Miro Y Shverdin

Miro Y Shverdin
AOSense, Inc.

Doctor of Philosophy

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83
Publications
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Introduction
Skills and Expertise

Publications

Publications (83)
Article
Full-text available
The influence of an external test mass on the phase of the signal of an atom interferometer is studied theoretically. Using traditional techniques in atom optics based on the density matrix equations in the Wigner representation, we are able to extract the various contributions to the phase of the signal associated with the classical motion of the...
Article
The rf photoinjector and linear accelerator in the Mono-Energetic Gamma-ray (MEGa-ray) facility at LLNL is presented. This machine uses 11.4 GHz rf technology to accelerate a high-brightness electron beam up to 250 MeV to produce MeV γ-raysγ-rays through Compton scattering with a Joule-class laser pulse. Compton scattering-based generation of high...
Article
Full-text available
In order to achieve the highest intensities possible with the short-pulse Advanced Radiographic Capability beamline at the National Ignition Facility (NIF), it will be necessary to phase the individual ARC apertures. This is made especially challenging because the design of ARC results in two laser beams with different dispersions sharing the same...
Article
Full-text available
Continued progress in accelerator physics and laser technology have enabled the development of a new class of tunable x-ray and gamma-ray light sources based on Compton scattering between a high-brightness, relativistic electron beam and a high intensity laser pulse produced via chirped-pulse amplification (CPA). A precision, tunable, monochromatic...
Article
The design and optimization of a Mono-Energetic Gamma-Ray (MEGa-Ray) Compton scattering source are presented. A new precision source with up to 2.5 MeV photon energies, enabled by state of the art laser and x-band linac technologies, is currently being built at LLNL. Various aspects of the theoretical design, including dose and brightness optimizat...
Article
We report the design and current status of a monoenergetic laser‐based Compton scattering 0.5–2.5 MeV γ‐ray source. Previous nuclear resonance fluorescence results and future linac and laser developments for the source are presented.
Article
A precision, tunable, monochromatic (=-rays in the 0.5-2.5 MeV photon energy range. This >=-ray source will be used to excite nuclear resonance fluorescence (NRF) in various isotopes, of interest for homeland security, stockpile science and surveillance, nuclear fuel assay, and waste imaging and assay. The source current status will be discussed, a...
Article
We describe laser systems designed for the next generation Mono-Energetic Gamma-Ray (MEGa-ray) Compton scattering light source at LLNL. An 80 fs Yb:doped fiber oscillator seeds a photogun drive laser (PDL) and a high energy interaction system laser (ILS). Utilizing chirped pulse amplification (CPA) in fiber, the PDL will generate 80 muJ, spatially...
Conference Paper
Energetic short-pulse fiber lasers feed or drive many applications at LLNL, including petawatt lasers and Compton-scattered gamma-ray sources. We present challenges and advances in scaling fiber lasers to the millijoule range.
Article
Full-text available
We are converting a quad of NIF beamlines into eight, short-pulse (1–50 ps), petawatt-class beams for advanced radiography and fast ignition experiments. This paper describes progress toward completing this project.
Article
Full-text available
We have characterized the Advanced Radiographic Capability injection laser system and demonstrated that it meets performance requirements for upcoming National Ignition Facility fusion experiments. Pulse compression was achieved with a scaled down replica of the meter-scale grating ARC compressor and sub-ps pulse duration was demonstrated at the Jo...
Article
Full-text available
A monoenergetic gamma-ray (MEGa-ray) source based on Compton scattering, targeting nuclear physics applications such as nuclear resonance fluorescence, has been constructed and commissioned at Lawrence Livermore National Laboratory. In this paper, the overall architecture of the system, as well as some of the design decisions (such as laser pulse l...
Article
Full-text available
We demonstrate a compact hyperdispersion stretcher and compressor pair that permit chirped-pulse amplification in Nd:YAG. We generate 750 mJ, 0.2 nm FWHM, 10 Hz pulses recompressed to an 8 ps near-transform-limited duration. The dispersion-matched pulse compressor and stretcher impart a chirp of 7300 ps/nm, in a 3 m x 1 m footprint.
Article
Full-text available
We present a detailed theoretical investigation of cladding-pumped Raman fiber amplification in an unexplored parameter space of high conversion efficiency (> 60%) and high brightness enhancement (> 1000). Fibers with large clad-to-core diameter ratios can provide a promising means for Raman-based brightness enhancement of diode pump sources. Unfor...
Article
Full-text available
A high peak brilliance, laser-based Compton-scattering -ray source, capable of producing quasimo-noenergetic photons with energies ranging from 0.1 to 0.9 MeV has been recently developed and used to perform nuclear resonance fluorescence (NRF) experiments. Techniques for characterization of -ray beam parameters are presented. The key source paramet...
Article
Full-text available
We demonstrate a nonlinear crystal-based short pulse recirculation cavity for trapping the second harmonic of an incident high-power laser pulse. This scheme aims to increase the efficiency and flux of Compton-scattering-based light sources. We demonstrate up to 40x average power enhancement of frequency-doubled submillijoule picosecond pulses, and...
Conference Paper
The fundamental power scaling limits for diffraction limited fiber lasers are reviewed. Relationships between the limits show there is an upper bound for single aperture power of conventional fiber lasers of 10-40 kW.
Article
Full-text available
What we believe to be the first demonstration of isotope-specific detection of a low-Z and low density object shielded by a high-Z and high-density material using monoenergetic gamma rays is reported. The isotope-specific detection of LiH shielded by Pb and Al is accomplished using the nuclear resonance fluorescence line of L7i at 478 keV. Resonant...
Conference Paper
Full-text available
We report the design and current status of a monoenergetic laser-based Compton scattering 0.5-2.5 MeV γ-ray source. Previous nuclear resonance fluorescence results and future linac and laser developments for the source are presented.
Article
Generation of mono-energetic, high brightness gamma-rays requires state of the art lasers to both produce a low emittance electron beam in the linac and high intensity, narrow linewidth laser photons for scattering with the relativistic electrons. Here, we overview the laser systems for the rd generation Monoenergetic Gamma-ray Source (MEGa-ray) cu...
Article
Advanced Radiographic Capability (ARC) project at the National Ignition Facility (NIF) is designed to produce energetic, ultrafast x-rays in the range of 70-100 keV for backlighting NIF targets. The chirped pulse amplification (CPA) laser system will deliver kilo-Joule pulses at an adjustable pulse duration from 1 ps to 50 ps. System complexity req...
Article
Full-text available
Recent progress in accelerator physics and laser technology have enabled the development of a new class of tunable gamma-ray light sources based on Compton scattering between a high-brightness, relativistic electron beam and a high intensity laser pulse produced via chirped-pulse amplification (CPA). A precision, tunable Mono-Energetic Gamma-ray (M...
Article
We describe compact laser technology for Mono-Energetic Gamma-Ray (MEGa-Ray) Compton scattering light source at LLNL. The high energy, 120W interaction laser utilizes chirped pulse amplification (CPA) in Nd:YAG to amplify a sub-nanometer bandwidth 20 muJ pulses from a fiber system to 1J. A novel pulse stretcher provides a dispersion of over 7000ps/...
Article
Properties of a Mono-Energetic Gamma-Ray (MEGa-Ray) Compton scattering source are presented. It produces 0.1 MeV-0.9 MeV photons. Its experimental key parameters are: its size (0.01 mm^2), divergence (10x6 mrad^2), duration (ps), spectrum (15% bandwidth) and intensity (10^5 photons/shot), which yield an on-axis peak brightness of ˜10^15 photons/mm^...
Article
A precision, tunable gamma-ray source driven by a compact, high-gradient X-band linac is currently under development at LLNL. High-brightness, relativistic electron bunches produced by the linac interact with a Joule-class, 10 ps laser pulse to generate tunable gamma-rays in the 0.5-2.5 MeV photon energy range via Compton scattering. The source wil...
Conference Paper
We describe a novel laser system used in a Compton-scattering based monoenergetic gamma-ray source, commissioned at LLNL. This system consists of a UV laser for electron production and a high power CPA based scattering laser.
Conference Paper
We report detailed spectral and spatial characterization of a 0.1-MeV-0.8 MeV tunable ultra-bright laser-based Compton scattering source. Nuclear Resonance Fluorescence experiments with the source are also presented.
Article
Full-text available
Dispersion balancing in complex high-intensity laser systems is critical for the temporal pulse fidelity. We demonstrate a method for dispersion management of the eight-beam Petawatt Advanced Radiographic Capability Laser utilizing the phase shift technique.
Conference Paper
Full-text available
Recent progress in accelerator physics and laser technology have enabled the development of a new class of gamma-ray light sources based on Compton scattering between a high-brightness, relativistic electron beam and a high intensity laser pulse produced via chirped-pulse amplification (CPA). A precision, tunable gamma-ray source driven by a compac...
Conference Paper
Full-text available
A precision, tunable gamma-ray source driven by a compact, high-gradient X-band linac is currently under development at LLNL. High-brightness, relativistic electron bunches produced by the linac interact with a Joule-class, 10 ps laser pulse to generate tunable -rays in the 0.5-2.5 MeV photon energy range via Compton scattering. The source will be...
Article
Recently a Compton-scattering based gamma-ray source, in which a high-intensity laser scatters off a high-brightness electron beam and emerges as a narrow-band gamma-ray beam, has been commissioned at Lawrence Livermore National Laboratory. Operating at energies from 0.1 to 0.9 MeV, the source produces fluxes upwards of 10^6 photons/sec with a brig...
Article
A Compton scattering γ-ray source, capable of producing photons with energies ranging from 0.1 MeV to 0.9 MeV has been commissioned and characterized, and then used to perform nuclear resonance fluorescence (NRF) experiments. The key source parameters are the size (0.01 mm²), horizontal and vertical divergence (6 x 10 mrad²), duration (10 ps), s...
Article
In the next generation of linear colliders, inverse Compton scattering (ICS) of intense laser pulses on relativistic electron bunches will enable a mode of operation based on energetic γe and γγ collisions, with a significant complementary scientific potential. The efficiency of γ-ray generation via ICS is constrained by the Thomson scattering cros...
Conference Paper
The fundamental power scaling limits for diffraction limited fiber lasers are reviewed. Relationships between the limits show there is an upper bound for single aperture power of conventional fiber lasers of 10-40 kW.
Article
Full-text available
We analyze the scalability of diffraction-limited fiber lasers considering thermal, non-linear, damage and pump coupling limits as well as fiber mode field diameter (MFD) restrictions. We derive new general relationships based upon practical considerations. Our analysis shows that if the fiber's MFD could be increased arbitrarily, 36 kW of power co...
Article
We report first light from a novel, new source of 10-ps 0.776-MeV gamma-ray pulses known as T-REX (Thomson-Radiated Extreme X-rays). The MeV-class radiation produced by TREX is unique in the world with respect to its brightness, spectral purity, tunability, pulse duration and laser-like beam character. With T-REX, one can use photons to efficiently...
Article
The phase-shift technique for measuring group-delay has novel applications for aligning and commissioning grating compressors and balancing dispersion in large, high-energy petawatt and other complex, chirped-pulse amplifier systems.
Article
Full-text available
The average power and efficiency of processes that exhibit low interaction cross section and low optical loss can often be enhanced by recirculating the laser pulse in the cavity. Inverse Compton scattering of the photon pulse on an electron bunch, harmonic generation, and spectroscopy represent examples of such processes. Methods for laser recircu...
Conference Paper
Full-text available
The phase-shift technique for measuring group-delay has novel applications for aligning and commissioning grating compressors and balancing dispersion in large, high-energy petawatt and other complex, chirped-pulse amplifier systems.
Article
We demonstrate coherent control of a molecular modulation process using an incident set of seven optical sidebands spanning two octaves of bandwidth. We utilize a genetic algorithm to optimize the relative phases of the incident sidebands to generate additional UV sidebands with nearly 1% efficiency, change the ratio of energy between sidebands by...
Conference Paper
We designed and constructed a nonlinear crystal-based short pulse recirculation cavity that traps the second harmonic of an incident high power laser. This scheme aims to increase the efficiency of Compton-scattering based light sources.
Conference Paper
Full-text available
The fiber-based, spatially and temporally shaped, picosecond UV laser system described here has been specifically designed for advanced rf gun applications, with a special emphasis on the production of high-brightness electron beams for free-electron lasers and Compton scattering light sources. The laser pulse can be shaped to a flat-top in both sp...
Conference Paper
Full-text available
Compton scattering of intense laser pulses with ultra- relativistic electron beams has proven to be an attractive source of high-brightness x-rays with keV to MeV energies. This type of x-ray source requires the electron beam brightness to be comparable with that used in x-ray free- electron lasers and laser and plasma based advanced accelerators....
Conference Paper
Thomson-scattering based systems offer a path to high-brightness high-energy (> 1 MeV) X-ray and gamma-ray sources due to their favorable scaling with electron energy. LLNL is currently engaged in an effort to optimize such a device, dubbed the "Thomson-Radiated Extreme X-ray" (T-REX) source, targeting up to 680 keV photon energy. Such a system req...
Conference Paper
Full-text available
Frequency upconversion of laser-generated photons by inverse Compton scattering for applications such as nuclear spectroscopy and gamma-gamma collider concepts on the future ILC would benefit from an increase of average source brightness. The primary obstacle to higher average brightness is the relatively small Thomson scattering cross section. It...
Conference Paper
Full-text available
A new class of tunable, monochromatic λ-ray sources capable of operating at high peak and average brightness is currently being developed at LLNL for nuclear photo-science and applications. These novel systems are based on Compton scattering of laser photons by a high brightness relativistic electron beam produced by an rf photoinjector. A prototyp...
Article
Inverse Compton scattering (ICS) of high-power laser pulses on relativistic electron bunches represents an attractive method for high-brightness, quasi-monoenergetic γ-ray production. The efficiency of γ-ray generation via ICS is severely constrained by the small Thomson scattering cross-section. Furthermore, repetition rates of high-energy short-p...
Conference Paper
Full-text available
A novel high-dynamic-range cross-correlator is presented that enables single-shot characterization of pulse contrast for ultrahigh intensity lasers in the temporal region up to 200 ps.
Article
Gamma-ray generation by Compton back-scattering laser photons off a relativistic electron beam suffers from a small Thomson cross-section. Recirculating unused laser photons can increase the average gamma-ray flux. Traditional approaches to laser recirculation rely on either resonant coupling of a low-energy pulse train to a cavity or active pulse...
Article
Tunable, monochromatic gamma-ray sources are currently being developed at LLNL for nuclear photo-science and related applications. These novel systems are based on Compton scattering of laser photons by a high brightness relativistic electron beam produced by an rf photoinjector and offer a path to high-brightness high-energy (> 1 MeV) x-ray & gamm...
Article
A fully relativistic, three-dimensional code, tracking multiple electrons interacting with the electromagnetic field distribution of an intense laser pulse propagating paraxially in vacuum, has been developed to predict their radiation characteristics, within the context of classical Thomson scattering (no recoil). A 4^th-order Runge-Kutta algorith...
Article
Compton scattering is studied theoretically both in the time and frequency-domain, using the Lorentz-boosted Klein-Nishina cross-section for unpolarized electrons. Both spatially and temporally Fourier transform-limited and chirped laser pulses are considered, as well as higher-order Hermite-Gaussian modes. Laser propagation is realistically modele...
Conference Paper
The interaction of intense laser light with relativistic electrons can produce unique sources of high-energy x rays and gamma rays via Thomson scattering. ''Thomson-Radiated Extreme X-ray'' (T-REX) sources with peak photon brightness (photons per unit time per unit bandwidth per unit solid angle per unit area) that exceed that available from world'...
Conference Paper
Applications accessed by high energy petawatt (HEPW) lasers require complete, single-shot characterization of pulse spatial, temporal, and energy characteristics. We describe techniques that enable single-shot characterization of the temporal shape and pulse contrast of HEPW pulses with >10{sup 8} dynamic range over a ns-temporal window. Approaches...
Article
Full-text available
We demonstrate coherent control of laser-induced optical breakdown in Ar and Xe with a femtosecond time-scale pulse train. By using a genetic algorithm to set the relative phases of seven optical sidebands that span two octaves of bandwidth, we enhance or suppress the probability of breakdown, vary the onset time of the spark, and to some extent, v...
Conference Paper
Full-text available
Recent advances in high brightness rf gun technology, coupled with novel laser systems and architecture have enabled the development of a new class of compact, tunable, monochromatic light sources capable of producing MeV photons with unprecedented brightness. Such new sources rely on Thomson scattering of incident photons produced by a TW-class la...
Article
Compton-Scattering based systems offer a path to high-brightness high-energy (> 1 MeV) x-ray & gamma-ray sources due to their favorable scaling with electron energy. LLNL is currently engaged in an effort to build such a device, dubbed the ``Thomson-Radiated Extreme X-Ray'' (T-REX) source. Presented here is an overview of the system design, which i...
Article
We use coherent control of four-wave-mixing as a diagnostic and describe the generation of a periodic optical waveform where the spectrum is sufficiently broad that the envelope is approximately a single cycle in length.
Article
Full-text available
Following the experiments of Shverdin and colleagues [Phys. Rev. Lett. 94, 033904 (2005)], we describe a technique for determining the temporal envelope of an optical beam whose spectrum consists of η discrete, equally spaced frequency components. Four-wave mixing is employed to generate η - 1 higher-frequency sidebands. The relative intensities of...
Article
Pulse-shaping experiments with a unique source of laser radiation that spans more than four octaves of bandwidth and that consists of more than 200 discrete frequency components were performed. Phase control was achieved over seven spectral components stretching from 410 nm to 1.56 μm, or two octaves. By changing the relative phases of these seven...
Article
Full-text available
We make use of coherent control of four-wave mixing to the ultraviolet as a diagnostic and describe the generation of a periodic optical waveform where the spectrum is sufficiently broad that the envelope is approximately a single-cycle in length, and where the temporal shape of this envelope may be synthesized by varying the coefficients of a Four...
Article
Full-text available
We have demonstrated that coherent molecular modulation can result in the collinear generation of mutually-coherent spectral sidebands that extend in frequency from the infrared to the far ultraviolet. Our technique is based on adiabatic preparation of a highly coherent molecular superposition-state, which is achieved by using narrow-linewidth lase...
Chapter
By electronically adjusting the phases of seven Raman sidebands which span 1.56 µm to 410 nm we generate a train of well-formed single-cycle optical pulses with a pulsewidth of 1.6 fs.
Conference Paper
The talk will describe the generation of an optical pulse where the spectrum is sufficiently broad that the waveform is a single cycle in length, and where the temporal shape of this waveform may be synthesized. Specifically, we report the generation of a train of single-cycle optical pulses with a pulse width of 1.6 fs, a pulse separation of 11 fs...