[Halld-tagger] request for patch panel from collimator cave

[Richard Jones]

Hi Fernando,

The cabling plans that I have seen have focused on detector subsystems.  I don't think we have established plans yet for beamline related sensors that are not a part of the data acquisition.  Examples of this would be coax cables for video cameras looking at the radiator target, and background rate monitor scintillators that we will want placed at various locations along the beamline.  How many of these and where they will be placed is not fixed yet, but it will be very useful to have patch panels with connections to the counting house so we can look at various things when beam is in the hall.  The same thing goes for the collimator cave.  Especially during commissioning it will be useful to have measurements of background in the cave, and know how things are changing with beam tune, etc.

When I was thinking about these things, it struck me that it would be useful to also be able to view the currents from the active collimator directly in the counting house, and do the signal digitization there.  This way we do not have to put a data acquisition crate in the high-radiation area of the collimator cave and risk it rebooting, etc.  Especially during commissioning this would seem to be useful.

-Richard J.

On 11/6/2012 10:14 AM, Fernando J Barbosa wrote:
> Hi Richard,
>
> I have been talking about cables and such for years and you never requested these. Are these anywhere on the plans? Any details?
>
> Best regards,
> Fernando
>
> On 11/6/2012 9:08 AM, Richard Jones wrote:
>> Hi Fernando,
>>
>> I don't know where this request should be routed, so I am sending it directly to you.  I would like to make sure that we have coaxial connections from the upstream wall of the collimator cave to the counting house.  Here are some signals that we would like to be able to read directly, and minimize how much DAq electronics we need to place in a hot radiation area.
>>
>>  1. output signals from the active collimator: 8
>>  2. cave background rate monitor scintillators: 2-4
>>
>> A panel of 16 or 24 would be sufficient, I believe.  There are also controls for the collimator translation stage and associated limit switches.  Further downstream there is the converter target ladder, which may be inside the cave or outside, depending on the ability to shield the stray magnetic field from the pair spectrometer.  I just want to make sure we have cables and cable trays for these interconnects, as it may be difficult to add them later.
>>
>> -Richard Jones
>>
>

-------------- next part --------------
An HTML attachment was scrubbed...
URL: https://mailman.jlab.org/pipermail/halld-tagger/attachments/20121106/af4ac697/attachment-0001.html 
-------------- next part --------------
A non-text attachment was scrubbed...
Name: smime.p7s
Type: application/pkcs7-signature
Size: 3103 bytes
Desc: S/MIME Cryptographic Signature
Url : https://mailman.jlab.org/pipermail/halld-tagger/attachments/20121106/af4ac697/attachment-0001.bin