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Question calculating secondary electrons from electron source (using GRAS) 

Forum: Space Applications
Date: 30 Jul, 2014
From: Svetlana Shasharina <Svetlana Shasharina>

Hi everybody,

I need to calculate the flux of "extra" electrons produced by enviroment electrons in Europa environment. I have beed using GRAS to do my simulations and can calculate fluxes "to", "from" and "between" volumes but I cannot directly calculate the flux of the new electrons that might appear due to e radiation.

Questions: 1. Can I ignore the secondary electrons from electron sources and consider electrons produced by protons dominating (I know how to calculate secondary electrons when I have ion source:-)?

2. Can I estimate the secondary flux by subtracting "in" flux from the "from" flux? I understand that the logic is not flawless as some incident electrons might not leave the volume.

Thank you, Sveta

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