Method of automatic measurement and focus of an electron beam and apparatus therefore
Patent
·
OSTI ID:170473
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.
- Research Organization:
- AT&T
- DOE Contract Number:
- AC04-76DP00789
- Assignee:
- Sandia Corp., Albuquerque, NM (United States)
- Patent Number(s):
- US 5,483,036/A/
- Application Number:
- PAN: 8-142,077
- OSTI ID:
- 170473
- Resource Relation:
- Other Information: PBD: 9 Jan 1996
- Country of Publication:
- United States
- Language:
- English
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