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Entry  Fri Jul 24 15:55:05 2015, Megan, Misc, Seismometer, Mini thermal enclosure test IMG_5371.JPGFullSizeRender.jpgIMG_5374.JPGIMG_5373.JPG
    Reply  Fri Jul 24 17:59:39 2015, rana, Misc, Seismometer, Mini thermal enclosure test 
Message ID: 1988     Entry time: Fri Jul 24 17:59:39 2015     In reply to: 1987
Author: rana 
Type: Misc 
Category: Seismometer 
Subject: Mini thermal enclosure test 

I've ordered some thermal paste (should show up at the 40m on Wednesday) for the thermistors and 2 silicone heaters for the panels. The silicone heaters are from McMaster (picked by Megan) and should allow us to deliver ~15 W of heat to the panels if we wire them in series.

The heat capacity of Aluminum is ~0.9 J/g/K or 45000 J/K for a 50 kg chunk. With no heat loss, that means it ought to take (45e4 J)/(15 J/s) ~ 9 hours to heat up the whole thing. Which is OK for maintaining the temperature, but pretty painful from the standpoint of initial warm up.

Perhaps we ought to just use the power supply we used for the reference cavity heaters. That one is too noisy for any kind of precision measurement, but ought to let us test the time constants of the box.

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