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Metrology of high-order harmonics for free-electron laser seeding
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- Erny, Christian (author)
- Lund University,Lunds universitet,Atomfysik,Fysiska institutionen,Institutioner vid LTH,Lunds Tekniska Högskola,Atomic Physics,Department of Physics,Departments at LTH,Faculty of Engineering, LTH
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- Mansten, Erik (author)
- Lund University,Lunds universitet,MAX IV-laboratoriet,Atomfysik,Fysiska institutionen,Institutioner vid LTH,Lunds Tekniska Högskola,MAX IV Laboratory,Atomic Physics,Department of Physics,Departments at LTH,Faculty of Engineering, LTH
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- Gisselbrecht, Mathieu (author)
- Lund University,Lunds universitet,Synkrotronljusfysik,Fysiska institutionen,Institutioner vid LTH,Lunds Tekniska Högskola,Synchrotron Radiation Research,Department of Physics,Departments at LTH,Faculty of Engineering, LTH
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- (creator_code:org_t)
- 2011-07-26
- 2011
- English.
- In: New Journal of Physics. - : IOP Publishing. - 1367-2630. ; 13
- Journal article (peer-reviewed)
Abstract
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- We examine the characteristics of high-order harmonics generated with 800 nm, 25 mJ, 160 fs laser pulses in an Ar gas cell with the objective of seeding a free electron laser. We measure the energy per pulse and per harmonic, the energy jitter, the divergence and the position stability of the harmonic beam. We perform ab initio numerical simulations based on integration of the time-dependent Schrodinger equation and of the wave equation within the slowly varying envelope approximation. The results reproduce the experimental measurements to better than a factor of two. The interaction of a frequency comb of harmonic fields with an electron bunch in an undulator is examined with a simple model consisting of calculating the energy modulation owing to the seed-electron interaction. The model indicates that the undulator acts as a spectral filter selecting a given harmonic.
Subject headings
- NATURVETENSKAP -- Fysik -- Atom- och molekylfysik och optik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Atom and Molecular Physics and Optics (hsv//eng)
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- ref (subject category)
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- Erny, Christian
- Mansten, Erik
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- Schwenke, Jörg
- Rakowski, Rafal
- He, Xinkui
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- Gaarde, Mette
- Werin, Sverker
- L'Huillier, Anne
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