|
Hall Probes: Measures magnetic field
Hall probes use the Hall effect to measure steady
magnetic fields. The principle of
how it works is as follows. A
semiconductor resides within a magnetic field.
A current is passed through the semiconductor and the current carriers
feel a Lorentz force due to the motion. This
results in a charge build up on the faces of the semiconductor, which creates an
electric field. This additional
field cancels the magnetic force and is sensible by electrodes on the
semiconductor faces. The
combination of the Hall probe with electronics is often called a Gaussmeter.
Shielded, water-cooled hall probes were developed
at PEPL, to measure the magnetic field in Hall thrusters during operation. Both
axial and transverse probes were constructed and found to be accurate to within
7 gauss
|
|
|
- Domonkos,
M. T., Gallimore, A. D., and Bilén, S., "A Hall Probe Diagnostic for Low Density Plasma
Accelerators," Review
of Scientific Instruments, Vol. 69, No. 6, June 1998, pp.
2546-2549.
|
|
