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That's correct. The air gap essentially acts like a really big resistor while the electrospray is happening. So, the low side circuitry will never see 4kV. If the air gap gets too small and turns into a spark gap, the plasma created by the arc will act as a much lower value resistor.
When...
For clarification, I already have a current measuring system, so I would rather not design one from scratch if it isn't necessary. I am specifically asking about the identification of multiplexer transistor architectures (if any) that are capable of switching ground to a no load, high Z or...
The range of the pico-ammeter is pico (well technically I guess fempto since the resolution on the lowest scale is 100 fA) through milli, so yes, I'm measuring nA with a "pico-ammeter". Now, back to our regularly scheduled program...
Hi all. I am experimenting with electrospray ionization. The setup has a 4kV power supply connected to an electrode that is separated from a return lug (or ground plate) via an air gap, followed by an inline pico-ammeter and finally ground. The way this works is that a small drop of solvent...
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