Types of electron beam welding gun, Mechanical Engineering

TYPES OF ELECTRON BEAM WELDING GUN

 

Diode (Cathode - anode) Gun: In this gun, the beam shaping electrode and the emitter are both at the same electrical potentials. These are, of simple construction but the only way to control beam current is by varying either the high voltage or filament temperature.

Triode (Cathode - grid - anode) Gun: The most widely used gun is the thermionic triode gun. The beam shaping grid can be biased to a slightly more negative value than the emitter in order to control beam current flow. In this case, the emitter alone is called cathode, focused with a spot diameter of less than 0.005 inches. Both of the gun types discussed above have directly heated filaments or cathodes, that is heated by passing an alternating or direct current (AC or DC) through it. Another method of cathode heating is indirect heating of these filaments by bombardment from another cathode known as the primary cathode.

Posted Date: 9/17/2012 6:57:16 AM | Location : United States







Related Discussions:- Types of electron beam welding gun, Assignment Help, Ask Question on Types of electron beam welding gun, Get Answer, Expert's Help, Types of electron beam welding gun Discussions

Write discussion on Types of electron beam welding gun
Your posts are moderated
Related Questions
Kinetics of a Particle: We have seen the effect of forces on a particle. The laws of motion for a particle are extended to include a system of particles or a rigid body. It is

Centrifugal air compressor: A centrifugal air compressor delivers 15Kg of air per minute. The outlet and inlet conditions are At inlet: Velocity = 5m/sec, enthalpy = 5KJ


INTRODUCTIO : In Motorcycle Servicing, we studied about servicing of a motorcycle. Here, you will study about the detailed procedures for motorcycle service and maintenance. The s

Aircraft Characteristics For planning and designing airport facilities, it is necessary to be conversant with the following important characteristics: (a) speed (b) size

There are various refrigeration systems employing various methods. State any seven (7) refrigeration systems, mention the method(s) employed to attain low temperatures, and state a

WHAT IS CALGON CONDITIONIMG

Figure shows a Warren girder consisting of seven members each of 3 m length freely supported at its end points. The girder is loaded at B and C as given. Determine the forces in al

Q. Cold service insulation on pipe? Factory fabricated sectional pipe insulation shall be applied in staggered joint construction. On multiple layer construction, all joints sh

Jib crane Mechanism: Sol.: Jib crane is taken in use to raise heavy loads. A load W is lifted up by pulling the chain through pulley D as shown in the adjacent figure.