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

[Fernando J Barbosa]

Hi Richard,

This seems to be a question for controls . The original plan was to have 
just fibers going to the counting house, no coax cables (maybe just a 
few now).

Best regards,
Fernando


On 11/6/2012 11:51 AM, Richard Jones wrote:
> 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
>>>
>>
>

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