2008
DOI: 10.1103/physrevlett.100.105006
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Observation of Synchrotron Radiation from Electrons Accelerated in a Petawatt-Laser-Generated Plasma Cavity

Abstract: The dynamics of plasma electrons in the focus of a petawatt laser beam are studied via measurements of their x-ray synchrotron radiation. With increasing laser intensity, a forward directed beam of x-rays extending to 50 keV is observed. The measured x-rays are well described in the synchrotron asymptotic limit of electrons oscillating in a plasma channel. The critical energy of the measured synchrotron spectrum is found to scale as the maxwellian temperature of the simultaneously measured electron spectra. At… Show more

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Cited by 203 publications
(142 citation statements)
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“…peak brightness than previous laser-driven betatron sources 6,7 . Furthermore, we demonstrate that the radiation has an appreciable degree of spatial coherence.…”
mentioning
confidence: 91%
See 1 more Smart Citation
“…peak brightness than previous laser-driven betatron sources 6,7 . Furthermore, we demonstrate that the radiation has an appreciable degree of spatial coherence.…”
mentioning
confidence: 91%
“…3a) with an X-ray CCD (charge-coupled device) detector 7 . Assuming the spectrum is synchrotron-like, the measured E crit is (29 ± 13) keV for n e = (1.0 ± 0.4) × 10 19 cm −3 , and the 5 mm nozzle (see Fig.…”
mentioning
confidence: 99%
“…The fields E and B are superpositions of the fields of the wave [Eqs. (2) and (3)] and the fields of the channel [Eqs. (4) and (5)].…”
Section: Basic Modelmentioning
confidence: 99%
“…Figure 5(d) shows the X-ray beam distribution produced in a capillary tube of length 20 mm and diameter 200 µm, n e = 7 × 10 18 cm −3 , and a different set of filters (a base of 6 µm mylar and 3 µm Al, with a 3 µm thick vertical stripe of Al and a 3 µm thick horizontal stripe of Sn). Assuming a synchrotron-like spectrum, using the tabulated transmission data of the filters and known CCD sensitivity, an estimate of the critical energy E c = 1.3 keV was deduced using a leastsquares method [15].…”
Section: X-raysmentioning
confidence: 99%