Problem metalica SNF 2008-04-24 20:45:39: metalica pumping slow 4/23 @ 1:15 hrs, and on 4/24 @ 1:45 hrs

[jperez at snf.stanford.edu]

We timed the pump down to reach 1x10-6 and it took 1 hour 
and 15 min. In two hours we reached 6.5x10-7.
Temperature is at 13K.  Cryo maybe pumping slightly slower,
but still in a reasonable time.