|Consider a monochromatic
beam of atoms (mass ,
energy) incident on
a target plasma (made of ions with mass ,temperatue ,
and flow velocity ).
The beam atoms which scatter by an angle
from the plasma ions will have a Gaussian energy distribution, centered
with a full width at half-maximum of:
The energy spectrum of the scattered atoms is acquired by a12-channel electrostatic neutral particle analyzer. The ion flow velocity and temperature are deduced from the peak and the width of the measured energy spectrum.