Calculate:
Breakdown
Fields      Output
Format        Notes

Definition:

Equations

Parameters

Diagram

Calculate Breakdown Fields in Water-Filled
Coax:              top

Parameter

Value

Units

Special
Values

Inputs:

V
(voltage)

voltskilovoltsMegavoltsmillivoltsmicrovolts____________________

l
(length)

meterscentimetersmillimetersmicrometersnanometersinchesfeetmilsyardsmileskilometerslightyears____________________

r+ (pos.
radius)

r- (neg.
radius)

t (pulse duration)

secondsmicrosecondsnanosecondsmillisecondsdayhour (h)minute
(min)sidereal dayyear
(yr)____________________

Outputs:

E-
(- cond. field)

volts/meterkilovolts/metermegavolts/metervolts/cmkilovolts/cmmegavolts/cm____________________

EB- (- cond.
breakdown)

volts/meterkilovolts/metermegavolts/metervolts/cmkilovolts/cmmegavolts/cm____________________

%EB-
(100*E-/EB-)

E+(+ cond.
field)

volts/meterkilovolts/metermegavolts/metervolts/cmkilovolts/cmmegavolts/cm____________________

EB+ (+ cond.
breakdown)

volts/meterkilovolts/metermegavolts/metervolts/cmkilovolts/cmmegavolts/cm____________________

%EB+
(100*E+/EB+)

EA (mean
field)

volts/meterkilovolts/metermegavolts/metervolts/cmkilovolts/cmmegavolts/cm____________________

a
(center cond. corr.)

Output
Format:
top

Select
Format:

Scientific

Engineering

Fixed

Notes:
top

The breakdown field of the center conductor should be multiplied by a
(up to values of 1.2) for better accuracy in cases where the field at the center
conductor is highly enhanced.

The "mean" field is just the field between parallel plates with the same
distance between conductors and voltage.

In cases where the entire area is not stressed, use that area which exceeds
90% of the maximum stress.

Source:  Pulsed Power Formulary with interpretation from Ron
Boller.

Copyright ?2000-2001  Raymond J. Allen