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Sat May 9 00:15:21 2009, Yoichi, Update, PSL, Laser head temperature oscillation
Sat May 9 02:20:11 2009, Jenne, Update, PSL, Laser head temperature oscillation
Sat May 9 15:19:10 2009, rana, Update, PSL, Laser head temperature oscillation
Mon May 11 11:49:20 2009, steve, Update, PSL, MOPA cooling water lines are backwards
Thu May 21 18:07:32 2009, rana, Update, PSL, Screw on Needle valve loosened
Sat May 9 02:20:11 2009
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Laser head temperature oscillation
After the laser cooling pipe was unclogged, the laser head temperature has been oscillating in 24h period.
The laser power shows the same oscillation.
Moreover, there is a trend that the temperature is slowly creeping up.
We have to do something to stop this.
Or Rob has to finish his measurements before the laser dies.
How's DTEC doing? I thought DTEC was kind of in charge of dealing with these kinds of things, but after our laser-cooling-"fixing", DTEC has been railed at 0, aka no range.
After glancing at DTEC with Dataviewer along with HTEMP and AMPMON (my internet is too slow to want to post the pic while ssh-ed into nodus), it looks like DTEC is oscillating along with HTEMP in terms of frequency, but perhaps DTEC is running out of range because it is so close to zero? Maybe?