Electron energy recovery system for negative ion sources

Patent · Thu Oct 25 04:00:00 EDT 1979

OSTI ID:7067698

Dagenhart, W K; Stirling, W L

An electron energy recovery system for negative ion sources is provided. The system, employing crossed electric and magnetic fields, separates the electrons from the ions as they are extracted from the ion source plasma generator and before the ions are accelerated to their full energy. With the electric and magnetic fields oriented 90/sup 0/ to each other, the electrons remain at approximately the electrical potential at which they were generated. The electromagnetic forces cause the ions to be accelerated to the full accelerating supply voltage energy while being deflected through an angle of less than 90/sup 0/. The electrons precess out of the accelerating field region into an electron recovery region where they are collected at a small fraction of the full accelerating supply energy. It is possible, by this method, to collect > 90% of the electrons extracted along with the negative ions from a negative ion source beam at < 4% of full energy.

• DOE Contract Number: W-7405-ENG-26
• Assignee: Dept. of Energy
• Patent Number(s): None
• OSTI ID: 7067698
• Country of Publication: United States
• Language: English

Related Subjects

07 ISOTOPE AND RADIATION SOURCES
070201* -- Radiation Sources-- Design
Fabrication &amp; Operation
ACCELERATION
ANIONS
BEAMS
CHARGED PARTICLES
EFFICIENCY
ELECTRIC FIELDS
ELECTRIC POTENTIAL
ELECTRONS
ELEMENTARY PARTICLES
ENERGY RECOVERY
FERMIONS
ION BEAMS
ION SOURCES
IONS
LEPTONS
MAGNETIC FIELDS
OPERATION
PLASMA PRODUCTION
RECOVERY