here is the calculation.
Vpeak = Vrms x 1.4
= 240 x 1.4
= 336V
according to cockroft-walton voltage multiplier theory,
Vout = Vpeak x n , n being the number of stages.
i simulated a 6 stage voltage multiplier since there isn't sufficient space to simulate my whole circuit which will be 20 stages. software used was multisim.
simulation result for a 6 stage voltage multiplier is 2.005kV
by calculation;
Vout = 336V x 6
= 2.016kV
by this, i can assume that by calculation and by simulation the value of Vout is approximately the same, thus by practical it will be approximately the same value.
thus i conclude my actual circuit being 20 stages,
Vout = 336V x 20
= 6.720kV
the Vout of the voltage multiplier will be the Vin for my marx generator, which means my marx generator will be receiving an input of approx. 6.720kVdc.