I'm having a bit of trouble understanding the haf-wave voltage doubler. I've copied and pasted the section from the book i'm reading to save typing it out:

I understand the first part where C1 is charging up. What I don't understand is how C2 can charge without C1 discharging. The book says that C1 cannot discharge (I guess because there is no resistor for it to discharge through), but any current which goes through C2 has to be going through C1 too. So is C1 not discharging at the same rate that C2 is charging?

If someone can explain it I'd be most grateful!

Cheers,

Jon.