The Swarthmore Spheromak Experiment

Ion Doppler Spectroscopy

Here is a schematic of the IDS setup.

schematic of the IDS setup

The blue fiber-optic cable links the SSX gadget to the sensor. The blue box houses the mirrors, while the black protrusion holds the photo multiplier tube (PMT).

picture of the sensor

Here you can see the business end of the sensor with its top off. The PMT is in the smaller box at the end with all the wires coming out of it.

the business end of the sensor

On the left is raw data from the PMT. Each line represents one cell of the PMT, and thus one frequency range. To the right is the processed speed data at t=58us converted in to a histogram.

raw data

processed data

Here is a series where the bidirectional flow is clearly visable.

a series

December 6, 2006 /

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