Photocathode studies
| Work done at UNM, starting July 2014. We received two samples of GaAs, on glass slides. The samples are about 10×10 mm. |
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| We mounted one sample in order to check the semiconductor properties of the sample. |
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| Lights off: ~infinite resistance, lights on: conductace. |
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| Make a transparent mesh to see if we can pull electrons out of the surface. Doug had some 20μm wire. Notch the edges of a small board with a 4/40 screw and a slotted standoff. | 
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| Wrap with the wire, using the notches as a guide, solder on the side away from the photocathode. | 
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| xxx | 
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We set up in a dark box.
No light-dependent current seen on the grid. | 
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| Next: set up in the vacuum chamber. (this is the controller for the xyz table in the vac chamber. If we use it, we need to get a serial-to-usb converter, and a driver. | 
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Hubert Van Hecke Last modified: Thu Sep 11 09:18:43 MDT 2014