If this theory is applied correctly to the IV characteristic (as shown in the demo video) very accurate measurements of the plasma properties can be obtained. This is a true for all plasma types - not just CC rf plasma. If you are using your probe in a CC rf plasma you should consider the need for 'rf compensation' of the plasma excitation frequency. We would be happy to share more information on this topic if you have further queries. info@impedans.com
This demo was performed using a cylindrical probe. A saturated electron current is not possible for this type of probe. When the bias applied to the probe is increased the cylindrical sheath around the probe increases. This necessarily increases the probe collection area as a result. Most theory does indeed account for this using 'sheath expansion' terms.
In theory a flat 'planar' Langmuir probe shows a saturated electron current. This is due to the assumption that the sheath edge and probe face remain parallel regardless of the potential applied and therefore the effective collection area does not increase. This is not observed in reality since the 'real' sheath often curves into a hemispherical shape above the planar probe (changing as a function of applied potential) and increases the effective area from which ions can be collected bythe probe
This is the result of an automated probe? Is it typical for the electron current not to saturate in the case of CC RF plasma? I have tried to get a solid Langmuir curve from ours using a probe I put together, but the curve looks like this one (with resistive elements), not like the ones we see in theory.
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If this theory is applied correctly to the IV characteristic (as shown in the demo video) very accurate measurements of the plasma properties can be obtained. This is a true for all plasma types - not just CC rf plasma. If you are using your probe in a CC rf plasma you should consider the need for 'rf compensation' of the plasma excitation frequency. We would be happy to share more information on this topic if you have further queries. info@impedans.com
ImpedansTV 4 months ago
This demo was performed using a cylindrical probe. A saturated electron current is not possible for this type of probe. When the bias applied to the probe is increased the cylindrical sheath around the probe increases. This necessarily increases the probe collection area as a result. Most theory does indeed account for this using 'sheath expansion' terms.
ImpedansTV 4 months ago
In theory a flat 'planar' Langmuir probe shows a saturated electron current. This is due to the assumption that the sheath edge and probe face remain parallel regardless of the potential applied and therefore the effective collection area does not increase. This is not observed in reality since the 'real' sheath often curves into a hemispherical shape above the planar probe (changing as a function of applied potential) and increases the effective area from which ions can be collected bythe probe
ImpedansTV 4 months ago
This is the result of an automated probe? Is it typical for the electron current not to saturate in the case of CC RF plasma? I have tried to get a solid Langmuir curve from ours using a probe I put together, but the curve looks like this one (with resistive elements), not like the ones we see in theory.
DeverNorMan 4 months ago
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Free inexhaustible energy is real!But the big oil corporations don't want that technology revealed,Get a REAL working magnet motor at LT-MAGNET-MOTORdotCOM ,Join the revolution!
slanderousndgs 1 year ago