Lake Shore Model 421 Gaussmeter User’s Manual
C-2
Hall Generator
B
High Mobility III-V
Semiconductor
a) Indium arsenide
b) Gallium arsenide
+
+
+
+
e
v
Conventional
Current
Ic ()
(Green or Black)
B
VH ()
(Clear or Yellow)
VH (+)
(Blue)
Ic (+)
(Red)
v
F
F = e (v × B)
(force on electron)
C-421-C-1.eps
Figure C-1. Hall Generator Theory
C2.2 ORIENTATION
Hall generators come in two main configurations, axial and transverse. Transverse devices are
generally thin and rectangular in shape. They are applied successfully in magnetic circuit gaps,
surface measurements and general open field measurements. Axial sensors are mostly cylindrical in
shape. Their applications include ring magnet center bore measurements, solenoids, surface field
detection and general field sensing.
+B
+B
Transverse
Axial
C-421-C-2.eps
Figure C-2. Axial and Transverse Configurations
