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# What voltage should a 5000 Joule capacitor bank be for a TEA nitrogen laser be?

I am building a TEA Nitrogen laser and I will be using two 5000 Joule capacitor banks for the two capacitors. I am wondering what voltage should the two cap banks be at for the laser. All help is greatly appriciated.

## Comments

Best Answer 9 years ago

I don't recall how many farads you have.

Then you calc the voltage.

Energy = Capacitance × Voltage

^{2}/ 2V = square root ( 10,000 / C )

A

Answer 9 years ago

How many Farads will be determined by how many Volts I need for it to work.

Answer 9 years ago

That's going to depend on your laser tests isn't it ? Its related to the sparkgap dimensions.

You can't HAVE "5000J" banks, without knowing the working voltage.

Answer 9 years ago

There are two upper bounds on voltage.

- The distance of Jhon's gap of about 1 to 3 millimeters.
- The insulation you use in your capacitor

Now the Kyerohtaron TEA N_{2}Laser uses 4000 V so,C = E*2/V

^{2}= 5000 × 2 / ( 4000 × 4000 ) in FARADSC = 625 uF................ Tell us John how

large a foilcap is that ??Will it fit in a garage ??

Answer 9 years ago

I honestly don't know. I would like to use homeade capacitors, but I don't know the specifications for them so that I can build the two capacitor banks using them. I have decided that I will use around 4500V.