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Arradiance ALD/Incom MCP Scrub and Life Test

Arradiance ALD/Incom MCP Scrub and Life Test. Incom substrate 40µm pores, 8 deg bias, 40:1 L/D Sent to Arradiance for resistive and emissive layer application + electrode Resistance approx 750 MΩ in vacuum Arradiance tests show 50,000 gain @ 1000v Tested as a single MCP + Phosphor.

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Arradiance ALD/Incom MCP Scrub and Life Test

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  1. Arradiance ALD/Incom MCPScrub and Life Test • Incom substrate • 40µm pores, 8 deg bias, 40:1 L/D • Sent to Arradiance for resistive and emissive layer application + electrode • Resistance approx 750 MΩ in vacuum • Arradiance tests show 50,000 gain @ 1000v • Tested as a single MCP + Phosphor

  2. ArradianceALD/Incom MCP Test UV light 550v Bright scratch on phosphor 1000v background, no obvious hotspots other than phosphor defects

  3. ArradianceALD/Incom MCP Lifetest SSL-UCB Arradiance, Inc. 10 mm pore NO LEAD glass substrate, 40:1 L/D, Bias = 880V, Iout~0.4 pA/pore, gain under electron bombardment Tremsin - LAPD workshop 25mm 40µm 40:1 ALD MCP, UV scrub Starts at Bias = 700V, gain x1000, 0.6µA, change to 880v, 0.8µA at 0.03C/cm2 Note: no vacuum bake

  4. “Low” Gain Images Note that the camera used for post scrub imaging was much higheroptical resolution, so differences are exaggerated Pre-Scrub VMCP = 550V Post-Scrub VMCP = 700V

  5. Pre & Post Scrub Histograms at “low” gain Note that the camera used for post scrub imaging was much higheroptical resolution, so differences are exaggerated Pre-Scrub Cross-Section: VMCP = 550V Post-Scrub Cross-Section: VMCP = 700V

  6. “High” Gain Images Note that the defects are present before and after thescrub, most likely dust, and may have charged up topresent the bright rings only when light is turned on! Pre-Scrub VMCP = 900V Post-Scrub VMCP = 1100V

  7. Pre & Post Scrub Histograms at “high” gain Pre-Scrub Cross-Section: VMCP = 900V Post-Scrub Cross-Section: VMCP = 1100V

  8. Pre-Scrub Close-Up • 40µm pores visible • We can see the Hex boundary distortions are uneven • 800v MCP • 2900v screen Post scrub at 800v

  9. Post-Scrub Close-Up • 40µm pores still visible but are now narrow spots. • Hex boundary distortions are washed out • 1100v MCP • 2900v screen • Former dead spots now have bright halos at high gain

  10. Background Images No significant changes Pre-Scrub VMCP = 1000V Post-Scrub VMCP = 1100V

  11. Post-Scrub response at higher gain Modulation seems more related to applied voltage - not gain. VMCP = 600V VMCP = 700V VMCP = 800V VMCP = 900V VMCP = 1000V VMCP = 1100V

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