Beam diagnostics in superconducting accelerating cavities : the extraction of transverse beam position from beam-excired higher order modes / Pei Zhang
Introduction -- Electromagnetic Eigenmode Simulations of the Third Harmonic Cavity -- Measurements of HOM Spectra -- Analysis Methods for Beam Position Extraction from HOM -- Dependencies of HOM on Transverse Beam Offsets -- HOM-Based Beam Position Diagnostics -- Conclusions
Summary
This workemploys self-excited wakefields as a diagnostic to remotely determine the beam position within a superconducting cavity and chains thereof. Several numerical techniques are delineated in order to ascertain the most appropriate technique in terms of reliability and accuracy. The methodologyis carefully explainedmaking the presentation pedagogically appropriate to students new to the field as well asresearchers familiar with this topic. Pei Zhang'sachievementswill serve as a basis for the development of similar monitors at various other facilities around the world
