bluenoborder.gif (6813 bytes)   Injector System Specifications and Parameters

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NLC Injection System Parameters version date: 7/22/99
laser added 7/26/00
Polarized Electron Source    
Energy E 120 keV
Energy Spread dE/E < 1 %
Single Bunch sigma E sE/E < 1 %
Emittance (edge)   5 10^-6m-rad
Bunch Length dt 700 ps, FWHM
Particles/Bunch nb 1.8 10^10
Pop. Uniformity dnb/nb <0.5 %
Number of Bunches Nb 95
Bunch Spacing   2.8 ns
Repetition Rate   120 Hz
Polarization 80 %
Polarized Electron Source Laser  
Wavelength   740 - 880 nm
Band width and stability   < 1 nm
Bunch Energy   5  microJ assumes 0.1% QE
Intensity stability (bunch to bunch)   < 1 % rms
Intensity stability (bunch train)   < 0.5 % rms
Bunch Spacing   2.8 ns
Bunch Length dt 700 ps
Number of Bunches Nb 95
Repetition Rate   120 Hz
Polarization 80 %
Scheduled downtime 1 %
Unscheduled downtime <0.1 %
Thermionic Electron Source  
Energy E 120 keV
Energy Spread dE/E < 1 %
Single Bunch sigma E sE/E < 1 %
Emittance (edge)   5 10-6m-rad
Bunch Length dt 700 ps
Particles/Bunch nb 2 10^10
Pop. Uniformity dnb/nb <0.5 %
Number of Bunches Nb 95
Bunch Spacing   2.8 ns
Repetition Rate   120 Hz
Bunching system  
Energy E 80 MeV
Energy Spread dE/E < 1 %
Single Bunch sigma E sE/E < 1 %
Emittance   45 10^-6m-rad
Bunch Length dt 17.5 (fwhm) ps
Particles/Bunch nb 1.4 10^10
Pop. Uniformity, sn dnb/nb <0.5 %
Number of Bunches Nb 95
SHB frequency 714 Mhz
Bunch Spacing 2.8 ns
Repetition Rate 120 Hz
Beam power (@ exit) 2.0 kW
Positron Source  
Target
Energy E 6.2 GeV
Energy spread dE/E < 1 %
Emittance   100 10^-6m-rad
Bunch Length dt 17.5 ps, FWHM
electrons/bunch on target nb 1.4 10^10
Pop. Uniformity dnb/nb <0.5 %
Number of Bunches Nb 95
Beam radius 1.6 mm rms
beam power/area  NGeV/mm^2, 10^12 1.0 < 2 (ZDR p93)
absrbd tgt power/vol  NGeV/RL*mm^2, 10^10 3.6 < 7 (ZDR p93)
Bunch Spacing   2.8 ns
Repetition Rate   120 Hz
Average Beam Power PB 158 kW
Target thickness W Re 4 RL
Target power PT 22 kW
Capture
RF frequency 1428 Mhz
bunch length 60 ps, FW
final energy 250 MeV
capture emittance .06 (edge) m-rad
energy aperture ±10 MeV
pre-DR acceptance 0.09 m-rad
e+ capture ratio into linac 2.0 #e+ per e-
e+ capture ratio into Pre-DR 0.8 = 2.0 *.4 #e+ per e-
Linacs  
Pol. e- Injector
Frequency 2856 Mhz
Energy E 1.98 GeV
Energy Spread dE/E ±1 %
Single Bunch sigma E sE/E < 0.5 %
Emittance   100 10^-6m-rad
Bunch Length dt 17.5 ps, FWHM
Particles/Bunch nb 1.2 10^10
Pop. Uniformity dnb/nb <0.5 %
Number of Bunches Nb 95
Bunch Spacing   2.8 ns
Repetition Rate   120 Hz
Positron drive linac
Frequency 2856 Mhz
Energy E 6.22 GeV
Energy Spread dE/E ±1 %
Single Bunch sigma E sE/E <0.5 %
Emittance   100 10^-6m-rad
Bunch Length dt 17.5 ps, FWHM
Particles/Bunch nb 1.4 10^10
Pop. Uniformity dnb/nb <0.5 %
Number of Bunches Nb 95
Bunch Spacing   2.8 ns
Repetition Rate   120 Hz
Positron Injector linac
Frequency 1428 Mhz
Energy E 1.98 GeV
Energy Spread dE/E ±1 %
Single Bunch sigma E sE/E < 1.2 %
Emittance   0.06 (edge) m-rad
Bunch Length dz 3.7 mm, sigma
Particles/Bunch nb 2.8 10^10
Pop. Uniformity dnb/nb <1 %
Number of Bunches Nb 95
Bunch Spacing   2.8 ns
Repetition Rate   120 Hz
Pre-DR acceptance 0.09 m-rad
Energy acceptance ±1.5 %
Injector linacs (e-&e+)
Frequency 2856 Mhz
Energy E 10 GeV
Energy Spread dE/E ±1 %
Single Bunch sigma E sE/E < 1.5 %
Horizontal Emittance   3 10^-6m-rad
Vertical Emittance   0.03 10^-6m-rad
Bunch Length sigma z 100 microns
Particles/Bunch nb 1.15 10^10
Number of Bunches Nb 95
Bunch Spacing   2.8 ns
Repetition Rate   120 Hz
Damping Rings
Main Rings Pre-Damping Ring
nominal ring energy E 1.98 GeV 1.98 GeV
number of bunch trains stored Nt 3 2  
number of bunches per train Nb 95 95  
maximum bunch population nb 1.6 10^10 1.9 10^10
bunch to bunch spacing   2.8 nsec 2.8 nsec
gap between bunch trains   65 nsec 100 nsec
maximum collider repetition rate   120 Hz 120 Hz
RF frequency   714 MHz 714 MHz
 
nominal ring circumference   297.27 m 218.34 m
Number of TME-cells  per arc   15 6  
Length of one TME-cell   6.01 m 11.00 m
Bend angle of arc dipole   12 deg 30 deg
Length of straight section   58.00 m 43.20 m
average radius of an arc   28.85 m 21.00 m
 
Length of a wiggler section   2.19 m 2.13 m
Number of wiggler sections   20 8  
Peak field of wiggler   21.5 kG 21 kG
Wiggler period   0.27 m 1.00 m
vertical gap of wiggler   ~20 mm ~50 mm
periods per wiggler section   8.13 2.13  
 
inj. hor./ver. emittance (norm., rms) ex0,y0 150 10^-6m-rad 42000 10^-6m-rad
extracted horiz. emittance (norm., rms) ex 3 10^-6m-rad 160 10^-6m-rad
extracted vert. emittance (norm., rms) ey 0.03 10^-6m-rad 160 10^-6m-rad
extracted energy spread (rms)   0.089 % 0.089 %
extracted bunch length (rms)   4 mm 7.53 mm
damping time tau x,y 5.2 msec 5.0 msec

 

 

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| 12/12/00 | Owner: David Schultz | Page credits and Comments |