Method and apparatus for charged particle propagation
Abstract
A method and apparatus are provided for propagating charged particles from a vacuum to a higher pressure region. A generator 14,14b includes an evacuated chamber 16a,b having a gun 18,18b for discharging a beam of charged particles such as an electron beam 12 or ion beam 12b. The beam 12,12b is discharged through a beam exit 22 in the chamber 16a,b into a higher pressure region 24. A plasma interface 34 is disposed at the beam exit 22 and includes a plasma channel 38 for bounding a plasma 40 maintainable between a cathode 42 and an anode 44 disposed at opposite ends thereof. The plasma channel 38 is coaxially aligned with the beam exit 22 for propagating the beam 12,12b from the chamber 16a,b, through the plasma 40, and into the higher pressure region 24. The plasma 40 is effective for pumping down the beam exit 22 for preventing pressure increase in the chamber 16a,b, and provides magnetic focusing of the beam 12,12b discharged into the higher pressure region 24.
- Inventors:
-
- Mount Sinai, NY
- Issue Date:
- Research Org.:
- Associated Universities, Inc., Upton, NY (United States)
- OSTI Identifier:
- 870701
- Patent Number(s):
- 5578831
- Application Number:
- 08/409,148
- Assignee:
- Associated Universities, Inc. (Washington, DC)
- Patent Classifications (CPCs):
-
H - ELECTRICITY H01 - BASIC ELECTRIC ELEMENTS H01J - ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- DOE Contract Number:
- AC02-76CH00016
- Resource Type:
- Patent
- Country of Publication:
- United States
- Language:
- English
- Subject:
- method; apparatus; charged; particle; propagation; provided; propagating; particles; vacuum; pressure; region; generator; 14; 14b; evacuated; chamber; 16a; gun; 18; 18b; discharging; beam; electron; 12; 12b; discharged; exit; 22; 24; plasma; interface; 34; disposed; channel; 38; bounding; 40; maintainable; cathode; 42; anode; 44; opposite; coaxially; aligned; effective; pumping; preventing; increase; provides; magnetic; focusing; pressure increase; plasma channel; beam exit; pressure region; axially aligned; charged particles; electron beam; charged particle; evacuated chamber; coaxially aligned; magnetic focusing; axially align; /250/219/
Citation Formats
Hershcovitch, Ady. Method and apparatus for charged particle propagation. United States: N. p., 1996.
Web.
Hershcovitch, Ady. Method and apparatus for charged particle propagation. United States.
Hershcovitch, Ady. Tue .
"Method and apparatus for charged particle propagation". United States. https://www.osti.gov/servlets/purl/870701.
@article{osti_870701,
title = {Method and apparatus for charged particle propagation},
author = {Hershcovitch, Ady},
abstractNote = {A method and apparatus are provided for propagating charged particles from a vacuum to a higher pressure region. A generator 14,14b includes an evacuated chamber 16a,b having a gun 18,18b for discharging a beam of charged particles such as an electron beam 12 or ion beam 12b. The beam 12,12b is discharged through a beam exit 22 in the chamber 16a,b into a higher pressure region 24. A plasma interface 34 is disposed at the beam exit 22 and includes a plasma channel 38 for bounding a plasma 40 maintainable between a cathode 42 and an anode 44 disposed at opposite ends thereof. The plasma channel 38 is coaxially aligned with the beam exit 22 for propagating the beam 12,12b from the chamber 16a,b, through the plasma 40, and into the higher pressure region 24. The plasma 40 is effective for pumping down the beam exit 22 for preventing pressure increase in the chamber 16a,b, and provides magnetic focusing of the beam 12,12b discharged into the higher pressure region 24.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Tue Nov 26 00:00:00 EST 1996},
month = {Tue Nov 26 00:00:00 EST 1996}
}
Works referenced in this record:
Magnetically Self-Focussing Streams
journal, June 1934
- Bennett, Willard H.
- Physical Review, Vol. 45, Issue 12