Influence of the Laser Prepulse on Proton Acceleration in Thin-Foil Experiments

2004 ◽  
Vol 93 (4) ◽  
Author(s):  
M. Kaluza ◽  
J. Schreiber ◽  
M. I. K. Santala ◽  
G. D. Tsakiris ◽  
K. Eidmann ◽  
...  
Keyword(s):  
Thin Foil ◽  
Proton Acceleration

scholarly journals Observation of Preformed Plasma Generated from a Thin-Foil Target for Laser-Driven Proton Acceleration

2014 ◽  
Vol 42 (2) ◽  
pp. 160
Author(s):  
Akito SAGISAKA ◽  
Alexander S. PIROZHKOV ◽  
Mamiko NISHIUCHI ◽  
Koichi OGURA ◽  
Hironao SAKAKI ◽  
...  
Keyword(s):  
Thin Foil ◽  
Proton Acceleration ◽  
Foil Target ◽  
Preformed Plasma

Effect of target composition on proton acceleration in ultraintense laser-thin foil interaction

2012 ◽  
Vol 19 (9) ◽  
pp. 093108 ◽  
Author(s):  
Qingcao Liu ◽  
Meng Liu ◽  
Tongpu Yu ◽  
Pengji Ding ◽  
Zuoye Liu ◽  
...  
Keyword(s):  
Thin Foil ◽  
Proton Acceleration ◽  
Target Composition

scholarly journals Proton beam quality enhancement by spectral phase control of a PW-class laser system

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
T. Ziegler ◽  
D. Albach ◽  
C. Bernert ◽  
S. Bock ◽  
F.-E. Brack ◽  
...  
Keyword(s):  
Proton Beam ◽  
Laser Energy ◽  
Beam Quality ◽  
Laser System ◽  
Thin Foil ◽  
High Repetition Rate ◽  
Spectral Phase ◽  
Experimental Investigations ◽  
Enhancement Effect ◽  
Proton Acceleration

AbstractWe report on experimental investigations of proton acceleration from solid foils irradiated with PW-class laser-pulses, where highest proton cut-off energies were achieved for temporal pulse parameters that varied significantly from those of an ideally Fourier transform limited (FTL) pulse. Controlled spectral phase modulation of the driver laser by means of an acousto-optic programmable dispersive filter enabled us to manipulate the temporal shape of the last picoseconds around the main pulse and to study the effect on proton acceleration from thin foil targets. The results show that applying positive third order dispersion values to short pulses is favourable for proton acceleration and can lead to maximum energies of 70 MeV in target normal direction at 18 J laser energy for thin plastic foils, significantly enhancing the maximum energy compared to ideally compressed FTL pulses. The paper further proves the robustness and applicability of this enhancement effect for the use of different target materials and thicknesses as well as laser energy and temporal intensity contrast settings. We demonstrate that application relevant proton beam quality was reliably achieved over many months of operation with appropriate control of spectral phase and temporal contrast conditions using a state-of-the-art high-repetition rate PW laser system.

scholarly journals High-intensity laser-driven proton acceleration: influence of pulse contrast

2006 ◽  
Vol 364 (1840) ◽  
pp. 711-723 ◽  
Author(s):  
Paul McKenna ◽  
Filip Lindau ◽  
Olle Lundh ◽  
David Neely ◽  
Anders Persson ◽  
...  
Keyword(s):  
Laser Pulse ◽  
Thin Foil ◽  
Laser Pulses ◽  
Energy Distributions ◽  
Proton Acceleration ◽  
High Intensity Laser ◽  
Short Laser Pulses ◽  
Spatial Quality ◽  
Intensity Laser ◽  
Pulse Contrast

Proton acceleration from the interaction of ultra-short laser pulses with thin foil targets at intensities greater than 10 18  W cm −2 is discussed. An overview of the physical processes giving rise to the generation of protons with multi-MeV energies, in well defined beams with excellent spatial quality, is presented. Specifically, the discussion centres on the influence of laser pulse contrast on the spatial and energy distributions of accelerated proton beams. Results from an ongoing experimental investigation of proton acceleration using the 10 Hz multi-terawatt Ti : sapphire laser (35 fs, 35 TW) at the Lund Laser Centre are discussed. It is demonstrated that a window of amplified spontaneous emission (ASE) conditions exist, for which the direction of proton emission is sensitive to the ASE-pedestal preceding the peak of the laser pulse, and that by significantly improving the temporal contrast, using plasma mirrors, efficient proton acceleration is observed from target foils with thickness less than 50 nm.

scholarly journals Experimental study of proton acceleration from thin-foil on a table top Ti:Sapphire

2018 ◽  
Vol 1079 ◽  
pp. 012001
Author(s):  
I Sánchez ◽  
R Lera ◽  
J Ruda ◽  
JB Gonzalez ◽  
F Ruiz ◽  
...  
Keyword(s):  
Experimental Study ◽  
Thin Foil ◽  
Proton Acceleration

Proton Acceleration from High-Intensity Laser Interactions with Thin Foil Targets

2003 ◽  
Vol 90 (6) ◽  
Author(s):  
M. Zepf ◽  
E. L. Clark ◽  
F. N. Beg ◽  
R. J. Clarke ◽  
A. E. Dangor ◽  
...  
Keyword(s):  
High Intensity ◽  
Thin Foil ◽  
Proton Acceleration ◽  
High Intensity Laser ◽  
Intensity Laser ◽  
Laser Interactions

scholarly journals Parametric Study of Proton Acceleration from Laser-Thin Foil Interaction

Plasma ◽  
2021 ◽  
Vol 4 (4) ◽  
pp. 670-680
Author(s):  
Mohammed Almassarani ◽  
Sixu Meng ◽  
Burgard Beleites ◽  
Falk Ronneberger ◽  
Gerhard G. Paulus ◽  
...  
Keyword(s):  
Laser Energy ◽  
Thin Foil ◽  
Spot Size ◽  
Maximum Energy ◽  
Single Shot ◽  
Proton Acceleration ◽  
Detection Range ◽  
Charge Coupled Device ◽  
Experimental Findings ◽  
Beam Characteristics

We experimentally investigated the accelerated proton beam characteristics such as maximum energy and number by varying the incident laser parameters. For this purpose, we varied the laser energy, focal spot size, polarization, and pulse duration. The proton spectra were recorded using a single-shot Thomson parabola spectrometer equipped with a microchannel plate and a high-resolution charge-coupled device with a wide detection range from a few tens of keV to several MeV. The outcome of the experimental findings is discussed in detail and compared to other theoretical works.

Radiation-Induced Precipitation at Thin Foil Surfaces in Ni-Be Alloys

1982 ◽  
Vol 40 ◽  
pp. 598-599
Author(s):  
T. Mukai ◽  
T. E. Mitchell
Keyword(s):  
Electron Microscopy ◽  
High Voltage ◽  
Electron Irradiation ◽  
High Vacuum ◽  
Thin Foil ◽  
Homogeneous Precipitation ◽  
High Voltage Electron Microscopy ◽  
Voltage Electron ◽  
High Voltage Electron ◽  
Radiation Induced

Radiation-induced homogeneous precipitation in Ni-Be alloys was recently observed by high voltage electron microscopy. A coupling of interstitial flux with solute Be atoms is responsible for the precipitation. The present investigation further shows that precipitation is also induced at thin foil surfaces by electron irradiation under a high vacuum.

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