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- Path: sparky!uunet!ogicse!news.u.washington.edu!serval!luke.eecs.wsu.edu!kjones
- From: kjones@luke.eecs.wsu.edu (Kent Jones - EECS)
- Newsgroups: sci.physics.fusion
- Subject: Re: Status #7 Cell 4A3
- Message-ID: <1993Jan11.174415.20125@serval.net.wsu.edu>
- Date: 11 Jan 93 17:44:15 GMT
- Article-I.D.: serval.1993Jan11.174415.20125
- References: <930106131352.20c082a7@FNALD.FNAL.GOV> <1993Jan8.150648.365@walter.cray.com>
- Sender: news@serval.net.wsu.edu (USENET News System)
- Organization: Washington State University!
- Lines: 27
-
- In article <1993Jan8.150648.365@walter.cray.com> sxb@fermi.cray.com (Stephen Behling) writes:
- >
- >In article <930106131352.20c082a7@FNALD.FNAL.GOV>, DROEGE@fnald.fnal.gov writes:
- >> Status #7 Cell 4A3
- >[...]
- >> We are presently operating at 800 ma which results in a cell voltage of 4.5
- >> volts. Present calorimeter balance is at 7.300 watts. Peak to peak changes
- >> over the last several hundred hours are consistent with the 0.035 mw one sigma
- >> calibration. But there is an offset from the December calibration with only
- >> probable cause due to high temperature TED creep. Remember to get the
- >> temperature range we are operating with the shell servo off and floating. A
- >> curious observation is that we are more sensitive to the outside air
- >> temperature than to the room temperature. So while the room temperature is
- >> relatively constant, the calorimeter "sees" the outside through the dewar, 1
- >> 1/2" of foam, a (now) floating aluminum radiation shield, 1 1/2" foam, 10' of
- >> air, and an R19 house wall or R30 roof.
- >>
- > Especially in winter, inside air humidity is strongly correlated
- >with outside air temperature. Perhaps??
- >
- > -steve behling
-
- Could the barometric air pressure which is also related to the temperature
- be having any affect? i.e. could there be more gas absorption by the pd under
- greater pressure?
-
- Kent Jones
-