[Halld-tagger] location of floor plan for tagger building

[Richard Jones]

Hello Will and all,

The concept we had in mind here at UConn is to route the cables UNDER the tagger and then up overhead on the beam-left side of the hall.  The reason for this is to keep the cables from intersecting the path of the post-bremsstrahlung electrons.  Any extra material we put in the electron path will produce background in hall and degrade performance, maybe even decrease the lifetime of the electronics.

This is the opposite story for the fixed array cables -- there are about twice as many of those -- which start out above the beam height and want to stay that way all the way to the racks.

-Richard Jones


On 7/17/2013 5:17 PM, wcrahen wrote:
> Hi Rich and Chuck- would you please provide Richard with a simple drawing showing the path length from the hodoscope and Microscope to the racks. assume that all the Hodoscope cables are in cable trays directly above  and running parallel to the window flange at an elevation slightly above the Tagger gantry height. They will gather together approximately above the downstream end of the magnet, and go "North" (beam left) to the wall, then drop to the racks. The Microscope cables could just come across on the floor (in a enclosed tray with a plastic step-over bridge).
> On 7/17/2013 10:55 AM, Richard Jones wrote:
>> Hello Bill,
>>
>> I just browsed around in the Hall D engineering drawings database, but was unable to find a floor plan for the tagger building.  Can you point us to where we should look to find the most up-to-date drawings of the tagger building (also Hall D)? In particular we want to check out the distance to the racks and see if the 40' cables are going to reach.  To do that, we need the drawings to show the rack positions as currently envisioned.  The old civil drawings show them, but they are in the wrong location, next to the roll-up door.
>>
>> thank you,
>> -Richard Jones
>>
>


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