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fatllama's photostream
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Yb 2.0: atom oven
Ytterbium, enclosed in a water jacketed, filament heated molybdenum crucible, is heated to about 450°C...
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Uploaded on Aug 31, 2011
Yb 2.0: inside the main chamber, a differential pumping tube
The atomic vapor created in the back of the system emerges from this tube. Its small diameter (5 mm)...
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Uploaded on Aug 31, 2011
Yb 2.0: MOT coil mount
MOT coils are switched on and off frequently and quickly. The inductive kicks that result...
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Uploaded on Aug 31, 2011
Yb 2.0: main chamber
Here, several laser beams meet to slow, capture, cool, and confine a ytterbium atomic vapor. In 100ms,...
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Uploaded on Aug 31, 2011
Yb 2.0: MOT coil closeup
The square profile copper wire is hollow for carrying cooling water along with the ~120A needed to great...
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Uploaded on Aug 31, 2011
Yb 2.0: stem to stern
She's almost ready: our second ytterbium optical clock apparatus. This is a machine that serves as an...
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Uploaded on Aug 31, 2011
A stable high voltage
The output of this circuit; stable to the last digit (and beyond). On the 1kV range, this Keithley...
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Uploaded on Aug 31, 2011
~1kV adjustable voltage source with sub-ppm stability
A commercial high voltage source had noise and 1/f jitter that limited its stability to 0.01% over...
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Uploaded on Aug 29, 2011
The hamburger lamp UHV bake
It's been a week. 1e-8 Torr just isn't a low enough pressure. You've wrapped every piece of steel you...
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Uploaded on Aug 28, 2011
Reinventing the voltage regulator
About 10 minutes into figuring out your own design, you realize... this circuit is worked out completely by Horowitz and Hill.
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Uploaded on Aug 25, 2011
Mirror-polished aluminum
These are two walls of a polished aluminum heat (room temperature blackbody radiation) shield. The...
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Uploaded on Aug 15, 2011
Etalon/electrodes
<del>Winning.</del>
Would anyone care to estimate the conductance between the end of the atom effusion cell poking out of...
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Uploaded on Aug 15, 2011
What's wrong with this picture?
Can anyone see the problem? Or, is it simply: "I guess it ain't called a Fluke for nothing!"
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Uploaded on Mar 30, 2011
397nm light by doubling cavity
Another example of frequency doubling in a cavity, see also: (1), (2), (3). This is a long exposure;...
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Uploaded on Mar 20, 2011
A UHV viewport
A nice hunk of optical quality fused silica is brazed into this 6 inch ConFlat flange, and given a...
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Uploaded on Mar 18, 2011
Brew day, Oct. 10 2010
Going away party
A tour of the lab
Pacific Northwest
Metafilter: Ethiopian
Metafilter bowl-a-rama
Tallships festival
Amateur radio & gender...
