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ILC-TRC logo Table 1.1
Linear Colliders: Overall and Final Focus Parameters - 500 GeV (c.m.)
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8/98
TRC
12/95
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10/96
TRC
12/95
Updated*
9/99
TRC
12/95
TRC
12/95
Updated*
12/98
TRC
12/95
Updated*
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TRC
12/95
Updated*
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Initial energy (c.m.) (GeV) 500 500 500 500 500 500 500 500 Initial energy (c.m.) (GeV)
RF frequency of main linac (GHz) 1.3 3 5.7 11.4 11.4 11.4 14 30 RF frequency of main linac (GHz)
equation 2.6 16.2 2.2 3.16 7.3 5.02 5.1 5.3 5.1(4.2) 12.3 11.9 0.7-3.4 7.8 equation
equation 6.1 30 3.75 5.3 6.1 7.18 5.2 7.1 6.54(5.45) 9.3 9.7 1.07-4.8 14.2 equation
Linac repetition rate (Hz) 10 5 50 100 150 180 120(100) 300 2530-1210 200 Linac repetition rate (Hz)
equation 5.15 2 2.9 1.1 1 1.11 .63 .65 .95 20 .8 .4 equation
No. of bunches/pulse 800 2820 125 333 72 85 90 95 1 1-10 154 No. of bunches/pulse
Bunch separation (nsec) 1000 337 16 6 2.8 1.4 2.8 2.8 - .67 Bunch separation (nsec)
Beam power/beam (MW) 16.5 11.3 7.26 7.25 2.9 3.07 3.2 4.2 4.5(3.7) 2.4 .8-3.9 4.9 Beam power/beam (MW)
Damping ring energy (GeV) 4 3.2 3.15 2 1.98 2 2 1.98 3 2.15 1.98 Damping ring energy (GeV)
Unloaded/loadedequation(MV/m) 25/25 21.7/21.7 21/17 40/32 44/34 73/58 50/37 72.3/55 100/91 80/78 172/150 Unloaded/loadedequation(MV/m)
Total two-linac length (km) 29 30 33 32 18.8 16 10.4 15.6 10.5 7 8.8 4.6 Total two-linac length (km)
Total beam delivery length (km) 3 2.5 3 3.6 3.6 4.4 NA 3 2.4 10 (3 TeV) Total beam delivery length (km)
equation 20/1 10/.03 10/.5 5/.25 3.3/.05 3.3/.05 5/.05 4.5/0.1 20/.08 3/.15 2/.02 equation
equation 25/2 15/.4 22/.8 11/.45 10/.1 15/.2 10/.1 10/.1 12/0.12 100/.1 10/.18 10/.15 equation
equation 1000/64 553/5 670/28 335/15.1 260/3 318/4.3 260/3.1 320/3.2 330/4.9 2000/4 247/7.4 202/2.5 equation
equation 1000 400 500 300 120 200 90 100 120 750 200 30 equation
Crossing Angle at IP (mrad) 0 0 3 6 6 8 6.1 20 20(6) 6 1 10 Crossing Angle at IP (mrad)
equation .56/8.7 .3/33 .36/8.5 .32/7.1 .2/18 .25/17.9 .096/8.3 .07/7.3 0.12/7.9 .4/215 .29/9.8 .03/2.7 equation
equation 2.3 1.8 1.8 1.68 1.4 1.7 1.4 1.34 1.36 2 0.82 1.42 1.81 equation
Upsilon sub-zero .02 .02 .037 .14 .21 .12 .089 .11 .059 .07 .289 Upsilon sub-zero
Upsilon effective .03 .03 .042 .144 .12 .09 .11 .074 .075 .291 Upsilon effective
equation 3.3 2.8 3.2 2.8 6.5 4.1 3.5 2.4 3.7 13.3 10.0 3.6 4.4 equation
equation 2.7 2.0 1.9 1.4 1.5 1.5 .94 .8 1.1 5 4.7 1.35 .7 equation
equation 19 31 8.8 7.1 10.3 20.1 2.9 2 9.8 1700 1219 3 4.4 equation
equation .17 .13 .1 .04 .23 .13 .05 .03 .07 45.9 11 .05 .05 equation
equation .16 .3 .14 .1 .66 .37 .14 .08 .2 56.4 28 .10 .24 equation

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information for Table 1.1.
TRC
12/95
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12/95
Updated*
10/96
TRC
12/95
Updated*
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TRC
12/95
TRC
12/95
Updated*
12/98
TRC
12/95
Updated*
10/96
TRC
12/95
Updated*
9/99

*If a number does not appear in the updated column, this means that the number in the TRC column still holds.

**Numbers in ( ) under JLC/NLC correspond to 100 Hz repetition rate; numbers in ( ) under CLIC correspond to a
20% dilution in sigma_sub_y and 5% in sigma_sub_x.

dagger For the sake of uniformity, the nominal luminosity is simply defined as equation times the number of crossings per second, and in all cases assumes head-on collisions, no hour-glass effect and no pinch. The actual luminosity incorporates all these effects, including crossing angle where applicable. NLC calculations assume crab-crossing.

doubledagger The loaded gradient includes the effect of single-bunch (all modes) and multibunch beam loading, assuming that the bunches ride on crest. Beam loading is based on bunch charges in the linacs, which are slightly higher than at the IP.

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