CONICAL HALF-WAVE RESONATOR INVESTIGATIONS

In the low energy part of accelerators the magnets usually alternate accelerating cavities. For these particle energies Half-Wave Resonators are considered. Such layout allows enlargement of the peripherical cavity volume containing RF magnetic field. This results in decreasing the cavity peak surface magnetic field Bpk/Eacc by the factor of two. Additionally, an enlarged dome volume allows an installation of magnetic tuner for cavity frequency adjustment without affection of Bpk/Eacc. The paper reports the results of superconducting Half- Wave Resonator shape developments. A magnetic plunger for cavity frequency tune is investigated. Different cavity shape modifications are suitable also for close situated cavities. The results are applicable for SC RF Quarter-Wave Resonators.