here present in this artical you can get knowledge about the marx generator.
Definition:
A Marx generator is a type of electrical circuit whose purpose is to generate a high-voltage pulse by a number of capacitors that are charged in parallel and then connected in series by spark gap switches.
- A Marx generator is a type of electrical circuit first described by Erwin Otto Marx in 1924 whose purpose is to generate a high-voltage pulse.
- It is extensively used for simulating the effects of lightning during high voltage and aviation equipment testing.
- A bank of 36 Marx generators is used by Sandia National Laboratories to generate X-rays in their Z Machine.
- It can also be used as an ignition switch for thermonuclear devices.
Principle:
A number of capacitors are charged in parallel to a given voltage, V, and then connected in series by spark gap switches, ideally producing a voltage of V multiplied by the number, n, of capacitors (or stages). Due to various practical constraints, the output voltage is usually somewhat less than n×V.
The Marx generator consists of an array of resistors, capacitors and spark gaps arranged as follows in the schematic diagram.
The capacitors are charged up in parallel through the resistors, so they each become charged to the input voltage. When all of the spark gaps fires (sparks), the capacitors get effectively connected in series, therefor multiplying the input voltage by the number of capacitors and causing a long spark at the end of the marx generator. it is used to prevent a continuous arc forming across the first gap - this prevents further firing of the marx generator. The value of the resistor will mainly depend on the type of power supply is used, in this case, we are going to use an 10M resistor for this marx generator on this instructable. However, you can reduce the Bb's value to try get more 'bangs per second' without causing an arc forming on the spark gap.
Applications:
One application is so-called boxcar switching of a Pockels cell. Four Marx generators are used, each of the two electrodes of the Pockels cell being connected to a positive pulse generator and a negative pulse generator. Two generators of opposite polarity, one on each electrode, are first fired to charge the Pockels cell into one polarity. This will also partly charge the other two generators but not trigger them, because they have been only partly charged beforehand. Leakage through the Marx resistors needs to be compensated by a small bias current through the generator. At the trailing edge of the boxcar, the two other generators are fired to "reverse" the cell.
Amazing circuit and very useful
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