PS Beam parameters
Tagged Photon runs :
The beam parameters has been studied using the first two tagger chambers.
We found that the beam can be described with a gaussian shape with lower/upped bounds.
In the following table are the parameters (with incertitude) for the beam spot gaussian, they don't depend on the beam energy.
Beam Spot |
Position |
|
Min |
|
Max |
|
RMS |
|
(mm) |
Mean |
RMS |
Mean |
RMS |
Mean |
RMS |
Mean |
RMS |
Horizontal |
3.49 |
0.68 |
-17.96 |
0.18 |
23.24 |
0.7 |
12.14 |
0.47 |
Vertical |
-11.16 |
0.36 |
-26.5 |
0 |
8.38 |
0.86 |
10.43 |
0.25 |
In the following table are the parameters for bean divergence as function of the nominal energy of the electron beam.
Divergence |
|
|
|
|
|
Momentum |
0.5 |
1 |
1.5 |
2.5 |
(GeV) |
Horizontal |
10.03 |
7.17 |
4.82 |
3.17 |
(mrad) |
Vertical |
7.19 |
4.45 |
3.38 |
2.33 |
(mrad) |