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Interactions between short laser pulses and electron bunches determine a wide range of accelerator applications. Finding spatiotemporal overlap between few-micron-sized optical and electron beams is critical, yet there are few routine diagnostics for this purpose. We present a method for achieving spatiotemporal overlap between a picosecond laser pulse and a relativistic sub-ps electron bunch. The method uses the transient change in optical transmission of a Ce:YAG screen upon irradiation with a short electron bunch to co-time the electron and laser beams. We demonstrate and quantify the performance of this method using an inverse Compton source comprised of a 30 MeV electron beam from an X-band linac focused to a 10 μm spot, overlapped with a joule-class picosecond Yb:YAG laser system. This method is applicable to electron beams with few-microjoule bunch energies and uses standard scintillator screens common in electron accelerators.
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Efficient Time-Dependent Method for Strong-Field Ionization of Atoms with Smoothly Varying Radial Steps
We present an efficient numerical method to solve the time-dependent Schrödinger equation in the single-active electron picture for atoms interacting with intense optical laser fields. Our approach is based on a non-uniform radial grid with smoothly increasing steps for the electron distance from the residual ion. We study the accuracy and efficiency of the method, as well as its applicability to investigate strong-field ionization phenomena, the process of high-order harmonic generation, and the dynamics of highly excited Rydberg states.
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- PAR ID:
- 10527963
- Publisher / Repository:
- MDPI
- Date Published:
- Journal Name:
- Atoms
- Volume:
- 12
- Issue:
- 7
- ISSN:
- 2218-2004
- Page Range / eLocation ID:
- 34
- Format(s):
- Medium: X
- Sponsoring Org:
- National Science Foundation
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- Free Publicly Accessible Full Text
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Accepted Manuscript
- Journal Article:
- https://doi.org/10.3390/atoms12070034
