Mr. Vincent Pitre Profile

Vincent Pitre

at INRS-Energie et Materiaux

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Proceedings Article | 29 August 2017 Paper

Characterization of a new subpicosecond x-ray streak camera

Vincent Pitre

Proceedings Volume 10313, 1031305 (2017) https://doi.org/10.1117/12.2283801

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In order to study ultrashort laser-produced plasmas, we developped at INRS a subpicosecond x-ray streak camera, called the PX1. The PX1 has been completely characterized.' Using an extraction field of 250 kV/cm, a record 350 fs temporal resolution has been measured with x-ray pulses in the KeV range. Also, we obtained a 40 tim spatial resolution along the 15 mm slit of the photocathode in single-shot. The PX1 has also been used in accumulation mode and a temporal resolution of 800 fs has been obtained with unlimited dynamic range. Recently, in an effort to improve upon these results, a new x-ray streak camera has been developped and tested. This camera, called the FX, uses the new generation of bilamellar tube technology. This includes a better control of the paraxial trajectories, a larger quadripolar lense to increase the usable width of the photocathode and a new design of the electronic lenses to permit the use of higher voltages.

Proceedings Article | 28 January 2004 Paper

Characterization of the new FX1 x-ray streak camera

Vincent Pitre, Sebastien Magnan, Jean-Claude Kieffer, Fabien Dorchies, Francois Salin, Catherine Goulmy, Jean-Claude Rebuffie

Proceedings Volume 5194, (2004) https://doi.org/10.1117/12.503581

KEYWORDS: Cameras, Streak cameras, Temporal resolution, X-rays, Ultraviolet radiation, Picosecond phenomena, Switches, X-ray sources, X-ray characterization, Imaging systems

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We present the characterization of an ultrafast x-ray streak camera based on a new bilamellar x-ray tube. This camera, named FX1, has been tested in static (imaging) and dynamic (sweep) mode with several continuous and pulsed sub-picosecond UV and X-ray sources. The FX1 camera was designed to overcome some limitations observed with the PX1 camera which has been used previously at INRS to achieve high resolution sub-picosecond time resolved spectroscopy of ultrafast laser produced plasmas. Line Spread Function measurements indicated a strong improvement of the static image contribution to the temporal resolution compared to the PX1 camera performances [Rev. Sci. Instr. 71, 3627, 2000]. Furthermore a much higher dc extraction field can now be sustained at the photocathode-acceleration slit region. The FX1 camera has been successfully operated in various experimental conditions. An upper limit of the temporal response of the FX1 has been measured in the keV x-ray range in single shot mode with a laser-based x-ray source (2keV) having a duration (FWHM) of 1.4 ps. The FX1 camera has also been coupled to photoconductive switches and testesd in accumulation mode [Rev. Sci. Instr. 73, 1617, 2002] with VUV light produced with the 1 kHz Ti:sapphire laser of the CELIA. A newly assembled test-bench is now currently used at INRS for the characterisation of streak cameras in both single-shot and accumulation mode with the 10Hz Ti:sapphire laser of INRS.

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