Beam Production Optimal Outcome:
To develop the
advanced methods and surfaces needed for next-generation SRF cavities that enable game-changing reduction of cooling power, higher temperature operation, and higher accelerating fields for lower cryogenic system costs, energy sustainability, and simpler refrigeration.
Beam Production Roadmap.
Download PDF here.
Objective 1: Develop photocathodes for high peak-intensity beam generation with < 5 meV Mean Transverse Energy
Deliverable: A photocathode with 20 meV MTE at operational laser fluences ( to be completed by Fall 2024).
Deliverable: A photocathode with 5 meV MTE at operational fluences (to be completed by Fall 2026)
Objective 2: Design materials for long-lived cathodes in extreme electric field and high average current
Deliverable: Develop highly robust protective coatings or new materials that extend the photocathode lifetimes with little degradation in either QE or MTE. (to be completed by Fall 2025).
Objective 3 Approach fundamental brightness limits with nanostructured photoemitters :
Deliverable: An electron source with normalized transverse mittances approaching the fundamental limit of 0.2 pm set by the uncertainty principle for single electron per bunch beams (to be completed by Fall 2026).
Deliverable: Use nano-structure arrays to deliver pm-emittances for higher charge per bunch. (to be completed by Fall 2026).