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| 1 | ARCTURUS laser: a versatile high-contrast,high-power multi-beam laser system显示文摘With the latest configuration,the Ti:Sa laser system ARCTURUS(Düsseldorf University,Germany)operates with a double-chirped pulse amplification(CPA)architecture delivering pulses with an energy of 7 J before compression in each of the two high-power beams.By the implementation of a plasma mirror system,the intrinsic laser contrast is enhanced up to 10^-12 on a time scale of hundreds of picoseconds,before the main peak.The laser system has been used in various configurations for advanced experiments and different studies have been carried out employing the high-power laser beams as a single,high-intensity interaction beam(I≈1020 W/cm^2),in dual-and multi-beam configurations or in a pump–probe arrangement. | M.Cerchez R.Prasad B.Aurand A.L.Giesecke S.Spickermann S.Brauckmann E.Aktan M.Swantusch M.Toncian T.Toncian O.Willi | 2019 | High Power Laser Science and Engineering2019，7，3： | 1 |
| 2 | 采用膜分离制氮显示文摘本文就美国联碳工业气体公司所生产的膜分离制氮装置的流程选择和设计、机械结构、控制装置功能、负载跟踪、操作经验及适用性进行了详细介绍,并指出随着高效薄膜材料的开发,该设备的应用范围将越来越大。图10。 | D.R.Thompson R.Prasad C.F.Gottzmann W.Reul-Hecren 郑丽碧 | 1994 | 深冷技术1994，，4： | 0 |
| 3 | Fabrication of micrometre-sized periodic gratings in free-standing metallic foils for laser-plasma experiments显示文摘Engineered targets are expected to play a key role in future high-power laser experiments calling for joined, extensive knowledge in materials properties, engineering techniques and plasma physics. In this work, we propose a novel patterning procedure of self-supported 10 μm thick Au and Cu foils for obtaining micrometre-sized periodic gratings as targets for high-power laser applications. Accessible techniques were considered, by using cold rolling, electronbeam lithography and the Ar-ion milling process. The developed patterning procedure allows efficient control of the grating and foil surface on large area. Targets consisting of patterned regions of 450 μm × 450 μm, with 2 μm periodic gratings, were prepared on 25 mm × 25 mm Au and Cu free-standing foils, and preliminary investigations of the microtargets interacting with an ultrashort, relativistic laser pulse were performed. These test experiments demonstrated that,in certain conditions, the micro-gratings show enhanced laser energy absorption and higher efficiency in accelerating charge particle beams compared with planar thin foils of similar thickness. | C.C.Gheorghiu M.Cerchez E.Aktan R.Prasad F.Yilmaz N.Yilmaz D.Popa O.Willi V.Leca | 2022 | High Power Laser Science and Engineering2022，10，1： | 0 |
| 4 | Relativistic electron acceleration by surface plasma waves excited with high intensity laser pulses显示文摘The process of high energy electron acceleration along the surface of grating targets(GTs)that were irradiated by a relativistic,high-contrast laser pulse at an intensity I=2.5×10^20 W/cm^2 was studied.Our experimental results demonstrate that for a GT with a periodicity twice the laser wavelength,the surface electron flux is more intense for a laser incidence angle that is larger compared to the resonance angle predicted by the linear model.An electron beam with a peak charge of∼2.7 nC/sr,for electrons with energies>1.5 MeV,was measured.Numerical simulations carried out with parameters similar to the experimental conditions also show an enhanced electron flux at higher incidence angles depending on the preplasma scale length.A theoretical model that includes ponderomotive effects with more realistic initial preplasma conditions suggests that the laser-driven intensity and preformed plasma scale length are important for the acceleration process.The predictions closely match the experimental and computational results. | X.M.Zhu R.Prasad M.Swantusch B.Aur A.A.Andreev O.Willi M.Cerchez | 2020 | High Power Laser Science and Engineering2020，8，2： | 0 |
| 5 | 评价铸件质量的最新超声技术显示文摘本文介绍了用超声技术测定铸铁的一些参数及评价其质量。就连续铸造而言,已用超声C型扫描技术测定铸坯的枝晶结构,这是控制连续铸造凝固过程的重要手段之一。 | R.Prasad 夏仁凯 | 1990 | 铸造1990，39，6： | 0 |
| 6 | 可持续的地表自然资源管理显示文摘 | B.L.Gajja J.C.Tiwari R.Prasad | 2002 | 中国水土保持2002，，7： | 0 |
| 7 | The distribution of parotid gland neoplasms in a veteran population显示文摘Objective:Salivary gland tumors account for 6%-8%of head and neck neoplasms with the parotid gland as the most common primary site.Pleomorphic adenomas(PA)are considered the most common benign parotid gland neoplasms,followed by Warthin tumors(WT).The goal of this study was to investigate the distribution of parotid gland neoplasms among a United States veteran population.Design:Retrospective chart review.Setting:Washington DC Veterans Affairs Medical Center.Participants:Veterans who underwent fine needle aspiration(FNA)for a parotid gland mass from 2000 to 2018 were included.Medical records were reviewed for gender,age,tobacco use,surgery date,and pathology results.Main outcome measures:Changes in the distribution of parotid neoplasms and tobacco use over an 18-year period.Results:Of 141 patients with parotid gland masses,86.5%(n=122)were benign,9.9%(n=14)were malignant,and 3.5%(n=5)were indeterminate.Of benign tumors,WT accounted for the majority at 51.6%,followed by PA at 40.2%.When stratified by decade(2000-2009 and 2010-2018),the proportion of WT compared to all other benign and malignant neoplasms increased from 31.6%to 53.6%,whereas the proportion of PA decreased from 36.8%to 33.3%.The rate of tobacco use was unchanged at approximately 32.0%among our cohort from 2000 to 2018.Conclusion:Among our cohort of veteran patients,WT was the most common benign parotid tumor and has increased in incidence over the last two decades despite an unchanged smoking rate. | Adnan S.Hussaini Navin R.Prasad Edina Paal Eshetu A.Tefera Sonya Malekzadeh Jessica H.Maxwell | 2021 | World Journal of Otorhinolaryngology-Head and Neck Surgery2021，7，4： | 0 |
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