Six wiggler lattice

Lattice with 6 wigglers all in the east in configuration anticipated after Spring 2003 shutdown. There will be two adjacent 7 pole wigglers between Q13E and Q14E with opposite polarity. There will be an 8 pole wiggler between Q14E and Q15E, and 3 8 pole wigglers between Q18E and Q19E. Optics are designed so that phase advance from IP to L3 is half of total and so that alpha and etap are zero at L0 and L3. The IR superconducting quads and skew quads as well as Q3 and Q4 are east west symmetric.

March, 18, 2003 Lattice: ~dlr/bmad_devel/6wigs/bmad_6wigs_3_18_03.lat

Replace layout, ~dlr/bmad_devel/6wigs/cesrc_6wig_mod_layout.bmad with ~dlr/bmad_devel/layout/cesr_c1_layout.bmad. The old layout had missing bend in both east and west. The new layout corresponds to geometry that scott will use to survey dipoles, quads, and wigglers in east. Also, in the previous, the chess wigglers had been inadvertently left on. Use all quads east and west independently in alternating groups to reoptimize.

• lattice constraints
• lattice
• Optical parameters and orbits
  • table
  • Orbit, eta, beta plot png and ps
  • Tune scan png and ps and initialization
  • Tune scan of bunch 1, train 1 positrons vs 9X5X0.0001mA/bunch electron png and ps and initialization Track for only 100 turns to check that splits for lrbbi are ok 4/4/03
  • Tune scan of bunch 1, train 1 positrons vs 9X5X0.0001mA/bunch electron png and ps and initialization Track for 1000 turns. Should be the same as scan with no parasitic crossings. 4/7/03.
  • Tune scan of bunch 1, train 1 positrons vs 9X4X1mA/bunch electron png and ps and initialization . 1mA. Starting x,y,z = 0.0022, 5.e-6,3.e-3, 4/7/03.
  • Tune scan of bunch 1, train 1 positrons vs 9X4X1mA/bunch electron png and ps and initialization . 1mA. Starting x,y,z = 0.0022, 5e-6, 6e-4, 4/10/03.
  • Tune scan of bunch 1, train 1 positrons vs 9X4X0mA/bunch electron png and ps and initialization . Zero current. Starting x,y,z = 0.0022, 5e-6,3e-3, 4/10/03.
  • Dynamic aperture tracking png and ps Qx=0.54, Qy=0.615, Qs=-0.1
  • Dynamic aperture tracking (another tune) png and ps Qx=0.54, Qy=0.625, Qs=-0.1
  • Dynamic aperture tracking of bunch 1 positrons with 9X5X2ma/bunch of electrons png and ps and initialization Qx=0.54, Qy=0.6155, Qs=-0.1

• Parameters for beam-beam simulation including radiation integrals, damping decrement, etc.

Note: In symplectic integration tracking prior to 5/5/03 (above), wiggler polarity switch was not functioning and results correspond to polarity 1 for all. In symplectic integration tracking after 5/5/03 (below), polarity switch is OK.

Comparison of 3 tracking methods: bmad_6wigs_3_18_03.lat, Qx=0.54, Qy=0.6155, Qs=-0.1