Higher Order Modes In Third Harmonic Cavities at Flash

2010/10/03 by I.R.R. Shinton, N. Baboi, Shinton, I. R. R. +9 · 1 citation
Engineering · Physics and Astronomy · #Accelerator Physics (physics.acc-ph) #Energy Harvesting in Wireless Networks #FOS: Physical sciences #Gyrotron and Vacuum Electronics Research #Particle accelerators and beam dynamics

paper · doi:10.48550/arxiv.1010.0437

openalex publication_date 2010/10/03 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/29

Abstract

Transverse modes in the 3.9 GHz cavities, designed and fabricated by FNAL, are reported on. These modes have the potential to cause significant emittance dilution if they are not sufficiently suppressed. Recent probe-based-experiments have indicated significant discrepancies between modes predicted in stand-alone 9-cell cavities compared to those in 4-cavity modules. We employ the code HFSS to analyze these modes, coupled through beam tubes whose cut-off is above that of the first dipole band.

Cited by

• A Study of Beam Position Diagnostics with Beam-excited Dipole Higher Order Modes using a Downconverter Test Electronics in Third Harmonic 3.9 GHz Superconducting Accelerating Cavities at FLASH

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