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Lane Beale edited Experimental Setup.tex
about 10 years ago
Commit id: 881fb7a681a32961e9473d0f6b0cd6935a9147d1
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\section{Experimental Setup}
The plasma was created by an inductively coupled RF source operating at a power of 215 W with Helium as the working
gas.A gas. A voltage sweep was put across a langmuir probe 70 cm from the RF source 10 ms into the afterglow. A magnetic field was applied to the device through the use of two sets of four coaxial magnets created using 59.0 A and 24.5 A currents laid out around the device and resulting in a radially symmetric magnetic field through the device averaging to 63.5 Gauss along the axis.
Waves were generated in the plasma using a waveform generating antenna, in 5 frequencies ranging from 20Mhz to 120Mhz in 20Mhz steps. Measurements for
the 20Mhz data run began 5cm away from the
closest point the probe is allowed to be to the source to
the with 5 measurents taken in the z direction in 2 cm
steps.Angular steps. Angular measurements were taken 21 times in 1.3$^\circ$ steps. The same measurements and acquisititons were made in z and in angle except 31 angle measurements were taken for each set of frequencies for the 40-100 Mhz data runs. The 120 Mhz data run was taken 15 cm away from the allowed
distacne distance to the probe but instead 81 z measuremtns were taken at 0.37 steps and 51 angular measurements were
take taken at 1.0$^\circ$
steps.Electric steps. The electric field
is was measured
by an electric dipole probe,
shown as
shown in figure 1.