Books

Non-supersymmetric Grand Unified $SO(10)\times U(1)_{\rm PQ}$ models have all the ingredients to solve several fundamental problems of particle physics and cosmology -- neutrino masses and mixing, baryogenesis, the non-observation of strong CP violation, dark matter, inflation -- in one stroke. The axion -- the pseudo Nambu-Goldstone boson arising from the spontaneous breaking of the $U(1)_{\rm PQ}$ Peccei-Quinn symmetry -- is the prime dark matter candidate in this setup. [...]

The RF needs for the TESLA Test Facility a DESY are described. Possible klystron‐modulator schemes, the waveguide RF distribution system, phase and amplitude control, beam loading, and a scheme to cope with detuning of the cavities due to Lorentz forces are described [...]