Assuming that the probe's probe's A axis is perpendicular to the R axis and to the Z axis of the sausage, while the center of the Hall sensor (the red dot) is in the "middle of the gap" and somewhere between OD and ID of the ferrite rings, sliding on the R axis, like this:  The diagram above depicts this, when the Z axis is poking you in the eye. - Assuming that the 0° probe rotation also means that its C axis is parallel to the Z axis, and its B axis coincides with the R axis. Consequently, the 0° probe rotation is sensitive to the radial flux and insensitive to the axial flux.
- Assuming that the 90° probe rotation also means that its B axis is parallel to the Z axis, and its C axis coincides with the R axis. Consequently the 90° probe rotation is insensitive to the radial flux and sensitive to the axial flux.
probe position current through coil flux measured
0° 0A S 0mT
90° 0A S 171mT
This is good. The 171mT might not be an impressive axial flux density, but it satisfies your cyclotron confinement radius. probe position current through coil flux measured
0° 8A S 6.8mT (cannot get it to 0mT)
This is wrong. The 0° probe rotation is sensitive to the radial flux, so it should read the maximum radial flux density, when 8A flows through the DC coil. probe position current through coil flux measured
90° 8A S 104mT
This is wrong. The 90° probe position is sensitive to the axial flux, so it should read the minimal axial flux density, when 8A flows through the DC coil (ideally 0mT). If the reading is high with the 90° probe rotation and 8A, then it could mean that there are too many or too few ampturns flowing through the coil to balance the magnet's flux ...and/or the coil is positioned a wrong distance from the gap.
|
Author
Topic: Grenade coil type systems (Read 39814 times)
