1. Jarred Alexander Young February 12, 2013

2.  Beam Testing  LabView programs successfully upgraded  Results acquired from differing anode voltages ▪ Shows energy changes across different voltages  Technical Difficulties  Filament supply broke down again; two weeks for shipping and repair  Electron conduction problem ▪ Recently repaired

3.  Performed analysis across two settings to see if peak of distribution could be moved  Third setting from previous data (12/20/2012)  Looked at moving filter effects on picoammeter data  Results gathered at similar beam currents QuantitySetting 1Setting 2Setting 3 Anode Voltage 179 V190 V218 V Discharge Voltage 115 V126 V154 V Accel Grid Voltage -182 V *Voltages relative to ground

8.  Data shows that the energy peak is moving as expected  As anode voltage increases, peak moves towards the right of the voltage spectrum  Estimated energy level range: ~100-300 eV Test # Anode Current (mA) Discharge Current (mA) Filament Current (A) Accel Grid Current (mA) Energy Peak (eV) 61.6879.74.314-1.53175.75 81.6972.54.371-1.62184.84 11 (from12/20).4114.224.051-.24236.36 (?)

9.  Designed to mount on the front of the RPA  Allows for:  Testing of 3 x 7 mm material samples ▪ Includes silicon coupons from ISU  Monitoring of energy level during beam exposure Mount points

10.  Finish beam energy testing and compile matrix of energy levels  Begin coupon testing at different beam energy levels