# BEGIN ANSIBLE MANAGED BLOCK WIKIEDITOR #17.01.14-> wfLoadExtension( 'WikiEditor' ); # ## Enables/disables use of WikiEditor by default but still allow users to disable it in preferences #$wgDefaultUserOptions['usebetatoolbar'] = 1; #$wgDefaultUserOptions['usebetatoolbar-cgd'] = 1; # ## Displays the Preview and Changes tabs #$wgDefaultUserOptions['wikieditor-preview'] = 0; # ## Displays the Publish and Cancel buttons on the top right side #$wgDefaultUserOptions['wikieditor-publish'] = 0; #17.01.14<- # END ANSIBLE MANAGED BLOCK WIKIEDITOR Changes - EIC

Changes

Jump to navigation Jump to search
no edit summary
Line 21: Line 21:     
== Scattered protons ==
 
== Scattered protons ==
 +
To reconstruct the Mandelstam variable t, which represents the momentum transfer to the proton in exclusive reactions, it is critical to detect the forward going scattered proton.
 +
t is essential in exclusive reactions as it can be fourier transformed to the impact parameter b, which gives the transverse spatial distribution of partons in the proton.
 +
The figure below shows the scattering angle &theta; for three different center-of-mass energies as a function of the scattered proton momentum.
 +
{| border="0" cellpadding="5"
 +
|[[image:Exclusive.p.angle.png|thumb|500px| ]]
 +
|}
 +
'''This poses the following requirement that for different hadron beam energies 100 GeV and 250 GeV protons with a momentum 20\% lower then the beam energy and a scattering angles up to
 +
X mrad need to be transported through the different magnets.
 +
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.
 +
 +
    
== Detector Space and Magnetic Field ==
 
== Detector Space and Magnetic Field ==

Navigation menu