English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Plus monthly

Global: Zendy Tools annual

Global: Zendy Tools monthly

Global: Zendy Free Plan

This paper presents a study of beam alignment in accelerating cavities basedon beam-excited higher order modes (HOM). Among the transverse HOMs, dipolemodes have the dominant contribution, and may have an adverse effect on thebeam quality. Since they depend linearly on the transverse beam offset, theireffect can be reduced by aligning the beam in the cavity. The study has beenmade on the four third harmonic superconducting cavities installed in the ACC39module at FLASH. Modes with strong beam coupling were monitored while movingthe beam and searching for the minimum excited HOM power.

A Study of Beam Alignment Based on Coupling Modes in Third Harmonic Superconducting Cavities at FLASH