[Dsg-rich] E-panel removal

[Marc McMullen]

Hi Marc and Sandro,

We looked at the RICH e-panel earlier today. Once it has been lifted (by 
hand/tool)  up out of the detector shell, it looks like the e-panel 
installation frame gets bolted on in 6 locations on the long sides of 
the e-panel. Once the e-panel is attached to the installation frame we 
should be able to lift it in its flat configuration. To do this lift we 
could add 3 swivel hoist rings to the extruded aluminum in the same 
manner as the swivel hoist rings used on the front panel installation 
tooling, only using 3 points to lift the panel straight up. In fact, we 
can use those exact hoist rings, they are rated to 550lbs each and the 
e-panel is 250-260lbs. The one thing we would have to figure out is the 
weight applied to the lift by the cables and the effect on the center of 
gravity.

I will sketch this idea up and speak with Mark Loewus about it, as this 
will require a new lift plan.

The OSP states that we must use a lift plan for the installation of the 
e-panel while using the gantry crane. _As long as we have a lift plan 
and use the gantry, we will be in within the parameters of the OSP as 
written, and will not need a new OSP.
_

After further conversations with Amrit, Marco, and George, we may not 
need to use the gantry at all. If we are just intending to lift the 
epanel out (6 to 8 inches)and hold it while silicon or RTV is being 
applied we may be able to use tall jack stands to hold unistrut which we 
would attach to the e-panel frame.

I will speak with Mark Loewus tomorrow and work on a 3 point lift, in 
the case that it is needed.

-- 
Marc McMullen
Detector Support Group
757-269-7738

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