scholarly journals Heat wave fast ignition in inertial confinement energy

2013 ◽  
Vol 1 (1) ◽  
pp. 44-49 ◽  
Author(s):  
Shalom Eliezer ◽  
Shirly Vinikman Pinhasi
Keyword(s):  
Heat Wave ◽  
Present Model ◽  
Picosecond Laser ◽  
Fast Ignition ◽  
High Impact ◽  
Inertial Confinement ◽  
Time Duration ◽  
Nanosecond Lasers ◽  
Short Time ◽  
Very High

AbstractAn accelerated micro-foil is used to ignite a pre-compressed cylindrical shell containing deuterium–tritium fuel. The well-known shock wave ignition criterion and a novel criterion based on heat wave ignition are developed in this work. It is shown that for heat ignition very high impact velocities are required. It is suggested that a multi-petawatt laser can accelerate a micro-foil to relativistic velocities in a very short time duration (˜picosecond) of the laser pulse. The cylindrical geometry suggested here for the fast ignition approach has the advantage of geometrically separating the nanosecond lasers that compress the target from the picosecond laser that accelerates the foil. The present model suggests that nuclear fusion by micro-foil impact ignition could be attained with currently existing technology.

scholarly journals Relativistic acceleration of micro-foils with prospects for fast ignition

2012 ◽  
Vol 30 (2) ◽  
pp. 225-231 ◽  
Author(s):  
Shalom Eliezer
Keyword(s):  
Cylindrical Shell ◽  
Laser Pulse ◽  
Heat Wave ◽  
Ponderomotive Force ◽  
Picosecond Laser ◽  
Fast Ignition ◽  
Solid Target ◽  
Time Duration ◽  
Short Time

AbstractIn this work, it is suggested that the ponderomotive force, induced by a multi-petawatt laser on the interface of a vacuum with solid target, can accelerate a micro-foil to relativistic velocities. The extremely high velocities of the micro-foil can be achieved due to the very short time duration (about a picosecond) of the laser pulse. This accelerated micro-foil is used to ignite a pre-compressed cylindrical shell containing the deuterium tritium fuel. The fast ignition is induced by a heat wave produced during the collision of the accelerated foil with the pre-compressed target. This approach has the advantage of separating geometrically the nanoseconds lasers that compress the target with the picosecond laser that accelerates the foil.

scholarly journals Local Wisdom and Social Dilemma Has Allergy Upon Worn Value, Proudly with Currently Values (Viewed from Social Anthropology Perspective for Orang Ocu)

2021 ◽  
Vol 2 (3) ◽  
pp. 302-315
Author(s):  
Syafrizal
Keyword(s):  
Cultural Values ◽  
Doctoral Program ◽  
Social Dilemma ◽  
Qualitative Approach ◽  
Social Anthropology ◽  
Time Duration ◽  
Long Time ◽  
Short Time ◽  
To Receive ◽  
Very High

It is noted that local wisdom is considered as an adjustable thing, flexible so that in variously social element openly to discuss it out. The main topics to discuss is to correlate local wisdom phenomenon and also found a social dilemma might arise there, such as communal activities recorded public see allergic with any old values, having proudly with newly values, it is all viewed from social anthropology perspective. This research has been done in qualitative approach within a very long time duration period calculated in completing Doctoral program in study, still to do re-study ( another research ) only done them in a short time, it has already data previously reasonable, in this case to community of Ocu on Kabupaten Kampar Riau. Accordingly, a partly of the study is categorized as ethnography research due to the source of data originally from informants chosen purposively under consideration of appropriately quality, figurative value, or someone as considered someone with much knowledge about the topic is discussing to. This study has found own very high strategic values which things can be set as instrument for criticizing even in this case with own initiative to commence re-repairmen particularly to its cultural values holed by local people whose neglect own old cultural values available, unfortunately in highly obsession to receive newly cultural values at any time having not comfortable however with the living pattern and their character in daily life, thence emerging in what generally called lost cultural with local condition is well known with  “aghokkan ujan dilangik, ayu dikulam babuangkan”.

scholarly journals A quasi-monoenergetic short time duration compact proton source for probing high energy density states of matter

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
J. I. Apiñaniz ◽  
S. Malko ◽  
R. Fedosejevs ◽  
W. Cayzac ◽  
X. Vaisseau ◽  
...  
Keyword(s):  
Energy Density ◽  
Proton Beam ◽  
Dense Matter ◽  
High Energy ◽  
High Repetition Rate ◽  
High Energy Density ◽  
Time Duration ◽  
Ultrashort Pulse Laser ◽  
Proton Source ◽  
Short Time

AbstractWe report on the development of a highly directional, narrow energy band, short time duration proton beam operating at high repetition rate. The protons are generated with an ultrashort-pulse laser interacting with a solid target and converted to a pencil-like narrow-band beam using a compact magnet-based energy selector. We experimentally demonstrate the production of a proton beam with an energy of 500 keV and energy spread well below 10$$\% $$ % , and a pulse duration of 260 ps. The energy loss of this beam is measured in a 2 $$\upmu $$ μ m thick solid Mylar target and found to be in good agreement with the theoretical predictions. The short time duration of the proton pulse makes it particularly well suited for applications involving the probing of highly transient plasma states produced in laser-matter interaction experiments. This proton source is particularly relevant for measurements of the proton stopping power in high energy density plasmas and warm dense matter.

Fast ignition by laser driven particle beams of very high intensity

2007 ◽  
Vol 14 (7) ◽  
pp. 072701 ◽  
Author(s):  
H. Hora ◽  
J. Badziak ◽  
M. N. Read ◽  
Yu-Tong Li ◽  
Tian-Jiao Liang ◽  
...  
Keyword(s):  
High Intensity ◽  
Fast Ignition ◽  
Particle Beams ◽  
Very High

EFEKTIFITAS PENDIDIKAN DAN PELATIHAN TERHADAP SELLING SKILL, KNOWLEDGE DAN BUDAYA KERJA KARYAWAN BANK ACEH CABANG IDI KABUPATEN ACEH TIMUR PASCA KONVERSI

2019 ◽  
Vol 1 (2) ◽  
pp. 19-36
Author(s):  
Zulfadly Zulfadly ◽  
Andi Tarlis
Keyword(s):  
Employee Performance ◽  
Knowledge Work ◽  
Education And Training ◽  
High Impact ◽  
Good Work ◽  
Training Effect ◽  
Work Culture ◽  
Employee Effectiveness ◽  
And Training ◽  
Very High

The formulation of the problem in this research is the effectiveness of education and training effect on Selling Skill of employees of Bank Aceh After Conversion amounting to 1220 that is on score "Very High". Does the effectiveness of education and training affect Selling Skill, Knowledge and work culture of Bank Aceh after Conversion employees? Selling Skill enters the "Very High" score ranking of 1,212, Knowledge enters the "Very High" score ranking of 1.220 and the Working Culture enters the score ranking "Very Height "of 1.213. This means that the three variables are very effective effect on employees of Bank Aceh Caban Idi East Aceh. Does the effectiveness of education and training affect the employee's work culture that has a very high impact of 1.213, this indicates that in addition to the knowledge that must be owned by employees must also have a good work culture in order to improve the performance of employees of Bank Aceh Branch Idi Aceh Timur. . Although Knowledge becomes the main point of the appraisal result, it remains that other variables should not be ruled out as they are interdependent in order to effectively improve the employee performance of Bank Aceh Branch Idi post-conversion. When viewed from the comparison between Education and Training on Selling Skill, Knowledge and Working Culture, it is known that Training is more effective than education that has a score of 1.222.This indicates that the Aceh Bank should more often provide training to employees in order to improve employee effectiveness Bank Aceh After Conversion. Keyword : Education, Training, Selling Skill, Knowledge, Work Culture   Abstrak Rumusan masalah dalam penelitian ini adalah Efektiftifitas pendidikan dan pelatihan berpengaruh pada Selling Skill karyawan Bank Aceh Pasca Konversi sebesar 1.220 yakni berada pada skor “Sangat Tinggi”. Apakah efektivitas pendidikan dan pelatihan berpengaruh pada Selling Skill, Knowledge dan budaya kerja karyawan Bank Aceh Pasca Konversi yakni Selling Skill masuk ranking skor “Sangat Tinggi” sebesar 1.212, Knowledge masuk ranking skor “Sangat Tinggi” sebesar 1.220 dan Budaya Kerja masuk ranking skor “Sangat Tinggi” sebesar 1.213. Artinya bahwa ketiga variabel tersebut sangat berpengaruh efektif terhadap karyawan Bank Aceh Cabang Idi Aceh Timur. Apakah efektifitas pendidikan dan pelatihan berpengaruh pada budaya kerja karyawan yakni terdapat pengaruh yang Sangat Tinggi sebesar 1.213, hal ini menunjukkan bahwa selain knowledge yang harus dimiliki oleh karyawan juga harus memiliki budaya kerja yang baik dalam rangka meningkatkan kinerja karyawan Bank Aceh Cabang Idi Aceh Timur. . Walaupun Knowledge (Pengetahuan) menjadi poin utama dari hasil penilaian, akan tetap variabel-variabel yang lain tetap tidak boleh dikesampingkan karena semuanya saling keterkaitan dalam rangka meningkatkan kinerja karyawan Bank Aceh Cabang Idi secara efektif pasca konversi.Jika dilihat dari perbandingan antara Pendidikan dan Pelatihan terhadap Selling Skill, Knowledge dan Budaya Kerja, maka diketahui bahwa Pelatihan lebih efektif dibandingkan dengan pendidikan yakni memiliki skor sebesar 1.222.Hal ini menandakan bahwa Bank Aceh harus lebih sering memberikan pelatihan kepada karyawan dalam rangka meningkatkan efektifitas karyawan Bank Aceh Pasca Konversi. Kata Kunci: Pendidikan, Pelatihan, Selling Skill, Pengetahuan, Budaya Kerja

scholarly journals Transport of megaelectron volt protons for fast ignition

2003 ◽  
Vol 21 (1) ◽  
pp. 33-35 ◽  
Author(s):  
C. DEUTSCH
Keyword(s):  
Kinetic Energy ◽  
Linear Analysis ◽  
Fast Ignition ◽  
Inertial Confinement ◽  
Proton Beams

Quasi-linear analysis demonstrates that intense and nonrelativistic proton beams do not lose collectively their kinetic energy through transverse Weibel electromagnetic instabilities when interacting with supercompressed plasmas of inertial confinement interest.

scholarly journals Effects of Site, Genotype and Subsequent Harvest Rotation on Willow Productivity

Agriculture ◽  
2020 ◽  
Vol 10 (9) ◽  
pp. 412 ◽  
Author(s):  
Mariusz Jerzy Stolarski ◽  
Michał Krzyżaniak ◽  
Dariusz Załuski ◽  
Józef Tworkowski ◽  
Stefan Szczukowski
Keyword(s):  
Survival Rate ◽  
Plant Height ◽  
Biomass Yield ◽  
High Impact ◽  
The Other ◽  
Plant Survival ◽  
Dry Biomass ◽  
The Mean ◽  
Very High ◽  
Biometric Features

Perennial crops harvested in short rotations provide substantial amounts of biomass. This study determined the survival rate, biometric features and yield of fresh and dry biomass of 15 willow genotypes (including seven varieties and eight clones), cultivated at two different sites in two consecutive three-year harvest rotations. The study revealed the very high impact of the genotype (81% of the total variance) on the willow yield. The harvest rotation, along with the genotype, had a significant impact on the plant survival rate and the number of shoots per stool. Willow biomass was mainly affected by the plant height, its survival rate and shoot diameter. The significantly highest fresh (106 Mg ha−1) and dry biomass yield (54.0 Mg ha−1) was obtained from the Żubr variety of S. viminalis, which distinguished this variety from the other genotypes. The mean yield for the best three and five genotypes was 13% and 17% lower, respectively, and the mean yield for the whole experiment was 37% lower compared to the mean yield of the best variety (Żubr). Therefore, the choice of a willow genotype is of key importance for successful willow production.

scholarly journals Observation of a high degree of stopping for laser-accelerated intense proton beams in dense ionized matter

2020 ◽  
Vol 11 (1) ◽  
Author(s):  
Jieru Ren ◽  
Zhigang Deng ◽  
Wei Qi ◽  
Benzheng Chen ◽  
Bubo Ma ◽  
...  
Keyword(s):  
Inertial Confinement Fusion ◽  
Dominant Role ◽  
Dense Matter ◽  
High Energy ◽  
Fast Ignition ◽  
High Energy Density ◽  
Intense Laser ◽  
High Yield ◽  
Inertial Confinement ◽  
Proton Beams

Abstract Intense particle beams generated from the interaction of ultrahigh intensity lasers with sample foils provide options in radiography, high-yield neutron sources, high-energy-density-matter generation, and ion fast ignition. An accurate understanding of beam transportation behavior in dense matter is crucial for all these applications. Here we report the experimental evidence on one order of magnitude enhancement of intense laser-accelerated proton beam stopping in dense ionized matter, in comparison with the current-widely used models describing individual ion stopping in matter. Supported by particle-in-cell (PIC) simulations, we attribute the enhancement to the strong decelerating electric field approaching 1 GV/m that can be created by the beam-driven return current. This collective effect plays the dominant role in the stopping of laser-accelerated intense proton beams in dense ionized matter. This finding is essential for the optimum design of ion driven fast ignition and inertial confinement fusion.

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