Inductively coupled plasma sources usually use argon as a fuel. Unfortunately, most ICP sources require at least 5 L/min of argon. This makes inductively coupled plasma a rather expensive source. The argon atoms are ionized with a spark from tesla coil. These ions will circulate due to the magnetic field to produce heat and high temperatures. This will cause additional ions to be formed from the argon fuel. After a period of time, the torch will reach temperatures between 6 000 and 10 000 Kelvin.