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Home Search Quick Search Advanced Fulltext Browse Collections Persons My eDoc Session History Login Name: Password: Documentation Help Support Wiki Direct access to document ID:	Institute: MPI für Physik     Collection: YB 2016     Display Documents ID: 715733.0, MPI für Physik / YB 2016 Seeding of Self-Modulation Instability of a Long Electron Bunch in a Plasma Authors: Fang, Y.; Yakimenko, V. E.; Babzien, M.; Fedurin, M.; Kusche, K. P.; Malone, R.; Vieira, J.; Mori, W. B.; Muggli, P. Date of Publication (YYYY-MM-DD): 2014 Title of Journal: Physical Review Letters Journal Abbrev.: Phys.Rev.Lett. Issue / Number: 112 Start Page: 045001 Audience: Not Specified Intended Educational Use: No Abstract / Description: We demonstrate experimentally that a relativistic electron bunch shaped with a sharp rising edge drives plasma wakefields with one to seven periods along the bunch as the plasma density is increased. The plasma density is varied in the 1015–1017  cm−3 range. The wakefields generation is observed after the plasma as a periodic modulation of the correlated energy spectrum of the incoming bunch. We choose a low bunch charge of 50 pC for optimum visibility of the modulation at all plasma densities. The longitudinal wakefields creating the modulation are in the MV/m range and are indirect evidence of the generation of transverse wakefields that can seed the self-modulation instability, although the instability does not grow significantly over the short plasma length (2 cm). We show that the seeding provides a phase reference for the wakefields, a necessary condition for the deterministic external injection of a witness bunch in an accelerator. This electron work supports the concept of similar experiments in the future, e.g., SMI experiments using long bunches of relativistic protons. Classification / Thesaurus: AWAKE External Publication Status: published Document Type: Article Communicated by: MPI für Physik Affiliations: MPI für Physik Identifiers: LOCALID:MPP-2014-17 URL:http://link.aps.org/doi/10.1103/PhysRevLett.112.04... URL:https://publications.mppmu.mpg.de/?action=search&m... The scope and number of records on eDoc is subject to the collection policies defined by each institute - see "info" button in the collection browse view.