View source for GBS - March 8, 2019


==Questions to Answer and Plots to Make==
;Ion/Secondary Production
*Is production rate proportional to (current, pressure)?  does it scale with ionization cross-section beam energy?
*Is trap density proportional to production rate, i.e. scale w/ (current, pressure, time)?  similarly, for beam energy?

;Magnetic Trap Threshold
*Does trap density depend upon the magnetized solenoid current? if yes, what is the dependence on current?
*Does the min magnetizing current to sustain a trap, depend on the max magnetizing current? or is it a fixed threshold, independent of beam energy, current, pressure, time, etc?

;Role of Anode Bias
*Is the anode bias essential for magnetic trapping of ions?
*... or rather, what impact does the anode bias have on the trap efficiency or trap density?

;Role of the Electron Beam
*Must the primary electron beam be run?   if FE is present, is this sufficient?  in lack of photo- or FE- beam, is there any notable ion production?
*Can trap density co-exist w/ electron beam?   is there a beam clearing effect, i.e. can trap density remain only when beam is "OFF"
*...if yes, then what is this limit, pA, nA, is FE enough, or if NO is there a dependence on beam current?

* Diagnostics and Measurements at GTS [[media:190308_GTS_Plan.pdf]]