Colin Ribton

20180910-01
Production weld quality assurance through monitoring of beam characteristics
Colin Ribton, Arben Ferhati, Nick Longfield, Phil Juffs

Cite as:

This paper describes the development of a quality assurance tool for production electron beam welding. The BeamAssure probe system has been installed on a number of production and development electron beam machines. The hardware ...  read more

20140506-40
An RF Excited Plasma Cathode Electron Beam Gun Design
Sofia del Pozo, Colin Ribton, David R. Smith

Cite as:

A plasma cathode electron beam (EB) gun is presented in this work. A radio frequency (RF) excited plasma at 84 MHz was used as the electron source to produce a beam power of up to 3.2 kW at -60 kV accelerating voltage. The ...  read more

20140506-39
Characterisation of electron beams generated by a plasmacathode gun
Nikolay Rempe, Sergey Kornilov, Alexander Beniyash, Nils Murray, Thomas Hassel, Colin Ribton

Cite as:

The paper is devoted to electron beam guns based on the emission of electrons from plasma of a hollow-cathode reflective discharge. The measuring of the diameter and brightness of beam with the rotating wire sensor and scanning ...  read more

20140506-37
High Angle, High Integrity Beam Deflection
Colin Ribton

Cite as:

Electron beam surface treatment and 3D printing impose stringent beam deflection requirements. The deflection must be of high frequency (some 50 kHz), high amplitude (10 s of μm) and accurate (to within 10 microns). Methods ...  read more

20180506-07
Investigation of long-life cathode EB guns for welding of turbochargers
Sofia del Pozo, Colin Ribton

Cite as:

This paper describes a laser heated cathode gun design which uses a lanthanum hexaboride button in a diode configuration. Beam currents up to 40 mA at – 60 kV were generated by using laser powers in the range of 19 to 83 ...  read more

20160506-29
Development of a novel device and analysis method for characterising electron beams for welding applications
Aman Kaur, Colin Ribton, Wamadeva Balachandran

Cite as:

The quality of electron beam welds depends upon a number of parameters like accelerating voltage, beam current, focus settings, vacuum level, working distance and welding speed. Even if these parameters are tightly controlled, ...  read more

20160506-20
Design of electron guns using a bespoke genetic algorithm
Colin Ribton, Sofia del Pozo, Wamadeva Balachandran, David Ryan Smith

Cite as:

Electron beams are used in many different industrial, medical and scientific applications. Each area has many specific requirements that can only be met with bespoke gun designs producing beams with the required intensity, ...  read more