Minutes For 4 July 2000

Present: GV, AD, MLenc, PB


The plywood for the weld sample crates has arrived. The crate will be 
made and shipped out ASAP.

The 3" x 5" plastic bags for protecting the Micro-D connectors have
arrived.

No Bellows Assemblies, Pigtails, or Vacuum Cables have arrived. We are
still expecting some of these to arrive at any time

Phred was repaired and tested on Friday, it had a chip replaced that had
an intermittent fault. 

The pin carrier cooler had shown signs of increased current for its ion
pump, A leak check detected a minor leak, this was sealed and current
levels are now back to normal.

All of the VCR Tee glands have been tested, all of the new glands (the
four most recent) now seal and 4 of the 6 of the original glands seal.
Most sealed with 1/8th of a turn of the nut. A couple required 1/6th of a
turn. 

	Providing there isn't a ding across the sealing face, it looks as
	if the VCR fittings can be polished until they seal - if required. 
	We are also looking at the possibility that the VCR seals degrade
	each time they are used and the more they are tightened the more 
	they degrade. Under normal conditions the nut for the seals should 
	not be tightened more then 1/8th of a turn.

	For the future we are looking at using a neoprene washer for our 
	leak tests involving the VCR glands. The copper gaskets for the 
	VCRs also come with a silver plated version, which might help to 
	reduce damage. We will continue to explore the causes of the 
	problems we are having with the VCR fittings.

Feedthrough 0

The welder will be coming tomorrow to weld one set of warm and cold
flanges. This involves four pincarries in each flange and two VCR glands
in the warm flange.