Final Focus Settings
for high energy beams (layout 2003)
The table below shows a variety of possible final focus settings in H8 for the various quads. The beam in NA45 is managed by Q14-Q16. Q17 and Q18 serve for T48, H8A and H8B. The settings are given for a +300 GeV/c beam and is valid for filtermode and high-resolution mode. In brackets is the maximum momentum indicated, where the beam is transported still correctly and the current limit is reached at the same time.
|
B [kG] |
NA45 focus | T48 focus | H8A focus |
| Q14 | 9.98473 (310) | - | 9.98473 |
| Q15 | -7.98804 | - | -7.98804 |
| Q16 | 5.52126 | - | 5.52126 |
| Q17 | - | N.A. (125) | 12.09259 (270) |
| Q18 | - | N.A. (125) | -8.77044 (310) |
|
B [kG] |
PIXEL focus | T48 focus | Photon Converter | H8A focus |
| Q14 | 7.26343 | - | currents (250) | - |
| Q15 | -7.75603 | - | - | |
| Q16 | 5.46721 | - | - | |
| Q17 | - | N.A. (125) | 22.69280 (130) | |
| Q18 | - | N.A. (125) | -10.70397 (290) |
A focus in NA45 is a focus horizontally earlier than vertically. A focus PIXEL means a focus at the same time vertically/horizontally at the position of the ATLAS PIXEL detector in NA45 as it was for the high intensity run in August 2003.
|
B [kG] |
NA45 parallel | T48 focus | H8A foc | H8B foc |
| Q14 | - | - | - | |
| Q15 | - | - | - | |
| Q16 | - | - | - | |
| Q17 | - | |||
| Q18 | - |
|
B [kG] |
NA45 undef. (=approx. small) | T48 focus |
| Q14 | - | 11.00746 |
| Q15 | - | -4.68537 |
| Q16 | - | 0.0 |
| Q17 | - | 0.0 |
| Q18 | - | 0.0 |