Optical properties of the A1 spectrometers

 

 

 

 

 

 

 

 

 

 

units A B C
Configuration - QSDD D QSDD
dispersive plane - point-ponit point-ponit point-ponit
non dispersive plane - parallel-ponit point-ponit parallel-ponit
Maximum momentum [MeV/c] 735 870 551
Reference momentum [MeV/c] 630 810 459
Central Momentum [MeV/c] 665 810 490
Solid Angle [msr] 28 5.6 28
Scattering Angle - - - -
minimum angle - 18°
maximum angle - 160° 62° 160°
Momentum acceptance - 20% 15% 25%
Angular acceptance - - - -
dispersive [mrad] 70 70 70
nondispersive [mrad] 100 20 100
Long target acceptance [mm] 50 50 50
angle of focal plane - 45° 47° 45°
length of focal plane [m] 1.80 1.80 1.60
length of central trajectory [m] 10.75 12.03 8.53
Dispersion (central) [cm/%] 5.77 8.22 4.52
Magnification (central) - 0.53 0.85 0.51
Dispersion/Magnification [cm/%] 10.83 9.64 8.81
momentum resolutuon - 10⁻⁴ 10⁻⁴ 10⁻⁴
angular resolution at target [mrad] <3 <3 <3
position resolution at target [mm] 3-5 1 3-5