1. A.Seryi, Oct. 26, 2005 1 BDS comparison and positron source A.Seryi October 26, 2005 Discussion of BDS and positron source is given in [1] “Comment on Decision 8: Positron Source Type” by Tom Himel (editor), Nan Phinney, Tor Raubenheimer, and Andrei Seryi. The present file does not repeat the arguments which were already given in [1] and intended for illustration to several detailed points.

2. A.Seryi, Oct. 26, 2005 2 Sequence in TDR design: linac, undulator, switchyard and arc bends to offset beam from target, magnetic energy spoiler, energy collimation, beta-collimation & diagnostics, final focus None of BDS systems are shared between 1 st and 2 nd IR MES beamline may not need delicate instrumentation sensitive to radiations and requiring frequent handling

3. A.Seryi, Oct. 26, 2005 3 Shared diagnostics with laser wires and skew correction In baseline design, the sequence is: shared diagnostics with laser wires and skew corrections, switchyard, polarimeter, beta-collimation, energy collimation, final focus The diagnostics region has challenging laser wire instrumentations and need to have comfortable environment for operation and maintenance

4. A.Seryi, Oct. 26, 2005 4 to IR2 to IR1 to dump skew & ε ILC2005 Beam Switchyard

5. A.Seryi, Oct. 26, 2005 5 Spare slides Details of layout and optics of baseline

6. A.Seryi, Oct. 26, 2005 6 20 mrad (L* = 3.51 m) dump lines IR1 20 mrad IR2 2 mrad 20 mrad ILC FF9 (x 4) NLC BSY dump lines 11 mrad NLC-style Big Bends IP separation: 138 m (Z), 21 m (X) e-e+ 2 mrad (L* = 3.51 m) dump lines

7. A.Seryi, Oct. 26, 2005 7 Includes: energy spectrometer chicane spoilers absorbers muon shields photon masks PCs stoppers instrumentation feedback ILCFF9 (survivable spoilers)

8. A.Seryi, Oct. 26, 2005 8 Yuri-style (NLC) 11 mrad Big Bend & polarimeter chicane ISR:

9. A.Seryi, Oct. 26, 2005 9 to IR2 to IR1 to dump skew & ε ILC2005 Beam Switchyard