Compact Design of Nomarski Interferometer and its Applicationin Diagnostics of Coulomb Explosions of Deuterium Clusters

Kalal, M.; Slezák, Ondřej; Martinkova, Michaela; Rhee, Yong Joo

doi:10.3938/jkps.56.287

Cited by 18 publications

(15 citation statements)

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“…Park, 7000 East Avenue, Livermore, CA 94550, USA. Email: park29@llnl.gov Optical interferometry is the most widely used technique to measure the plasma electron density in magnetic confinement plasma experiments [10,11] and laser plasma experiments [12][13][14][15][16][17][18] . Also, much effort was put in to devise and improve fringe analysis methods [19][20][21][22][23] and Abel inversion techniques [24][25][26][27] .…”

Section: Introductionmentioning

confidence: 99%

The implementation and data analysis of an interferometer for intense short pulse laser experiments

Park

Baldis

Chen

2016

High Pow Laser Sci Eng

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We present an interferometry setup and the detailed fringe analysis method for intense short pulse (SP) laser experiments. The interferometry scheme was refined through multiple campaigns to investigate the effects of pre-plasmas on energetic electrons at the Jupiter Laser Facility at Lawrence Livermore National Laboratory. The interferometer used a frequency doubled (λ = 0.527 µm) 0.5 ps long optical probe beam to measure the pre-plasma density, an invaluable parameter to better understand how varying pre-plasma conditions affect the characteristics of the energetic electrons. The hardware of the diagnostic, data analysis and example data are presented. The diagnostic setup and the analysis procedure can be employed for any other SP laser experiments and interferograms, respectively.

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Section: Introductionmentioning

confidence: 99%

The implementation and data analysis of an interferometer for intense short pulse laser experiments

Park

Baldis

Chen

2016

High Pow Laser Sci Eng

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“…Neutral gas and plasma profiles were probed with λ=650 nm, 130 fs pulses from an OPA synchronized with the λ=3.9μm pulses, and imaged by an f/2 achromatic lens telescope to a compact Nomarski interferometer [14]. A LANEX scintillating screen, located 7.5 cm beyond the gas jet and shielded from laser exposure by 100 μm thick aluminum foil, was imaged to a low noise CCD camera to capture full electron beam profiles ( Fig.…”

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confidence: 99%

Laser wakefield acceleration with mid-IR laser pulses

et al. 2018

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We report on, to the best of our knowledge, the first results of laser plasma wakefield acceleration driven by ultrashort mid-infrared (IR) laser pulses (λ=3.9 μm, 100 fs, 0.25 TW), which enable near- and above-critical density interactions with moderate-density gas jets. Relativistic electron acceleration up to ∼12 MeV occurs when the jet width exceeds the threshold scale length for relativistic self-focusing. We present scaling trends in the accelerated beam profiles, charge, and spectra, which are supported by particle-in-cell simulations and time-resolved images of the interaction. For similarly scaled conditions, we observe significant increases in the accelerated charge, compared to previous experiments with near-infrared (λ=800 nm) pulses.

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“…I Standard Nomarski interferometer, where the two interfering beams are separated by means of a Wollaston beam splitter and interference is recorded after a polarizer [28][29][30] .…”

Section: Nomarski-type Interferometersmentioning

confidence: 99%

Optical diagnostics for density measurement in high-quality laser-plasma electron accelerators

Brandi

Gizzi

2019

High Pow Laser Sci Eng

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Implementation of laser-plasma-based acceleration stages in user-oriented facilities requires the definition and deployment of appropriate diagnostic methodologies to monitor and control the acceleration process. An overview is given here of optical diagnostics for density measurement in laser-plasma acceleration stages, with emphasis on well-established and easily implemented approaches. Diagnostics for both neutral gas and free-electron number density are considered, highlighting real-time measurement capabilities. Optical interferometry, in its various configurations, from standard two-arm to more advanced common-path designs, is discussed, along with spectroscopic techniques such as Stark broadening and Raman scattering. A critical analysis of the diagnostics presented is given concerning their implementation in laser-plasma acceleration stages for the production of high-quality GeV electron bunches.

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Compact Design of Nomarski Interferometer and its Applicationin Diagnostics of Coulomb Explosions of Deuterium Clusters

Cited by 18 publications

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The implementation and data analysis of an interferometer for intense short pulse laser experiments

The implementation and data analysis of an interferometer for intense short pulse laser experiments

Laser wakefield acceleration with mid-IR laser pulses

Optical diagnostics for density measurement in high-quality laser-plasma electron accelerators

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