Single-stage plasma-based correlated energy spread compensation for ultrahigh 6D brightness electron beams.

Autor: Manahan GG; Scottish Universities Physics Alliance, Department of Physics, University of Strathclyde, Glasgow G4 0NG, UK.; Cockcroft Institute, Sci-Tech Daresbury, Keckwick Lane, Daresbury, Cheshire WA4 4AD, UK., Habib AF; Scottish Universities Physics Alliance, Department of Physics, University of Strathclyde, Glasgow G4 0NG, UK.; Cockcroft Institute, Sci-Tech Daresbury, Keckwick Lane, Daresbury, Cheshire WA4 4AD, UK.; Department of Experimental Physics, University of Hamburg, Hamburg 22761, Germany., Scherkl P; Scottish Universities Physics Alliance, Department of Physics, University of Strathclyde, Glasgow G4 0NG, UK.; Cockcroft Institute, Sci-Tech Daresbury, Keckwick Lane, Daresbury, Cheshire WA4 4AD, UK., Delinikolas P; Scottish Universities Physics Alliance, Department of Physics, University of Strathclyde, Glasgow G4 0NG, UK.; Cockcroft Institute, Sci-Tech Daresbury, Keckwick Lane, Daresbury, Cheshire WA4 4AD, UK., Beaton A; Scottish Universities Physics Alliance, Department of Physics, University of Strathclyde, Glasgow G4 0NG, UK.; Cockcroft Institute, Sci-Tech Daresbury, Keckwick Lane, Daresbury, Cheshire WA4 4AD, UK., Knetsch A; Department of Experimental Physics, University of Hamburg, Hamburg 22761, Germany., Karger O; Department of Experimental Physics, University of Hamburg, Hamburg 22761, Germany., Wittig G; Department of Experimental Physics, University of Hamburg, Hamburg 22761, Germany., Heinemann T; Scottish Universities Physics Alliance, Department of Physics, University of Strathclyde, Glasgow G4 0NG, UK.; Cockcroft Institute, Sci-Tech Daresbury, Keckwick Lane, Daresbury, Cheshire WA4 4AD, UK.; Department of Experimental Physics, University of Hamburg, Hamburg 22761, Germany.; Deutsches Elektronen-Synchrotron DESY, Hamburg 22607, Germany., Sheng ZM; Scottish Universities Physics Alliance, Department of Physics, University of Strathclyde, Glasgow G4 0NG, UK.; Cockcroft Institute, Sci-Tech Daresbury, Keckwick Lane, Daresbury, Cheshire WA4 4AD, UK.; Collaborative Innovation Center of IFSA (CICIFSA) &Laboratory for Laser Plasmas and School of Physics and Astronomy, Shanghai Jiao Tong University, Shanghai 200240, China., Cary JR; Center for Integrated Plasma Studies, University of Colorado Boulder and Tech-X Corporation, Boulder, Colorado 80303, USA., Bruhwiler DL; RadiaSoft LLC, Boulder, Colorado 80304, USA., Rosenzweig JB; Particle Beam Physics Laboratory, Department of Physics and Astronomy, University of California, Los Angeles, California 90095, USA., Hidding B; Scottish Universities Physics Alliance, Department of Physics, University of Strathclyde, Glasgow G4 0NG, UK.; Cockcroft Institute, Sci-Tech Daresbury, Keckwick Lane, Daresbury, Cheshire WA4 4AD, UK.
Jazyk: angličtina
Zdroj: Nature communications [Nat Commun] 2017 Jun 05; Vol. 8, pp. 15705. Date of Electronic Publication: 2017 Jun 05.
DOI: 10.1038/ncomms15705
Abstrakt: Plasma photocathode wakefield acceleration combines energy gains of tens of GeV m -1 with generation of ultralow emittance electron bunches, and opens a path towards 5D-brightness orders of magnitude larger than state-of-the-art. This holds great promise for compact accelerator building blocks and advanced light sources. However, an intrinsic by-product of the enormous electric field gradients inherent to plasma accelerators is substantial correlated energy spread-an obstacle for key applications such as free-electron-lasers. Here we show that by releasing an additional tailored escort electron beam at a later phase of the acceleration, when the witness bunch is relativistically stable, the plasma wave can be locally overloaded without compromising the witness bunch normalized emittance. This reverses the effective accelerating gradient, and counter-rotates the accumulated negative longitudinal phase space chirp of the witness bunch. Thereby, the energy spread is reduced by an order of magnitude, thus enabling the production of ultrahigh 6D-brightness beams.
Databáze: MEDLINE