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
at:
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. Return to MST Homepage Return to RS Homepage
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