|Dec1-10, 12:58 AM||#1|
estimation of reflected electron beam power falling on a target
I need to calculate an estimate of the reflected electron beam power in the form of back scattered electrons and secondary electron emissions from a tungsten/Graphite target. The Electron source is a 25kV source with operated at a power of around 25kW. The tungsten. graphite blocks are 50mm x 30mm and is 15mm thick. the heat produced from the surface is extracted by a water cooling system which runs through the tungsten block, below the 15mm thick layer of tungsten.
How do i approach such a problem? how do you calculate the total energy absorbed in the target, the amount reflected?
|Dec6-10, 03:46 AM||#2|
Look at www.mc-set.com, where you can download a program to calculate BS electrons from an electron beam, such as the one in a scanning electron microscope.
From that, you can extend to your particular case.
|Dec7-10, 12:04 PM||#3|
At 1 amp on the target, the backscattered electrons may cause a significant space charge problem. This would lead to defocusing of the incident beam.
|backscattered, beam, electron, reflected power|
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