Baseline RTML in TDR ( For discussion ) S.Kuroda ( KEK )

Beam Parameters

Layout

Return Line ( ELTL/PLTL ) Following the earth’s curvature in ML tunnel V correctors in each Q V dispersion matching by v correctors at both ends The curved orbit is introduced as ‘design’ or orbit distortion?

Diagnostics Cavity BPM Laser Wire for emittance measurement New definition of RTML: BC is not included. Diagnostics and correction section upstream of BC1 is included in RTML? Polarization measurement?

Beam Physics Issues Stray Field – Tolerance ( K.Kubo ) 2nT for orbit jitter of 0.2  y – This can be corrected by fast feed-forward Higher for emittance growth From what the criteria 0.2  y comes?. Criteria for emittance growth?

Stray Field ( Measurement ) N.Solyak 2011 Is it OK after all?

Beam Physics Issues (2) Emittance Preservation ( A. Latina )

Other Beam Physics Issues in TDR ISR Vertical emittance growth is negligible Beam-Ion instability ( L.Wang, et al ) – < 2  Pa Halo Formation from Scattering( S.M.Seletskiy ) – 2  Pa  2e-6 of beam intensity < tolerance of 1e-5 Space-Charge Effect – Incoherent space charge tune shift is O(0.15) in v – To be studied

Back Up

K.Kubo