Erlangen 2026 – scientific programme
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MP: Fachverband Theoretische und Mathematische Grundlagen der Physik
MP 10: Strong Fields
MP 10.6: Talk
Thursday, March 19, 2026, 15:00–15:15, KH 02.013
Comparative analysis of laser chirping schemes for compensation of ponderomotive broadening in high-intensity Compton sources — •Nikita Larin1,2 and Daniel Seipt1,2 — 1Helmholtz Institute Jena, Fröbelstieg 3, 07743 Jena, Germany — 2GSI Helmholtzzentrum für Schwerionenforschung GmbH, Planckstraße 1, 64291 Darmstadt, Germany
Inverse Compton scattering (ICS) is a well-established source of X-ray and γ-ray radiation with broad applications in medicine, biology, nuclear, and material sciences. A key advantage of ICS sources is their ability to generate photon beams with high spectral brightness.
However, achieving the necessary large photon yield requires operation at relativistic laser intensities, which introduces ponderomotive broadening. This effect directly limits the desired spectral brightness. To mitigate this constraint and enhance the performance of ICS sources, the use of chirped laser pulses has been proposed as a compensation strategy [1-4].
We present a comparative study of various chirping prescriptions by applying a novel time-frequency analysis method to the nonlinear Compton emission process. This approach provides deeper insights into the effectiveness of the different chirping prescriptions and guides further refinements toward creating narrowband X-ray and γ-ray sources based on ICS.
[1] I. Ghebregziabher et al., PRSTAB 16, 030705 (2013). [2] B. Terzić et al., PRL 112, 074801 (2014). [3] V. Kharin et al., PRL 120, 044802 (2018). [4] D. Seipt et al., PRL 122, 204802 (2019).
Keywords: Strong fields; Inverse Compton scattering; High-intensity laser