European Conference on Laser Interaction with Matter最新文献_第7页

Taking into account the time behavior of laser power errors in the Laser MegaJoule robustness study 考虑激光功率误差的时间行为，进行激光兆焦耳鲁棒性研究

European Conference on Laser Interaction with Matter Pub Date : 2003-12-12 DOI: 10.1117/12.537396

J. Giorla, F. Poggi

{"title":"Taking into account the time behavior of laser power errors in the Laser MegaJoule robustness study","authors":"J. Giorla, F. Poggi","doi":"10.1117/12.537396","DOIUrl":"https://doi.org/10.1117/12.537396","url":null,"abstract":"In the Laser MegaJoule indirect drive experiments, the time-averaged radiation asymmetry on a Deuterium-Tritium (DT) capsule must be minimized to achieve high-yield implosions. A two-dimensional model estimates the time-averaged effect of power imbalance, laser beam pointing and target fabrication errors on the final DT deformation, which is then submitted to an ignition threshold. As these errors will take random values from one LMJ shot to another, the robustness study aims at quantifying the probability of failing to reach ignition. Here, we focus on laser power imbalance. We distinguish two types of error sources in laser performance, according to whether they take long-time (more than the laser pulse duration) or short-time (less than the laser pulse duration) correlated values. Indeed, as the final DT deformation results from the whole laser pulse history, the failure probability depends on the error time-correlation. A 1D-time model of the laser beam power, from the front-end to the target, was developed to quantify the variations of the output power imbalance due to the source contributions. Taking into account this detailed time behavior, instead of modeling all errors as long-time correlated values, leads to cut the global effect of power imbalance on ignition probability by half.","PeriodicalId":340981,"journal":{"name":"European Conference on Laser Interaction with Matter","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-12-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115495309","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Amplification of acoustic oscillations by short laser pulses due to fast heating of electrons 由于电子的快速加热，用短激光脉冲放大声振荡

European Conference on Laser Interaction with Matter Pub Date : 2003-12-12 DOI: 10.1117/12.537383

Y. V. Afanasiev, B. Chichkov, V. Isakov, A. P. Kanavin, S. A. Uryupin

引用次数: 0

Laser-produced post-pulse crater formation in solids observed in PALS facility interaction experiment 在PALS装置相互作用实验中观察到的固体激光脉冲后坑形成

European Conference on Laser Interaction with Matter Pub Date : 2003-12-12 DOI: 10.1117/12.536517

I. Y. Doskach, S. Gus'kov, K. Jungwirth, M. Kalal, A. Kasperczuk, B. Králiková, E. Krouský, J. Limpouch, K. Mašek, M. Pfeifer, T. Pisarczyk, K. Rohlena, V. Rozanov, J. Skála, J. Ullschmied

引用次数: 5

Skin depth theory for nonlinear-force driven block ignition laser-ICF based on anomalous picosecond terawatt laser-plasma interaction 基于异常皮秒太瓦激光等离子体相互作用的非线性力驱动块点火激光icf的趋肤深度理论

European Conference on Laser Interaction with Matter Pub Date : 2003-12-12 DOI: 10.1117/12.536769

H. Hora, J. Badziak, F. Boody, R. Hoepfl, K. Jungwirth, B. Králiková, J. Krása, L. Laska, M. Pfeifer, K. Rohlena, P. Parys, J. Skála, J. Ullschmied, J. Wołowski, E. Woryna

{"title":"Skin depth theory for nonlinear-force driven block ignition laser-ICF based on anomalous picosecond terawatt laser-plasma interaction","authors":"H. Hora, J. Badziak, F. Boody, R. Hoepfl, K. Jungwirth, B. Králiková, J. Krása, L. Laska, M. Pfeifer, K. Rohlena, P. Parys, J. Skála, J. Ullschmied, J. Wołowski, E. Woryna","doi":"10.1117/12.536769","DOIUrl":"https://doi.org/10.1117/12.536769","url":null,"abstract":"The experiment of Badziak et al has shown that irradiation of copper by 1.5 ps laser pulses produced 50 times lower maximum ion energies than the 22 MeV expected after relativistic self focusing from laser pulses of about ns duration. This discrepancy was confirmed in the following reported experiments specifically designed for this clarification, where MeV Au+30 maximum ion energies needed 400 times higher intensity with ps pulses than with 0.5 ns pulses. Comparing the theory for generating the fastest ions by relativistic self focusing and of the second fastest group by a quiver-collision model, we arrived at the conclusion that the mentioned ps-TW-generated ions are not following these usual theories but that a skin depth model with exclusion of relativistic self focusing explains the experiments. The essential importance is the suppression of the prepulse. We conclude how the experiment by Norreys et al. with the highest ever reported fusion gains may be increased to fusion reactor conditions if our results of prepulse control and suppression of relativistic self focusing would be applied following our skin layer interaction model. This extends the fast ignitor to the nonlinear-force block ignition without plasma precompression.","PeriodicalId":340981,"journal":{"name":"European Conference on Laser Interaction with Matter","volume":"59 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-12-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131639907","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 3

Laser generated high-pressure shock wave experiments and their simulations 激光产生高压激波的实验与模拟

European Conference on Laser Interaction with Matter Pub Date : 2003-12-12 DOI: 10.1117/12.534320

V. Senecha, M. Shukla, B. K. Godwal, H. C. Pant

引用次数: 1

Dependence of the hydrogen permeability of glasses on thermal expansion and the structure connectedness factor 玻璃的氢渗透性与热膨胀和结构连通系数的关系

European Conference on Laser Interaction with Matter Pub Date : 2003-12-12 DOI: 10.1117/12.537287

E. Medvedev

引用次数: 0

Electron acceleration by few-cycle laser pulse with single-wavelength spot size 单波长光斑尺寸的少周期激光脉冲的电子加速

European Conference on Laser Interaction with Matter Pub Date : 2003-12-12 DOI: 10.1117/12.536958

G. Dudnikova, V. Bychenkov, A. Maksimchuk, G. Mourou, J. Nees, S. G. Bochkarev, V. Vshivkov

引用次数: 0

Reduction of the spatial coherence of a laser beam propagating in an underdense semicollisional plasma 在低密度半碰撞等离子体中传播的激光束空间相干性的降低

European Conference on Laser Interaction with Matter Pub Date : 2003-12-12 DOI: 10.1117/12.537090

P. Michel, C. Labaune, G. Bonnaud, J. Fuchs, H. Bandulet, S. Depierreux, G. Riazuelo, F. Walraet

引用次数: 0

2D-Lagrangian code LATRANT for simulation radiation gas dynamic problems 模拟辐射气体动力学问题的二维拉格朗日代码LATRANT

European Conference on Laser Interaction with Matter Pub Date : 2003-12-12 DOI: 10.1117/12.536544

E. Aristova, A. Iskakov, I. Lebo, V. Tishkin

引用次数: 6

Study of properties and preparation conditions of plasmochemical SiO2 films 等离子体化学SiO2薄膜的性能及制备条件研究

European Conference on Laser Interaction with Matter Pub Date : 2003-12-12 DOI: 10.1117/12.537457

V. M. Izgorodin, Yu. V. Tolokonnikova, A. A. Aushev, A. I. Vasil'eva, V. G. Gogolev, A. F. Kovylov, E. G. Orlikova, I. G. Sevrugin

{"title":"Study of properties and preparation conditions of plasmochemical SiO2 films","authors":"V. M. Izgorodin, Yu. V. Tolokonnikova, A. A. Aushev, A. I. Vasil'eva, V. G. Gogolev, A. F. Kovylov, E. G. Orlikova, I. G. Sevrugin","doi":"10.1117/12.537457","DOIUrl":"https://doi.org/10.1117/12.537457","url":null,"abstract":"The results of research of properties and preparation conditions of the plasmochemical SiO2 films are submitted. These films coated various substrates (glass, metals, NaCl). Film deposition was carried out by decomposition of the tetraethoxycilane vapor by the electrical discharge with the frequency of about 18 kHz. The excessive products of decomposition were pumped out with maintenance of the tetraethoxycilane vapor and argon pressure of about 0.2 Torr. The study of element structure has shown that the film represents SixOy with x ≈ 1 and y ≈ 2 and contains an impurity of organic inclusions. Density and index of refraction of a coating are close to these parameters for glass SiO2. The form of the film surface is investigated depending on the coating conditions. Infrared spectra of absorption and Raman spectra are investigated. The results of attempts of the iodine in this film as an impurity are given. This method is applied for preparing of the covering with uniform thickness on glass microspheres used as targets in laser fusion experiments on the installation \"Iskra-5.\"","PeriodicalId":340981,"journal":{"name":"European Conference on Laser Interaction with Matter","volume":"11 1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-12-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124277980","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0