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First Preconditioning Test of New Batch of 33mm 20µm Pore MCPs

First Preconditioning Test of New Batch of 33mm 20µm Pore MCPs. ANL MCPs 164 and 163, 20µm, 60:1, 8° bias. INCOM serial # s , 11863-99, 11863-95 Resistances 159MΩ, 138MΩ ( NiCr over) XDL detector with MCPs gapped by 0.001” spacer. Completed 350°C bake, with RGA scans.

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First Preconditioning Test of New Batch of 33mm 20µm Pore MCPs

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  1. First Preconditioning Test of New Batch of 33mm 20µm Pore MCPs • ANL MCPs 164 and 163, 20µm, 60:1, 8° bias. • INCOM serial #s, 11863-99, 11863-95 • Resistances 159MΩ, 138MΩ (NiCr over) • XDL detector with MCPs gapped by 0.001” spacer. • Completed 350°C bake, with RGA scans. • Scrub in progress, with RGA scans. • Have gone from 1µA to 2µA, now 3µA >0.65 C cm-2 extracted.

  2. MCP 164-163 Scrub Record Up to 3µA Up to 2µA 1µA Minimal gain drop for 1µA to 0.06 C cm-2, some small H2 outgas (10-10Torr). Full functional test showed no substantive performance changes except for slightly higher background. Faster drop @ 2µA but stablized quickly with some H2 outgas (4 x 10-10Torr). At 3µA since then, with small drop then recovery to >100% gain – leveling off now @0.65 C Cm-2. 164-163 Scrub @ 3 x 105 gain, 700v per MCP

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