Transcript Proton Beam Spot Size MERIT EVO Meeting September 10, 2008 Harold G. Kirk Brookhaven National Laboratory.

Proton Beam Spot Size
MERIT EVO Meeting
September 10, 2008
Harold G. Kirk
Brookhaven National Laboratory
Beam envelope (1-sigma) - =0.25 (mm.mrad), Dp=0.1%
Ilias Efthymiopoulos July 16, 2008
Without dispersion term
With dispersion term
 s(x) = 2.2mm , s(y) = 0.86 mm,
1.1
F
L
A
G
F
L
A
G
Z=0
Harold G. Kirk2
Emittance measurements
Use the data to extrapolate at higher intensities
Eh & Ev [norm]
Transverse emittance (2s) in TT2
45
40
35
30
25
20
15
10
5
0
0.0000
MERIT-Eh
MERIT-Ev
Linear (MERIT-Eh)
Linear (MERIT-Ev)
y = 11.23x + 1.5998
R² = 0.6783
y = 6.0664x + 5.6415
R² = 0.6321
0.5000
1.0000
1.5000
2.0000
2.5000
Beam intensity (1E13)
3.0000
3.5000
4.0000
For 10Tp the 2σ Normalized emittances are:
εh = 12.8 mm-mrad
εv = 11.7 mm-mrad
For a 24 GeV proton beam βγ = 26.57
1σ geometric emittances are:
εh = 0.12 mm-mrad
εv = 0.11 mm-mrad
Harold G. Kirk3
Spot Size at Z=0
Predicted 1σ beam spot size at Z=0 for 24 GeV, 10Tp
proton beam is:
s(x) = 1.5mm , s(y) = 0.73 mm,
Harold G. Kirk