Plasmas are generally created by generating free electrons and ions through super-heating. However, in a non-thermal plasma, the electrons are significantly hotter than the ions and neutrals. This temperature distribution, in combination with high pressure, results in collision and radiative processes that are important in a wide range of applications and that would otherwise only be possible to attain at extreme environmental conditions. Previous plasma generators have been unable to produce non-thermal, high pressure plasmas in large volumes due to instabilities which limit their practical utility. Miniaturized plasma sources with vertical structures generate stable, high pressure plasmas in large volumes.