Geoscience Reference
In-Depth Information
Discharge Chamber
To p V i e w
High Reflectance Mirror
s
Discharge Gap
(Discharge gap between
Needles is arranged here)
Discharge
Trigger
Delay/Pulse
Generator
Detector(p)
∆
l
2l
Detector(s)
Beam
Expander
Oscilloscope(p-s)
Polarization
Optics
CW Laser
Optical table
Fig. 2.
High-voltage discharge experiment.
Table 1.
Specification of high-voltage discharge experiment.
Light source
YAG Laser (
λ
= 532 nm) 150 mW (CW)
Detection
PDs with Amp. + Differential Amplifier
Discharge gap
3-10 cm
Discharge voltage
180 kV (max)
Beam path length
19-50 m (max)
3.2
. Simulation
A numerical calculation of the polarization plane rotation was performed.
The discharge current waveform was defined as that of the lightning return
stroke (peak current: 2 kA, 1/10 of the typical return current of cloud-
to-ground discharge).
6
−
8
The ionized electron density is assumed that the
