736 research outputs found
A Call to Action: Lessons from Ukraine for the Future Force
No full textJohn A. Nagl, Project DirectorKatie Crombe, Chief of Staff
This book explores the changing character of war through the lens of the Russia-Ukraine War. The authors analyze the conflict’s history, each side’s warfighting functions, the role of multidomain operations, and more. The radical changes in the character of war suggest the United States is at a strategic inflection point. The authors draw lessons from both the Ukrainians and the Russians to suggest improvements for the United States. Advances in drone technology, cyber warfare, and electromagnetic warfare pose new technological vulnerabilities and possibilities. In addition, the war has highlighted the roles of allies in deterrence and training as well as how leadership styles within the military—specifically, in the implementation of mission command—can be a decisive factor. As the Russia-Ukraine War has demonstrated, modern conflict touches a plethora of domains; thus, having sufficient personnel who are ready to fill a variety of capacities will be critical in the future. Finally, the war has shown history and justice are critical aspects of going to war and achieving peace, so crafting a narrative and satisfying stakeholders will be necessary for establishing a stable world order. The Russia-Ukraine War foreshadows the challenges the United States will face in future conflict and highlights the keys to adapting to modern warfare.
Researchers: Gabriella N. Boyes, John “Jay” B. Bradley III, Larry D. Caswell Jr., Steven L. Chadwick, Jingyuan Chen, Jason Du, Brian A. Dukes, Volodymyr Grabchak, Matthew S. Holbrook, Clay M. Huffman, Rebecca W. Jensen, Jamon K. Junius, Thomas R. Kunish, Jason R. Lojka, Albert F. Lord Jr., Syeda Myra Naqvi, Dennis M. Sarmiento, Vincent R. Scauzzo, Povilas J. Strazdas, Marlon A. Thomas, Stephen K. Trynosky, Darrick L. Wesson, Sean M. Wiswesser
Interns: Max Blumenfeld, Bridget Butlerhttps://press.armywarcollege.edu/monographs/1964/thumbnail.jp
Development of an experimental facility for the study of microparticle initiated radio frequency vacuum breakdown
No full textAn ongoing objective in the ion cyclotron range of frequencies (ICRF) systems is the improvement of power coupling to the plasma. During the last decade, this goal has been mainly pursued through the study of the coupling resistance, either by optimizing the antenna layout or by tailoring the scrape-off layer profile with gas puffing. Another approach is to increase the voltage handling capability of the ICRF system, limited by breakdown in the launchers or in the transmission lines. This paper describes the design of the ICRF Breakdown EXperiment (IBEX), a device to investigate fundamental aspects of radio frequency arcs under ICRF-relevant conditions. IBEX can achieve a peak voltage of 48 kV at 54 MHz with a 5 kW input power
Experimental analysis of the particle transport in the magnetized plasma column with an application to the helicon discharge
No full textInternational audienceDifferent transport mechanisms in a magnetized radio frequency plasmadischarge in the IShTAR device are compared. The total cross fieldparticle transport systematically shows the best agreement with theturbulent diffusion. Also, the ion mobility dominated transport couldsubstantially contribute to radial losses. The relative role of paralleland perpendicular losses in the overall particle confinement is alsocompared. The total perpendicular particle losses are comparable or evenlarger than the parallel ones, imposing a practical limitation onachieving high density plasma simply combining several helicon antennaesequentially arranged along the glass tube. For the same reason,reducing the diameter of a source tube, in an attempt to achieve ahigher plasma density, could be not very efficient when perpendicularparticle loss is dominant
Improved charge exchange spectroscopy on the Joint European Torus for ion temperature and rotation velocity profiles
No full textSimulations of the formation of a transport barrier in four channels including turbulent poloidal momentum, spinup
No full textSimulation of the formation of transport barriers including the generation of poloidal spinup due to turbulence
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Comparison of External and Internal Transport Barriers in Drift Wave Predictive Simulations
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