Evaluating Damping Ring Lattice Designs in Preparation
for Snowmass and an ILC Baseline Configuration Document

Simulations performed by Jeremy Urban using programs based on the Bmad subroutine library. Using the lattices found at: www.desy.de/~awolski/ILCDR/Lattices.htm

View all results for a given lattice here:

Parameters Megatable

BRU DAS MCH OCS OTW PPA TESLA
Length km 6.333 17.014 15.935 6.114 3.224 2.824 17.001
Energy GeV 3.740 5.000 5.000 5.066 5.000 5.000 5.000
Arc Cell FODO PI FODO TME TME PI TME
Horizontal Tune 65.783 83.730 75.783 50.840 45.164 47.810 76.310
Vertical Tune 66.413 83.650 76.413 40.800 24.157 47.680 41.180
Synchrotron Tune -0.128 -0.071 -0.169 -0.036 -0.044 -0.027 -0.075
Natural Chromaticity X -78.77 -105.28 -89.31 -64.98 -88.10 -62.93 -125.53
Natural Chromaticity Y -86.86 -105.04 -94.80 -53.40 -74.20 -60.40 -59.84
Corrected Chromaticity X -0.12 0.73 0.64 0.60 -1.32 0.16 -0.36
Corrected Chromaticity Y -0.21 0.86 0.04 0.47 0.64 0.20 2.81
Natural Energy Spread 10^-3 0.974 1.298 1.302 1.293 1.363 1.272 1.296
Bunch Length mm 9.22 5.69 9.35 5.66 5.77 5.90 5.77
Momentum Compaction 10^-4 11.92 1.14 4.74 1.62 3.62 2.83 1.22
RADIATION DAMPING PARAMETERS
BRU DAS MCH OCS OTW PPA TESLA
Energy Loss Per Turn MeV 6.194 21.037 19.786 9.331 8.858 4.702 20.367
Damping Time X ms 25.5 27.0 26.9 22.1 12.1 20.0 27.8
Damping Time Z ms 12.8 13.5 13.4 11.1 6.1 10.0 13.9
Damping Time X turns 1,208 475 505 1,086 1,130 2,127 491
Damping Time Z turns 604 238 253 543 564 1,063 245
WIGGLER PARAMETERS
BRU DAS MCH OCS OTW PPA TESLA
Total Wiggler Length m 360.0 403.2 360.0 160.0 160.0 86.4 385.2
Wiggler Period cm 40 40 40 40 40 40 40
Wiggler Peak Field T 1.20 1.67 1.60 1.60 1.80 1.67 1.67
Single Wiggler Length m 2.0 3.6 2.0 2.0 2.0 3.6 3.6
Ave Beta X,Y in Wigglers m 9.2 13.9 8.7, 8.6 9.2, 13.9 4.5, 5.6 8.8, 8.7 4.8, 9.7
Inj Sigma X,Y in Wigglers mm 3.6, 4.3 3.0, 3.0 3.1, 3.8 2.1, 2.4 3.0, 3.0 2.2, 3.2
INJECTION PARAMETERS
BRU DAS MCH OCS OTW PPA TESLA
Injection Point ele # 0 0 0 0 0 0 0
Beta X,Y m 7.50, 13.00 24.13, 3.36 7.50, 13.00 20.75, 52.49 35.10, 15.78 21.34, 4.48 15.37, 8.60
Alpha X,Y .00, .00 .00, .00 .00, .00 .0003, -.002 .002, .0001 .00, .00 -.03, .00
Eta X,Y m 0.00, 0.00 0.00, 0.00 0.00, 0.00 0.00, 0.00 0.50, 0.00 0.00, 0.00 0.00, 0.00
Emittance X,Y m*rad 0.01 0.01 0.01 0.01 0.01 0.01 0.01
Beam Size X,Y mm 3.20, 4.22 4.97, 1.85 2.77, 3.65 4.58, 7.28 5.99, 4.02 4.67,2.14 3.96, 2.96

Created May 24, 2005
Modified August 15, 2005