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

In a linac driven Free Electron Laser (FEL), the shot-to-shot andnon-invasive monitoring of the electron bunch length is normally ensured byBunch Compressor Monitors (BCMs). The bunch-length dependent signal of a BCMresults from the detection and integration - over a given frequency band - ofthe temporal coherent enhancement of the radiation spectral energy emitted bythe electron beam while experiencing a longitudinal compression. In thisletter, we present a method that permits to express the relative variation ofthe bunch length as a function of the relative statistical fluctuations of theBCM signal and charge. Furthermore, in the case of a BCM equipped with twodetectors simultaneously operating in two distinct wavelength bands, the methodpermits an absolute determination of the bunch length. The presented method isbeneficial to a FEL since it permits to tune the machine compression feedbackwith respect to the measured bunch length instead of the bunch-length dependentsignal. In a CW-linac driven FEL, it can offer the precious opportunity toimplement a fully non-invasive and absolute diagnostics of the bunch length.

Absolute and non-invasive determination of the electron bunch length in a Free Electron Laser using a Bunch Compressor Monitor