What you get? Transverse and Longitudinal Distributions

The transverse beam emittances of the LHC proton and ion beams can be inferred by measuring the beam sizes with Wire Scanner (WS), Synchrotron Radiation (BSRT) and Beam Gas Ionization (BGI) monitors. The Abort Gap Monitor (AGM) and the Longitudinal Density Monitor (LDM) are used to characterize the longitudinal distributions. This paper covers at first all aspects related to the use of such devices in 2012. Achieved performances, reliability and operational limitations, like system failures due to high intensity beams or ageing are covered. A particular emphasis is given to the planned system upgrades for improving accuracy and robustness, while coping with both the operational limits and the LHC energy and intensity upgrades after LS1. This includes the impact of the 25 ns bunch spacing on the bunch per bunch measurements and the need for resolving smaller beam sizes at 7 TeV.