scholarly journals Large-area suspended graphene as a laser target to produce an energetic ion beam

2017 ◽  
Vol 5 ◽  
Author(s):  
Nur Khasanah ◽  
Nima Bolouki ◽  
Tzu-Yao Huang ◽  
Yi-Zhe Hong ◽  
Wen-Liang Chung ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Ion Beam ◽  
Ion Sources ◽  
Intense Laser ◽  
Solid Target ◽  
Intense Laser Pulse ◽  
Large Area ◽  
Proton Radiography ◽  
Laser Target ◽  
Suspended Graphene

Proton radiography is a key diagnostics to measure and image the electric/magnetic field in laser-produced plasmas. A thin solid target is irradiated with an intense laser pulse to produce a proton beam. The accelerated proton can achieve higher energy with thinner target. In order to produce an extremely thin target, we have developed a large-area suspended graphene as a laser target for energetic ion sources. We describe the manufacturing process of the suspended graphene, and show the results of quality evaluations.

Graphene under extreme electromagnetic field: energetic ion acceleration by direct irradiation of ultra intense laser on few layer suspended graphene

2021 ◽  
Author(s):  
Yasuhiro Kuramitsu ◽  
Takumi Minami ◽  
Takamasa Hihara ◽  
Kentaro Sakai ◽  
Takahiro Nishimoto ◽  
...  
Keyword(s):  
Electromagnetic Field ◽  
Atomic Layer ◽  
High Repetition Rate ◽  
Intense Laser ◽  
Ion Acceleration ◽  
Large Area ◽  
Suspended Graphene ◽  
Thin Target ◽  
Direct Irradiation ◽  
Thermally Conductive

Abstract Atomically thin graphene is a transparent, highly electrically and thermally conductive, light-weight, and the strongest material. To date, graphene has found applications in many aspects including transport, medicine, electronics, energy, defense, and desalination. We demonstrate another disruptive application of graphene in the field of laser-ion acceleration, in which the unique features of graphene play indispensable role. Laser driven ion sources have been widely investigated for pure science, plasma diagnostics, medical and engineering applications. Recent developments of laser technologies allow us to access radiation regime of laser ion acceleration with relatively thin targets. However, the thinner target is the less durable and can be easily broken by the pedestal or prepulse through impact and heating prior to the main laser arrival. One of the solutions to avoid this is plasma mirror, which is a surface plasma created by the foot of the laser pulse on an optically transparent material working as an effective mirror only for the main laser peak. So far diamond like carbon (DLC) is used to explore the ion acceleration in extremely thin target regime (< 10 nm) with plasma mirrors, and it is necessary to use plasma mirrors even in moderately thin target regime (10-100 nm) to realize energetic ion generation. However, firstly DLC is not 2D material, and therefore, it is very expensive to make it thin and flat. Moreover, graphene is stronger than diamond at extremely thin regime, and much more reasonable for mass-production. Furthermore, installing and operating plasma mirrors at high repetition rate is also costly. Here we show another direct solution using graphene as the thinnest and strongest target ever made. We develop a facile transfer method to fabricate large-area suspended graphene (LSG) as target for laser ion acceleration with precision down to a single atomic layer. Direct irradiation of the LSG targets with an ultra intense laser generates energetic carbons and protons evidently showing the durability of graphene without plasma mirror. This extends the new frontier of science on graphene under extreme electromagnetic field, such as energy frontier and nuclear fusion.

Effect of obliquely external magnetic field on the intense laser pulse propagating in plasma medium

2020 ◽  
Vol 34 (07) ◽  
pp. 2050044
Author(s):  
Mehdi Abedi-Varaki
Keyword(s):  
Magnetic Field ◽  
External Magnetic Field ◽  
Laser Pulse ◽  
Magnetoactive Plasma ◽  
Spot Size ◽  
The Self ◽  
Intense Laser ◽  
Intense Laser Pulse ◽  
Laser Spot Size ◽  
Self Focusing

In this paper, self-focusing of intense laser pulse propagating along the obliquely external magnetic field on the collisional magnetoactive plasma by using the perturbation theory have been studied. The wave equation describing the interaction of intense laser pulse with collisional magnetoactive plasma is derived. In addition, employing source-dependent expansion (SDE) method, the analysis of the laser spot-size is discussed. It is shown that with increasing of the angle in obliquely external magnetic field, the spot-size of laser pulse decreases and as a result laser pulse becomes more focused. Furthermore, it is concluded that the self-focusing quality of the laser pulse has been enhanced due to the presence of obliquely external magnetic field in the collisional magnetoactive plasma. Besides, it is seen that with increasing of [Formula: see text], the laser spot-size reduces and subsequently the self-focusing of the laser pulse in plasma enhances. Moreover, it is found that changing the collision effect in the magnetoactive plasma leads to increases of self-focusing properties.

Effect of dust grains on propagation of electromagnetic wave in a cold quantum dusty plasma

2015 ◽  
Vol 81 (2) ◽  
Author(s):  
Punit Kumar ◽  
Abhisek Kumar Singh
Keyword(s):  
Magnetic Field ◽  
Electromagnetic Wave ◽  
Incident Radiation ◽  
Intense Laser ◽  
Quantum Plasma ◽  
Intense Laser Pulse ◽  
One Dimensional ◽  
Linearly Polarized ◽  
Linearly Polarized Radiation ◽  
Polarized Radiation

A one-dimensional nonlinear theoretical analysis for the interaction of intense laser pulse with high density electron-ion-dust quantum plasma. The linearly polarized radiation propagates in the presence of a constant magnetic field applied perpendicular to both the electric vector and the direction of propagation. Dispersion of the incident radiation and generation of its harmonics are studied.

Biaxially Textured Buffer Layers on Large-Area Polycrystalline Substrates

1999 ◽  
Vol 585 ◽  
Author(s):  
J. Dzick ◽  
S. Sievers ◽  
J. Hoffmann ◽  
K. Thiele ◽  
F. Garcia-Moreno ◽  
...  
Keyword(s):  
Room Temperature ◽  
Ion Beam ◽  
Thermal Contact ◽  
Deposition Process ◽  
Ion Sources ◽  
Buffer Layers ◽  
Large Area ◽  
Ybco Films ◽  
Ion Beam Assisted Deposition ◽  
Temperature Deposition

AbstractBiaxially textured yttria stabilized zirconia (YSZ) buffer layers were deposited on long polycrystalline metallic tapes by an ion-beam-assisted deposition process (IBAD) to serve as templates for high-current carrying Y1Ba2Cu3O7-x (YBCO) films. YSZ was deposited by a dualionbeam equipment with two 11 cm Kaufman ion sources. The coating of large-area technical substrates, large in comparison with the ion sources, requires substrate movements to render YSZ films of homogeneous texture quality. These movements can hinder cooling of the metallic tapes in the absence of a thermal contact. Therefore, the temperature of those small-heat-capacity substrates could rise to above 100 °C within minutes, causing a decrease of the in-plane alignment of YSZ. The investigation of the temperature dependence of the IBAD process reveals that the best results of the in-plane alignment could be obtained by room temperature deposition. Applying high tape velocities hinder a rise of the deposition temperature to above 90 °C. Therefore, it is possible to deposit YSZ films on metal tapes (up to 60 mm × 1000 mm) with in-plane textures down to 15° full width at half maximum (FWHM), which allow their coating with highcurrent-carrying YBCO films.

scholarly journals Controllability of intense-laser ion acceleration

2014 ◽  
Vol 2 ◽  
Author(s):  
Shigeo Kawata ◽  
Toshihiro Nagashima ◽  
Masahiro Takano ◽  
Takeshi Izumiyama ◽  
Daiki Kamiyama ◽  
...  
Keyword(s):  
Energy Efficiency ◽  
Energy Spectrum ◽  
Ion Beam ◽  
Critical Density ◽  
Particle Energy ◽  
Intense Laser ◽  
Solid Target ◽  
Ion Energy ◽  
Ion Accelerator ◽  
Beam Collimation

AbstractAn ion beam has the unique feature of being able to deposit its main energy inside a human body to kill cancer cells or inside material. However, conventional ion accelerators tend to be huge in size and cost. In this paper, a future intense-laser ion accelerator is discussed to make the laser-based ion accelerator compact and controllable. The issues in the laser ion accelerator include the energy efficiency from the laser to the ions, the ion beam collimation, the ion energy spectrum control, the ion beam bunching, and the ion particle energy control. In the study, each component is designed to control the ion beam quality by particle simulations. The energy efficiency from the laser to ions is improved by using a solid target with a fine sub-wavelength structure or a near-critical-density gas plasma. The ion beam collimation is performed by holes behind the solid target or a multi-layered solid target. The control of the ion energy spectrum and the ion particle energy, and the ion beam bunching are successfully realized by a multi-stage laser–target interaction.

scholarly journals Multi probes measurements at the PALS Facility Research Centre during high intense laser pulse interactions with various target materials

2018 ◽  
Vol 167 ◽  
pp. 03009 ◽  
Author(s):  
Massimo De Marco ◽  
Josef Krása ◽  
Jakub Cikhardt ◽  
Fabrizio Consoli ◽  
Riccardo De Angelis ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Laser Pulse ◽  
Microstrip Antenna ◽  
Wide Band ◽  
Intense Laser ◽  
Research Centre ◽  
Target Chamber ◽  
Intense Laser Pulse ◽  
Target Holder ◽  
Target Probe

During the interaction of high intense laser pulse with solid target, a large amount of hot electrons is produced and a giant Electromagnetic Pulse (EMP) is generated due to the current flowing into the system target–target holder, as well as due to the escaping charged particles in vacuum. EMP production for different target materials is investigated inside and outside the target chamber, using monopole antenna, super wide-band microstrip antenna and Moebius antenna. The EMP consists in a fast transient magnetic field lasting hundreds of nanosecond with frequencies ranging from MHz to tens of GHz. Measurements of magnetic field and return target current in the range of kA were carried out by an inductive target probe (Cikhardt J. et al. Rev. Sci. Instrum. 85 (2014) 103507).

scholarly journals Generation mechanism of 100 MG magnetic fields in the interaction of ultra-intense laser pulse with nanostructured target

2020 ◽  
Vol 8 ◽  
Author(s):  
J. M. Tian ◽  
H. B. Cai ◽  
W. S. Zhang ◽  
E. H. Zhang ◽  
B. Du ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Magnetic Fields ◽  
Laser Pulse ◽  
Analytical Model ◽  
Plasma Phys ◽  
Intense Laser ◽  
Relativistic Electrons ◽  
Intense Laser Pulse ◽  
Hydrodynamic Description ◽  
Nanostructured Arrays

Experimental and simulation data [Moreau et al., Plasma Phys. Control. Fusion 62, 014013 (2019); Kaymak et al., Phys. Rev. Lett. 117, 035004 (2016)] indicate that self-generated magnetic fields play an important role in enhancing the flux and energy of relativistic electrons accelerated by ultra-intense laser pulse irradiation with nanostructured arrays. A fully relativistic analytical model for the generation of the magnetic field based on electron magneto-hydrodynamic description is presented here. The analytical model shows that this self-generated magnetic field originates in the nonparallel density gradient and fast electron current at the interfaces of a nanolayered target. A general formula for the self-generated magnetic field is found, which closely agrees with the simulation scaling over the relevant intensity range. The result is beneficial to the experimental designs for the interaction of the laser pulse with the nanostructured arrays to improve laser-to-electron energy coupling and the quality of forward hot electrons.

Sign in / Sign up

Export Citation Format

Share Document