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Chen S, Powers ND, Ghebregziabher I, Maharjan CM, Liu C, Golovin G, Banerjee S, Zhang J, Cunningham N, Moorti A, Clarke S, Pozzi S, Umstadter DP. MeV-energy x rays from inverse compton scattering with laser-wakefield accelerated electrons. Phys Rev Lett 2013; 110:155003. [PMID: 25167278 DOI: 10.1103/physrevlett.110.155003] [Citation(s) in RCA: 50] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/21/2012] [Indexed: 06/03/2023]
Abstract
We report the generation of MeV x rays using an undulator and accelerator that are both driven by the same 100-terawatt laser system. The laser pulse driving the accelerator and the scattering laser pulse are independently optimized to generate a high energy electron beam (>200 MeV) and maximize the output x-ray brightness. The total x-ray photon number was measured to be ∼1×10(7), the source size was 5 μm, and the beam divergence angle was ∼10 mrad. The x-ray photon energy, peaked at 1 MeV (reaching up to 4 MeV), exceeds the thresholds of fundamental nuclear processes (e.g., pair production and photodisintegration).
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Affiliation(s)
- S Chen
- Department of Physics and Astronomy, University of Nebraska, Lincoln, Nebraska 68588, USA
| | - N D Powers
- Department of Physics and Astronomy, University of Nebraska, Lincoln, Nebraska 68588, USA
| | - I Ghebregziabher
- Department of Physics and Astronomy, University of Nebraska, Lincoln, Nebraska 68588, USA
| | - C M Maharjan
- Department of Physics and Astronomy, University of Nebraska, Lincoln, Nebraska 68588, USA
| | - C Liu
- Department of Physics and Astronomy, University of Nebraska, Lincoln, Nebraska 68588, USA
| | - G Golovin
- Department of Physics and Astronomy, University of Nebraska, Lincoln, Nebraska 68588, USA
| | - S Banerjee
- Department of Physics and Astronomy, University of Nebraska, Lincoln, Nebraska 68588, USA
| | - J Zhang
- Department of Physics and Astronomy, University of Nebraska, Lincoln, Nebraska 68588, USA
| | - N Cunningham
- Department of Physics and Astronomy, University of Nebraska, Lincoln, Nebraska 68588, USA
| | - A Moorti
- Department of Physics and Astronomy, University of Nebraska, Lincoln, Nebraska 68588, USA
| | - S Clarke
- Department of Nuclear Engineering and Radiological Sciences, University of Michigan, Ann Arbor, Michigan 48109, USA
| | - S Pozzi
- Department of Nuclear Engineering and Radiological Sciences, University of Michigan, Ann Arbor, Michigan 48109, USA
| | - D P Umstadter
- Department of Physics and Astronomy, University of Nebraska, Lincoln, Nebraska 68588, USA
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Alnaser AS, Tong XM, Osipov T, Voss S, Maharjan CM, Ranitovic P, Ulrich B, Shan B, Chang Z, Lin CD, Cocke CL. Routes to control of H2 Coulomb explosion in few-cycle laser pulses. Phys Rev Lett 2004; 93:183202. [PMID: 15525161 DOI: 10.1103/physrevlett.93.183202] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/09/2004] [Indexed: 05/24/2023]
Abstract
We have measured coincident ion pairs produced in the Coulomb explosion of H2 by 8-30 fs laser pulses at different laser intensities. We show how the Coulomb explosion of H2 can be experimentally controlled by tuning the appropriate pulse duration and laser intensity. For laser pulses less than 15 fs, we found that the rescattering-induced Coulomb explosion is dominated by first-return recollisions, while for longer pulses and at the proper laser intensity, the third return can be made to be the major one. Additionally, by choosing suitable pulse duration and laser intensity, we show H2 Coulomb explosion proceeding through three distinct processes that are simultaneously observable, each exhibiting different characteristics and revealing distinctive time information about the H2 evolution in the laser pulse.
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Affiliation(s)
- A S Alnaser
- J. R. Macdonald Laboratory, Physics Department, Kansas State University, Manhattan, KS 66506-2601, USA
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Alnaser AS, Voss S, Tong XM, Maharjan CM, Ranitovic P, Ulrich B, Osipov T, Shan B, Chang Z, Cocke CL. Effects of molecular structure on ion disintegration patterns in ionization of O2 and N2 by short laser pulses. Phys Rev Lett 2004; 93:113003. [PMID: 15447336 DOI: 10.1103/physrevlett.93.113003] [Citation(s) in RCA: 42] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/19/2004] [Indexed: 05/24/2023]
Abstract
We demonstrate that the structure of the outermost orbitals of oxygen and nitrogen can be observed in the angular distribution of coincident ion pairs generated by the double ionization of these molecules by 8 fs laser pulses. We do this by establishing that these ions emerge from well defined excited electronic states of O2+2 and N2+2 respectively and that they are produced dominantly through a process which involves electron rescattering. The angular distributions of the ions from the two targets are very different, reflecting the different structures of the outermost orbitals of the two molecules.
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Affiliation(s)
- A S Alnaser
- J. R. Macdonald Laboratory, Physics Department, Kansas State University, Manhattan, Kansas 66506-2601, USA
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