Low energy electron magnetometer using a monoenergetic electron beam
Abstract
A low energy electron beam magnetometer utilizes near-monoenergetic electrons thereby reducing errors due to electron energy spread and electron nonuniform angular distribution. In a first embodiment, atoms in an atomic beam of an inert gas are excited to a Rydberg state and then electrons of near zero energy are detached from the Rydberg atoms. The near zero energy electrons are then accelerated by an electric field V(acc) to form the electron beam. In a second embodiment, a filament emits electrons into an electrostatic analyzer which selects electrons at a predetermined energy level within a very narrow range. These selected electrons make up the electron beam that is subjected to the magnetic field being measured.
- Publication:
-
National Aeronautics and Space Administration Report
- Pub Date:
- November 1983
- Bibcode:
- 1983nasa.reptW....S
- Keywords:
-
- Electron Beams;
- Electron Energy;
- Energy Levels;
- Magnetometers;
- Dye Lasers;
- Electrostatics;
- Nitrogen Lasers;
- Patents;
- Rare Gases;
- Rydberg Series;
- Instrumentation and Photography