Controls Parameters for HRS magnets
|
Left
Arm |
|
|
|
|
|
|
Constant |
|
|
Dipole |
g= |
2699.388 |
(MeV/c)/T |
|
Q1 |
g= |
-1.3292 |
(MeV/c)/Amp |
|
Q2 |
g= |
-2.32237 |
(MeV/c)/Amp |
|
Q3 |
g= |
-2.51181 |
(MeV/c)/Amp |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Right
arm |
|
|
|
|
|
|
Constant |
|
|
Dipole |
g= |
2694.8 |
(MeV/c)/T |
|
Q1 |
g= |
-1.3299 |
(MeV/c)/Amp |
|
Q2 |
g= |
-2.3236 |
(MeV/c)/Amp |
|
Q3 |
g= |
-2.51314 |
(MeV/c)/Amp |
Important notes:
- These are the numbers used in the controls software. For a more accurate calibration of the central momentum of each arm see JLab-TN-01-049.
- These values are for momentum settings >450 MeV/c.
- The Dipole field referred to is that read on the NMR (D-N in figure 1), NOT the Hall Probe (D-G below).
- Quadrupoles are set by the current out of the power supply (I(A) in FIGURE 1), NOT the set current.
FIGURE 1
-JJL January 7, 2008