From cdd@oddjob.uchicago.edu Wed Apr  9 09:54 CDT 1997
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Date: Wed, 9 Apr 1997 10:05:00 -0500 (CDT)
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From: "C. Darren Dowell" 
Message-Id: <199704091505.KAA01129@oddjob.uchicago.edu>
To: jdotson@nwu.edu
Subject: sparo bolometers
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Status: R


Jessie,

I made 20 bolometers for SPARO.  They will be coming up to Yerkes with
David this evening.  For the record, this is the recipe:

* 1 mil NbTi wire with Cu jacket; ~20 mil of jacket etched away.

* NTD Ge 10 thermistors, 250 um x 250 um x ~300 um

* thermistors etched about 20 seconds in mysterious acid etch from Yerkes

* indium solder ball used to attach thermistor to leads; about 3-5 mil
  diameter for each face

With the light angle right, it's pretty easy to see the bare NbTi part of
the lead.

The approximate thermal conductance should be 1 nW/K, but I would be
interested to hear an independent measurement of that.

Darren