Privacy and Security Notice
Settings for fpp_scat_5
Measure the carbon scattering efficiency for Tp
= 1.012 for carbon thickness of 22.9 (9''), 30.5 cm (3''+9'' doors), 41.9
cm (1 1/2''+6''+9''), and 49.5cm ( all doors).
-
Beam Energy
-
4.045 GeV
-
Beam position
-
< .25 for x and y for 3A and
3B
-
Raster size
-
1.5x1.5mm
-
Beam Current
-
» 50mA.
-
Target
-
15cm LH2
-
Spectrometer settings
| Spectrometer |
Momentum |
Angle |
Collimator |
| Electron |
3.033 GeV |
22.70° |
6msr |
|
|
|
|
| Proton |
1.710 GeV |
43.17° |
6msr |
-
Magnet settings
| Spectrometer |
Dipole |
Q1 |
Q2 |
Q3 |
| Electron |
1.19352 T |
2268.97 A |
1298.64 A |
1200.69 A |
|
|
|
|
|
| Proton |
0.631203 T |
1279.01 A |
732.035 A |
676.824 A |
The electron quads are all set to negative polarity. The hadron Q1 and
Q3 are set to positive polarity, but Q2 is set to negative polarity.
-
Data taking
-
The T5 prescale should be one. The prescales for T1,T2,T3 and T4 should
be set to give less than 5 Hz trigger rate for each. The T8 prescale should
be set to maximum.
The trigger setup should be proton_1700-4000.settings .
For each carbon thickness run for 15 minutes. Have allowed 15 minutes
for carbon door changes.