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High Energy Plume Impingement on Spacecraft Systems AFOSR Telecon. Jarred Alexander Young October 22, 2013. Current Events. Langmuir Probe testing Testing completed Post-processing underway Power Supply Basic design received
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High Energy Plume Impingement on Spacecraft SystemsAFOSR Telecon Jarred Alexander Young October 22, 2013
Current Events • Langmuir Probe testing • Testing completed • Post-processing underway • Power Supply • Basic design received • Checked ion source for possible arcing at higher voltage levels • Material Testing • Designed specimen holder for Al needles
Langmuir Probe Data • Post-processing underway on all data • Using Chen analysis programs • Parameters haven’t been found yet • Data may be representative of a shifted Maxwellian due to non-standard plasma environment
Langmuir Probe Data from NEXT Thruster array • Beam energy: ~1800 V • Beam Current: 3.52 A • Plasma Potentials: 1.5-3 V • Electron Temperature: ~0.6-1 eV • From: Foster, et al., Plasma Characteristics in the Plume of a NEXT Multi-Thruster Array (2006)
Langmuir Probe Data from SPPL-1 • Probe starts to attract electrons around ~190 V inside the ion beam • May be possible that this data represents a shifted Maxwellian due to low densities in the beam • Dominated by beam ion velocity
Future Work • Finish probe data post processing • Provide data to Burak • Material Experiments • Perform re-do of Aluminum experiments • Start on Mylar experiments • Looking into Solar cells and solar cell interconnectors