V. Kashikhin for ILC Magnet Group May 23, 2006

1. Report on e+ Transport Line Magnets V. Kashikhin for ILC Magnet Group May 23, 2006 FNAL Workshop, May 23-24

2. e+ Transport Lines 18700 m ? FNAL Workshop, May 23-24

3. e+ Transport Line Magnet Specs Y. Batygin, V. Bharadwaj, Y. Nosochkov, J.C. Sheppard, M. D. Woodley, F. Zhou Rev. 1: May 18, 2006 Table 1 lists the magnet requirements for the ILC positron system optics. The id is the minimum diameter for the solenoids. In the case of quardupoles, dipoles, and sextupoles a 2 mm vacuum chamber wall thickness is assumed. Alignment tolerances: 300 microns, absolute, transverse; field quality: 1% sum over allowed harmonics at 2 cm radius; PS tolerance: 10-3 dI/I. Dipole corrector pair for each quadrupole, strength ~50 g-m. BPM for each quadrupole • for quadrupoles; Bpole_tip for dipoles, sextupoles, septa, and kickers; and Bz for solenoids • Effective lengths are suggested; the integrated strengths are important • MPS beam abort, 50 mradian kick per kicker, 0.75 mrad total kick, same as BDS kickers. • MPS beam abort, 4.75 mrad per septum, 28.5 mrad total kick. • 7 m FD quadrupole spacing • 12.3 m FD quadrupole spacing • Quantity includes 2 primary and 1 keep alive target capture regions • 125 MeV e+/e- separator/target bypass optics, includes 2 primary and 1 keep alive target capture regions • 1.6 m FD quadrupole spacing • Matching • In cryostat • 1.95 m FD quadrupole spacing • 6.9 m FD quadrupole spacing • 12.3 m FD quadrupole spacing • Transport line magnets: 13.5 km @ 400 MeV; 5.2 km @ 5 GeV • 8.4 m @ 400 MeV and 105 m @ 5 GeV FD quadrupole spacing • 4.4 m FD quadrupole spacing • Matching • References • http://www-project.slac.stanford.edu/ilc/acceldev/eplus/flies/Beamline%20Layout/ILC%20Positron%20Source%20Beam%20Optics.doc • http://www-project.slac.stanford.edu/ilc/acceldev/eplus/Documents/2006-05-18-Batygin-LTR.pdf FNAL Workshop, May 23-24

4. e+ Transport Line Magnet Parameters Total 2275 FNAL Workshop, May 23-24

5. 160 mm Bore 1662 Quadrupoles (1) Integrated field non-linearity at 20 mm radius 0.6% Flux density in the iron core. Pole end field < 1.47 T Field along Z-axis at 20 mm radius Field at 20 mm radius in central section FNAL Workshop, May 23-24

6. 160 mm Bore 1662 Quadrupoles (2) Cooling pipes Laminated low carbon steel iron core (with pins or welded plates) Whole magnet cross-section stamping Four coils assembled with yoke and vacuum impregnated G10 spacers fix coils position Water cooling pipes attached to the yoke outer surface or each coil FNAL Workshop, May 23-24

7. Strings of Large bore quadrupoles Power Supply Quadrupoles Power supply 15 kW Voltage 220 V Current 62 A Current stability < 0.1% Power supplies number 400 Mev Line 33 5 GeV Line 3 Total PS 33 FNAL Workshop, May 23-24

8. Summary • All magnets are feasible • Some quadrupole effective length should be increased in 4 times • Large bore 1662 quadrupoles are 73 % of all magnets quantity, conceptually designed and will be correctly cost estimated • Integrated with quadrupole dipole correctors, strength 50 G-m ?, field 0.011 T , 1400 ampere-turns ? • Large bore solenoids heat loads ?, NC or SC? FNAL Workshop, May 23-24