The above picture shows our interferometer with the stepper motor attached.  Other equipment includes:

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Focusing lenses

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High voltage power supply Berton Associates Model 205A- 05R

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Ammeter Keithley Instruments, Inc 410A Ammeter

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Photodiode

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Homemade PMT in a box 

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and Pasco Interface with computer.

Optical Path for the interferometer.

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