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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 +
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>> ,&&&&&&&&&&; Suite 8 Hampton, VA 23664 -
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>> | | ;--' | Mail: elke@jlab.org Mobil: 001-757-256-5224 -
>> '--' `-.--. | +
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>> `-._\__/ Fax.: 001-757-269-6331 -
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