Method of automatic measurement and focus of an electron beam and apparatus therefore
Abstract
An electron beam focusing system, including a plural slit-type Faraday beam trap, for measuring the diameter of an electron beam and automatically focusing the beam for welding is disclosed. Beam size is determined from profiles of the current measured as the beam is swept over at least two narrow slits of the beam trap. An automated procedure changes the focus coil current until the focal point location is just below a workpiece surface. A parabolic equation is fitted to the calculated beam sizes from which optimal focus coil current and optimal beam diameter are determined. 12 figs.
- Inventors:
- Issue Date:
- Research Org.:
- AT&T
- OSTI Identifier:
- 170473
- Patent Number(s):
- 5483036
- Application Number:
- PAN: 8-142,077
- Assignee:
- Sandia Corp., Albuquerque, NM (United States)
- DOE Contract Number:
- AC04-76DP00789
- Resource Type:
- Patent
- Resource Relation:
- Other Information: PBD: 9 Jan 1996
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 36 MATERIALS SCIENCE; ELECTRON BEAM WELDING; PROCESS CONTROL; ELECTRON BEAMS; FOCUSING; BEAM MONITORS; BEAM PROFILES; AUTOMATION
Citation Formats
Giedt, W H, and Campiotti, R. Method of automatic measurement and focus of an electron beam and apparatus therefore. United States: N. p., 1996.
Web.
Giedt, W H, & Campiotti, R. Method of automatic measurement and focus of an electron beam and apparatus therefore. United States.
Giedt, W H, and Campiotti, R. Tue .
"Method of automatic measurement and focus of an electron beam and apparatus therefore". United States.
@article{osti_170473,
title = {Method of automatic measurement and focus of an electron beam and apparatus therefore},
author = {Giedt, W H and Campiotti, R},
abstractNote = {An electron beam focusing system, including a plural slit-type Faraday beam trap, for measuring the diameter of an electron beam and automatically focusing the beam for welding is disclosed. Beam size is determined from profiles of the current measured as the beam is swept over at least two narrow slits of the beam trap. An automated procedure changes the focus coil current until the focal point location is just below a workpiece surface. A parabolic equation is fitted to the calculated beam sizes from which optimal focus coil current and optimal beam diameter are determined. 12 figs.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1996},
month = {1}
}
Save to My Library
You must Sign In or Create an Account in order to save documents to your library.