Using LHC as injector and possible uses of HERA magnets/coils
  This workshop discusses the various aspects of a high energy version of the LHC in the LHC tunnel, the basic assumption being that the LHC will be decommissioned. The possibilities to recycle LHC and the already stopped HERA are discussed in this paper. 
K.H. Mess (CERN)
physics.acc-ph