The X-ray emission of micro-capillary target irradiated by fs laser

2001 ◽  
Vol 11 (PR2) ◽  
pp. Pr2-421-Pr2-424
Author(s):  
F. Zhong ◽  
L. Qin ◽  
J. Deng ◽  
X. Hu ◽  
Y. Zhu ◽  
...  
Keyword(s):  
X Ray ◽  
Fs Laser

Demonstration of thin film compression for short-pulse X-ray generation

2019 ◽  
Vol 34 (34) ◽  
pp. 1943015
Author(s):  
D. M. Farinella ◽  
M. Stanfield ◽  
N. Beier ◽  
T. Nguyen ◽  
S. Hakimi ◽  
...  
Keyword(s):  
Thin Film ◽  
Imaging System ◽  
Short Pulse ◽  
Laser Pulses ◽  
Single Cycle ◽  
X Ray ◽  
Ultrafast Laser Pulses ◽  
Solid Density ◽  
Fs Laser ◽  
Gaussian Mode

Thin film compression to the single-cycle regime combined with relativistic compression offers a method to transform conventional ultrafast laser pulses into attosecond X-ray laser pulses. These attosecond X-ray laser pulses are required to drive wakefields in solid density materials which can provide acceleration gradients of up to TeV/cm. Here we demonstrate a nearly 99% energy efficient compression of a 6.63 mJ, 39 fs laser pulse with a Gaussian mode to 20 fs in a single stage. Further, it is shown that as a result of Kerr-lensing, the focal spot of the system is slightly shifted on-axis and can be recovered by translating the imaging system to the new focal plane. This implies that with the help of wave-front shaping optics the focusability of laser pulses compressed in this way can be partially preserved.

scholarly journals Efficient hard X-ray source using femtosecond plasma at solid targets with a modified surface

2004 ◽  
Vol 22 (3) ◽  
pp. 301-306 ◽  
Author(s):  
S.A. GAVRILOV ◽  
D.M. GOLISHNIKOV ◽  
V.M. GORDIENKO ◽  
A.B. SAVEL'EV ◽  
R.V. VOLKOV
Keyword(s):  
Experimental Data ◽  
Surface Layer ◽  
Laser Pulses ◽  
Hot Electron ◽  
High Contrast ◽  
X Ray ◽  
Corrugated Surface ◽  
Fs Laser ◽  
Modified Surface ◽  
Modified Surface Layer

Recent results on constructing of an efficient hard X-ray source using solid targets irradiated by high-contrast 200-fs laser pulses with an intensity above 1016W/cm2are presented. We used different solid targets with a laser- and electrochemically modified surface layer: craters, pyramidal cavities, porous silicon, gratings. Experimental data obtained confirms that using solid targets with a corrugated surface one can achieve a prominent increase both in the efficiency of hard X-ray generation (in the quanta range 2–30 keV) and in the hot electron temperature of plasma.

Enhancement of soft x-ray emission from a cryogenically cooled Ar gas jet irradiated by 25 fs laser pulse

2000 ◽  
Vol 76 (14) ◽  
pp. 1819-1821 ◽  
Author(s):  
T. Mocek ◽  
C. M. Kim ◽  
H. J. Shin ◽  
D. G. Lee ◽  
Y. H. Cha ◽  
...  
Keyword(s):  
Laser Pulse ◽  
Gas Jet ◽  
X Ray ◽  
Fs Laser ◽  
Ar Gas

Study on Initial Process of fs Laser Ablation Dynamics by using Soft x-ray Laser Probe

2016 ◽  
Author(s):  
M. Nishikino ◽  
N. Hasegawa ◽  
N. Ohnishi ◽  
A. M. Ito ◽  
Y. Minami ◽  
...  
Keyword(s):  
Laser Ablation ◽  
Laser Probe ◽  
X Ray ◽  
Fs Laser ◽  
Initial Process

Observation of fs-laser spallative ablation using soft X-ray laser probe

2017 ◽  
Author(s):  
Masaharu Nishikino ◽  
Noboru Hasegawa ◽  
Takuro Tomita ◽  
Yasuo Minami ◽  
Takashi Eyama ◽  
...  
Keyword(s):  
Laser Probe ◽  
X Ray ◽  
Fs Laser

Coherent 0.5-keV X-Ray Emission from Helium Driven by a Sub-10-fs Laser

1998 ◽  
Vol 80 (15) ◽  
pp. 3236-3239 ◽  
Author(s):  
M. Schnürer ◽  
Ch. Spielmann ◽  
P. Wobrauschek ◽  
C. Streli ◽  
N. H. Burnett ◽  
...  
Keyword(s):  
X Ray ◽  
Fs Laser

X-ray polarization-dependent measurements of solid-density plasmas generated by fs laser pulses

2007 ◽  
Vol 3 (1-2) ◽  
pp. 297-301 ◽  
Author(s):  
F. Zamponi ◽  
A. Lübcke ◽  
T. Kämpfer ◽  
I. Uschmann ◽  
E. Förster ◽  
...  
Keyword(s):  
Laser Pulses ◽  
X Ray ◽  
Solid Density ◽  
Fs Laser

scholarly journals All Femtosecond Optical Pump and X-Ray Probe: Holey-Axicon for Free Electron Laser

2020 ◽  
Author(s):  
Vijayakumar Anand ◽  
Jovan Maksimovic ◽  
Tomas Katkus ◽  
Soon Hock Ng ◽  
Orestas Ulcinas ◽  
...  
Keyword(s):  
Free Electron ◽  
Free Electron Laser ◽  
Optical Axis ◽  
Bessel Beam ◽  
X Rays ◽  
Temporal Dimension ◽  
Optical Elements ◽  
Optical Pump ◽  
X Ray ◽  
Fs Laser

We put forward a co-axial pump(optical)-probe(X-rays) experimental concept and show performance of the optical component. A Bessel beam generator with a central 100 micrometers-diameter hole (on the optical axis) was fabricated using femtosecond (fs) laser structuring inside a silica plate. This flat-axicon optical element produces a needle-like axial intensity distribution which can be used for the optical pump pulse. The fs-X-ray free electron laser (X-FEL) beam of sub-1 micrometer diameter can be introduced through the central hole along the optical axis onto a target as a probe. Different realisations of optical pump are discussed. Such optical elements facilitate alignment of ultra-short fs-pulses in space and time and can be used in light-matter interaction experiments at extreme energy densities on the surface and in the volume of targets. Full advantage of ultra-short 10 fs X-FEL probe pulses with fs-pump(optical) opens an unexplored temporal dimension of phase transitions and the fastest laser-induced rates of material heating and quenching. A wider field of applications of fs-laser-enabled structuring of materials and design of specific optical elements for astrophotonics is presented.

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