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Re: CDC prototype
Friday at 10:00 works for Curtis as well -- Curtis
On Tue November 4 2008, Yves Van Haarlem wrote:
> Hi Tim,
>
> Friday 10am is good for both Gary and me. I believe it might be a problem
> for Curtis as he teaches on Friday mornings if I am not mistaken.
>
> Cheers,
> 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 Tue, 4 Nov 2008, Tim Whitlatch wrote:
>
> > Thanks Yves,
> >
> > We can discuss some of the ideas maybe later in the week. Are you, Gary and
> > Curtis available Friday 10am?
> >
> > Tim
> >
> > Yves Van Haarlem wrote:
> >> Hi All,
> >>
> >> I had some discussion with Gary and I can list some things we learned by
> >> wiring up this prototype:
> >>
> >> - The teflon wires are very stiff and difficult to handle, all the wires
> >> have the same length at the moment - it would make things easier if all
> >> wires have different lengths dependent on the distance: connector-wire.
> >> --> use different cable?
> >>
> >>
> >> - It would be good to glue the pin in the pinholder (add one drip of glue)
> >> after stringing the wires. In this way it is not so easy to break a wire if
> >> something goes wrong with connecting the cables to it. We plan to do this
> >> in the future.
> >>
> >>
> >> - Due to the fact that 8 straws are not read out (the preamp now has only
> >> 16 channels) the mapping is messed up (those 8 straws have to be on the
> >> edges) - this did not make things easier.
> >>
> >>
> >> Overall it was not easy to cable those straws up and more thinking is
> >> needed. We also plan on building a model to test more possibilies. Our
> >> priority at the moment is to finish the new prototype first.
> >>
> >>
> >> Cheers,
> >> 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 Fri, 31 Oct 2008, Yves Van Haarlem wrote:
> >>
> >>> Hi Tim,
> >>>
> >>> I believe not - but I am not 100% sure - we plan to build something larger
> >>> to simulate the real situation.
> >>>
> >>> Cheers,
> >>> 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 Fri, 31 Oct 2008, Tim Whitlatch wrote:
> >>>
> >>>> Thanks Yves,
> >>>>
> >>>> In the pictures it looks like the conductive rubber sleeves are highly
> >>>> strained. Also, was all the wiring done from 1 side to simulate the
> >>>> actual situation?
> >>>>
> >>>> Thanks,
> >>>>
> >>>> Tim
> >>>>
> >>>> Yves Van Haarlem wrote:
> >>>>> Hi Tim,
> >>>>>
> >>>>> Unfortunately Gary is sick at the moment and I was not here when the
> >>>>> wiring was done. But this is what I know:
> >>>>>
> >>>>>> How did the wiring to the crimp pins go?
> >>>>> It was a bit painful because of a weird mapping: 8 channels will not be
> >>>>> read out at first - so those had to go to the edges. We used Teflon
> >>>>> cables because those are better protected for soldering but they are
> >>>>> stiffer. The cables all have the same length and there is discussion to
> >>>>> make the lengths variable.
> >>>>>
> >>>>>> What order was the assembly done in (wires soldered to connector first?
> >>>>> First the connector is made gas tight. Then the wires are soldered to it
> >>>>> and marked plus the conductive booties are attached to the cables. I
> >>>>> believe then the connector is screwed on the end plenum and the wires
> >>>>> are moves over the crimp pins.
> >>>>>
> >>>>>> then connector secured and then wires connected to crimp pins)? How
> >>>>>> much sca for doing this between plexiglass and crimp pins?
> >>>>> The thickness of the end plenum is 2 inch, the length of the cables is 3
> >>>>> inch - they could have been shorter if not for this weird mapping.
> >>>>>
> >>>>> We believe that this method is not the perfect one and should be
> >>>>> improved. As soon Gary is here we have more info.
> >>>>>
> >>>>> Cheers,
> >>>>> Yves
> >>>>>
> >>>>>
> >>>>>>
> >>>>>> Thanks,
> >>>>>>
> >>>>>> Tim
> >>>>>>
> >>>>
> >>>
> >
>
--
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/