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LCLS-II UXT Tunnel Length Considerations. J. Welch, J. Wu, H-D. Nuhn, Z. Huang, M. Rowen, 10-5-11. CD1 Layout. BTH (Research Yard). UXT 304 m. EH2. Tunnel Length and Scenarios. Limitations of Self-Seeding Options. Photon energy tunability
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LCLS-II UXTTunnel Length Considerations J. Welch, J. Wu, H-D. Nuhn, Z. Huang, M. Rowen, 10-5-11
CD1 Layout BTH (Research Yard) UXT 304 m EH2
Limitations of Self-Seeding Options • Photon energy tunability • Not clear if S-S photon energy is flexible or if a different crystal is needed for different photon energies. • Pulse energy • single crystal scheme requires short, low charge bunches which may not generate much pulse energy. 1 TW x 1 fs = 1 mJ