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- Newsgroups: sci.physics.fusion
- Path: sparky!uunet!cs.utexas.edu!sun-barr!ames!pacbell.com!UB.com!zorch!fusion
- From: ames!FNALD.FNAL.GOV!DROEGE
- Subject: Status #1 Cell 4A3
- Message-ID: <921221135641.20c01220@FNALD.FNAL.GOV>
- Sender: scott@zorch.SF-Bay.ORG (Scott Hazen Mueller)
- Reply-To: ames!FNALD.FNAL.GOV!DROEGE
- Organization: Sci.physics.fusion/Mail Gateway
- Date: Mon, 21 Dec 1992 21:02:46 GMT
- Lines: 36
-
- This weekend I went through the cleaning procedure and loaded a cell. I give
- myself D- on the job. I can now just imagine what a lab looks like to do this
- work properly. This is intended as a practice run for the new polished
- cathodes when I get them. This cell was loaded with a cathode that was rolled
- and then "polished" by me. The result is a surface that is worse that that
- which I started with. But I must be running on Christmas day. It is also a
- practice run for the Mark V/II calorimeter and for a lot of new code. Who
- knows what will happen when I tell it to ramp up to 60 C from the 4 C loading
- point.
-
- There is also a new gas system switch. It turns out the old one leaked and
- was the source of some of the mysterious gas measurements. The gas system
- looks really tight and held well within a cc for over a week, with all the
- changes due to room temperature.
-
- The present plan is to charge with a ramp that increases the cell current by
- about 20 ma per sq cm per 24 hours. I know this is not a copy of anybody's
- supposed successful result, but one has to use his head to try to guess what
- should work. So I am going for a very gentle loading of the lattice, and hope
- to get high loading by allowing plenty of time for things to move around.
-
- We put 200 ppm of Al into the electrolyte. We are also running a "dummy" Pt
- cathode as the most negitive electrode in the cell. This was turned on last
- night so it is likely cleaning out the 200 ppm Aluminum. We will be able to
- add more Al loaded electrolyte as does Mckubre as we run.
-
- This cell also has a heater on the catalyst. Earlier the catalyst would stop
- working at these low temperatures.
-
- We will start the ramp up in current at 4 C tonight.
-
- OK, Santa, I know they are scarce at the North Pole, but how about some joules
- for Christmas? I will settle for Epiphany as the charge time will better match
- January 6.
-
- Tom Droege
-