[Halld-pid-upgrade] Optical box update Re: DIRC Meeting: Tomorrow December 19 @ 1 pm

[Justin Stevens]

Hi Jason, Ernie, and Jim,

As you were unable to attend today’s meeting, please send an update to the mailing list on the status of the optical box.  A few other questions that came up today are below:

When should we expect to have a prototype of the “red bracket” to test the PMT mounting?  This will help in coordinating travel and when we’ll need to loan you a PMT/electronics board module from JLab for these tests.

Thank you for providing the drawing package for the box and STEP file last week.  Tim had a few questions from the drawings:
	1. The 1/4 and 3/4 npt holes on the bottom and top plates are for the water system, correct?
	2. The 1/2 npt is for some water level meter?
	3. Since there are no features for water on the side plates, I assume the FOB will be completely full with water and will exit through the top fitting in the 3/4 npt hole?
	4. If the box is completely full, no nitrogen purge is needed?
	5. The weld callout for the 1/8 inch plate to the frame calls for a 25mm fillet (see attached). Is this true?
	6. What is the fillet weld size on the inside of frame (opposite the seam weld)?

Finally, we need to discuss the assembly/installation sequence of the optical box at a future meeting.  Could you make a presentation on this at the next DIRC meeting on January 9th?

Happy Holidays,
Justin

> On Dec 18, 2017, at 3:03 PM, Justin Stevens <jrsteven at jlab.org> wrote:
> 
> Hi All,
> 
> We’ll have a DIRC meeting at 1 pm tomorrow.  The agenda can be found at https://halldweb.jlab.org/wiki/index.php/December_19,_2017_DIRC, please add items as necessary.
> 
> -Justin
> _______________________________________________
> Halld-pid-upgrade mailing list
> Halld-pid-upgrade at jlab.org
> https://mailman.jlab.org/mailman/listinfo/halld-pid-upgrade