Water Breakdown in Coax

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        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)

 

 

l (length)

 

 

r+ (pos. radius)

 

 

r- (neg. radius)

 

 

t (pulse duration)

 

 

 

 

 

 

 

Outputs:

E- (- cond. field)

 

 

EB- (- cond. breakdown)

 

 

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

 

 

 

 

 

 

 

 

 

E+(+ cond. field)

 

 

EB+ (+ cond. breakdown)

 

 

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

 

 

 

 

 

 

 

 

 

EA (mean field)

 

 

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