The ion source is actually pointing away from the target. Would you mind if i sent you a simple diagram to better illustrate? I'm not sure if I can explain it well enough.
I apologize if this seems ignorant, but I am at a loss and I need some assistance. I recently built a small vacuum PVD system (Ion source, argon, target material, substrate cradle, etc.) and was showing it to a colleague when it was noticed that my system was unbiased. It actually didn't occur...