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Tjnaf Free Electron Laser Damage Studies
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Book Synopsis TJNAF Free Electron Laser Damage Studies by :
Download or read book TJNAF Free Electron Laser Damage Studies written by and published by . This book was released on 2001 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Laser material damage experiments were conducted at the Thomas Jefferson National Accelerator Facility (TJNAF) free electron laser (FEL) user laboratorywith an average power of 100W and a power density of 104W/cm2. The FEL beam bombards the target with a steady stream of tens of millions of pulses persecond each containing 50MW of power in a short burst of ~1ps. No conventional laser combines these characteristics, and no experiments have previouslybeen done to explore the effects of the FEL pulse. The goal is to develop scaling laws to accurately describe large-scale damage from a MW FEL usingsmall-scale experiments.
Book Synopsis Experimental Damage Studies for a Free Electron Laser Weapon by :
Download or read book Experimental Damage Studies for a Free Electron Laser Weapon written by and published by . This book was released on 1999 with total page 59 pages. Available in PDF, EPUB and Kindle. Book excerpt: Laser material damage experiments for this thesis were the first ever conducted at the new DoE Thomas Jefferson National Accelerator Facility (TJNAF) free electron laser (FEL) user laboratory. In the past only large-scale laser experiments were thought to properly model weapons applications. Experimental procedures developed in this thesis allowed a scaled-down laser of a few hundred Watts to characterize the damage from a weapon-scale one million Watt laser. The TJNAF FEL has the power of a microwave oven concentrated into a beam the size of a pencil lead. The unique TJNAF FEL beam bombards the target with a steady stream of tens of millions of pulses per second each containing 50 million Watts of power in a short burst of 4 x 10(exp -13) seconds. No other laser combines these characteristics, and no experiments have previously been done to explore the effects of the FEL pulse. Target materials were obtained from the Naval Research Laboratory (NRL) and from Naval Surface Warfare Division (NSWD) Port Hueneme. Data were collected and analyzed using video cameras, optical microscopes and a scanning electron microscope (SEM). This thesis has been a productive cooperation among NPS, TJNAF, NRL, and NSWD Port Hueneme, to the benefit of DoD.
Book Synopsis Simulations of the TJNAF Free Electron Laser with a Negative Taper and Laser Damage Studies by : Adamantios Christodoulou
Download or read book Simulations of the TJNAF Free Electron Laser with a Negative Taper and Laser Damage Studies written by Adamantios Christodoulou and published by . This book was released on 2000-12-01 with total page 111 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Free Electron Laser (FEL) is a candidate for a future close-in weapon system that will provide a longer protective range for missile destruction. The FEL is also tunable to wavelengths that would give good atmospheric transmission and optimal target absorption characteristics at the target. This thesis describes single-mode and multimode simulation results of the Thomas Jefferson National Accelerator Facility (TJNAF) FEL operating at far infrared wavelengths. The TJNAF FEL uses inverse tapering and is driven by 34.5 MeV and 47.5 MeV energy electron pulses. Steady-state power, weak-field steady state gain, electron beam energy spread and optical spectrum widths were explored as a function of the desyncinonism and tapering rate. The simulations described FEL pulse evolution and short pulse effects. The simulation results have been presented at an International Conference held at Duke University, Durham, NC in August 2000. in addition, the results of damage to Slip-cast Fused Silica samples by the TJNAF FEL, with and without the effect of airflow are analyzed. A comparison with older damage experiments was done in order to develop scaling rules in the future.
Book Synopsis Damage Produced by the Free Electron Laser by : Lee R. Short
Download or read book Damage Produced by the Free Electron Laser written by Lee R. Short and published by . This book was released on 1999-06-01 with total page 70 pages. Available in PDF, EPUB and Kindle. Book excerpt: The first damage experiments produced by a Free Electron Laser were conducted at the Department of Energy's Thomas Jefferson National Accelerator Facility (TJNAF). In the past, only large scale laser experiments were thought to properly model lasers for weapons applications. Scaled down procedures developed in this thesis allowed the FEL, with a few hundred watts of power, to characterize the damage produced by a megawatt weapon's scale laser. With a power density of 10 kW/cm2, the TJNAF FEL bombards targets with a steady stream of tens of millions of pulses per second. Each pulse contains 50 MW of power in short bursts lasting 4 x 10.14 seconds each. No previous laser experiments have been conducted to explore the effects of the FEL short pulses. Target materials were obtained from the Naval Surface Warfare Center (NSWC), Port Hueneme. Data were collected and analyzed using video cameras and optical microscopes, and irradiated at TJNAF. This thesis was a productive cooperation between NPS, TJNAF, and NSWC Port Hueneme, to the benefit of DOD.
Book Synopsis Experimental Damage Studies for a Free Electron Laser Weapon by : Robert W. Thomson
Download or read book Experimental Damage Studies for a Free Electron Laser Weapon written by Robert W. Thomson and published by . This book was released on 1999 with total page 59 pages. Available in PDF, EPUB and Kindle. Book excerpt: Laser material damage experiments for this thesis were the first ever conducted at the new DoE Thomas Jefferson National Accelerator Facility (TJNAF) free electron laser (FEL) user laboratory. In the past only large-scale laser experiments were thought to properly model weapons applications. Experimental procedures developed in this thesis allowed a scaled-down laser of a few hundred Watts to characterize the damage from a weapon-scale one million Watt laser. The TJNAF FEL has the power of a microwave oven concentrated into a beam the size of a pencil lead. The unique TJNAF FEL beam bombards the target with a steady stream of tens of millions of pulses per second each containing 50 million Watts of power in a short burst of 4 x 10(exp -13) seconds. No other laser combines these characteristics, and no experiments have previously been done to explore the effects of the FEL pulse. Target materials were obtained from the Naval Research Laboratory (NRL) and from Naval Surface Warfare Division (NSWD) Port Hueneme. Data were collected and analyzed using video cameras, optical microscopes and a scanning electron microscope (SEM). This thesis has been a productive cooperation among NPS, TJNAF, NRL, and NSWD Port Hueneme, to the benefit of DoD.
Book Synopsis Free Electron Lasers 2000 by : V.N. Litvinenko
Download or read book Free Electron Lasers 2000 written by V.N. Litvinenko and published by Gulf Professional Publishing. This book was released on 2005-12-27 with total page 790 pages. Available in PDF, EPUB and Kindle. Book excerpt: The 22nd International Free Electron Laser Conference and 7th FEL User Workshop were held August 13-18, 2000 at Washington Duke Inn and Golf Club in Durham, North Carolina, USA. The conference and the workshop were hosted by Duke University's Free Electron laser (FEL) Laboratory. Following tradition, the FEL prize award was announced at the banquet. The year 2000 FEL prize was awarded to three scientists propelling the limits of high power FELs: Steven Benson, Eisuke Minehara and George Neill. The conference program was comprised of traditional oral sessions on First Lasing, FEL theory, storage ring FELs, linac and high power FELs, long wavelength FELs, SASE FELs, accelerator and FEL physics and technology, and new developments and proposals. Two sessions on accelerator and FEL physics and technology reflected the emphasis on the high quality of accelerators and components for modern FELs. The breadth of the applications was presented in the workshop oral sessions on materials processing, biomedical and surgical applications, physics and chemistry as well as on instrumentation and methods for FEL applications. A special oral session was dedicated to FEL center status reports for users to learn more about the opportunities with FELs. As usual, the oral sessions were supplemented by poster sessions with in-depth discussions and communications. The FEL physicists and FEL users had excellent opportunities to interact throughout the duration of the event, culminating a Joint Sessions. The year 2000 was very successful being marked by lasing with two SASE and one storage ring short-wavelength FELs, and by the first human surgery with the use of FEL, to mention but a few. The International Program Committee and chairs of the sessions had the challenging and exciting problem of selecting invived and contributed talks for the conferences and the workshop from the influx of abstracts mentioning new results and ideas. The success of the conference was determined by these contributions. Scientists from 15 countries gave 70 talks, presented 176 posters and submitted 146 papers, which are published in the present volume of proceedings.
Book Synopsis Free Electron Laser Material Damage Studies by :
Download or read book Free Electron Laser Material Damage Studies written by and published by . This book was released on 2000 with total page 110 pages. Available in PDF, EPUB and Kindle. Book excerpt: Today's surface ships are faced with an increased vulnerability to anti-ship cruise missiles, due to a change from operating in open oceans to primarily operating in the world's littorals. One possible solution to counter this threat is the use of a high-energy laser to destroy the missiles in flight. The Free Electron Laser is possibly the best choice of lasers for a marine environment since its wavelength can be changed over a wide range allowing the operator to choose the best wavelength to transmit through the atmosphere. Material damage studies on various anti-ship cruise missile materials were carried out at Thomas Jefferson National Accelerator Facility (TJNAF) in Newport News, Virginia. Experimental procedures presented in this report allow a scaled down laser of a few hundred to a few thousand watts to evaluate the damage from a weapon size laser of the megawatt class. The EEL beam bombards the target with a steady stream of picosecond length pulses at rates of 18MHz or greater. No other experiments have previously been done to explore the effects of the EEL pulse on materials. This report contains the work of several theses conducted at the Naval Postgraduate School over the past two years, and has been a productive cooperation among NPS, TJNAF, NRL, and NSWD at Port Hueneme, to the benefit of the Department of Defense.
Book Synopsis Free Electron Laser Material Damage Studies by : R. D. McGinnis
Download or read book Free Electron Laser Material Damage Studies written by R. D. McGinnis and published by . This book was released on 2000-11-01 with total page 110 pages. Available in PDF, EPUB and Kindle. Book excerpt: Today's surface ships are faced with an increased vulnerability to anti-ship cruise missiles, due to a change from operating in open oceans to primarily operating in the world's littorals. One possible solution to counter this threat is the use of a high-energy laser to destroy the missiles in flight. The Free Electron Laser is possibly the best choice of lasers for a marine environment since its wavelength can be changed over a wide range allowing the operator to choose the best wavelength to transmit through the atmosphere. Material damage studies on various anti-ship cruise missile materials were carried out at Thomas Jefferson National Accelerator Facility (TJNAF) in Newport News, Virginia. Experimental procedures presented in this report allow a scaled down laser of a few hundred to a few thousand watts to evaluate the damage from a weapon size laser of the megawatt class. The EEL beam bombards the target with a steady stream of picosecond length pulses at rates of 18MHz or greater. No other experiments have previously been done to explore the effects of the EEL pulse on materials. This report contains the work of several theses conducted at the Naval Postgraduate School over the past two years, and has been a productive cooperation among NPS, TJNAF, NRL, and NSWD at Port Hueneme, to the benefit of the Department of Defense.
Book Synopsis Laser Induced Damage in Optical Materials by :
Download or read book Laser Induced Damage in Optical Materials written by and published by . This book was released on 1988 with total page 672 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Laser Induced Damage in Optical Materials by :
Download or read book Laser Induced Damage in Optical Materials written by and published by . This book was released on 1988 with total page 580 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Laser Induced Damage Measurements of Free Electron Laser Optical Components by : LJ. Jolin
Download or read book Laser Induced Damage Measurements of Free Electron Laser Optical Components written by LJ. Jolin and published by . This book was released on 1988 with total page 1 pages. Available in PDF, EPUB and Kindle. Book excerpt: A study of free electron laser (FEL) related optical damage is currently under way at Los Alamos National Laboratory. A single burst of the FEL has been simulated using a Nd:YAG laser system operating at 1064 nm. Thfe laser is a modelocked, 100 microsecond, pulse selected system operating at 10 pulses per second.
Book Synopsis Free Electron Lasers 2003 by : Eisuke J. Minehara
Download or read book Free Electron Lasers 2003 written by Eisuke J. Minehara and published by Newnes. This book was released on 2012-12-02 with total page 800 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book contains the Proceedings of the 25th International Free Electron Laser Conference and the 10th Free Electron Laser Users Workshop, which were held on September 8-12, 2003 in Tsukuba, Ibaraki in Japan.
Book Synopsis Free Electron Lasers 2002 by : K.-J. Kim
Download or read book Free Electron Lasers 2002 written by K.-J. Kim and published by Newnes. This book was released on 2012-12-02 with total page 727 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book contains the Proceedings of the 24th International Free Electron Laser Conference and the 9th Free Electron Laser Users Workshop, which were held on September 9-13, 2002 at Argonne National Laboratory. Part I has been reprinted from Nucl. Instr. and Meth. A 507 (2003), Nos. 1-2.
Book Synopsis Detector Damage at X-ray Free-Electron Laser Sources by :
Download or read book Detector Damage at X-ray Free-Electron Laser Sources written by and published by . This book was released on 2016 with total page 10 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Damage Threshold Studies in Laser Crystals: Self-Focusing Experiments and Electron Heating Theory by : Concetto R. Giuliano
Download or read book Damage Threshold Studies in Laser Crystals: Self-Focusing Experiments and Electron Heating Theory written by Concetto R. Giuliano and published by . This book was released on 1971 with total page 67 pages. Available in PDF, EPUB and Kindle. Book excerpt: Details of the temporal development of damage tracks are presented and discussed in terms of a self-focusing theory. The results of a number of streak camera photographs show that the damage track grows in a way which depends on the temporal behavior of the leading edge of the incident pulse. This work constitutes the first direct evidence for a moving self-focus in solids. A comparison with self-focusing theory is given and the importance of electrostriction is made evident. Damage thresholds in sapphire for lenses of different focal length are presented and compared with the results obtained for ruby in the last report. Also in this report damage with cylindrical lenses is discussed. An observation of rings in the beam profile of the focused laser beam is presented. The phenomenon which appears at points beyond the beam waist is a property of the ruby laser or possibly a combination of the laser and the lenses. This behavior could well be a general property of 'single mode' solid state lasers. Further theoretical effort has been devoted to the problem of heating of electrons in polar crystals by intense optical fields. A kinetic equation has been developed which appears to offer a basis for settling the question of electron heating. (Author).
Book Synopsis Studies of Laser Damage Phenomena in Materials by : T. J. Magee
Download or read book Studies of Laser Damage Phenomena in Materials written by T. J. Magee and published by . This book was released on 1976 with total page 72 pages. Available in PDF, EPUB and Kindle. Book excerpt: Research was completed on the analysis of plasma expansion and momentum transfer at the surface of laser-irradiated targets. Experiments were then conducted on mixed and single crystal KC1 samples to assess the influence of high-energy electrons on the infrared absorption at 10.6 micrometers. The studies included simultaneous CW electron and F-light irradiation to determine the correlation between F-aggregate centers and infrared absorption. In addition, during this period, studies were completed on the identification of scatter and absorption sites responsible for the decreased infrared transmission in polycrystalline ZnSe samples. Preparations have also been made for irrdiations of a variety of prototype laser windows, supplied by the Air Force Materials Laboratory, at the NASA-Ames 40 kW CO2 laser facility. This report summarizes progress in these and other areas. (Author).
Book Synopsis Laser Damage on Zinc Selenide and Cadmium Telluride Using the Stanford Mark III Infrared Free Electron Laser by : SV. Benson
Download or read book Laser Damage on Zinc Selenide and Cadmium Telluride Using the Stanford Mark III Infrared Free Electron Laser written by SV. Benson and published by . This book was released on 1988 with total page 9 pages. Available in PDF, EPUB and Kindle. Book excerpt: We have encountered intracavity optical damage, and have estimated fluence damage thresholds, in samples of CVD zinc selenide which have been used as intracavity Brewster plate output couplers for the Stanford Mark III infrared free electron laser. For spot radii of approximately 1.4 mm and wavelengths in the range of 3 ?n to 4 ?m, we have determined damage thresholds ranging from 8.2 J/cm2 to 11.3 J/cm2 for optical macropulses of 2 ?s duration and 15 Hz repetition rate, with corresponding circulating micropulse intensities on the order of 5 GW/cm2; in most cases catastrophic damage seemed to occur due to the coalescence of tiny pits in the surface. We also report on damage threshold measurements for uncoated cadmium telluride at 3.2 ?m, and observe a fluence dependent damage threshold of approximately 6.3 J/cm2 for macropulses scaled (via ?1/2) to a 1 ?s duration. Finally, we observe a lowering of the damage threshold of uncoated CdTe in the presence of the laser harmonics, presumably due to free carrier absorption of the fundamental.
