Today, we calculate out the ion current in the circuit which the current source

need to supply.

 n is the density of the plasma. e is one electron charge. k is the Boltzmann constant which is 1.3807x10^-23. Te is the electron temperature.M is the mass of the proton. We use the value of the variable in the reference book and finally we find that the current should be nearly 2.4 mA.

 Therefore, we find the technician to rewrite our experimental component.

 The components are 4 zener diodes, 4 666ohm resisters, 4 PNP transistor, 4 NPN transistor, and 2 6Mohm resisters.The components mentioned above are used in the current source circuit. The other components we need is 2 diodes, 2 4.5v batteries, 3 3nF capacitors, and a dc power supply and a RF power supply.