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Evolution of densit...
Evolution of density-modulated electron beams in drift sections
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- Khan, Shaukat (author)
- TU Dortmund Univ, Ctr Synchrotron Radiat, Maria Goeppert Mayer Str 2, D-44227 Dortmund, Germany.;TU Dortmund Univ, Dept Phys, Maria Goeppert Mayer Str 2, D-44227 Dortmund, Germany.
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- Perosa, Giovanni (author)
- Uppsala universitet,FREIA,Elettra Sincrotrone Trieste SCpA, Str Statale 14 Km 163 5 AREA Sci Pk, I-34149 Basovizza, Italy.
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- Sottocorona, Filippo (author)
- Elettra Sincrotrone Trieste SCpA, Str Statale 14 Km 163 5 AREA Sci Pk, I-34149 Basovizza, Italy.;Univ Trieste, Dipartimento Fis, Piazzale Europa 1, I-34127 Trieste, Italy.
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- Brynes, Alexander (author)
- Elettra Sincrotrone Trieste SCpA, Str Statale 14 Km 163 5 AREA Sci Pk, I-34149 Basovizza, Italy.
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- De Ninno, Giovanni (author)
- Elettra Sincrotrone Trieste SCpA, Str Statale 14 Km 163 5 AREA Sci Pk, I-34149 Basovizza, Italy.;Univ Nova Gorica, Lab Quantum Opt, Vipavska 11c, Nova Ajdovscina 5270, Slovenia.
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- Penco, Giuseppe (author)
- Elettra Sincrotrone Trieste SCpA, Str Statale 14 Km 163 5 AREA Sci Pk, I-34149 Basovizza, Italy.
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- Ribi, Primo z Rebernic (author)
- Elettra Sincrotrone Trieste SCpA, Str Statale 14 Km 163 5 AREA Sci Pk, I-34149 Basovizza, Italy.
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- Spampinati, Simone (author)
- Elettra Sincrotrone Trieste SCpA, Str Statale 14 Km 163 5 AREA Sci Pk, I-34149 Basovizza, Italy.;INFN, Lab Nazl Frascati, Via Enr Fermi 54, I-00044 Frascati, Italy.
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- Spezzani, Carlo (author)
- Elettra Sincrotrone Trieste SCpA, Str Statale 14 Km 163 5 AREA Sci Pk, I-34149 Basovizza, Italy.
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- Trove, Mauro (author)
- Elettra Sincrotrone Trieste SCpA, Str Statale 14 Km 163 5 AREA Sci Pk, I-34149 Basovizza, Italy.
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- Giannessi, Luca (author)
- Elettra Sincrotrone Trieste SCpA, Str Statale 14 Km 163 5 AREA Sci Pk, I-34149 Basovizza, Italy.;INFN, Lab Nazl Frascati, Via Enr Fermi 54, I-00044 Frascati, Italy.
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- Allaria, Enrico (author)
- Elettra Sincrotrone Trieste SCpA, Str Statale 14 Km 163 5 AREA Sci Pk, I-34149 Basovizza, Italy.
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- Schneidmiller, Evgeny (author)
- Deutsch Elektronen Synchrotron DESY, Notkestr 85, D-22607 Hamburg, Germany.
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- Ferrari, Eugenio (author)
- Deutsch Elektronen Synchrotron DESY, Notkestr 85, D-22607 Hamburg, Germany.
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TU Dortmund Univ, Ctr Synchrotron Radiat, Maria Goeppert Mayer Str 2, D-44227 Dortmund, Germany;TU Dortmund Univ, Dept Phys, Maria Goeppert Mayer Str 2, D-44227 Dortmund, Germany. FREIA (creator_code:org_t)
- American Physical Society, 2024
- 2024
- English.
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In: Physical Review Accelerators and Beams. - : American Physical Society. - 2469-9888. ; 27:4
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Abstract
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- Initiating the amplification process in a short-wavelength free-electron laser (FEL) by external seed laser pulses results in radiation with a high degree of longitudinal and transverse coherence. The basic layout in seeded harmonic generation involves a periodic electron energy modulation by laser-electron interaction in a short undulator (the "modulator"), which is converted into a density modulation in a dispersive section immediately followed by a long FEL undulator (the "radiator") tuned to a harmonic of the seed laser wavelength. With the advent of more complex seeding schemes, density-modulated beams may need to be transported in drift sections before entering the radiator. Long FEL undulators may also contain several drift spaces to accommodate focusing elements and diagnostics. Therefore, it is of general interest to study the evolution of density-modulated electron beams in drift sections under the influence of repulsive Coulomb forces. At FERMI, a seeded FEL user facility in Trieste, Italy, systematic studies of the impact of varying drift length on coherent harmonic emission were undertaken. In order to make the underlying physics transparent, the emphasis of this paper is on reproducing the experimental findings with analytical estimates and a simple one-dimensional numerical model. Furthermore, the Coulomb forces in a drift section may be employed to enhance the laser-induced energy modulation and yield an improved density modulation before entering the FEL radiator.
Subject headings
- NATURVETENSKAP -- Fysik -- Acceleratorfysik och instrumentering (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Accelerator Physics and Instrumentation (hsv//eng)
- NATURVETENSKAP -- Fysik -- Atom- och molekylfysik och optik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Atom and Molecular Physics and Optics (hsv//eng)
Publication and Content Type
- ref (subject category)
- art (subject category)
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- By the author/editor
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Khan, Shaukat
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Perosa, Giovanni
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Sottocorona, Fil ...
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Brynes, Alexande ...
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De Ninno, Giovan ...
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Penco, Giuseppe
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Ribi, Primo z Re ...
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Spampinati, Simo ...
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Spezzani, Carlo
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Trove, Mauro
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Giannessi, Luca
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Allaria, Enrico
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Schneidmiller, E ...
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Ferrari, Eugenio
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- About the subject
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- NATURAL SCIENCES
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NATURAL SCIENCES
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and Physical Science ...
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and Accelerator Phys ...
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- NATURAL SCIENCES
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NATURAL SCIENCES
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and Physical Science ...
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and Atom and Molecul ...
- Articles in the publication
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Physical Review ...
- By the university
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Uppsala University