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

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

415

MW

Wall plug to main beam power efficiency

ηtot

7

%

 

 


 

 

 


 

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 (norm.)

γεx

660

nm rad

Input transverse vertical emittance (norm.)

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

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

%

Pre-alignment acc. structure tolerance (1σ)
14
μm
Pre-alignment quadrupole tolerance (1σ)
17 μm
Pre-alignment 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

1.6

%

Transverse horizontal emittance (norm.)

γεx,inj

600

nm rad

Transverse vertical emittance (norm.)

γεy.inj

10

nm rad

 

 


 

Main Beam in damping ring before extraction

 


 

Energy

Eb,DR

2.86

GeV

No. of particles / bunch

Nb

4.1

109

Bunch length

σs,DR

1.4
mm

Energy spread

σE/EDR

0.13

%

Transverse horizontal emittance (norm.)

γεx.DR

480

nm rad

Transverse vertical emittance (norm.)

γεy,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

CDR

420.56

m

Number of trains stored

Ntrain

2

 

Number of bunches / train

kb,DR

156

 

Bunch separation

Δtb,DR

1

ns

RF frequency

fDR

999.5

MHz

Wiggler length

lwig

104

m

Damping times

τx / τy / τz

1.88/1.91/0.96

ms

Tunes

Qx / Qy

55.46 / 11.6

 

Tolerances

 


 





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

? * 2

 

Klystron peak power

Pkly

15

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

3 -> 1

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

~292

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