Single 20µm MCP Phosphor Tests 7/27/2010

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Presentation transcript:

Single 20µm MCP Phosphor Tests 7/27/2010 Incom substrates, 33mm diameter 20µm pores, 8 deg bias, 60:1 L/D, 65% OAR Arradiance processed for resistive and emissive layer application + electrode All substrates with notches Resistances from 300 MΩ to 1GΩ Gain at 1000v from 15,000 to 30,000

Arradiance processed MCPs, 20µm All have notches – From Arradiance in April 2010 UV image of a notched 20µm 65% OAR, 8° bias, UV image of a notched 20µm 65% OAR, 8° bias, 60:1 L/D, finished MCP, after ALD coating. 800v. 60:1 L/D, finished MCP, after ALD coating. 1200v. Notch

Arradiance processed MCPs, 20µm All have notches – From Arradiance in April 2010 UV image of a notched 20µm 65% OAR, 8° bias, UV image of a notched 20µm 65% OAR, 8° bias, 60:1 L/D, finished MCP, after ALD coating. 900v. 60:1 L/D, finished MCP, after ALD coating. 1200v. Note the the triple point voids, and distorted channels at the multifiber boundaries. cause gain loss, which is only improved with higher voltage. All MCPs have straight line delineations across the Multifibers corresponding with the visual inspections. Short exposures at the higher gains show the effects of single event flashes. See movie.

Arradiance processed MCPs, 40µm Comparisons Arradiance processed MCPs, 40µm All have notches – March 2010 UV image of a notched 40µm 65% OAR, 8° bias, UV image of a notched 40µm 65% OAR, 8° bias, 60:1 L/D, finished MCP after ALD coating. 700v. 60:1 L/D, finished MCP, after ALD coating. 1000v. From the first batch of ALD coated 40µm MCPs. Pore crushing near the multifiber boundaries causes a lowering of the gain. The gain depression can only be partially resolved by increasing the applied voltage, which then improves the image unifromity.

Incom MCP 20µm Substrates Observations The Incom 20µm substrates, with notches are different than the 40µm substrates There are straight line image features within multifibers, stacking of different fibers?? The triple point voids, and distorted channels at the multifiber boundaries, cause gain reductions. The gain reductions need higher voltages to flatten out the images. The substrate quality needs to improve to avoid significant gain / image nonlinearities.