Coordinatori
WG2 - Ion beams from plasmas
- Ulrich Schramm (Helmholtz-Zentrum Dresden-Rossendorf)
- Marco Borghesi (Queen's University Belfast)
WG2 - Ion beams from plasmas
- Marco Borghesi (Queen's University Belfast)
- Ulrich Schramm (Helmholtz-Zentrum Dresden-Rossendorf)
WG2 - Ion beams from plasmas
- Ulrich Schramm (Helmholtz-Zentrum Dresden-Rossendorf)
- Marco Borghesi (Queen's University Belfast)
WG2 - Ion beams from plasmas
- Ulrich Schramm (Helmholtz-Zentrum Dresden-Rossendorf)
- Marco Borghesi (Queen's University Belfast)
WG2 - Ion beams from plasmas
- Marco Borghesi (Queen's University Belfast)
- Ulrich Schramm (Helmholtz-Zentrum Dresden-Rossendorf)
WG2 - Ion beams from plasmas
- Ulrich Schramm (Helmholtz-Zentrum Dresden-Rossendorf)
- Marco Borghesi (Queen's University Belfast)
Dr.
Yuji Fukuda
(Japan Atomic Energy Agency)
14/09/15, 16:00
WG2 - Ion beams from plasmas
talk
In order to understand the synergetic interplay between the Coulomb explosion of clusters and the background gas dynamics, an energy spectrum of carbon/oxygen ions from the CO_2 clusters and that of protons from the background hydrogen gas are measured separately at 1×10^19 W/cm^2 with a careful analysis of etch pit structures on CR-39. The maximum energies of carbon/oxygen ions and protons...
Sig.
Tobias Ostermayr
(LMU München and MPI-Q)
14/09/15, 16:25
WG2 - Ion beams from plasmas
talk
We present experiments with fully isolated, levitating targets irradiated by PW class laser pulses. For the first time, our novel setup allows exploitation of the well defined target mass spanning 6 orders of magnitude, in particular for the optimisation of laser driven ion sources.
Martin Rehwald
(Helmholtz-Zentrum Dresden-Rossendorf)
14/09/15, 16:45
WG2 - Ion beams from plasmas
talk
Applications of laser-accelerated protons demand a stable, high-energy and high-repetition rate particle source. We present the results of our experimental campaign in cooperation with the HED group at SLAC, performed at the 10 Hz Ti:Sa laser Draco of Helmholtz-Zentrum Dresden-Rossendorf (HZDR), employing a cryogenic Hydrogen jet as a renewable target. Draco delivers pulses of 30 fs and 5 J at...
Dr.
Laura Di Lucchio
(Forschungszentrum Juelich)
14/09/15, 17:05
WG2 - Ion beams from plasmas
talk
The energy distribution of electron and ion beams emerging from the interaction of a few-cycle Gaussian laser pulse with spherical nanoclusters is investigated by means of 2D PIC simulations with the code EPOCH. It is found that the direct conversion of laser energy into dense attosecond electron nanobunches (Di Lucchio & Gibbon, PRSTAB 18, 02/2015) results in rapid charge separation and...
Dr.
Brendan Dromey
(Queens University Belfast)
14/09/15, 18:00
WG2 - Ion beams from plasmas
talk
Over the last decade research into laser driven ion acceleration has led to the development of a new generation of ultra-compact accelerators. While this high flux source has been exploited for applications [1], the direct observation of ultrafast processes initiated by laser-driven ion bunches has yet to be realised. Here we report on the absolute metrology of proton bursts as short as 3.5 ±...
Prof.
Arie Zigler
(Hebrew University)
14/09/15, 18:25
WG2 - Ion beams from plasmas
talk
Traditional approach to laser based acceleration of protons relies on target normal sheath acceleration (TNSA) or radiation pressure acceleration (RPA) schemes. However, achieving the 150MeV proton energy levels applicable for cancer treatment requires multi-PW laser systems. We have demonstrated possibility to obtain 25MeV proton bunches accelerated by the interaction of a 5TW ultra short...
Prof.
Sargis Ter-Avetisyan
(Dept of Physics and Photon Science, Gwangju Institute of Science Technology (GIST), and Center for Relativistic Laser Science (CoReLS), Institute for Basic Science (IBS))
14/09/15, 18:45
WG2 - Ion beams from plasmas
talk
Negative ions play a major role in a number of areas of physics and chemistry, for high current tandem accelerators, for ion beam microscopy and lithography. Nowadays the neutral atoms are considered essential in the fusion experiments for additional heating of the plasma.
There is also a strong fundamental interest in negative ions: in this loosely bound system in screening of nucleus the...
Rajendra PRASAD
14/09/15, 19:05
WG2 - Ion beams from plasmas
talk
Here, we report novel experimental results on topic ion acceleration in ultra-high intensity regime using multiple beams. The experiments have been performed at Arcturus laser facility (Heinrich Heine University, Düsseldorf) using both arms of ultra-short 200TW beams and a 10 TW probe pulse. The main interaction beams (energy up to 6J and pulse duration 30 fs) were focused at intensities >1020...
Sig.na
Clare Scullion
(Queen's University Belfast)
15/09/15, 15:00
WG2 - Ion beams from plasmas
talk
Laser driven ion acceleration is an area receiving increasing interest in fundamental research due to the continuous progression in high power laser technology and to its possible applications, including proton radiography, production of warm dense matter, fast ignition of fusion targets, biomedical applications and nuclear and particle physics.
Two experiments were carried out on the...
Dr.
Nicholas Dover
(Imperial College London)
15/09/15, 15:20
WG2 - Ion beams from plasmas
talk
In high intensity laser solid interactions, it has been supposed that going to ultra thin foils will allow access to novel regimes of acceleration such as radiation pressure, hole boring and relativistic transparency. We present data from an experiment on the Vulcan Petawatt laser at the Central Laser Facility, UK. We irradiated ultra-thin CH foils with a 220J, 1ps laser pulse focussed to a...
Sig.
Georg Alexander Becker
(University of Jena, Germany)
15/09/15, 15:40
WG2 - Ion beams from plasmas
talk
To investigate laser-driven ion acceleration in the regime of Light-Sail Radiation Pressure Acceleration it is essential to use foils of few nm thickness. Therefore an extremely high temporal intensity contrast is required to avoid destruction of the target by the prepulse. An ion acceleration experiment was performed at the fully diode pumped laser system POLARIS at the Helmholtz-Institute...
Stefano Sinigardi
(BO)
15/09/15, 16:05
WG2 - Ion beams from plasmas
talk
The continuous development of laser systems, now easily reaching the petawatt level, is posing an interesting challenge related to understanding the effect of the prepulse. This effect is important even when using lower power systems, if the main pulse intensity on target is enough to work in Target Normal Sheath Acceleration conditions. Every time we irradiate with such a laser system a solid...
Dr.
Leonida Antonio Gizzi
(ILIL, INO-CNR, Pisa, Italy and INFN, Pisa, Italy)
15/09/15, 16:25
WG2 - Ion beams from plasmas
talk
Laser driven light-ion acceleration is being investigated for the optimization of ion cut-off energy and ion current using the ILIL laser at an intensity of 2E19 W/cm2. Here we focus our attention to the identification of the role of surface and target thickness and resistivity in the fast electron transport and in the acceleration process. We will show experimental results which clearly show...
Dr.
annamaria muoio
(Università di Messina - INFN LNS Catania)
15/09/15, 16:45
WG2 - Ion beams from plasmas
talk
An experimental campaign aiming to investigate the acceleration mechanisms through Laser-matter interaction in nanosecond domain has been carried out at the LENS (Laser Energy for Nuclear Science) laboratory of INFN-LNS, Catania. Different techniques permit to monitor the plasma and to determine its reproducibility. Different targets of pure Al are placed in a vacuum chamber an innovative...
Dr.
Carmen Altana
(INFN-LNS, Univ. di Catania - Dip. di Fisica e Astronomia)
15/09/15, 17:05
WG2 - Ion beams from plasmas
talk
An experimental campaign aiming to investigate the ion acceleration mechanism trough laser-matter interaction in femtosecond domain has been carried out at the ILIL facility with a laser intensity of 2E19 W/cm2.
A combination of detectors were used to measure the proprieties of accelerated light ions, including a Thomson Parabola (TP), CR-39 detectors and Radiochromic films (RCF) to identify...
Matt ZEPF
(Helmholtz Institut Jena and Queen's University Belfast)
15/09/15, 18:00
WG2 - Ion beams from plasmas
talk
Carbon Naotube Foam (CNF) allows the controlled formation of near critical density plasmas over tightly defined spatial intervals and steep gradients. These unique characteristics make
it a powerful new tool for the control of laser plasma interactions. When a laser propagates through CNF, the laser pulse front is steepened substantially and even lasers with high numerical aperture undergo...
Dr.
wenjun ma
(Faculty of Physics, Ludwig-Maximilians University (LMU))
16/09/15, 16:00
WG2 - Ion beams from plasmas
talk
Here we report recent experimental results on ion acceleration with high-contrast femtosecond Petawatt laser and novel composite targets. Linearly-polarized, 30-fs, 9.2 J, high-contrast laser pulses were focused onto double-layer targets composed of nanofoams and nanofoils. It was found that ion energy strongly depends on the thickness of nanofoam layer. At optical thickness, 58 MeV protons...
Prof.
Malte Kaluza
(University of Jena, Helmholtz-Institute Jena)
16/09/15, 16:25
WG2 - Ion beams from plasmas
talk
Results on experiments on laser driven ion acceleration will be presented, which have been carried out at the IOQ in Jena, either with the 40-TW Ti:Sapphire system JETI or with the fully diode pumped, 100-TW POLARIS system. First, experiments on truly mass-limited targets will be presented, which have used water droplets of few-µm diameter showing a clear modulation of the protons’ energy...
Sig.
Aaron Alejo
(Queen's University of Belfast)
16/09/15, 16:50
WG2 - Ion beams from plasmas
talk
The rapid progress in laser technologies has led to an increasing interest in ion acceleration due to the reduced costs and compactness in comparison with conventional accelerators. Among other mechanisms, Radiation Pressure Acceleration, particularly LightSail regime, has drawn significant attention due to its ion energy and efficiency scaling. RPA relies on the target remaining reflective for...
Dr.
Nicholas Dover
(Imperial College London)
16/09/15, 17:10
WG2 - Ion beams from plasmas
talk
We report on recent experiments using the high power CO2 laser (λ ∼ 10 μm , a0 ∼ 1) at the Accelerator Test Facility, Brookhaven National Laboratory to generate ~MeV protons and helium ions, which are accelerated by collisionless shockwave acceleration in overcritical gas targets. We have developed new techniques of shaping gas jet targets with optically induced hydrodynamic shocks, allowing...
Dr.
Satyabrata Kar
(Queen's University Belfast)
16/09/15, 18:00
WG2 - Ion beams from plasmas
talk
The key to the growing interest in laser based ion accelerators lies in their cost effectiveness and compactness, which,coupled to ongoing technological developments, makes the prospects for all-optical accelerators very promising and appealing. Among various shortcomings to overcome, the challenge is to produce a high energy pencil beam of narrow band spectrum.
High power lasers are capable...
Patrizio Antici
(LNF)
16/09/15, 18:25
WG2 - Ion beams from plasmas
talk
The enhancement and control of growing techniques for nanomaterials, in particular nanocrystals, is one of the current key challenges in nanoscience and nanotechnology. The possibility to obtain routinely nanocrystals with controlled shape, dimensions and crystallinity is a challenge that many research groups are pursuing and strategically important for manifold applications.
The irradiation...
Prof.
Ceferino Obcemea
(Memorial Sloan Kettering Cancer Center)
16/09/15, 18:40
WG2 - Ion beams from plasmas
talk
Plasma-accelerated ion beams have lately advanced from mere proofs-of-principle experiments to what can now be called a maturing phase of new technologies: with higher intensity lasers, new target materials and particle injection schemes becoming available. We present some unique advantages of these beams in hadron cancer therapy:
These beams could be delivered at short pulses, with very...
Francesco Romano
(LNS)
16/09/15, 18:55
WG2 - Ion beams from plasmas
talk
Nowadays the innovative particle acceleration technique based on laser-target interaction, represents a promising alternative to the conventional one. Nevertheless the peculiarities of the laser-accelerated ion beams, as the broad energy and angular distribution and the low reproducibility make necessary the development of dedicated non-conventional transport devices in order to obtain...
Giuliana Giuseppina Milluzzo
(LNS)
16/09/15, 19:10
WG2 - Ion beams from plasmas
talk
The extreme and peculiar features of laser accelerated ion beams, (like the wide energy and angular distribution and the instability), make them actually not directly suitable for multidisciplinary applications. In this contest the ELIMED (ELI-beamlines MEDical and multidisciplinary applications), will be designed and realized by INFN-LNS and then installed in Prague within the 2017, in order...
