CMS Forward Hadron Calorimeters Phase II Upgrade

Phase II Upgrade of the CMS forward hadron calorimeters necessitates from the fact that these calorimeters will not be able to survive the HL-LHC (High Luminosity LHC) conditions. The upgrade path is tentatively divided into two scenarios: The replacement of the active media in the endcap hadron calorimeter section keeping the existing mechanical and electronics structure in place; the construction of a new forward hadron calorimeter system. This talk will discuss various upgrade options based on these two scenarios. Brief explanation of the detector concepts and future test plans will be presented.