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There is only a very weak correlation between the momentum and the scattering angle.  
 
There is only a very weak correlation between the momentum and the scattering angle.  
 
These protons cannot be detected in the main detector. The standard detectors used to detect the scattered proton are roman pots placed at different distances from the IR.
 
These protons cannot be detected in the main detector. The standard detectors used to detect the scattered proton are roman pots placed at different distances from the IR.
Using this detector technology poses an other requirement on the machine performance. To reach as small scattering angles as possible a small emittance of the beam is crucial as  there is also an additional requirement of 10 sigma clearance from the core of the beam.
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Using this detector technology poses an other requirement on the machine performance. To reach as small scattering angles as possible a small emittance of the beam is crucial as  there is also an additional requirement of 10 &sigma; clearance from the core of the beam.
To have good acceptance at low scattering angle the beam needs to be cooled and we need
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To have good acceptance at low scattering angle the beam needs to be cooled in transverse direction to achieve a beam angular divergence of ~100&mu;rad
    
== Detector Space and Magnetic Field ==
 
== Detector Space and Magnetic Field ==

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