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LBNL Photocathodes: Production, Characterization, and Applications for Synchrotron Radiation Techniques

Explore the production and characterization of LBNL photocathodes optimized for various light sources, including UV, multi-photon IR, and green lasers. Discover their unique properties such as plasmonic behavior and explore their applications in synchrotron radiation techniques like x-ray diffraction and elemental analysis.

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LBNL Photocathodes: Production, Characterization, and Applications for Synchrotron Radiation Techniques

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  1. LBNL Photocathodes • Metals • Copper, Silver • UV and multi-photon IR • Semiconductors • - Alkali Antimonides • - optimized for 532 nm light • - Plasmonic • - Au, Ag, Al • - optimized for multi-photon IR and green

  2. LBNL Photocathodes • Production and Characterization - laser based angle resolved photoemission - work function, LEED, Auger, angle / pol dependent yield, ion cleaning, 1200 – 80 K - MBE antimonide deposition / characterization - Sb, Cs, K, Al deposition - laser plasma-based yield + reflectivity

  3. LBNL Photocathodes - PEEM - 15 nm spatial resolution, 50 micron field - UV spatially resolved yield (+ x-rays) - sample prep + transfer Synchrotron Radiation Techniques (we developed and use at ALS) - sub-micron x-ray Laue diffraction (grain orientation / strain) - SAXS-WAXS (thin film growth) - micro XRF / XAS (elemental and chemical state, 2 micron resolution) + SEM, FIB-TEM, AFM, Molecular Foundry (for plasmonic nanostructures)

  4. LBNL Photocathodes Gun Test Facility INFN – FLASH cathode load lock / transfer system

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