Equipment/Supplies Pg 4

EQUIPMENT / SUPPLIES (Pg 5)

METERING

In the above photo, the two large boxes contain the power supplies and analog meters for varian 531 thermocouple vacuum gauges. These are old units, have limited accuracy, and require frequent calibration, but they are still useful. The two small LCD meters at the bottom are reading the high voltage power supply output voltage (in kilovolts) and current (in milliamperes).. The orange Meterman digital multimeter is being used as a temporary readout for a Barocel capacitive Manometer vacuum gauge. The power supplies for the Barocel are not visible in the photo.

CALIBRATION

In this picture, the newly completed diffusion pump is being used to calibrate the Barocel capacitive manometer vacuum gauge, using a temporary setup. The white cylinder visible to the right of the bell jar is the Barocel unit. To the right of the diffusion pump, and being used to cool it, is a 5 inch muffin fan, being temporarily supported by some text books. The Leybold 2-stage vane-type pump (bottom left) is being used as a roughing pump for the diffusion pump. Also visible in the picture is the safety screen around the glass bell jar. The inner surface of the bell has been darkened by the effects of the fusor operation. The large turquoise object below the meters is a Variac autotransformer, used to control the power supply output.

For a description and picture of the power supply, see

Equipment/Supplies Pg 3

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Equipment/Supplies Pg 6