1 / 9

ALD MCP 116 Life Test Update

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 )

stefan
Download Presentation

ALD MCP 116 Life Test Update

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. 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. J. McPhate – MCP 116 Life Test Update

  2. Relative Gain vs. Extracted Charge J. McPhate – MCP 116 Life Test Update

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

  4. 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 J. McPhate – MCP 116 Life Test Update

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

  6. 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. J. McPhate – MCP 116 Life Test Update

  7. Scope Trace from Small Spike J. McPhate – MCP 116 Life Test Update

  8. 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). J. McPhate – MCP 116 Life Test Update

  9. Phosphor Damagefrom Hot Spot Outburst J. McPhate – MCP 116 Life Test Update

More Related