Determining the spectrum of penning electrons by current to a wall probe in nonlocal negative glow plasma

It was shown that the spectrum of Penning electrons in a nonlocal equipotential plasma is associated with the second derivative of their current to a wall electrode (sensor). Analytical calculations are confirmed by experimental studies in a negative glow plasma of short DC glow discharge at moderate and high pressures (up to 150 Torr). Published by AIP Publishing.