CLIC
PARAMETER LIST 3 TeV
500 GeV > 3 TeV evolution options here
Last update 15.04.10
Parameter 
Symbol 
2008 CLIC Note 764 (present parameters update after note in red) 
Unit 
Overall Parameters 



Center of mass energy 
E_{cm} 
3000 
GeV 
Main Linac RF Frequency 
f_{RF} 
11.994 
GHz 
Luminosity 
L 
5.9 
10^{34 }cm^{2 }s^{1} 
Luminosity (in 1% of energy) 
L_{99%} 
2 
10^{34 }cm^{2 }s^{1} 
Linac repetition rate 
f_{rep} 
50 
Hz 
No. of particles / bunch 
N_{b} 
3.72 
10^{9} 
No. of bunches / pulse 
k_{b} 
312 

Bunch separation 
Δt_{b} 
0.5 (6 periods) 
ns 
Bunch train length 
τ_{train} 
156 
ns 
Beam power / beam 
P_{b} 
14 
MW 
Unloaded / loaded gradient 
G_{unl/l} 
120
/
100 
MV/m 
Overall two linac length 
l_{linac} 
42.16 
km 
Total beam delivery length 
l_{BD} 
2
x
2.75 
km 
Proposed site length 
l_{tot} 
48.4 
km 
Total site AC power 
P_{tot} 
415 
MW 
Wall plug to main beam power efficiency 
η_{tot} 
7 
% 








Beam Delivery System + IP 



Total diagnostic section length 
l_{diag}  2 x 0.37  km 
Total collimation system length 
l_{coll} 
2 x 1.92 
km 
Total final Focus system length 
l_{FF} 
2 x 0.46 
km 
Input transverse horizontal
emittance (norm.) 
γε_{x} 
660 
nm rad 
Input transverse vertical emittance (norm.) 
γε_{y} 
20 
nm rad 
Nominal horizontal IP beta function 
β^{*}_{x} 
6.9 
mm 
Nominal vertical IP beta function 
β^{*}_{y} 
0.068 
mm 
Horizontal IP beam size before pinch 
σ^{*}_{x} 
45 
nm 
Vertical IP beam size before pinch 
σ^{*}_{y} 
1 
nm 
Bunch length 
σ_{s.inj} 
44 
um 
Initial RMS Energy spread 
σ^{*}_{DE/E} 
0.29 
% 
Total Energy spread 

% 

Crossing angle at IP 
θ_{C} 
20 
mrad 
Disruptions 
D_{x} / D_{y} 


Beamstrahlung parameter 
Υ_{0} 


Beamstrahlung mom. spread 
δ_{B} 
29 
% 
No. of photons / electron 
nγ 
2.2 

No. of pairs (p_{T}^{min}=20MeV/c, θ_{min}=0.2) 
N_{pairs} 
45 

No. of coherent pairs 
N_{coh} 
38 
10^{7} 
Hadronic events / crossing 
N_{hadron} 
2.7 

No. of jets (p_{T}^{min}=3.2 GeV/c) 
N_{jets} 


Peak luminosity 
L_{pk} 
5.9 
10^{34 }cm^{2 }s^{1} 
Luminosity (in 1% of energy) 
L_{99%} 
2.0 
10^{34 }cm^{2 }s^{1} 
Jitter
tolerance
(final
quadrupoles)
(for
2%
loss
in
L) 
0.14

0.18 
nm 







Main Linac 

CLIC G 

Fill factor 
F 
78.6 
% 
Overhead for energy fdbk & repair 
ovh_{rep} 
5 
% 
Overhead for offcrest operation 
ovh_{offcrest} 
5 
% 
Acceleration structure length (active/full) 
l_{struct} 
0.229 
m 
a/λ 
a/λ 
0.11 

Group velocity 
v_{g}/c 
1.66  0.83 
% 
Filling time / rise time 
t_{f} 
62.9/22.4 
ns 
RF > main beam efficiency 
η_{bRF} 
27.7 
% 
Prealignment acc. structure tolerance (1σ)  14 
μm  
Prealignment quadrupole tolerance (1σ)  17  μm  
Prealignment quadrupole BPM tolerance (1σ)  14 
μm  
relative position of structure and BPM reading (1σ) 

5 
μm 
Decelerator 



No. of drive beam sectors / linac 
N_{unit} 
24 

Unit length (total) 
L_{unit,total} 
876.6 
m 
Average fill factor 
F 
% 

No. of PETS / sector 
N_{PETS,unit} 
1491 

Length of PETS (active/overall) 
L_{PETS} 
0.213 / 
m 
Nominal output RF Power / PETS 
P_{out} 
136 
MW 
Transfer efficiency PETS > HDS 

93.8 
% 
Number of accelerating structures / PETS 

2 

Main beam acceleration power / PETS 
P_{acc} 
2 x 63.9 
MW 
Main beam energy gain / sector 
DE_{main} 
62.5 
GeV 
drive beam > RF efficiency (HDS input) 
η_{decRF} 
65 
% 
PETS tolerance (1σ) 

31 
μm 




Main Beam at linac injection 



Energy 
E_{b,inj} 
9 
GeV 
No. of particles / bunch 
N_{b} 
3.72 
10^{9} 
Bunch length 
σ_{s.inj} 
44 
um 
Energy spread 
ΔE/E_{inj} 
1.6 
% 
Transverse horizontal emittance (norm.) 
γε_{x,inj} 
600 
nm rad 
Transverse vertical emittance (norm.) 
γε_{y.inj} 
10 
nm rad 




Main Beam in damping ring before extraction 



Energy 
E_{b,DR} 
2.86 
GeV 
No. of particles / bunch 
N_{b} 
4.1 
10^{9} 
Bunch length 
σ_{s,DR} 
1.4 
mm 
Energy spread 
σE/E_{DR} 
0.13 
% 
Transverse horizontal emittance
(norm.) 
γε_{x.DR} 
480 
nm rad 
Transverse vertical emittance
(norm.) 
γε_{y,DR} 
4.5 
nm rad 
Longitudinal emittance 

5960 
eVm 
new values are calculated with IBS for wiggler field of 2.5T with period of 5cm, betatron coupling 0.13%, dispersion invariant of 0.25μm, Vrf=4.1MV 



Electron / positron damping ring 



Ring circumference 
C_{DR} 
420.56 
m 
Number of trains stored 
N_{train} 
2 

Number of bunches / train 
k_{b,DR} 
156 

Bunch separation 
Δt_{b,DR} 
1 
ns 
RF frequency 
f_{DR} 
999.5 
MHz 
Wiggler length 
l_{wig} 
104 
m 
Damping times 
τ_{x }/ τ_{y }/ τ_{z} 
1.88/1.91/0.96 
ms 
Tunes 
Q_{x }/ Q_{y} 
55.46 / 11.6 





Drive beam basic parameters 



Energy (decelerator injection) 
E_{in,dec} 
2.37 
GeV 
Energy (final, minimum) 
E_{fin,dec} 
237 
MeV 
Average current in pulse 
I_{dec} 
101 
A 
Train duration 
t_{train} 
243.7 
ns 
No. bunches / train 
N_{b.dec} 
2922 

Bunch charge 
Q_{b,dec} 
8.4 
nC 
Bunch separation 
D_{b,dec} 
0.083 
ns 
Bunch length, rms 
σ_{s,dec} 
1 
mm 
Normalized emittance, rms 
γε_{dec} 
150 
μm rad 




Drive Beam linac 



RF frequency 
f_{RF} 
999.5 
MHz 
Total number of klystrons 
N_{kly} 
? * 2 

Klystron peak power 
P_{kly} 
15 
MW 
Repetition frequency 
f_{rep} 
50 
Hz 
Beam energy 
E_{i} 
2.37 
GeV 
Pulse length (total train) 
t_{i} 
140.3 
μs 
Beam current per pulse 
I_{i} 
4.2 
A 
Charge per pulse 
Q_{i} 
590 
μC 
Number of bunches / pulse 
N_{b} 
70128 

Bunch length (rms) 
σ_{s} 
3 > 1 
mm 
Normalized emittance (at injection) 
γε_{i} 
≤ 100 
μm rad 
Total energy spread (at injection) 
ΔE/E 
≤ 1 
% 
Wall plug > RF efficiency 
η_{ACRF} 
58.6 
% 
RF > drive beam efficiency 
η_{bRF} 
93 
% 




Delay Line 



Length 
L_{D} 
73.05 m 
m 
RF deflector frequency 
f_{D} 
499.8 
MHz 
Combination factor 
FC_{D} 
2 

Bunch length (rms) 
σ_{s} 
2 
mm 




Combiner Ring 1 



Length 
L_{R1} 
~292 
m 
RF deflector frequency 
f_{R1} 
999.5 
MHz 
Combination factor 
FC_{R1} 
3 

Bunch length (rms) 
σ_{s} 
2 
mm 




Combiner Ring 2 



Length 
L_{R2} 
438.28 
m 
RF deflector frequency 
f_{R2} 
2998.6 
MHz 
Combination factor 
FC_{R2} 
4 

Bunch length (rms) 
σ_{s} 
2 
mm 


