[Halld-pid-upgrade] Draft of Bar Box Shipping Plan

[Shepherd, Matthew]

Maria,

(This is a little tricky without a figure...  Joe can correct me if any of the below is incorrect as he has intimate knowledge of the insides of the bar boxes.)

In each of the two transverse dimensions the bars are constrained from each side by buttons.  In each dimension, on one side the buttons are spring loaded while the other side the buttons are fixed.  What we want in shipping is to be sure the weight of the bars is on the fixed buttons not the spring loaded ones.

We plan on shipping the boxes with the largest surface in the horizontal plane - the natural stable position you would rest the box in.  Depending on the bar box orientation in BaBar 1/2 the boxes have fixed buttons on the same side to which the wedges point and 1/2 have fixed buttons on the other side.  Practically this means that the shipping crate, in order to accommodate any of the BaBar boxes, needs to allow the bar box to be turned over (and accommodate the other orientation of the wedges).

The other dimension is relevant for installation:  a similar issue exists there, and we need to choose boxes such that the orientation of the wedges results in a configuration in GlueX in which the load of the bars rests on fixed buttons rather than spring loaded buttons.  

This also means that the choice of orientation of the optical box defines a subset of bar boxes from BaBar that are suitable for that choice.  Maximum flexibility can be achieved by choosing two orientations such that for each one could pick 2 of 6 boxes but the boxes for one couldn't be used for the other.

These are little details that we probably need to discuss and finalize soon.

Matt

---------------------------------------------------------------------
Matthew Shepherd, Associate Professor
Department of Physics, Indiana University, Swain West 265
727 East Third Street, Bloomington, IN 47405

Office Phone:  +1 812 856 5808

> On May 4, 2016, at 6:53 PM, Maria Patsyuk <mpatsyuk at mit.edu> wrote:
> 
> Do I understand correctly, that each bar box would be oriented inside the truck so that the bars are rested on the buttons?
> So that each bar box (depending where in the BABAR cylinder it was located) has a different shipping crate, which mimics the initial location of the bar box in the BABAR cylinder?
> 
> Best regards,
> Maria
> 
> 
>> On Apr 28, 2016, at 4:15 PM, Shepherd, Matthew <mashephe at indiana.edu> wrote:
>> 
>> 
>> Hi all,
>> 
>> As promised I've uploaded a first draft of a shipping plan for the DIRC bar boxes:
>> 
>> http://argus.phys.uregina.ca/cgi-bin/private/DocDB/ShowDocument?docid=2996
>> 
>> Please read and send comments.  It would be useful to discuss any comments at the DIRC/PID meeting a week from tomorrow.
>> 
>> I'd like to get a revised draft so that I can share it outside the collaboration.  It would be very useful to get feedback from Jerry, but I want to be sure that I'm accurately representing the consensus of our discussion from a few weeks ago.
>> 
>> Matt
>> 
>> ---------------------------------------------------------------------
>> Matthew Shepherd, Associate Professor
>> Department of Physics, Indiana University, Swain West 265
>> 727 East Third Street, Bloomington, IN 47405
>> 
>> Office Phone:  +1 812 856 5808
>> 
>> 
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