Conveners
WG2_Parallel
- Louise Willingale (University of Michigan)
- Alessandro Flacco (LOA/ENSTA)
WG2_Parallel
- Louise Willingale (University of Michigan)
- Alessandro Flacco (LOA/ENSTA)
WG2_Parallel
- Louise Willingale (University of Michigan)
- Alessandro Flacco (LOA/ENSTA)
WG2_Parallel
- Alessandro Flacco (LOA/ENSTA)
- Louise Willingale (University of Michigan)
Melanie ROEDEL
25/09/2017, 16:00
WG2 - Ion Beams from Plasmas
talk
The combination of ultra-intense lasers with x-ray free-electron lasers (XFELs) opens up a variety of applications in plasma and shock physics.
Many phenomena during the laser-target interaction happen on short time scales in the range from femto- to picoseconds and length scales of tens of nanometers to a few micrometers. Unlike the ultra-short, highly coherent x-ray pulse, optical methods...
Prof.
Sargis Ter-Avetisyan
(ELI-ALPS)
25/09/2017, 16:25
WG2 - Ion Beams from Plasmas
talk
The unique exploratory mission of laser driven ion acceleration research is to build the scientific foundation needed to develop high energy laser-particle accelerators.
This presentation will discuss the ion acceleration obtained on 1.5 PW laser. The newly found scenario of ion acceleration offers more favorable proton energy scaling with laser intensity than it is known for โordinaryโ...
Dr
Nicholas Dover
(National Institutes for Quantum and Radiological Science and Technology, Japan)
25/09/2017, 16:50
WG2 - Ion Beams from Plasmas
talk
The behaviour of high power laser driven ion generation at the extreme intensities available at next-generation laser facilities is an important topic for realising potential applications. One of the simplest schemes for proton sources for applications is sheath acceleration, for which different models predict varying dependence on laser and target parameters, motivating experimental...
Dr
Charlotte Palmer
(Lancaster University/Cockcroft Institute)
25/09/2017, 17:10
WG2 - Ion Beams from Plasmas
talk
In the interaction of high intensity lasers with solid targets, electron heating and transport play a crucial role in the transfer of energy from the laser to an energetic ion beam. When hot electrons traverse the target bulk, measurements have shown that they are subject to filamentation and can be strongly influenced by fields formed at the target rear surface resulting in a non-laminar...
Mrs
Lieselotte Obst
(Helmholtz-Zentrum Dresden-Rossendorf)
25/09/2017, 18:00
WG2 - Ion Beams from Plasmas
talk
We report on recent experimental results deploying a continuous cryogenic hydrogen jet as a debris-free, renewable laser-driven source of pure proton beams generated at the 150 TW ultrashort pulse laser Draco. Efficient proton acceleration reaching cut-off energies of up to 20 MeV with particle numbers exceeding 10^9 particles per MeV per steradian is demonstrated, showing for the first time...
Dr
Sven Steinke
(Lawrence Berkeley National Laboratory)
25/09/2017, 18:20
WG2 - Ion Beams from Plasmas
talk
We present first results on ion acceleration with the BELLA PW laser as well as end-to-end simulation for isochoric heating of solid gold targets using PW-laser generated ion beams: (i) 2D Particle-In-Cell (PIC) simulations are applied to study the ion source characteristics of the PW laser-target interaction at the long focal length (f/65) beamline at laser intensities of ~ใ5ร10ใ^19 Wcm-2 at...
Dr
Valentina Scuderi
(ELI-Beamlines, IoP-ASCR, INFN-LNS)
25/09/2017, 18:40
WG2 - Ion Beams from Plasmas
talk
Nowadays, high power laser-driven acceleration is one of the most interesting challenges in particle acceleration field, showing attractive characteristics for multidisciplinary and medical applications. Nevertheless, optically accelerated ion peculiarities make mandatory development of transport, selection, diagnostics and dosimetry system to deliver reproducible and controlled beams for...
Dr
Alessandro Flacco
(LOA/ENSTA)
25/09/2017, 19:00
WG2 - Ion Beams from Plasmas
talk
Laser accelerated proton beams have an extremely high peak current and a total charge per shot in the order of nC. However, their wide divergence and continuous spectra make their application to target irradiation difficult. On the SAPHIR laser (LOA) we used a set of permanent magnet quadrupoles to focus the proton beam to a wide irradiation area for in vitro irradiation studies. Absolutely...
Dr
Hans-Peter Schlenvoigt
(Helmholtz-Zentrum Dresden - Rossendorf)
25/09/2017, 19:15
WG2 - Ion Beams from Plasmas
talk
With the recent upgrade, the DRACO Ti:Sa laser at Helmholtz-Zentrum Dresden โ Rossendorf (HZDR), became a multi-beam, multi-target-area laser facility, delivering pulses of 30 fs pulse duration with energies of up to currently 30 J. The implementation of a "plug-in" plasma mirror allows to study the scaling of ion acceleration performance with laser pulse energy, temporal pulse contrast and...
Prof.
wenjun ma
(Peking university)
27/09/2017, 16:00
WG2 - Ion Beams from Plasmas
talk
It is demonstrated in experiments and simulations that radiation pressure acceleration (RPA) and sheath acceleration of ions can be automatically cascaded in sequence when a single n ultraintense femtosecond laser pulse is focused on a double-layer target composed of well controlled, slightly underdense plasma and ultrathin foil. We reveal that such cascaded acceleration is especially suited...
Mr
Aodhan McIlvenny
(Queen's University of Belfast)
27/09/2017, 16:20
WG2 - Ion Beams from Plasmas
talk
The talk will present results of recent experiments using the GEMINI laser at the Rutherford Appleton Laboratory investigating the acceleration of ions from ultrathin carbon foilsย (2-100nm).ย The laser delivered ~8J (after two plasma mirrors) on target in a 30fs (ฮป= 800nm) pulse providing an intensity of approximately 6x10^20Wcm^-2.
In this interaction regime, it is known that laser...
Ms
Emma-Jane DITTER
(Imperial College London)
27/09/2017, 16:40
WG2 - Ion Beams from Plasmas
talk
Ion acceleration in thin targets can occur through several different mechanisms such as relativistic transparency and radiation pressure acceleration. The acceleration regimes are distinguishable through the structure of the ion beams produced as well as the level of laser energy absorption.
We present data from a recent experiment conducted using ultra-thin targets on the Astra-Gemini...
Dr
Alexander Soloviev
(Institute of Applied Physics of RAS)
27/09/2017, 17:00
WG2 - Ion Beams from Plasmas
talk
The work presents the experimental investigation of interaction between femtosecond sub-PW laser pulse with plasmas conducted at PEARL laser facility. The conditions of effective laser energy deposition into the solid target leading to TNSA proton beams with up to 43 MeV energy cut-off are experimentally realized. The characterization of the target conditions is achieved by combining X-ray...
Dr
Andrey Brantov
(P.N. Lebedev Physical Institute of the Russian Academy of Sciences)
27/09/2017, 17:15
WG2 - Ion Beams from Plasmas
talk
In this talk we discuss further development of the recently proposed concept of proton synchronized acceleration by slow light (SASL) from low-density targets by powerful laser pulses [Brantov et.al, Phys.Rev.Lett. 116, 085004 (2016)]. The key point of SASL is the capability for the laser pulse first to slow and then to increase its group velocity monotonically inside a target. Ions are...
Diana Jahn
(Technische Universitรคt Darmstadt)
27/09/2017, 18:00
WG2 - Ion Beams from Plasmas
talk
Laser-driven ion acceleration became a promising field in the past 20 years. The Laser Ion Generation, Handling and Transport (LIGHT) collaboration makes in this field a significant impact. This collaboration was founded to combine laser-driven ion acceleration with conventional accelerator technology. It consists of several university groups (Technische Universitรคt Darmstadt, Technische...
Dr
Evangelos Siminos
(Chalmers University of Technology)
27/09/2017, 18:20
WG2 - Ion Beams from Plasmas
talk
We study kinetic effects responsible for the transition to relativistic self-induced transparency in the interaction of a circularly-polarized laser-pulse with an overdense plasma and their relation to hole-boring and ion acceleration. It is demonstrated using particle-in-cell simulations and an analysis of separatrices in single-electron phase-space, that ion motion can suppress fast electron...
Seyed Reza Mirfayzi
(Queen's University Belfast)
27/09/2017, 18:40
WG2 - Ion Beams from Plasmas
talk
The neutron sources produced by employing intense laser-driven ion beams have recently received a great deal of attention. Intense lasers can produce 10s of MeV protons in a small divergence cone by, for instance, Target Normal Sheath Acceleration (TNSA) mechanism, which is highly efficient in producing fast neutrons via fusion reaction with low mass atomic nuclei. Employing a neutron...
Prof.
danilo giulietti
(Pisa University)
27/09/2017, 19:00
WG2 - Ion Beams from Plasmas
talk
After the development of very high intensity, ultra-short pulse laser systems, laser-plasma acceleration has become a concrete reality. This new acceleration technique is an interesting alternative to the gigantism of conventional accelerators and is, however, paving the way for innovative applications in a number of fields, especially the medical one. What was difficult to predict is that...
222.
Parametric study of proton beams driven by 200TW laser system using a tape driven target system
Mr
Muhammad Noaman ul Haq
(Key Laboratory for Laser Plasmas (Ministry of Education), School of Physics and Astronomy, Shanghai Jiao Tong University, Shanghai 200240, China)
27/09/2017, 19:15
WG2 - Ion Beams from Plasmas
talk
Ultra-short intense laser-plasma interaction comprises diverse physical processes resulting in particle acceleration and generation of radiations that are promising for future accelerator, material and medical fields. In order to generate high quality proton beam and use them as a diagnostic tool, it is important to investigate correlations between laser and the proton beam parameters. In this...
