Discrimination between particle and radiation losses by using a time‐of‐flight type neutral particle energy analyzer

A time‐of‐flight type neutral particle energy analyzer can discriminate between neutral particle loss and radiation loss from a plasma by use of the difference between their times of flight. The energy distribution of hydrogen atoms which are emitted from the plasma can be estimated from the time evolution of the detector signal. The energy distribution of radiated photons can be obtained by using several filters which transmit different ranges of the photon energy. With this method the ratio of the particle and radiation losses emitted from the same plasma volume and within the same detector solid angle can be obtained.