Publications

Recent Publications | Other Publications and Proceedings | Media Articles

Recent Publications:

W. Yan, Wenchao, C. Fruhling, G. Golovin, D. Haden, J. Luo, Ji, P. Zhang, B. Zhao, J. Zhang, C. Liu, C. Min, S. Chen, S. Banerjee, and D. Umstadter; "High-order multiphoton Thomson scattering," Nature Photonics 11(8), 514-520 (2017).
G Golovin, S Banerjee, S Chen, N Powers, C Liu, W Yan, J Zhang, P Zhang, B Zhao, D Umstadter, "Control and optimization of a staged laser-wakefield accelerator," Nuclear Instruments and Methods in Physics Research Section A 83 0, 375-380 (2016).
G. Golovin, S. Banerjee, C. Liu, S. Chen, J. Zhang, B. Zhao, P. Zhang, M. Veale, M. Wilson, P. Seller, and D. Umstadter, “Intrinsic beam emittance of laser-accelerated electrons measured by x-ray spectroscopic imaging,” Scientific Reports 6, 24622 (2016). doi:10.1038/srep24622
S. Chen, G. Golovin, C. Miller, D. Haden, S. Banerjee, P. Zhang, C. Liu, J. Zhang, B. Zhao, S. Clarke, S. Pozzi, D. Umstadter, Shielded radiography with a laser-driven MeV-energy X-ray source," Nuclear Instruments and Methods in Physics Research Section B 366, 217-223 (2016).
S. Banerjee, S. Chen, N. Powers, C. Liu, G. Golovin, J. Zhang, B. Zhao, S. Clarke, S. Pozzi, J. Silano, H. Karwowski, and D. Umstadter, "Compact source of narrowband and tunable x-rays for radiography," Nuclear Instruments and Methods in Physics Research Section B 350,106-111 (2015).
D. Umstadter, "All-laser-driven Thomson x-ray sources," Contemporary Physics, DOI: 10.1080/00107514.2015.1023519 (2015).
G. Golovin, S. Chen, N. Powers, C. Liu, S. Banerjee, J. Zhang, M. Zeng, Z. Sheng, and D. Umstadter, "Tunable monoenergetic electron beams from independently controllable laser-wakefield acceleration and injection." Physical Review St Accelerators and Beams Physical Review St Accelerators and Beams 18, 011301 (2015).
G. Golovin, S. Chen, N. Powers, C. Liu, S. Banerjee, J. Zhang, M. Zeng, Z. Sheng, D. Umstadter, "Independent control of laser wakefield-accelerated electron-beam parameters." Proc. SPIE 9514, Laser Acceleration of Electrons, Protons, and Ions III; and Medical Applications of Laser-Generated Beams of Particles III, 951405 (May 14, 2015); doi:10.1117/12.2182707.
Donald Umstadter, "Narrow bandwidth and tunable hard x-rays from an all-laser-driven Thomson light source," Proc. SPIE 9509, Relativistic Plasma Waves and Particle Beams as Coherent and Incoherent Radiation Sources, 95090A (May 12, 2015); doi:10.1117/12.2182696.
Sudeep Banerjee, Grigory Golovin, Ping Zhang, Dan Haden, Shouyuan Chen, Cheng Liu, Jun Zhang, Baozhen Zhao, Kevin Brown , Jared Mills, Chad Petersen, Donald Umstadter, "Photonuclear and radiography applications of narrowband, multi-MeV all-optical Thomson x-ray source," Proc. SPIE 9515, Research Using Extreme Light: Entering New Frontiers with Petawatt-Class Lasers II, 95151C (May 1, 2015); doi:10.1117/12.2183401.
B. Zhao, J. Zhang, S. Chen, C. Liu, G. Golovin, S. Banerjee, K. Brown, J. Mills, C. Petersen, and D. Umstadter, “Wavefront-correction for nearly diffraction-limited focusing of dual-color laser beams to high intensities,” Optics Express 22, 22, 26947-26955 (2014).
Cheng Liu, Grigory Golovin, Shouyuan Chen, Jun Zhang, Baozhen Zhao, Daniel Haden, Sudeep Banerjee, Jack Silano, Hugon Karwowski, and Donald Umstadter," Generation of 9 MeV γ-rays by all-laser-driven Compton scattering with second-harmonic laser light," Optics Letters 39, 14, 4132-4135 (2014). http://dx.doi.org/10.1364/OL.39.004132. View PDF.
Cheng Liu, Jun Zhang, Shouyuan Chen, Gregory Golovin, Sudeep Banerjee, Baozhen Zhao, Nathan Powers, Isaac Ghebregziabher, and Donald Umstadter, “Adaptive-feedback spectral-phase control for interactions with transform-limited ultrashort high-power laser pulses,” Optics Letters 39, 1, 80-83 (2014). http://dx.doi.org/10.1364/OL.39.000080. View PDF.
N. D. Powers, I. Ghebregziabher, G. Golovin, C. Liu, S. Chen, S. Banerjee, J. Zhang, and D. P. Umstadter,"Quasi-monoenergetic and tunable X-rays from a laser-driven Compton light source," Nature Photonics 828-31 (2014). doi:10.1038/nphoton.2013.314. View the preprint version.
S. Chen et al., "MeV-Energy X Rays from Inverse Compton Scattering with Laser-Wakefield Accelerated Electrons," Phys. Rev. Lett. 110, 155003 (2013).
S. Banerjee et al., "Stable, tunable, quasimonoenergetic electron beams produced in a laser wakefield near the threshold for self-injection," Phys. Rev. ST Accel. Beams 16, 031302 (2013).
Cheng Liu, Sudeep Banerjee, Jun Zhang, Shouyuan Chen, Kevin Brown, Jared Mills, Nathan Powers, Baozhen Zhao, Gregory Golovin, Isaac Ghebregziabher and Donald Umstadter, "Repetitive petawatt-class laser with near-diffraction-limited focal spot and transform-limited pulse duration," Proc. SPIE 8599, Solid State Lasers XXII: Technology and Devices, 859919 (March 6, 2013); doi:10.1117/12.2005008. View PDF.
I. Ghebregziabher, B. A. Shadwick, and D. Umstadter, "Spectral bandwidth reduction of Thomson scattered light by pulse chirping," Phys. Rev. ST Accel. Beams 16, 030705 (2013).
J. Silano et al., "Selective activation with all-laser-driven Thomson γ-ray," Proceedings of the 2013 IEEE International Conference on Technologies for Homeland Security, 429-434 (Waltham, MA, 2013).
B. M. Cowan et al., "Computationally efficient methods for modeling laser wakefield acceleration in the blowout regime," J. Plasma Phys. 78, 469 (2012).
D. Umstadter, "Viewpoint: Extreme X Rays Probe Extreme Matter," Physics 5, 88 (2012).
S. Banerjee et al., "Generation of tunable, 100–800 MeV quasi-monoenergetic electron beams from a laser-wakefield accelerator in the blowout regime," Phys. Plasmas 19, 056703 (2012).
I.Ghebregziabher et al., "Spectral Bandwidth Reduction of Thomson Scattered Light by Pulse Chirping," arXiv:1204.1068v1, April (2012).
D. Umstadter, "Laser-wakefield accelerators: Glass-guiding benefits," Nature Photonics 5, 576-577 (2011).
S. Y. Kalmykov et al., "Electron self-injection into an evolving plasma bubble: Quasi-monoenergetic laser-plasma acceleration in the blowout regime," Phys. Plasmas 18, 056704 (2011).
V. Ramanathan, S. Banerjee, N. Powers, et al., "Submillimeter-resolution radiography of shielded structures with laser-accelerated electron beams," Phys. Rev. ST Accel. Beams 13, 104701 (2010).
S. Baghchi et al., "Measurement of Damage Threshold for Metallic Gratings under Intense Laser Pulse Irradiation," in Conference on Lasers and Electro-Optics/International Quantum Electronics Conference, OSA Technical Digest (CD) (Optical Society of America, 2009), paper JThE51.
S. Banerjee et al., "High-Brightness, Stable Electron Beams from a LaserWakefield Accelerator Operating in the Matched Regime," in Conference on Lasers and Electro-Optics/International Quantum Electronics Conference, OSA Technical Digest (CD) (Optical Society of America, 2009), paper JFB2.
V. Ramanathan et al., "Laser-Plasma Generated Electron Beams for Radiographic Applications," in Conference on Lasers and Electro-Optics/International Quantum Electronics Conference, OSA Technical Digest (CD) (Optical Society of America, 2009), paper JFB6.
W.J. Walsh et al., "Application of a Laser-Wakefield Driven Monochromatic Photon Source to Nuclear Resonance Fluorescence," Proceedings of the Conference on Technologies for Homeland Security, 2009 IEEE Nuclear Science Symposium Conference Record, p.80
S.D. Clarke et al., "Monte Carlo Characterization of a Pulsed Laser-Wakefield Driven Monochromatic X-Ray Source," Proceedings of the Conference on Technologies for Homeland Security, 2009 IEEE Nuclear Science Symposium Conference Record, p.1998
S. Banerjee et al., "Stable, monoenergetic 50-400 MeV electron beams with a matched laser wakefield accelerator," Proceedings of PAC09, Particle Accelerator Conference 2009 , A14 Advance Concepts, p.1
N. Cunningham et al., "High-energy Laser-accelerated Electron Beams for Long-range Interrogation," CP1099, Conference on the Application of Accelerators in Research and Industry, 20th International Conference, edited by F.D. McDaniel and B.L. Doyle (AIP, 2009), p. 638
D. Umstadter et al., "Development of a Source of Quasi-Monoenergetic MeV-Energy Photons for Detection of Special Nuclear Materials," CP1099, Conference on the Application of Accelerators in Research and Industry, 20th International Conference, edited by F.D. McDaniel and B.L. Doyle (AIP, 2009), p. 606
S. Banerjee et al., "All-laser-driven, MeV-energy X-ray source for detection of SNM," Conference on Technologies for Homeland Security, 08 (IEEE, 2008) p. 1.

Other Publications and Proceedings

C. Liu, J. Zhang, G. Golovin, S. Chen, S. Banerjee, B. Zhao, N. Powers, I. Ghebregziabher, and D. P. Umstadter, "Adaptive spectral-phase control for laser wakefield electron acceleration," Lasers and Electro-Optics (CLEO), San Jose, CA (2014).
G. Golovin, S. Chen, N. Powers, C. Liu, S. Banerjee, J. Zhang, M. Zeng, Z. Sheng, and D. Umstadter, "Tunable Monoenergetic Electron Beams from Staged Ionization Assisted Laser Wakefield Accelerator," Lasers and Electro-Optics (CLEO), San Jose, CA (2014).
N. Powers, I. Ghebregziabher, G. Golovin, C. Liu, S. Chen, S. Banerjee, J. Zhang, and D. Umstadter, "Quasi Monoenergetic and Tunable X-rays by Laser Compton Scattering from Laser Wakefield e-beam," Lasers and Electro-Optics (CLEO), San Jose, CA (2014).
S. Chen, M. Rever, P. Zhang, W. Theobald, and D. Umstadter, "Observation of relativistic cross-phase modulation in high-intensity laser-plasma interactions," Phys. Rev. E 74, 046406 (2006).
Scott M. Sepke, Donald P. Umstadter, "Exact analytical solution for the vector electromagnetic field of Gaussian, flattened Gaussian, and annular Gaussian laser modes," Optics Letters 31 , 1447-1449 (May 2006).
Scott M. Sepke and Donald P. Umstadter, "Analytical solutions for the electromagnetic fields of tightly focused laser beams of arbitrary pulse length," Optics Letters 31, 2589-2591 (2006).
Scott M. Sepke, Donald P. Umstadter, "Analytical solutions for the electromagnetic fields of flattened and annular Gaussian laser modes. I. Small F-number laser focusing," JOSA B 23, 2157-2165 (2006).
Scott M. Sepke, Donald P. Umstadter, "Analytical solutions for the electromagnetic fields of flattened and annular Gaussian laser modes. II. Large F-number laser focusing," JOSA B 23, 2166-2173 (2006).
Scott M. Sepke, Donald P. Umstadter, "Analytical solutions for the electromagnetic fields of flattened and annular Gaussian laser modes. III. Arbitrary length pulses and spot sizes," JOSA B 23, 2295-2302 (2006).
Sudeep Banerjee, Scott Sepke, Rahul Shah, Anthony Valenzuela, Anatoly Maksimchuk, and Donald Umstadter, "Optical Deflection and Temporal Characterization of an Ultrafast Laser-Produced Electron Beam," Phys. Rev. Lett. 95, 035004 (2005).
Donald Umstadter, "Einstein's impact on optics at the frontier," Phys. Letts. A 347, 121 (2005) [Einstein Special Issue - Edited by P. Holland].
Scott Sepke, Y. Y. Lau, James Paul Holloway, and Donald Umstadter, "Thomson scattering and ponderomotive intermodulation within standing laser beat waves in plasma," Phys. Rev. E 72, 026501 (2005).
Kim Ta Phuoc, Fréderic BurgyJean-Philippe Rousseau, Victor Malka, Antoine Rousse, Rahul Shah, Donald Umstadter, Alexander Pukhov, Sergei Kiselev, "Laser based synchrotron radiation," Phys. Plasmas 12, 023101 (2005).
D. Umstadter, S. Sepke, and S. Chen, “Relativistic Nonlinear Optics,” Advances in Atomic, Molecular, and Optical Physics, Vol. 52, edited by P.R. Berman and C.C. Lin (Elsevier Inc., San Diego, 2005).
Antoine Rousse, KimTa Phuoc, Rahul Shah, Alexander Pukhov, Eric Lefebvre, Victor Malka, Sergey Kiselev, Fre´deric Burgy, Jean-Philippe Rousseau, Donald Umstadter, and Danie´le Hulin, "Production of a keV X-Ray Beam from Synchrotron Radiation in Relativistic Laser-Plasma Interaction," Phys.Rev. Lett. 93, 135005 (2004).
A. Maksimchuk, K. Flippo, H. Krause, G. Mourou, K. Nemoto, D. Shultz, D. Umstadter, R. Vane, V. Yu. Bychenkov, G. I. Dudnikova, V. F. Kovalev, K. Mima, V. N. Novikov, Y. Sentoku, S. V. Tolokonnikov, "High-Energy Ion Generation by Short Laser Pulses," Plasma Phys. Reports 30, 473 (2004).
E. S. Dodd, J. K. Kim, and D. Umstadter, "Simulation of ultrashort electron pulse generation from optical injection into wake-field plasma waves," Phys. Rev. E 70, 056410 (2004).
D. Umstadter, "Relativistic Nonlinear Optics," Encyclopedia of Modern Optics, edited by Robert D. Guenther, Duncan G. Steel and Leopold Bayvel, Elsevier, Oxford, (2004), p. 289 [invited].
P. Zhang, N. Saleh, S. Chen, Z.M. Sheng and D. Umstadter, “Laser-Energy Transfer and Enhancement of Plasma Waves and Electron Beams by Interfering High-Intensity Laser Pulses,” Phys. Rev. Lett. 91, 225001 (2003)
K. Ta Phuoc, A. Rousse, M. Pittman, J. P. Rousseau, V. Malka, S. Fritzler, D. Umstadter, and D. Hulin, "X-Ray Radiation from Nonlinear Thomson Scattering of an Intense Femtosecond Laser on Relativistic Electrons in a Helium Plasma," Phys. Rev. Lett. 91, 195001 (2003).
Fei He, Y. Y. Lau, Donald P. Umstadter, and Richard Kowalczyk, Backscattering of an Intense Laser Beam by an Electron, Phys. Rev. Lett. 90, 055002 (2003).
D. Umstadter, “Topical Review: Relativistic Laser-Plasma Interactions,'' J. Phys. D: Appl. Phys. 36, R151–R165 (2003) [invited].
Z.-M. Sheng, J . Zhang, D . Umstadter, "Plasma density gratings induced by intersecting laser pulses in underdense plasmas," Appl. Phys. B 77, 673–680 (2003).
D. Umstadter, "Laser-driven x-ray sources," 2003 Yearbook in Science and Technology (McGraw-Hill, New York, 2003), p. 215. [Also appears online at AccessScience @ McGraw-Hill (http://www.accessscience.com/)] [invited].
Y.Y. Lau, F. He and D. Umstadter "Nonlinear Thomson scattering: A tutorial," Phys. Plasmas 10, 2155 (2003) [invited].
P. Zhang, N. Saleh, S. Chen, Z.M. Sheng and D. Umstadter, "An Optical Trap for Relativistic Plasma," Phys. Plasmas 10, 2093 (2003) [invited].
D. Umstadter, "Laser-Injected Laser Accelerator Concept," Femtosecond Beam Science, edited by M. Uesaka (Imperial College Press/World Scientific, London, to be published, 2003) [invited].
S. Banerjee, A. R. Valenzuela, R. C. Shah, A. Maksimchuk, and D. Umstadter, "High-harmonic generation in plasmas from relativistic laser-electron scattering," J. Opt. Soc. Am. B 20, 182 (2003).
Xiaofang Wang, Ned Saleh, Mohan Krishnan, Haiwen Wang, Sterling Backus, Margaret Murnane, Henry Kapteyn, Donald Umstadter, Quandong Wang, and Baifei Shen, "Generation of mega-electron-volt electron beams by an ultrafast intense laser pulse," J. Opt. Soc. Am. B 20, 132 (2003).
F. He, YY Lau, D. Umstadter, T Strickler, "Phase dependence of Thomson scattering in an ultraintense laser field," Phys. Plasmas 9, 4325 (2002).
S. Banerjee, A. R. Valenzuela, R. C. Shah, A. Maksimchuk, and D. Umstadter, "High harmonic generation in relativistic laser–plasma interaction," Phys. Plasmas 9, 2393 (2002) [invited].
G. Mourou and D. Umstadter, "Extreme Light," Scientific American (May, 2002), p. 81 [invited].
Y Sentoku, V. Y. Bychenkov, K. Flippo, A. Maksimchuk, K. Mima, G. Mourou. Z. M. Sheng and D. Umstadter, High-energy Ion Generation in Interaction of Short Laser Pulse with High-Density Plasma, Appl. Phys. B 74, 207–215 (2002).
N. Saleh, P. Zhang, S. Chen, Z.-M. Sheng, A. Maksimchuk, V. Yanovsky, and D. Umstadter, "A Proof-of-Principle Experiment of Optical Injection of Electrons in Laser-Driven Plasma Waves," AIP Conf. Proc. 647, 690 (2002).
K. Flippo, A. Maksimchuk, S. Banerjee, K. Nash, V. Wong, T. Lin, K. Nemoto, V. Yu. Bychenkov, Y. Sentoku, G. Mourou, and D. Umstadter, "Study of Energetic Ion Generation from High-Intensity-Laser Dense-Plasma Interactions," AIP Conf. Proc. 647, 255 (2002).
D. Umstadter, S. Banerjee, S. Chen, E. Dodd, K. Flippo, A. Maksimchuk, N. Saleh, A. Valenzuela, and P. Zhang, "Developments in relativistic nonlinear optics," AIP Conf. Proc. 611, 95 (2002).
E. Dodd and D. Umstadter, "Coherent control of stimulated Raman scattering using chirped laser pulses," Phys. Plasmas 8, 3531 (2001).
D. Umstadter, "Physics and Applications of Relativistic Plasmas Driven by Ultra-intense Lasers," Phys. Plasmas 8,1774—1785 (2001) [invited].
V. Yu. Bychenkov, W. Rozmus, A. Maksimchuk, D. Umstadter , and C. E. Capjack, Fast Ignitor Concept with Light Ions, Plasma Physics Reports, 27, pp. 1017–1020 (2001). [Translated from Fizika Plazmy, 27, 1076–1080 (2001).]
K. Nemoto, A. Maksimchuk, S. Banerjee, K. Flippo, G. Mourou, and D. Umstadter and V. Yu. Bychenkov, "Laser-triggered Ion Acceleration and Table Top Isotope Production," Appl. Phys. Lett. 78, 595 (2001).
K. Flippo, S. Banerjee, V. Yu. Bychenkov, S. Gu, A. Maksimchuk, G. Mourou, K. Nemoto, and D. Umstadter, "Laser acceleration of protons from thin film targets," AIP Conf. Proc. 569, 553 (2001).
N. Saleh, P. Han, C. Keppel, P. Gueye, V. Yanovsky, and D. Umstadter, "Status of the LILAC experiment," AIP Conf. Proc. 569, 127 (2001).
S.-Y. Chen, A. Maksimchuk, E. Esarey and D. Umstadter, "Observation of Phase-Matched Relativistic Harmonic Generation," Phys. Rev. Lett. 84, 5528 (2000).
X. Wang, M. Krishnan, N. Saleh, H. Wang and D. Umstadter, "Electron Acceleration and the Propagation of Ultrashort High-Intensity Laser Pulses in Plasmas," Phys. Rev. Lett. 84, 5324 (2000).
A. Maksimchuk, S. Gu, K. Flippo, D. Umstadter and V. Yu. Bychenkov, "Forward Ion Acceleration in Thin Films Driven by a High-Intensity Laser," Phys. Rev. Lett. 84, 4108 (2000).
D. Umstadter, S.-Y. Chen, G. Ma, A. Maksimchuk, G. Mourou, M. Nantel, S. Pikuz, G. Sarkisov and R. Wagner, "Dense and Relativistic Plasmas Produced by Compact High-Intensity Lasers," Astrophysical Journal Supplement Series, 127 513-518, (2000).
S.-Y. Chen, M. Krishnan, A. Maksimchuk, and D. Umstadter, "Excitation and damping of a self-modulated laser wakefield,"Physics of Plasmas, 7, 403 (2000).
F. B. Rosmej et al., "X-Ray Radiation from Ions with K-Shell Vacancies," J. Quant. Spectrosc. Radiat. Transfer., 65, 477-499,(2000).
A. Maksimchuk, M. Nantel, G. Ma, S. Gu, C. Y. Cote, D. Umstadter, S. A. Pikuz, I. Yu. Skobelev, A. Ya. Faenov, "X-Ray Radiation from Matter in Extreme Conditions," J. Quant. Spectrosc. Radiat. Transfer., 65, 367—385 (2000).
N. Saleh, K. Flippo, K. Nemoto, D. Umstadter, R. A. Crowell, C. D Jonah, A. D Trifunac, "Pulse radiolysis of liquid water using picosecond electron pulses produced by a table-top terawatt laser system," Review of Scientific Instruments, 71, 2305 (2000).
D. Umstadter, "Photonuclear Physics: Laser Splits Atom," Nature 404, 239 (2000) [invited].
F. Faenov et al., "High-Resolved X-Ray Spectra of Hollow Atoms in a Femtosecond Laser-Produced Solid Plasma" Physica Scripta, T80, 536—538 (1999).
S.-Y. Chen, M. Krishnan, A. Maksimchuk, R. Wagner, and D. Umstadter, "Detailed dynamics of electron beams self-trapped and accelerated in a self-modulated laser wakefield,"Physics of Plasmas, 6, 4739 (1999).
K. Assagaman, W. W. Buck, S.-Y. Chen, R. Ent, R. N. Green, P. Gueye, C. Keppel, D. Umstadter, G. Mourou, R. Wagner, "Electron beam characteristics of a laser-driven plasma wakefield accelerator," Nucl. Instr. Meas. A 438, 265 (1999).
G. S. Sarkisov, V. Yu. Bychenkov, V. N. Novikov, V. T. Tikhonchuk, A. Makismchuk, S. -Y. Chen, R. Wagner, G. Mourou and D. Umstadter, "Self-focusing, channel formation and high-energy ion generation interaction of an intense short laser pulse with a He jet," Phys. Rev.E 59 7042 (1999).
S. Y. Chen, M. Krishnan, A. Maksimchuk and D. Umstadter, "Acceleration of Electrons in a Self-Modulated Laser Wakefield," Advanced Accelerator Concepts: Eighth Workshop, edited by W. Lawson, C. Bellamy, and D. Brosius, AIP Conference Proceedings 472 (AIP Press, New York, 1999), p. 333.
J. K. Kim and D. Umstadter, "Cold Relativistic Wavebreaking Threshold of Two-Dimensional Plasma Waves," Advanced Accelerator Concepts: Eighth Workshop, edited by W. Lawson, C. Bellamy, and D. Brosius, AIP Conference Proceedings 472 (AIP Press, New York, 1999), p. 404.
E. Dodd, J. K. Kim and D. Umstadter, "Electron Injection by Dephasing Electrons with Laser Fields," Advanced Accelerator Concepts: Eighth Workshop, edited by W. Lawson, C. Bellamy, and D. Brosius, AIP Conference Proceedings 472 (AIP Press, New York, 1999), p. 886.
S. Y. Chen, A. Maksimchuk and D. Umstadter, "Experimental observation of nonlinear Thomson scattering," Nature, 396, 653 (1998).
D. Umstadter, S.-Y. Chen, R. Wagner, A. Maksimchuk and G. S. Sarkisov, "Nonlinear Optics in Relativistic Plasmas" Optics Express2, 282-288 (1998); [invited paper].
M. Nantel, G. Ma, S. Gu, C.Y. Cote, J. Itatani, and D. Umstadter, "Pressure Ionization and Line-Merging in Strongly-Coupled Plasmas Produced by 100-fs Laser Pulses," Phys. Rev. Lett. 80, 4442 (1998).
S.-Y. Chen, G. S. Sarkisov, A. Maksimchuk, R. Wagner and D. Umstadter, "Evolution of a Plasma Waveguide Created during Relativistic-Ponderomotive Self-Channeling of an Intense Laser Pulse," Phys. Rev. Lett. 80, 2610-13 (1998).
G. S. Sarkisov, V. Yu. Bychenkov, T. Tikhonchuk, A. Maksimchuk, S. Y. Chen, R. Wagner, G. Mourou and D. Umstadter, "Observation of the Plasma Channel Dynamics and Coulomb Explosion in the Interaction of a High-Intensity Laser Pulse with a He Gas Jet," JETP-Letters, 66, 828-34 (1997); translated from Pis'ma Zh. Eksp. Teor. Fiz. 66, 787-92 (1997).
S. A. Pikuz, A. Maksimchuk, D. Umstadter, M. Nantel, I. Yu. Skobelev, A. Ya. Faenov and A. Osterheld, "Observation of Laser Satellites in a Plasma Produced by a Femtosecond Laser Pulse," JETP-Letters, 66 480-6 (1997); translated from Pis'ma Zh. Eksp. Teor. Fiz. 66 454-9 (1997).
J. Workman, M. Nantel, A. Maksimchuk and D. Umstadter, "Application of a Picosecond X-Ray Source to Time-Resolved Plasma Dynamics," Appl. Phys. Lett. 70, 312 (1997).
R. Wagner, S.-Y. Chen, A. Maksimchuk and D. Umstadter, "Relativistically Self-Guided Laser Wakefield Acceleration," Phys. Rev. Lett. 78, 3125 (1997).
S. Y. Chen, R. Wagner, A. Maksimchuk and D. Umstadter, "Electron Acceleration by Self-Modulated Laser Wakefield in a Relativistically Self-Guided Channel," Advanced Accelerator Concepts, edited by S. Chattopadhyay, J. McCullourgh, and P. Dahl (AIP Press, New York, 1997), p. 408.
E. Dodd, J. K. Kim and D. Umstadter, "Ultrashort-Pulse Relativistic Electron Gun/Accelerator," Advanced Accelerator Concepts, edited by S. Chattopadhyay, J. McCullourgh, and P. Dahl (AIP Press, New York, 1997), p. 106.
S. P. Le Blanc, M. C. Downer, R. Wagner, S.-Y. Chen, A. Maksimchuk, G. Mourou and D. Umstadter, "Temporal Characterization of a Self-Modulated Laser Wakefield," Advanced Accelerator Concepts, edited by S. Chattopadhyay, J. McCullourgh, and P. Dahl (AIP Press, New York, 1997), p. 651.
M. Nantel, T. Buma, J. Workman, A. Maksimchuk and D. Umstadter, "Continuum Lowering in 100-fs Laser Produced Plasmas," Applications of High Field and Short Wavelength Sources VII, 1997 OSA Technical Digest Series, Vol. 7, (Optical Society of America, Washington, DC, 1997), p. 23.
J.-K. Kim, E. Dodd and D. Umstadter, "All-Optical Femtosecond Electron Acceleration," Applications of High Field and Short Wavelength Sources VII, 1997 OSA Technical Digest Series, Vol. 7, (Optical Society of America, Washington, DC, 1997), p. 121.
R. Wagner, S.-Y. Chen, A. Maksimchuk and D. Umstadter, "Relativistically Self-Guided Laser-Wakefield Acceleration," Applications of High Field and Short Wavelength Sources VII, 1997 OSA Technical Digest Series, Vol. 7, (Optical Society of America, Washington, DC, 1997), p. 237.
S. P. Le Blanc, M. C. Downer, T. Tajima, C. Siders, R. Wagner, S.-Y. Chen, A. Maksimchuk, G. Mourou and D. Umstadter, "Temporal Characterization of Plasma Wakefields Driven by Intense Femtoscecond Laser Pulses," Applications of High Field and Short Wavelength Sources VII, 1997 OSA Technical Digest Series, Vol. 7, (Optical Society of America, Washington, DC, 1997), p. 240.
D. Umstadter, "Laser Acceleration of Electrons: Zero to c in Less than Ten Microns," New Modes of Particle Acceleration Techniques and Sources, Z. Parsa, Ed., AIP Conference Proceedings 396 (American Institute of Physics, New York, 1997), pp. 89-94.
S. P. Le Blanc, M. C. Downer, R. Wagner, S.-Y. Chen, A. Maksimchuk, G. Mourou, and D. Umstadter, "Temporal characterization of a self-modulated laser wakefield accelerator," Conference on Lasers and Electro-Optics, Vol. 11, OSA Technical Digest Series (Optical Society of America, Washington, D.C., 1997), p. 313.
D. Umstadter, "An Ultrashort-Duration Relativistic Electron Beam Accelerated by an Intense Laser," Quantum Electronics and Laser Science (CLEO/QELS '97) Conference, Baltimore, MD, May, 1997, Vol. 11, OSA Technical Digest Series (Optical Society of America, Washington, D.C., 1997), p. 300.
D. Umstadter, S.-Y. Chen, A. Maksimchuk, G. Mourou, and R. Wagner, "Nonlinear Optics in Relativistic Plasmas and Laser Wakefield Acceleration of Electrons," Science 273, 472 (1996).
S. P. Le Blanc, M. C. Downer, R. Wagner, S.-Y. Chen, A. Maksimchuk, G. Mourou and D. Umstadter, "Temporal Characterization of a Self-Modulated Laser Wakefield," Phys. Rev. Lett. 77, 5381 (1996).
D. Umstadter, J. K. Kim, and E. Dodd, "Laser Injection of Ultrashort Electron Pulses into Wakefield Plasma Waves," Phys. Rev. Lett. 76, 2073 (1996).
J. Apruzese and D. Umstadter, "Enhancement of Short-Pulse Recombination-Pumped Gain by Soft-X-Ray Photoionization of the Ground State," JOSA B 13, 443 (1996).
J. Workman, A. Maksimchuk, X. Liu, U. Ellenberger, J. S. Coe, C.-Y. Chien, and D. Umstadter, "Picosecond Soft X-Ray Source from Subpicosecond-Laser-Produced Plasmas," JOSA B 13, 125 (1996).
A. Maksimchuk, X. Liu, J. Workman, G. Korn, J. Squier, D. Du, D. Umstadter, G. Mourou and M. Bouvier, "Signal Averaging X-Ray Streak Camera with Picosecond Jitter," Rev. Sci. Inst. 67, 697 (1996).
D. Umstadter, "Terawatt Lasers: Probing Unique Material Properties with Novel Diagnostic Sources," Digest IEEE/Lasers and Electro-Optics Society Summer Topical Meeting on Advanced Applications of Lasers in Materials and Processing, Broadband Optical Networks - Enabling Technologies and Applications; Smart Pixels; Optical MEMs and their Applications, Aug. 5-9, 1996, Keystone, CO (IEEE, New York, 1996), pp. 32-3
R. Wagner, S.-Y Chen, A. Maksimchuk, E. Dodd, J.-K. Kim, D. Umstadter, "A Collimated Beam of MeV Electrons Accelerated by a Terawatt Laser," Quantum Electronics and Laser Science Conference, Vol. 10, OSA Technical Digest Series (Optical Society of America, Washington, D.C., 1996), p. 70.
D. Umstadter, J.-K. Kim, E. Esarey, E. Dodd, T. Neubert, "Electron Acceleration by Nonlinear Plasma Waves Resonantly Driven with Optimized High-Intensity Pulse Trains," Future of Accelerator Physics: The Tamura Symposium, Nov., 1994, AIP-Conference Proceedings, No. 356, (American Institute of Physics, New York, 1996), pp. 270-300.
D. Umstadter, "Terawatt Lasers Produce Faster Electron Acceleration," Laser Focus World, p. 101 (February, 1996).
D. Umstadter, J. Workman, A. Maksimchuk, X. Liu, U. Ellenberger, J. S. Coe, and C.-Y. Chien, "Picosecond X-Rays from Subpicosecond Laser-Produced Hot-Dense Matter Interactions," J. Quant. Spectrosc. Radiat. Transfer 54, 401 (1995).
J. Workman, A. Maksimchuk, X. Liu, U. Ellenberger, J. S. Coe, C.-Y. Chien and D. Umstadter, "Control of Bright Picosecond X-Ray Emission from Intense Sub-Picosecond Laser-Plasma Interactions," Phys. Rev. Lett. 75, 2324 (1995).
D. Umstadter, J. Kim, E. Esarey, E. Dodd and T. Neubert, "Resonant Laser-Driven Plasma Waves for Electron Acceleration," Phys. Rev. E 51, 3484 (1995).
X. Liu, R. Wagner, A. Maksimchuk, E. Goodman, J. Workman, D. Umstadter and A. Migus, "Nonlinear Temporal Diffraction and Frequency Shifts Resulting from Pulse Shaping in Chirped-Pulse Amplification Systems," Opt. Lett. 20, 1163 (1995).
X. Liu, R. Wagner, A. Maksimchuk, E. Goodman, J. Workman, D. Umstadter and A. Migus, "Temporal Diffraction in a Chirped-Pulse Amplification System," CLEO '95, Conference on Lasers and Electro-Optics, May 22-26, 1995, Baltimore, MA (Optical Society of America, Washington, DC, 1995), p. 427.
D. Umstadter, "Bright Ultrashort X-Rays from Intense Subpicosecond Laser-Plasma Interactions," International Conference on Plasma Science, June 5-8, 1995, Madison, WI (IEEE, New York, 1995) p. 171.
D. Umstadter, J. Kim, E. Esarey, E. Dodd, and T. Neubert, "Resonantly Driven Laser-Plasma Electron Accelerators," Advanced Accelerator Concepts, Fontana, WI, 1994, Amer. Inst. of Conf. Proc. No. 335, P. Schoessow, ed., (AIP Press, New York, 1995), pp. 551-573.
D. Umstadter, E. Esarey, and J. Kim, "Nonlinear Plasma Waves Resonantly Driven by Optimized Laser Pulse Trains," Phys. Rev. Lett. 72, 1224 (1994).
D. Umstadter, L.-H. Yu, D. Li, and E. Johnson, "Ultrashort Ultraviolet Free-Electron Lasers," J. X-Ray Sci. and Tech. 4, 263-274 (1994).
L.-H. Yu, E. Johnson, D. Li, and D. Umstadter, "Femtosecond Free-Electron Laser by Chirped Pulse Amplification," Phys. Rev. E 49, 4480 (1994).
D. Umstadter, J. Kim, E. Esarey, E. Dodd, and T. Neubert, "Electron Acceleration by Nonlinear Plasma Waves Resonantly Driven with Optimized High-Intensity Laser Pulse Trains," in The Future of Accelerator Physics, T. Tajima, ed. (American Insitute of Physics, New York, 1994), pp. 270-300.
A. Maksimchuk, J. Workman, X. Liu, U. Ellenberger, J. S. Coe, C.-Y. Chien, and D. Umstadter, "Bright Picosecond X-Rays from Sub-Picosecond Laser-Plasma Interactions," X-Ray Lasers 1994, Amer. Inst. of Physics Conf. Proc. No. 332, D. E. Eder and D. Matthews, eds. (AIP Press, New York, 1994), pp. 473-477.
D. Umstadter, J. Workman, A. Maksimchuk, X. Liu, C.-Y. Chien, and S. Coe, "Laser-Produced Picosecond Soft X-Ray Continuum Radiation," Proceedings of LASERS `93, V. J. Corcoran and T. A. Goldman, eds. (STS Press, McLean, VA, 1994), p. 165.
D. Umstadter, E. Esarey, and J. Kim, "Resonant Laser-Plasma Electron Acceleration," Laser Interaction and Related Plasma Phenomena, Amer. Inst. of Physics Conf. Proc. No. 318, G. Miley, ed., (AIP Press, New York, 1994), pp. 65-66.
X. Liu, D. Umstadter, E. Esarey, and A. Ting, "Harmonic Generation by an Intense Laser Pulse in Neutral and Ionized Gases," IEEE Trans. Plasma Sci. 21, 90 (1993).
E. Esarey, A. Ting, P. Sprangle, D. Umstadter, and X. Liu, "Nonlinear Analysis of Relativistic Harmonic Generation by Intense Lasers in Plasmas," IEEE Trans. Plasma Sci. 21, 95 (1993).
A. Ting, A. Fisher, R. Fischer, J. Grun, J. Krall, E. Esarey, P. Sprangle, D. Umstadter, and G. Mourou, "A 100 MeV Proof-of-Principle Laser Wakefield Accelerator Experiment," Proceedings of International Conference on Particle Accelerators, Washington, DC, USA, 17-20 May 1993 (IEEE, New York, 1993).
X. Liu and D. Umstadter, "Femtosecond Dynamics of Short-Scale-Length Laser Plasmas," in Short-Pulse High-Intensity Lasers and Applications II, H. A. Baldis, ed., Proc. SPIE 1860, 103-109 (1993).
D. Umstadter, X. Liu, and J. Workman, "Intense Ultrashort-Pulse Laser-Solid Interactions for Soft X-Ray Generation," in Short-Pulse High-Intensity Lasers and Applications II, H. A. Baldis, ed., Proc. SPIE 1860, 80 (1993).
G. Mourou and D. Umstadter, "Development and Applications of Compact High-Intensity Lasers," Phys. Fluids B 4, 2315 (1992).
X. Liu and D. Umstadter, "Competition Between Ponderomotive and Thermal Pressures in Short-Scale-Length Laser-Plasmas," Phys. Rev. Lett. 69, 1935 (1992).
D. Umstadter and X. Liu, "Self-Guiding of Intense Short-Pulse Lasers for Long Plasma Channel Production," in Advanced Accelerator Concepts, Port Jefferson, NY 1992, J. Wurtele, ed., (Amer. Inst. Phys., New York, 1992), 450.

Media Articles:

Electronic Media

UNL physicists develop X-ray that could prevent terrorist attack, KETV Omaha Online (video), January 17, 2016.
X-ray Vision? Laser-Derived X-ray Method Finds Hidden Nuclear Materials, HighBeam Research, January 10, 2016.
"Engineers unveil laser x-ray technology to curtail nuclear smuggling," Wonderful Engineering, Dec. 28, 2015.
"Laser-derived X-ray method finds hidden nuclear materials," MyInforms.com, Dec. 23, 2015.
David Szondy, "Laser X-rays to nab nuclear smugglers,” gizmag.com [now newatlas.com], (Dec. 23, 2015).
"Experiments uncover novel X-ray process could detect chief materials," FreshGhana.com, Dec. 23, 2015.
"Experiments show novel X-ray method could detect nuclear materials," domain-b, Dec. 23, 2015.
"X-ray vision? Laser-derived X-ray method finds hidden nuclear materials," Chemeurope.com, Dec. 23, 2015.
"X-ray Vision? Laser-Derived X-ray Method Finds Hidden Nuclear Materials," ECN Magazine, Dec. 21, 2015.
"X-ray vision? Laser-derived X-ray method finds hidden nuclear materials," EurekAlert!, Dec. 21, 2015.
"X-ray vision? Laser-derived X-ray method finds hidden nuclear materials: Researchers say it could be used to prevent nuclear terrorism," ScienceDaily, 21 December 2015.
"Experiments Show Novel X-Ray Method Could Detect Nuclear Materials," Targeted News Service, Dec. 21, 2015.
J. Wenz, "How Lasers Can Spot a Dirty Bomb in a Cargo Container," Popular Mechanics, Dec. 21, 2015.
2015-2016 LiveBIG: Nebraska's Extreme Light Laboratory, BTN Live BIG (video), September 23, 2015.
Year of the Light, APS March Meeting (video), March 2, 2015.
"Compact Laser Generates Research-Quality X-rays," Photonics.com, Laurin Publishing, November 25, 2013.
"UNL Gains Grant to Expand Laser Research," Photonics.com, Laurin Publishing, October 4, 2010.
This is Nebraska: Diocles Laser Televised Segment on NET-Nebraska Television, Barry Kriha
Television Video - "Shrinking Tumor Killers," on Breakthroughs and Discoveries, broadcast in major U.S. cities, March, 2000.
Radio interview with Karen Fox on "Science Report" for the American Institute of Physics, broadcast on 200 stations around the U.S., June, 1996.
Radio interview with Jan Lublinski on DeutschlandRadio Koln, German National Radio, in the daily science-program "Forshung Aktuell" July, 1996.
"Criss-crossing Laser Beams Zoom Electrons Along," Ben Stein, Physics News Graphics, American Institute of Physics, December 22, 2003.
"Artist Wants to Paint Moon, But Physics May Foil Plan," Robert Roy Britt, Space.com, Aug. 10, 2001.
"A Cone of Coherent Light," Physical Review Focus 5, story 25, 2 June 2000.
"All-Optical Electron Injector," Physics News Update 563 #3, American Institute of Physics Bulletin of Physics News, October 31, 2001.
"Tabletop Laser Accelerators are Brighter and Faster," Physics News Update 510, American Institute of Physics Bulletin of Physics News, November 1, 2000.
"Laser Light In, 50-MeV Protons Out," Physics News Update 457, American Institute of Physics Bulletin of Physics News, November 15, 1999.
"Tabletop Laser Accelerators are On the Way" Physics News Update 260, American Institute of Physics Bulletin of Physics News, February 27, 1996.
"Relativistic Nonlinear Optics," Physics News Update 407, American Institute of Physics Bulletin of Physics News, December 17, 1998.
"Record High Laser Intensity," Physics News Update 270, American Institute of Physics Bulletin of Physics News, May 9, 1996.

Print Media

NU to partner in major defense research effort, Lincoln Journal Star Online, October 11, 2012.
Military contract could make NU a national player, Omaha World-Herald, October 11, 2012.
UNL launches laser, Algis Laukaitis, Lincoln Journal Star, August 26, 2006.
UNL to unveil high-intensity laser, Melissa Lee, Lincoln Journal Star, August 24, 2006.
Laser quest: World-class laser takes UNL to the final frontier-Extreme light, Nebraska Magazine, Fall 2006, 30-34.
UNL dedicates new world-class laser laboratory, UNL News Releases, August 25, 2006.
Exploring the final frontier-Extreme light, University of Nebraska Office of Research and Graduate Studies, 2005-2006.
University of Nebraska unveils world-class laser, Laser Focus World Online, August 28, 2006.
Building a World-Class Laser, University of Nebraska, Lincoln, College of Arts and Sciences Columns Newsletter, Winter 2007.
ULTRA FAST LASERS: Extreme Light Lab installs near-petawatt system, John Wallace, Laser Focus World, Volume 43, Issue 2, February 2007 (Cover Story)
Pioneering spirit, Editorial, Omaha World Herald, August 30, 2006.
"Table-top Laser Offers Alternative to Cyclotron," Technology World Briefs, Photonics Spectra, p. 50, January, 2000.
"Feedback," New Scientist, September 8, 2001, p. 120120.
"Shooting for the Moon," Samantha Amjadali, Sunday Herald Sun (Melbourne), Wired World, August 26, 2001, Sunday, Pg. 372.
"Let's all paint the Moon red," The Times (London), Anjana Ahuja, August 20, 2001, Monday.
"Tabletop Laser Accelerators are Brighter and Faster," Press Release of the 42^nd Annual Meeting of the American Physical Society Division of Plasma Physics (APS-DPP) with the 10^th International Congress on Plasma Physics (ICPP), November, 2000.
"Pushy Lasers Sweep Into Ion Race," Science News, Vol. 156, No. 23 December 4, 1999.
"Closing in on Cancer: A Cheap Proton Source Could Transform Radiotherapy," New Scientist, December 4, 1999.
"Ion Accelerators Shrink," Inside R&D, John Wiley & Sons, November 19, 1999.
"Table-Top Laser Accelerator May Soon Provide Alternative to Giant Cyclotrons," The University Record 55, The University of Michigan, November 15, 1999.
"Shedding New Light on Electrons," The Michigan Engineer, The University of Michigan College of Engineering, Spring/Summer 1999.
"Relativistic Nonlinear Thomson Scattering," Physics Today, p. 9, February issue, 1999.
"Observing Figure-8s," Optics and Photonics News, 10, No. 2, p. 9, February issue, 1999.
"Powerful Pulses Color Thomson Scattering," Science Magazine, 282, Number 5397, pp. 2166 - 2167, Issue of 18 Dec 1998.
"Femtosecond laser and x-ray streak camera probe matter in extreme conditions,"Laser Focus World, Newsbreaks, July 1998.
"Potent Laser Twirls Electron Figure Eights," Science News, 154, No. 25 & 26, Dec. 19 & 26, p. 390, 1998.
"Scientific Meetings Produce Clash of Agendas," Science Magazine, Oct. 30, 1997
"Lichtski mit Elektronen," GEO Magazin, pp. 156-157, May 1997
"Move Over, PC-Here Comes the Tabletop Accelerator" R & D Magazine, pp. 38-39, August 1996
"Revolution Chez les Accelerateurs de Particules," Sciences et Avenir, p. 92, June 1996
"Teilchen vom Laser beschleunigt," Frankfurter Allgemeine Zeitung, p. N3, April 10, 1996
"Hope Kindled For Table-Top Accelerators" New York Times, Science Times, p. C9, April 2, 1996
"Hope Kindled For Table-Top Accelerators," New York Times, Science Times: National Edition, p. B7, April 2, 1996
"Hope Kindled For Table-Top Accelerators, Corrections" New York Times, Science Times: National Edition, p. A2, April 3, 1996
"Tunnel Visions," The Economist, p. 83, March 16, 1996
"Surfing a Laser Wave," Science News, 149, p. 95, February 10, 1996
"Laser Beam Goes To New Lengths" R & D, p. 11, March 1996
Electronics Design, p. 23, March 18, 1996
"Big Future Seen for Small Units," Optical Materials and Engineering News, February 1, 1996
"U-M Scientists Discover Light at End of Tunnel," Ann Arbor News, p. B3, January 15, 1996
"The X-Ray Century," The Detroit News, p. E1, November 6, 1995
"Terawatt Lasers Generate X-Ray Continuum from Gold Target," Laser Focus World, p. 101, February 1995.