scholarly journals A Custom-Tailored Multi-TW Optical Electric Field for Gigawatt Soft-X-Ray Isolated Attosecond Pulses

2021 ◽  
Vol 2021 ◽  
pp. 1-13
Author(s):  
Bing Xue ◽  
Yuuki Tamaru ◽  
Yuxi Fu ◽  
Hua Yuan ◽  
Pengfei Lan ◽  
...  
Keyword(s):  
Peak Power ◽  
Attosecond Pulse ◽  
High Peak Power ◽  
Pulse Source ◽  
Gas Cell ◽  
X Ray ◽  
Isolated Attosecond Pulse ◽  
Waveform Synthesis ◽  
Time Region ◽  
Limited Duration

Since the first isolated attosecond pulse was demonstrated through high-order harmonics generation (HHG) in 2001, researchers’ interest in the ultrashort time region has expanded. However, one realizes a limitation for related research such as attosecond spectroscopy. The bottleneck is concluded to be the lack of a high-peak-power isolated attosecond pulse source. Therefore, currently, generating an intense attosecond pulse would be one of the highest priority goals. In this paper, we review our recent work of a TW-class parallel three-channel waveform synthesizer for generating a gigawatt-scale soft-X-ray isolated attosecond pulse (IAP) using HHG. By employing several stabilization methods, we have achieved a stable 50 mJ three-channel optical-waveform synthesizer with a peak power at the multi-TW level. This optical-waveform synthesizer is capable of creating a stable intense optical field for generating an intense continuum harmonic beam thanks to the successful stabilization of all the parameters. Furthermore, the precision control of shot-to-shot reproducible synthesized waveforms is achieved. Through the HHG process employing a loose-focusing geometry, an intense shot-to-shot stable supercontinuum (50–70 eV) is generated in an argon gas cell. This continuum spectrum supports an IAP with a transform-limited duration of 170 as and a submicrojoule pulse energy, which allows the generation of a GW-scale IAP. Another supercontinuum in the soft-X-ray region with higher photon energy of approximately 100–130 eV is also generated in neon gas from the synthesizer. The transform-limited pulse duration is 106 as. Thus, the enhancement of HHG output through optimized waveform synthesis is experimentally proved.

scholarly journals CLEO '90/IQEC '90 Report III. High peak power lasers, X-ray lasers, ICF lasers, gas lasers.

1990 ◽  
Vol 18 (7) ◽  
pp. 515-528
Author(s):  
Yoshiaki KATO ◽  
Tadashi KANABE ◽  
Yoshiro OWADANO ◽  
Masayuki KAKEHATA ◽  
Fumihiko KANNARI ◽  
...  
Keyword(s):  
Peak Power ◽  
High Peak ◽  
High Peak Power ◽  
X Ray ◽  
Gas Lasers

scholarly journals Development Of Robust Multilayer Optics For Use In High-Peak Power Radiation Environments

1993 ◽  
Vol 306 ◽  
Author(s):  
Brian J. Macgowan ◽  
S. Mrowka ◽  
T. W. Barbee ◽  
L. B. DA SILVA ◽  
D.C. EDER ◽  
...  
Keyword(s):  
Short Wavelength ◽  
Peak Power ◽  
High Peak ◽  
High Peak Power ◽  
X Rays ◽  
Severe Problem ◽  
X Ray ◽  
Multilayer Mirror ◽  
Power Radiation ◽  
Mirror Mirror

AbstractIn many applications, x-ray mulhilayer mirrors are exposed to high peak fluxes of x-rays with subsequent damage to the mirror. Mirror damage is a particularly severe problem with the use of multilayers as cavity optics for short wavelength x-ray lasers. Intense optical and x-ray radiation, from the x-ray laser plasma amplifier, often damages the multilayer mirror on time scales of hundreds of picoseconds. The phenomenon of multilayer mirror damage by pulsed xray emission has been studied using short duration (500 psec) bursts of soft x-rays from a laser produced gold plasma. The results of the experiments will be compared with some simple models and the possibility of increasing the damage thresholds of short wavelength multilayer mirrors will be discussed.

scholarly journals For the generation of an intense isolated pulse in hard X-ray region using X-ray free electron laser

2012 ◽  
Vol 30 (3) ◽  
pp. 397-406 ◽  
Author(s):  
Sandeep Kumar ◽  
Heung-Sik Kang ◽  
Dong-Eon Kim
Keyword(s):  
Free Electron ◽  
Free Electron Laser ◽  
Electron Bunch ◽  
Attosecond Pulse ◽  
Current Profile ◽  
Distribution Profile ◽  
X Ray ◽  
Isolated Attosecond Pulse ◽  
Pump Probe Experiment ◽  
Pal Xfel

AbstractFor a real, meaningful pump-probe experiment with attosecond temporal resolution, an intense isolated attosecond pulse is in demand. For that purpose we report the generation of an intense isolated attosecond pulse, especially in X-ray region using a current-enhanced self-amplified spontaneous emission in a free electron laser (FEL). We use a few cycle laser pulse to manipulate the electron-bunch inside a two-period planar wiggler. In our study, we employ the electron beam parameters of Pohang Accelerator Laboratory (PAL)-XFEL. The RF phase effect of accelerator columns on the longitudinal energy distribution profile and current profile of electron-bunch is also studied, aiming that these results can be experimentally realized in PAL-XFEL. We show indeed that the manipulation of electron-energy bunch profile may lead to the generation of an isolated attosecond hard X-ray pulse: 150 attosecond radiation pulse at 0.1 nm wavelength can be generated.

The advent of X-ray free electron lasers

Photoniques ◽  
2021 ◽  
pp. 22-26
Author(s):  
Marie-Emmanuelle Couprie
Keyword(s):  
Free Electron ◽  
Peak Power ◽  
Short Pulse ◽  
Far Infrared ◽  
Gain Medium ◽  
High Peak Power ◽  
X Rays ◽  
Free Electron Lasers ◽  
Free Electrons ◽  
X Ray

Free Electron Lasers (FEL) use free electrons in the periodic permanent magnetic field of an undulator as a gain medium. They extend from far infrared to X-rays, they are easily tunable and provide a high peak power. The advent of tunable intense (few mJ) short pulse (down to the attosecond regime) FELs with record multi GW peak power in the X-ray domain enables to explore new scientific areas. These unprecedent X-ray sources come along with versatile performance.

scholarly journals Two-dimensional imaging detectors for structural biology with X-ray lasers

2014 ◽  
Vol 369 (1647) ◽  
pp. 20130334 ◽  
Author(s):  
Peter Denes
Keyword(s):  
Structural Biology ◽  
Peak Power ◽  
State Of The Art ◽  
High Peak Power ◽  
Free Electron Lasers ◽  
X Ray ◽  
The Past ◽  
Current State ◽  
Pixel Detectors ◽  
Imaging Detectors

Our ability to harness the advances in microelectronics over the past decade(s) for X-ray detection has resulted in significant improvements in the state of the art. Biology with X-ray free-electron lasers present daunting detector challenges: all of the photons arrive at the same time, and individual high peak power pulses must be read out shot-by-shot. Direct X-ray detection in silicon pixel detectors—monolithic or hybrid—are the standard for XFELs today. For structural biology, improvements are needed for today's 10–100 Hz XFELs, and further improvements are required for tomorrow's 10+ kHz XFELs. This article will discuss detector challenges, why they arise and ways to overcome them, along with the current state of the art.

Intense X-ray isolated attosecond pulse generation by using low-intensity chirped pulse combined with a UV seeding pulse

2019 ◽  
Vol 33 (24) ◽  
pp. 1950286
Author(s):  
Yi Li ◽  
R. S. Castle ◽  
Liqiang Feng
Keyword(s):  
Pulse Duration ◽  
Delay Time ◽  
Pulse Generation ◽  
Attosecond Pulse ◽  
Resonance Ionization ◽  
X Ray ◽  
Chirped Pulse ◽  
Low Intensity ◽  
High Order Harmonic ◽  
Isolated Attosecond Pulse

We theoretically investigate intense isolated attosecond pulse (IAP) generation from high-order harmonic generation (HHG) driven by a low-intensity chirped pulse combined with a UV seeding pulse. The results show that, driven by a two-color chirped pulse, the harmonic cutoff can be remarkably extended and a spectral continuum in X-ray region can be obtained. Moreover, as the pulse duration increases or the delay time of the two pulses changes, a larger harmonic cutoff can be found. Further, with the introduction of a UV seeding pulse, the efficiency of HHG can be enhanced by three orders of magnitudes due to the UV resonance ionization. Moreover, as the UV pulse intensity increases, the enhanced ratio of HHG yield can be further improved. The enhancement of HHG yield is related to the pulse duration and delay time of the UV pulse. For instance, when adding a shorter duration UV pulse, the enhancement of HHG is dependent on the delay time of the UV pulse. However, when adding a longer duration UV pulse, the HHG enhancement is not very sensitive to the delay time of the UV pulse. Finally, the obtained spectral continuum supports the generation of intense IAP with the duration of 36 as.

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