Abstract
In this paper the main forward ATLAS detectors are described. Two recent and major studies in ATLAS in the field of forward physics are also discussed.
Highlights
ALFA in the LHC tunnel. 2 stations are located each side of ATLAS detector at 240 m distance from the IP
●2010/2011 luminosity determined by machine parameters using the Van der Meer (VdM) scan
● First measurement from ATLAS of the pp inelastic cross. ● Luminosity dominant experimental error. ● Low-mass diffraction is not measured because the diffractive system is outside the acceptance
Summary
● Each side segmented into 2 discs, each disc in in 8 scintillator counters. ● Primary minimum bias trigger for low luminosity (rapidity gap topology). ● Each side segmented into 2 discs, each disc in in 8 scintillator counters. ● Primary minimum bias trigger for low luminosity (rapidity gap topology). ● Both ZDCs reside in a slot of the TAN Absorber ~ 140 m from IP. ● + 1 mm quartz rod parallel to beam for position measurement. ● + 1.5 mm quartz rod for energy measurement. ● At 1033 cm-2s-1 it survives for few years. ● At 1034 cm-2s-1 it survives for few months
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