From: Michael R. Kalish
Sent: Thursday, March 24, 2005 5:35 PM
To: Hutch Neilson
Cc: Wayne T. Reiersen; James H. Chrzanowski; Thomas G. Meighan; Geoffrey
J. Gettelfinger
Subject: RE: TF testing

Hutch,

The plan for testing the TF coils is to test:

Resistance
Inductance
Megger
Hipot
Impulse (used to identify breakdown in the turn to turn resistance)

We will perform each of these tests at room temperature and then at cryogenic temperatures.  It is likely that the most efficient way to test the coils in a cryostat will be to move them down to the coil test facility where the liquid nitrogen is available and all of the safety issues have been worked out.  I have not proposed it as of yet but we might consider whether there is any advantage to running current through the coils since much of the infrastructure exists in the coil test facility to do this.  I'm not sure we would learn enough to offset the effort and cost (the dollars in the existing estimate are being updated to reflect the cost of a cryostat and would require a much higher upward revision if we were to consider pulsing the coils).  Pulsing the coils in the coil test facility might provide us with a better turn to turn insulation resistivity test than performing the more common impulse testing.

Mike


Michael Kalish
Princeton Plasma Physics Laboratory
PO Box 451    Princeton, NJ    08543
Phone: (609) 243-2277
Fax:   (609) 243-3248

You can visit the home page of the
Princeton Plasma Physics Laboratory at
http://www.pppl.gov 



-----Original Message-----
From: Hutch Neilson 
Sent: Thursday, March 24, 2005 12:28 PM
To: Michael R. Kalish
Subject: TF testing

Mike,
What testing is planned for the TF coils?  I was asked by DOE, and don’t know the answer.
Thanks,
Hutch