Patent ID: 8866389

Claim:
A plasma temperature control apparatus comprising: a plasma generating section that turns a plasma-generating gas into plasma; a plasma-generating gas temperature control section that controls a temperature of the plasma-generating gas, supplied to the plasma generating section, by allowing a single cooling section and a single heating section to cooperate with each other, the cooling section being provided in a supplying path that supplies the plasma-generating gas to the plasma generating section, and the heating section being provided on a downstream side of the cooling section in the supply path; and a temperature measuring section that measures a temperature of the plasma in the plasma generating section, wherein the temperature of the plasma measured by the temperature measuring section is fed back to the plasma-generating gas temperature control section, the plasma-generating gas is cooled by the cooling section, and the cooled plasma-generating gas is heated by the heating section, thus controlling the temperature of the plasma-generating gas, so that the temperature of the plasma generated in the plasma generating section is made lower than a temperature of plasma generated from a plasma-generating gas which is not controlled for temperature by the plasma-generating gas temperature control section.