HALL-D 12C / F381 121-A Atlantic Avenue =
,&&&&&&&&&&; Suite 8 Hampton, VA 23664 -
| |&&&&&&&;\ 12000 Jefferson Ave +
| | :_) _ Newport News, VA 23606 Tel.: 001-757-224-1216 =
| | ;--' | Mail: elke@jlab.org Mobil: 001-757-256-5224 -
'--' `-.--. | +
\_ | |---' Tel.: 001-757-269-5352 =
`-._\__/ Fax.: 001-757-269-6331 -
+=-+=-+=-+=-+=-+=-+=-+=-+=-+=-+=-+=-+=-+=-+=-+=-+=-+=-+=-+=-+