Water Breakdown in Coax

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)

E_B-(- cond. breakdown)

%E_B-(100*E_-/E_B-)

E₊(+ cond. field)

E_B+(+ cond. breakdown)

%E_B+(100*E₊/E_B+)

E_A (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.

	Parameter	Value	Units	Special Values
Inputs:	V (voltage)
	l (length)
	r₊ (pos. radius)
	r_- (neg. radius)
	t (pulse duration)

Outputs:	E_-(- cond. field)
	E_B-(- cond. breakdown)
	%E_B-(100*E_-/E_B-)

	E₊(+ cond. field)
	E_B+(+ cond. breakdown)
	%E_B+(100*E₊/E_B+)

	E_A (mean field)
	a (center cond. corr.)