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Characterization Update

This update highlights the ongoing efforts to prepare for the GP review and conduct post-repair tests. It also discusses the findings of F contamination in the Gold and Al2O3 samples, as well as the XPS, UPS, and SEY results after Ar+ sputtering. Additionally, plans for analyzing ALD and Arradiance samples are outlined.

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Characterization Update

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  1. Characterization Update Slade Jokela, Igor Veryovkin, Alex Zinovev

  2. Past Week • Preparing for photocathode GP review • Post-repair tests • Gold • Al2O3 – Found F contamination (prior report)

  3. Gold • XPS after 30 minutes Ar+ sputtering

  4. Gold • UPS after 30 minutes Ar+ sputtering

  5. Gold • SEY after 30 minutes Ar+ sputtering

  6. Al2O3 • XPS of sample QP46a (F contamination)

  7. XPS of 10x MgO/W

  8. UPS of 10x MgO/W

  9. SEY of 10x MgO/W

  10. This Week • Continuing to prepare for GP review • Received new ALD samples • Samples are too large to fit into our system • 1 inch diameter maximum • Arradiance samples are still in the works • Will contact Kathy Harkay

  11. Near Future • Finalize multi-sample holder for XPS system • XPS, UPS, and SEY of our ALD-Group’s samples • Find trends related to thickness • XPS, UPS, and SEY of Arradiance samples • Compare to our ALD-Group’s samples and attempt to identify source of any differences

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