CLIC
PARAMETER LIST 3 TeV
500 GeV -> 3 TeV evolution options here
Last update 11.10.07
|
Parameter |
Symbol |
2008 CLIC Note 764 (present parameters) |
Unit |
|
Overall Parameters |
|
|
|
|
Center of mass energy |
Ecm |
3000 |
GeV |
|
Main Linac RF Frequency |
fRF |
11.994 |
GHz |
|
Luminosity |
L |
5.9 |
1034 cm-2 s-1 |
|
Luminosity (in 1% of energy) |
L99% |
2 |
1034 cm-2 s-1 |
|
Linac repetition rate |
frep |
50 |
Hz |
|
No. of particles / bunch |
Nb |
3.72 |
109 |
|
No. of bunches / pulse |
kb |
312 |
|
|
Bunch separation |
Δtb |
0.5 (6 periods) |
ns |
|
Bunch train length |
τtrain |
156 |
ns |
|
Beam power / beam |
Pb |
14 |
MW |
|
Unloaded / loaded gradient |
Gunl/l |
120
/ 100 |
MV/m |
|
Overall two linac length |
llinac |
42.16 |
km |
|
Total beam delivery length |
lBD |
2
x 2.75 |
km |
|
Proposed site length |
ltot |
48.4 |
km |
|
Total site AC power |
Ptot |
392 |
MW |
|
Wall plug to main beam power efficiency |
ηtot |
7.1 |
% |
|
|
|
|
|
|
|
|
|
|
|
Beam Delivery System + IP |
|
|
|
| Total diagnostic section length | ldiag | 2 x 0.37 |
km |
|
Total collimation system length |
lcoll |
2 x 1.92 |
km |
|
Total final Focus system length |
lFF |
2 x 0.46 |
km |
|
Input transverse horizontal emittance |
γεx |
660 |
nm rad |
|
Input transverse vertical emittance |
γεy |
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 |
σs.inj |
44 |
um |
|
Initial RMS Energy spread |
σ*DE/E |
0.29 |
% |
|
Total Energy spread |
|
% |
|
|
Crossing angle at IP |
θC |
20 |
mrad |
|
Disruptions |
Dx / Dy |
|
|
|
Beamstrahlung parameter |
Υ0 |
|
|
|
Beamstrahlung mom. spread |
δB |
29 |
% |
|
No. of photons / electron |
nγ |
2.2 |
|
|
No. of pairs (pTmin=20MeV/c, θmin=0.2) |
Npairs |
45 |
|
|
No. of coherent pairs |
Ncoh |
38 |
107 |
|
Hadronic events / crossing |
Nhadron |
2.7 |
|
|
No. of jets (pTmin=3.2 GeV/c) |
Njets |
|
|
|
Peak luminosity |
Lpk |
5.9 |
1034 cm-2 s-1 |
|
Luminosity (in 1% of energy) |
L99% |
2.0 |
1034 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 |
ovhrep |
5 |
% |
|
Overhead for off-crest operation |
ovhoff-crest |
5 |
% |
|
Acceleration structure length (active/full) |
lstruct |
0.229 |
m |
|
a/λ |
a/λ |
0.11 |
|
|
Group velocity |
vg/c |
1.66 - 0.83 |
% |
|
Filling time / rise time |
tf |
62.9/22.4 |
ns |
|
RF -> main beam efficiency |
ηbRF |
27.7 |
% |
| Acc. structure tolerance (1σ) | 14 |
μm | |
| Quadrupole tolerance (1σ) | 17 |
μm | |
| Quadrupole BPM tolerance (1σ) | 14 |
μm | |
|
relative position of structure and BPM reading (1σ) |
|
5 |
μm |
|
Decelerator |
|
|
|
|
No. of drive beam sectors / linac |
Nunit |
24 |
|
|
Unit length (total) |
Lunit,total |
876.6 |
m |
|
Average fill factor |
F |
% |
|
|
No. of PETS / sector |
NPETS,unit |
1491 |
|
|
Length of PETS (active/overall) |
LPETS |
0.213 / |
m |
|
Nominal output RF Power / PETS |
Pout |
136 |
MW |
|
Transfer efficiency PETS > HDS |
|
93.8 |
% |
|
Number of accelerating structures / PETS |
|
2 |
|
|
Main beam acceleration power / PETS |
Pacc |
2 x 63.9 |
MW |
|
Main beam energy gain / sector |
DEmain |
62.5 |
GeV |
|
drive beam -> RF efficiency (HDS input) |
ηdecRF |
65 |
% |
|
PETS tolerance (1σ) |
|
31 |
μm |
|
|
|
|
|
|
Main Beam at linac injection |
|
|
|
|
Energy |
Eb,inj |
9 |
GeV |
|
No. of particles / bunch |
Nb |
3.72 |
109 |
|
Bunch length |
σs.inj |
44 |
um |
|
Energy spread |
ΔE/Einj |
1.3 |
% |
|
Transverse horizontal emittance |
γεx,inj |
600 |
nm rad |
|
Transverse vertical emittance |
γεy.inj |
10 |
nm rad |
|
|
|
|
|
|
Main Beam in damping ring before extraction |
|
|
|
|
Energy |
Eb,DR |
2.424 |
GeV |
|
No. of particles / bunch |
Nb |
3.72+10% |
109 |
|
Bunch length |
σs,DR |
1.53 |
mm |
|
Energy spread |
σE/EDR |
0.134 |
% |
|
Transverse horizontal emittance |
γεx.DR |
381 |
nm rad |
|
Transverse vertical emittance |
γεy,DR |
4.1 |
nm rad |
|
Longitudinal emittance (normalized) |
|
4996 |
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 |
CDR |
365.2 |
m |
|
Number of trains stored |
Ntrain |
1 |
|
|
Number of bunches / train |
kb,DR |
312 |
|
|
Bunch separation |
Δtb,DR |
0.5 |
ns |
|
RF frequency |
fDR |
1999 |
MHz |
|
Wiggler length |
lwig |
152 |
m |
|
Damping times |
tx / ty / tz |
1.5/1.5/0.76 |
ms |
|
Tunes |
Qx / Qy |
69.84 / 33.8 |
|
|
|
|
|
|
|
Drive beam basic parameters |
|
|
|
|
Energy (decelerator injection) |
Ein,dec |
2.37 |
GeV |
|
Energy (final, minimum) |
Efin,dec |
237 |
MeV |
|
Average current in pulse |
Idec |
101 |
A |
|
Train duration |
ttrain |
243.7 |
ns |
|
No. bunches / train |
Nb.dec |
2922 |
|
|
Bunch charge |
Qb,dec |
8.4 |
nC |
|
Bunch separation |
Db,dec |
0.083 |
ns |
|
Bunch length, rms |
σs,dec |
1 |
mm |
|
Normalized emittance, rms |
γεdec |
150 |
μm rad |
|
|
|
|
|
|
Drive Beam linac |
|
|
|
|
RF frequency |
fRF |
999.5 |
MHz |
|
Total number of klystrons |
Nkly |
326 * 2 |
|
|
Klystron peak power |
Pkly |
33 |
MW |
|
Repetition frequency |
frep |
50 |
Hz |
|
Beam energy |
Ei |
2.37 |
GeV |
|
Pulse length (total train) |
ti |
140.3 |
μs |
|
Beam current per pulse |
Ii |
4.2 |
A |
|
Charge per pulse |
Qi |
590 |
μC |
|
Number of bunches / pulse |
Nb |
70128 |
|
|
Bunch length (rms) |
σs |
4 |
mm |
|
Normalized emittance (at injection) |
γεi |
≤ 100 |
μm rad |
|
Total energy spread (at injection) |
ΔE/E |
≤ 1 |
% |
|
Wall plug -> RF efficiency |
ηACRF |
58.6 |
% |
|
RF -> drive beam efficiency |
ηbRF |
93 |
% |
|
|
|
|
|
|
Delay Line |
|
|
|
|
Length |
LD |
73.05 m |
m |
|
RF deflector frequency |
fD |
499.8 |
MHz |
|
Combination factor |
FCD |
2 |
|
|
Bunch length (rms) |
σs |
2 |
mm |
|
|
|
|
|
|
Combiner Ring 1 |
|
|
|
|
Length |
LR1 |
146.09 |
m |
|
RF deflector frequency |
fR1 |
999.5 |
MHz |
|
Combination factor |
FCR1 |
3 |
|
|
Bunch length (rms) |
σs |
2 |
mm |
|
|
|
|
|
|
Combiner Ring 2 |
|
|
|
|
Length |
LR2 |
438.28 |
m |
|
RF deflector frequency |
fR2 |
2998.6 |
MHz |
|
Combination factor |
FCR2 |
4 |
|
|
Bunch length (rms) |
σs |
2 |
mm |
|
|
|
|
|