Dynamics of laser-driven heavy-ion acceleration clarified by ion charge states

Nishiuchi, Mamiko; Dover, N. P.; Hata, Masayuki; Sakaki, H.; Kondo, K.; Lowe, Hazel; Miyahara, Tetsuhiro; Kiriyama, Hiromitsu; Koga, James; Iwata, N.; Alkhimova, M. A.; Pirozhkov, Alexander S.; Faenov, A. Ya.; Pikuz, T. A.; Sagisaka, A.; Watanabe, Yukinobu; Kobayashi, Masaki; Kondo, Kotaro; Ditter, E. J.; Ettlinger, Oliver C.; Hicks, George; Najmudin, Z.; Ziegler, Tim; Zeil, Karl; Schramm, U.; Sentoku, Y.

doi:10.1103/physrevresearch.2.033081

Cited by 45 publications

(33 citation statements)

References 58 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This program is now actively undertaken at Kansai Photon Science Institute (KPSI) of National Institutes of Quantum and Radiological Science and Technology (QST) over broad fields such as high-power lasers, 64 x-ray lasers, 43,65 x-ray generation, 66 high field science 67 and particle acceleration. 68 Among various approaches to generation of coherent radiation in the EUV and x-ray regions, the plasmabased x-ray lasers will have new possibilities for development by utilizing the technologies and concepts that are now available.…”

Section: Discussionmentioning

confidence: 99%

X-ray laser development at the Institute of Laser Engineering, Osaka University with worldwide collaboration

Kato

Daido

2021

International Conference on X-Ray Lasers 2020

View full text Add to dashboard Cite

This paper presents a brief review of the x-ray laser development at the Institute of Laser Engineering, Osaka University, implemented with worldwide collaboration. The scaling of the x-ray lasing toward shorter wavelengths has been investigated in the recombination-pumped (RP) and electron-collisional-excitation (CE) pumped x-ray lasers. Extension of the RP x-ray laser close to the water window is described. With the CE x-ray laser, intense lasing of the J = 0-1 line at 19.6 nm in the neon-like Ge ion and lasing over 14.3 -4.5 nm with the nickel-like ions are reported. Spectroscopic studies of the x-ray lasers are described, including the first observation of polarization of the x-ray laser beam generated by amplified spontaneous emission. The perspective of the plasma-based x-ray lasers is also presented.

show abstract

Section: Discussionmentioning

confidence: 99%

X-ray laser development at the Institute of Laser Engineering, Osaka University with worldwide collaboration

Kato

Daido

2021

International Conference on X-Ray Lasers 2020

View full text Add to dashboard Cite

show abstract

“…Assuming a gold foil thickness of 500 nm, we derive a total electron number of N = Z • 4.4 × 10 11 and end up with a probability of about 4 % for the ionization from 51 + to 52 + and of about 0.6 % for the ionization from 69 + to 70 + . The influence of a possible return current from regions surrounding the focal spot as discussed in [28], which could potentiate the number of contributing electrons, in particular at low kinetic energies, and thus the ionization probabilities, has not yet been considered. Fig.…”

Section: Lasermentioning

confidence: 99%

Charge-state resolved laser acceleration of gold ions to beyond 7 MeV/u

Lindner,

Fitzpatrick,

Haffa

et al. 2021

Preprint

View full text Add to dashboard Cite

In the past years, the interest in the laser-driven acceleration of heavy ions in the mass range of A ≈ 200 has been increasing due to promising application ideas like the fission-fusion nuclear reaction mechanism, aiming at the production of neutron-rich isotopes relevant for the astrophysical r -process nucleosynthesis. In this paper, we report on the laser acceleration of gold ions to beyond 7 MeV/u, exceeding for the first time an important prerequisite for this nuclear reaction scheme. Moreover, the gold ion charge states have been detected with an unprecedented resolution, which enables the separation of individual charge states up to 4 MeV/u. The recorded charge-state distributions show a remarkable dependency on the target foil thickness and differ from simulations, lacking a straight-forward explanation by the established ionization models.Promising application perspectives for laser-accelerated heavy ions in the mass range of A ≈ 200 led to an awakening interest in laser-based heavy ion acceleration. Since 2015, multiple experimental papers reported on progress in laser-driven acceleration of gold ions, pushing the achieved kinetic energies from 1 MeV/u [1] to 5 MeV/u [2] to finally 6.1 MeV/u [3]. This evolution has been accompanied by several simulations [4-6], which especially studied the expected gold ion charge-state distributions based on the established models of tunnel and electron impact ionization.With this paper, we pursue the long-term goal of realizing the fission-fusion reaction mechanism proposed already a decade ago [7]. This aims at the production of extremely neutron-rich isotopes close to the waiting point of the rapid neutron capture (r -)process at the magic neutron number N = 126 [8], which is a decisive region for the astrophysical nucleosynthesis of the heaviest elements in the Universe. The fission-fusion reaction mechanism is a two-step process, which is expected to be enabled to occur when ultra-dense bunches of laser-accelerated heavy, fissile ions (like 232 Th) with kinetic energies above the fission barrier impinge on a target consisting of the same material. In a first step, both projectile and target ions undergo fission. Afterwards, fusion of fission fragments may happen, in case of fusion between two light fission fragments the desired neutron-rich r -process isotopes are formed. This reaction scheme requires the application of laser-accelerated heavy ion bunches owing to their ultra-high, almost solid-state-like density which is expected when accelerating in the regime of radiation pressure acceleration (RPA) [9][10][11][12]. The densities of ion bunches delivered by conventional accelerators are orders of magnitude lower and thus insufficient to

show abstract

“…In particular, the generation of carbon ions with energy 4 MeV/n and 10% energy bandwidth is being studied as an ion source for an injector for a future cancer radiotherapy accelerator at QST. The generation of high-energy, highly charged, heavy ion beams was also investigated, with a focus on understanding the ionization mechanism, which is extremely important for the control of laser-driven heavy ion beams [54]. Electron acceleration is also being studied with a goal of downsizing X-ray free-electron laser facilities.…”

Section: Applications With the J-karen-p Laser Systemmentioning

confidence: 99%

Petawatt Femtosecond Laser Pulses from Titanium-Doped Sapphire Crystal

et al. 2020

Self Cite

View full text Add to dashboard Cite

Ultra-high intensity femtosecond lasers have now become excellent scientific tools for the study of extreme material states in small-scale laboratory settings. The invention of chirped-pulse amplification (CPA) combined with titanium-doped sapphire (Ti:sapphire) crystals have enabled realization of such lasers. The pursuit of ultra-high intensity science and applications is driving worldwide development of new capabilities. A petawatt (PW = 1015 W), femtosecond (fs = 10−15 s), repetitive (0.1 Hz), high beam quality J-KAREN-P (Japan Kansai Advanced Relativistic ENgineering Petawatt) Ti:sapphire CPA laser has been recently constructed and used for accelerating charged particles (ions and electrons) and generating coherent and incoherent ultra-short-pulse, high-energy photon (X-ray) radiation. Ultra-high intensities of 1022 W/cm2 with high temporal contrast of 10−12 and a minimal number of pre-pulses on target has been demonstrated with the J-KAREN-P laser. Here, worldwide ultra-high intensity laser development is summarized, the output performance and spatiotemporal quality improvement of the J-KAREN-P laser are described, and some experimental results are briefly introduced.

show abstract

Dynamics of laser-driven heavy-ion acceleration clarified by ion charge states

Cited by 45 publications

References 58 publications

X-ray laser development at the Institute of Laser Engineering, Osaka University with worldwide collaboration

X-ray laser development at the Institute of Laser Engineering, Osaka University with worldwide collaboration

Charge-state resolved laser acceleration of gold ions to beyond 7 MeV/u

Petawatt Femtosecond Laser Pulses from Titanium-Doped Sapphire Crystal

Contact Info

Product

Resources

About