During the 2011 run of the LHC there was a significant measured temperature
increase in the LHC Injection Kicker Magnets (MKI) during operation with 50ns
bunch spacing. This was due to increased beam-induced heating of the magnet due
to beam impedance. Due to concerns about future heating with the increased
total intensity to nominal and ultimate luminosities a review of the impedance
reduction techniques within the magnet was required. A number of new beam
screen designs are proposed and their impedance evaluated. Heating estimates
are also given with a particular attention paid to future intensity upgrades to
ultimate parameters