Petawatt and exawatt class lasers worldwide

For the first time, a global model of electromagnetic pulse (EMP) emission connects charge separation in the laser target to quantitative measurements of the electromagnetic field. We present a frequency-domain dipole antenna model which predicts the quantity of charge accumulated in a laser target as well as the EMP amplitude and frequency. The model is validated against measurements from several high-intensity laser facilities, providing insight into target physics and informing the design of next-generation ultra-intense laser facilities. EMP amplitude is proportional to the total charge accumulated on the target, but we demonstrate that it is not directly affected by target charging time (and therefore the laser pulse duration) provided the charging time is shorter than the antenna characteristic time. We propose two independent methods for estimating the charging time based on the laser pulse duration. We also investigate the impact of target holder geometry on EMPs using cylindrical, conical and helical holders. Published as: Minenna et al., Phys. Plasmas, 27, 063102 (2020), https://doi.

show abstract

“…According to Eqs. (1) and (2), the charge should be Q = 407 nC -just 1.5 times larger than in the experiment.…”

Section: Estimating the Target Charge From Magnetic Field Measuremmentioning

confidence: 61%

Electromagnetic pulse emission from target holders during short-pulse laser interactions

et al. 2020

View full text Add to dashboard Cite

show abstract

“…Significant advances in ultraintense and ultrashort laser technology have led numerous laboratories around the world to develop table-top PW-class laser systems as a means of investigating laser-matter interactions in relativistic regime [1,2] . The repetition rate of PW-class femtosecond lasers is an important issue for their practical applications.…”

Section: Introductionmentioning

confidence: 99%

“…Moreover, the scalability to higher peak power is another key issue for strong field physics in ultrarelativistic regime. The next-generation PW-class laser projects have already been proposed and constructed worldwide, which include Extreme Light Infrastructure, Apollon-10 PW laser, Vulcan-10 PW laser, and so on [2,10] . In the near future, the focused laser intensity will probably exceed 10 22 W/cm 2 and reach 10 23 W/cm 2 based on the 10 PW-class lasers above.…”

Section: Introductionmentioning

confidence: 99%

The laser beamline in SULF facility

Zhang

et al. 2020

High Pow Laser Sci Eng

Self Cite

View full text Add to dashboard Cite

In this paper, we report the recent progress on the $1~\text{PW}/0.1~\text{Hz}$ laser beamline of Shanghai Superintense Ultrafast Laser Facility (SULF). The SULF-1 PW laser beamline is based on the double chirped pulse amplification (CPA) scheme, which can generate laser pulses of 50.8 J at 0.1 Hz after the final amplifier; the shot-to-shot energy fluctuation of the amplified pulse is as low as 1.2% (std). After compression, the pulse duration of 29.6 fs is achieved, which can support a maximal peak power of 1 PW. The contrast ratio at $-80~\text{ps}$ before main pulse is measured to be $2.5\times 10^{-11}$ . The focused peak intensity is improved by optimizing the angular dispersion in the grating compressor. The maximal focused peak intensity can reach $2.7\times 10^{19}~\text{W}/\text{cm}^{2}$ even with an $f/26.5$ off-axis parabolic mirror. The horizontal and vertical angular pointing fluctuations in 1 h are measured to be 1.89 and $2.45~\unicode[STIX]{x03BC}\text{rad}$ , respectively. The moderate repetition rate and the good stability are desirable characteristics for laser–matter interactions. The SULF-1 PW laser beamline is now in the phase of commissioning, and preliminary experiments of particle acceleration and secondary radiation under 300–400 TW/0.1 Hz laser condition have been implemented. The progress on the experiments and the daily stable operation of the laser demonstrate the availability of the SULF-1 PW beamline.

show abstract

“…Over the past two decades, significant progress in short-pulse high-power laser technology has resulted in the development of petawatt-class lasers [1][2][3][4][5][6][7][8][9][10][11][12], ten petawatt-class lasers [13][14][15][16][17][18]. Even higher power laser systems have been proposed [19].…”

Section: Introductionmentioning

confidence: 99%

Characterizing extreme laser intensities by ponderomotive acceleration of protons from rarified gas

et al. 2020

View full text Add to dashboard Cite

A new method to diagnose extreme laser intensities through measurement of angular and spectral distributions of protons directly accelerated by the laser focused into a rarefied gas is proposed. We simulated a laser pulse focused by an off-axis parabolic mirror by Stratton-Chu integrals, that enables description of laser pulse with different spatial-temporal profiles focusing in a focal spot down to the diffraction limit, that makes our theoretical predictions be a basis for experimental realization. The relationship between characteristics of the proton distributions and parameters of the laser pulse have been analyzed. The analytical and numerical results obtained justify the new method of laser diagnostics. The proposed scheme should be valuable for the commissioning of new extreme intensity laser facilities.

show abstract

Petawatt and exawatt class lasers worldwide

Cited by 782 publications

References 360 publications

Electromagnetic pulse emission from target holders during short-pulse laser interactions

Electromagnetic pulse emission from target holders during short-pulse laser interactions

The laser beamline in SULF facility

Characterizing extreme laser intensities by ponderomotive acceleration of protons from rarified gas

Contact Info

Product

Resources

About