ALD MCP 116 Life Test Update MCP 116 - 20µm pore, ANL functionalized, R = 31 MΩ Single plate in phosphor screen detector on life test system Pre-scrub imaging vs. voltage Baked at 145°C for 48 hours (peak pressure 1e-4 torr, final pressure 4e-7 torr) Post-bake imaging and “gain” vs. voltage Start scrub 9/10/10, extracting ~140 days (~4.6 C/cm2) Slow gain decrease (after initial drop and rise) continues Intermediate imaging and gain vs. voltage at 0.43 C/cm2, 1.74 C/cm2, 3.05 C/cm2, and 4.07 C/cm2. Video of flaring hot spots at 4.6 C/cm2. 25 January 2011 J. McPhate – MCP 116 Life Test Update

Relative Gain vs. Extracted Charge 25 January 2011 J. McPhate – MCP 116 Life Test Update

Photocurrent vs. Voltage (same as 1/11/11) Little change in curves over last three measurements 25 January 2011 J. McPhate – MCP 116 Life Test Update

J. McPhate – MCP 116 Life Test Update Background Hot Spots VMCP = -1400V VScreen = +3000V UV light off 30 second exposure (deep) New hot spots continue to develop Hot spot activity seems to be sporadic, with some blinking on and off, others changing brightness Hot spots largely associated with substrate gaps and voids. Flaring of hot spots is the cause of spiky current observed 25 January 2011 J. McPhate – MCP 116 Life Test Update

J. McPhate – MCP 116 Life Test Update Spiky Scrub Current 1µA Captured a scope traces of a smaller spikes, like one of these. Video captured of flaring hotspots when active like this. 0 µA 25 January 2011 J. McPhate – MCP 116 Life Test Update

J. McPhate – MCP 116 Life Test Update Current Transients Scope snaps of small spikes captured. Correlation between chart recorder behavior and scope traces seems to indicate larger spikes are simply more sustained behavior – rather than higher current. Imaging and video acquired during significant outburst. See associated video files on the blog. 25 January 2011 J. McPhate – MCP 116 Life Test Update

Scope Trace from Small Spike 25 January 2011 J. McPhate – MCP 116 Life Test Update

Image During Outburst Mode Previously unseen hot spot on a multi-fiber boundary Very erratic Very bright compared to other hot spots and the rest of the image Video captured of this hot spot flaring Destroyed phosphor screen during a particularly strong outbursts (caught on video). 25 January 2011 J. McPhate – MCP 116 Life Test Update

Phosphor Damage from Hot Spot Outburst 25 January 2011 J. McPhate – MCP 116 Life Test Update