Challenges for LHC and Demands on Beam Instrumentation

The LHC machine presently under construction at CERN will exceed existing super-conducting colliders by about one order of magnitude for luminosity and beam energies for pp collisions. To achieve this performance the bunch frequency is as large as 40 MHz and the range in beam intensity covers 5 x 10^9 protons to 3 x 10^14 protons with a normalized beam emittance as small as 3 microrad. This puts very stringent demands on the beam instrumentation to be able to measure beam parameters like beam positions, profiles, tunes, chromaticity, beam losses or luminosity. This document highlights selected topics in the field of LHC beam instrumentation. The examples will be chosen to cover new detection principles or new numerical data treatments, which had to be developed for the LHC as well as aspects of operational reliability for instrumentation, which will be used for machine protection systems.