Progress on $e^{+}e^{-}$ linear colliders

Physics issues. The physics program will be reviewed for e+e- linear colliders in the TeV energy range. At these prospective facilities central issues of particle physics can be addressed, the problem of mass, unification and structure of space-time. In this context the two lectures will focus on analyses of the Higgs mechanism, supersymmetry and extra space dimensions. Moreover, high-precision studies of the top-quark and the gauge boson sector will be discussed. Combined with LHC results, a comprehensive picture can be developed of physics at the electroweak scale and beyond. Designs and technologies (R. Siemann - 29, 30, 31 May) The physics and technologies of high energy linear colliders will be reviewed. Fundamental concepts of linear colliders will be introduced. They will be discussed in: <ol> <ol> <li>the context of the Stanford Linear Collider where many ideas changed and new ones were developed in response to operational experience.</li> <li>the requirements for future linear colliders. The different approaches for reaching E_CM ~ 0.5 - multi-TeV energy scale will be examined with consideration given to the underlying accelerator physics and the accelerator technology.