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Nature Photonics, ISSN 1749-4885, 03/2008, Volume 2, Issue 3, pp. 165 - 169
For a fundamental understanding of ultrafast dynamics in chemistry, biology and materials science it has been a long-standing dream to record a molecular movie... 
VACUUM | PHYSICS, APPLIED | OPERATION | EXTREME-ULTRAVIOLET | FREE-ELECTRON LASER | DYNAMICS | GENERATION | OPTICS | BOND | RADIATION | PULSES | RAYS | Fysik | Physical Sciences | Naturvetenskap | Natural Sciences
Journal Article
Nature Photonics, ISSN 1749-4885, 08/2012, Volume 6, Issue 8, pp. 540 - 544
The free-electron laser, first proposed by Madey(1) in 1971, has significantly reduced laser wavelengths to the vacuum ultraviolet(2,3) and soft X-ray... 
PHYSICS, APPLIED | STIMULATED-EMISSION | AMPLIFIED SPONTANEOUS EMISSION | OPERATION | EXTREME-ULTRAVIOLET | MAGNETIC-FIELD | WATER WINDOW | OPTICS | RADIATION | GAIN | Pulse duration | Emittance | Soft x-rays | Wavelengths | Free electron lasers | Lasers | X-rays | Coherent light
Journal Article
Journal of the Physical Society of Japan, ISSN 0031-9015, 03/2016, Volume 85, Issue 3, pp. 1 - 1
  Previous experimental studies of superradiance (SR) in multi-level systems have been explainable using the predictions of the well-known simple two-level SR... 
Atoms & subatomic particles | Simulation | Helium | Phase transitions | Helium atoms | Wavelengths | Free electron lasers | Mathematical models | Excitation
Journal Article
Journal of the Physical Society of Japan, ISSN 0031-9015, 05/2015, Volume 84, Issue 5, pp. 1 - 1
  In this paper, we report the results of measurements of the intensities and delays of super-radiance decays from excited helium atoms at multiple... 
Atomic physics | Ultraviolet radiation | Helium | Phase transitions | Waveform analysis | Gas density | Wavelengths | Accelerators | Free electron lasers | Decay | Excitation | Delay
Journal Article
Optics Express, ISSN 1094-4087, 10/2012, Volume 20, Issue 21, pp. 23174 - 23179
Extreme ultraviolet (EUV) fluorescence emitted from Ar clusters irradiated by intense EUV free electron laser (FEL) pulses has been investigated. The EUV... 
RADIATION | PHYSICS | OPTICS | Electron Transport - radiation effects | Models, Chemical | Lasers | Computer Simulation | Light | Fluorescence | Argon - chemistry | Argon - radiation effects | Electrons | Index Medicus
Journal Article
Physical Review Letters, ISSN 0031-9007, 07/2013, Volume 111, Issue 4, pp. 043001 - 043001
X-ray fluorescence spectroscopy demonstrates that a single core-hole krypton with a 170-as lifetime can be photoionized again to a double core-hole state by an... 
FREE-ELECTRON LASER | ATOMS | ANOMALOUS DIFFRACTION | PHYSICS, MULTIDISCIPLINARY | FEMTOSECOND LASER | PULSES
Journal Article
Optics Express, ISSN 1094-4087, 01/2011, Volume 19, Issue 1, pp. 317 - 324
The 13th harmonic of a Ti:sapphire (Ti:S) laser in the plateau region was injected as a seeding source to a 250-MeV free-electron-laser (FEL) amplifier. When... 
OPERATION | LIGHT | COHERENT X-RAYS | GENERATION | WATER WINDOW | INTENSE | SPECTRUM | OPTICS | SOFT | REGION | PULSES
Journal Article
Journal Article
Journal of Physics B: Atomic, Molecular and Optical Physics, ISSN 0953-4075, 08/2013, Volume 46, Issue 16, pp. 164021 - 1-5
Using the third harmonic of the FEL radiation from the SPring-8 compact SASE (self-amplified stimulated emission) source SCSS we have studied the effects on... 
RADIATIVE DECAY | FREE-ELECTRON-LASER | HE ATOMS | PHYSICS, ATOMIC, MOLECULAR & CHEMICAL | OPTICS | CROSS-SECTION | IONIZATION | Stimulated emission | Wave propagation | Wavelengths | Ionization | Coherence | Excitation | Helium | Cross sections (physics)
Journal Article
Optics Express, ISSN 1094-4087, 11/2013, Volume 21, Issue 22, pp. 26363 - 26375
We present an extended theoretical background of so-called fluence scan (f-scan or F-scan) method, which is frequently being used for offline characterization... 
DENSITY | FREE-ELECTRON LASER | OPTICS | LUMINESCENCE | RADIATION | REGION
Journal Article
Physical Review Letters, ISSN 0031-9007, 11/2011, Volume 107, Issue 19, pp. 193603 - 193603
We have observed and characterized 501.6 nm collective spontaneous emission (superfluorescence) following 1s(2) --> 1s3p excitation of helium atoms by 53.7 nm... 
TABLE | PHYSICS, MULTIDISCIPLINARY | OPERATION | X-RAY LASERS | SUPERRADIANCE | EXTREME-ULTRAVIOLET | COHERENT | ATOMS | RADIATION | HELIUM
Journal Article
Physical Review A - Atomic, Molecular, and Optical Physics, ISSN 1050-2947, 11/2011, Volume 84, Issue 5
Journal Article
Journal of the Physical Society of Japan, ISSN 0031-9015, 2016, Volume 85, Issue 3, p. 34301
Previous experimental studies of superradiance (SR) in multi-level systems have been explainable using the predictions of the well-known simple two-level SR... 
SODIUM | ENERGY | SUPER-RADIANCE | PHYSICS, MULTIDISCIPLINARY | SUPERFLUORESCENCE | PULSE | DICKE SUPERRADIANCE | FREE-ELECTRON LASER | ATOMS | RADIATION | COHERENCE
Journal Article
Journal of Physics B: Atomic, Molecular and Optical Physics, ISSN 0953-4075, 05/2015, Volume 48, Issue 10, pp. 105002 - 9
We report the observation of superfluourescence at wavelengths (in air) of 501.6 nm, 667.8 nm, and 728.1 nm following the excitation of helium atoms with... 
SINGLE | superfluorescence | quantum optics | PHYSICS, ATOMIC, MOLECULAR & CHEMICAL | free-electron laser | MODEL | OPTICS | EMISSION | Emittance | Streak cameras | Helium atoms | Wavelengths | Free electron lasers | Decay | Superfluorescence | Excitation
Journal Article
Physical Review E - Statistical, Nonlinear, and Soft Matter Physics, ISSN 1539-3755, 10/2012, Volume 86, Issue 4, pp. 042901 - 042901
We have investigated the progress of structural distortions in DNA molecules by single-shot coherent diffraction using extreme-ultraviolet radiation from a... 
RAY | PHYSICS, MATHEMATICAL | OPERATION | PHYSICS, FLUIDS & PLASMAS | Crystallography, X-Ray - methods | Microscopy - methods | DNA - chemistry | Ultraviolet Rays | Lasers | Photons | Optics and Photonics | Radiation Protection - methods | DNA - radiation effects | Normal Distribution | Electrons | Index Medicus
Journal Article
Journal of the Physical Society of Japan, ISSN 0031-9015, 05/2015, Volume 84, Issue 5, p. 54301
In this paper, we report the results of measurements of the intensities and delays of super-radiance decays from excited helium atoms at multiple wavelengths.... 
SODIUM | VAPOR | PHYSICS, MULTIDISCIPLINARY | LASER | DICKE SUPERRADIANCE
Journal Article
Optics Express, ISSN 1094-4087, 02/2012, Volume 20, Issue 4, pp. 3424 - 3433
Optical features of point defects photoluminescence in LiF crystals, irradiated by soft X-ray pulses of the Free Electron Laser with wavelengths of 17.2 - 61.5... 
POINT-DEFECTS | OPTICS | LITHIUM-FLUORIDE CRYSTALS | CENTERS | PLASMA SOURCE | COLOR-CENTER FORMATION
Journal Article
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