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LCLS-II Klystron Configuration and Energy Challenges Overview

The LCLS-II facility is structured similarly to LCLS-I but features five fewer stations, contributing to a streamlined design. Key challenges include missing accelerator structures in levels 15-2, 14-2, and 14-4 as well as extraction from levels 20-5 and 19-7. Notably, restoring Girder 11-3 poses significant difficulties not included in cost estimates. The current design energy is projected to be under 13.5 GeV, incorporating reasonable repair margins, with a downgraded costed design reducing energy by an additional 200 MeV.

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LCLS-II Klystron Configuration and Energy Challenges Overview

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  1. LCLS-II Energy Overhead Tor Raubenheimer

  2. Klystron Configuration • LCLS-II similar to LCLS-I except shorter (5 fewer 5 stations) • Extraction from 20-5, missing 19-7 and missing accelerator structures in 15-2, 14-2, 14-4 and 11-3 • Girder 11-3 will be challenging to restore fully – not in cost estimates Accelerator and Detector PI Meeting Aug 22-23, 2011

  3. Existing E-NoLoads

  4. LCLS-II Design Energy • Assuming reasonable repair margin, design energy less than 13.5 GeV including11-3 – costed design is down another 200 MeV

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