LHC Collision Optics Version V6.5
This page is meant for people who would like to track particles through the
LHC ring without using the MAD-X
simulation programme. The information on the optical functions and element
strengths can be found following the link in the tables below. The tables are
extracted from MAD-X and therefore following its conventions. Please, read
carefully the MAD-X conventions before using the data in the tables.
MAD-X
reference system
Sign
Convention
Definition of
the optical functions
Definition of
the element strengths
Definition of reference orbit
Definition of
the closed orbit correctors
Definition
of the apertures
How to crosscheck the direction of the
magnetic forces
Useful links:
OPTICS TABLES
- The s coordinate in the files regarding IR1 has
the starting point in IP3. The remaining files have the starting point in
IP1.
- The ALICE and LHCb dipoles are considered as vertical and horizontal kickers
respectively. They follow the MAD-X conventions for the orbit correctors.
- The information on the optics and the magnet
polarities in all experimental IPs is important because this will change the
vertical dispersion of the machine (DY). If this information is not used,
the 4 IPs can be considered independent.
| Proton Proton Collision, Nominal scheme,
Optics V6.5 |
| Beam 1 |
Beam 2 |
|
IR1 (beta* = 0.55 m, total crossing angle = 285 microrad) |
IR1 (beta* = 0.55 m, total crossing angle = 285 microrad) |
|
IR2 (beta* = 10 m, total crossing angle = 300
microrad) |
IR2 (beta* = 10 m, total crossing angle =
300 microrad) |
|
IR5 (beta* = 0.55 m, total crossing angle = 285 microrad) |
IR5 (beta* = 0.55 m, total crossing angle = 285 microrad) |
|
IR8 (beta* = 10 m, total crossing angle = - 70 microrad) |
IR8 (beta* = 10 m, total crossing angle =
-70 microrad) |
|
Whole ring |
Whole ring |
| Proton Proton
Collision, Early scheme, Optics V6.5
(in work) |
| Beam 1 |
Beam 2 |
| IR1 (beta* = 2 m) |
IR1 (beta* = 2 m) |
| IR2 (beta* = 10 m) |
IR2 (beta* = 10 m) |
| IR5 (beta* = 2 m) |
IR5 (beta* = 2 m) |
| IR8 (beta* = 2 m) |
IR8 (beta* = 2 m) |
| Whole ring |
Whole ring |