Abstract：
:In recent and future synchrotron radiation facilities, relativistic electron bunches with increasingly high charge density are needed for producing brilliant light at various wavelengths, from X-rays to terahertz. In such conditions, interaction of electron bunches with their own emitted electromagnetic fields leads to instabilities and spontaneous formation of complex spatial structures. Understanding these instabilities is therefore key in most electron accelerators. However, investigations suffer from the lack of non-destructive recording tools for electron bunch shapes. In storage rings, most studies thus focus on the resulting emitted radiation. Here, we present measurements of the electric field in the immediate vicinity of the electron bunch in a storage ring, over many turns. For recording the ultrafast electric field, we designed a photonic time-stretch analog-to-digital converter with terasamples/second acquisition rate. We could thus observe the predicted link between spontaneous pattern formation and giant bursts of coherent synchrotron radiation in a storage ring.
journal_name
Sci Repjournal_title
Scientific reportsauthors
Bielawski S,Blomley E,Brosi M,Bründermann E,Burkard E,Evain C,Funkner S,Hiller N,Nasse MJ,Niehues G,Roussel E,Schedler M,Schönfeldt P,Steinmann JL,Szwaj C,Walther S,Müller ASdoi
10.1038/s41598-019-45024-2subject
Has Abstractpub_date
2019-07-17 00:00:00pages
10391issue
1issn
2045-2322pii
10.1038/s41598-019-45024-2journal_volume
9pub_type
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