Refractory Metal Facings for Protection of Metal Surfaces Subjected to Repeated High-Temperature Pulses

1959 ◽  
Vol 81 (2) ◽  
pp. 197-202
Author(s):  
Aaron Cohen ◽  
Edward Homer
Keyword(s):  
Refractory Metal ◽  
Peak Power ◽  
Direct Relationship ◽  
High Energy ◽  
Analytical Determination ◽  
High Peak Power ◽  
Resonant Structure ◽  
High Energy Electrons ◽  
The Impact

Because the operating frequency of a magnetron has a direct relationship to the size of the resonant structure, the power at a given frequency that can be obtained from a magnetron may be limited by the temperature which the resonating structure can withstand. A rise in the temperature of the resonant structure is caused by the impact of high-energy electrons emitted from the cathode at high peak-power levels for short durations. This paper deals with the analytical determination of the temperature of the resonant structure, a solution to the heat problem in which a thin coating of refractory metal is used to prevent the vulnerable components from melting, and some experimental results to verify the analysis.

Analysis and Design of Coherent Combining of two Q-Switched Fiber Laser in Mach-Zehnder Type Cavity

2019 ◽  
Vol 40 (4) ◽  
pp. 393-400
Author(s):  
Ali Nassiri ◽  
Hafida Idrissi-Saba ◽  
Abdelkader Boulezhar
Keyword(s):  
Fiber Laser ◽  
Peak Power ◽  
High Energy ◽  
Nanosecond Pulse ◽  
High Peak ◽  
High Peak Power ◽  
Analysis And Design ◽  
Coupled Cavities ◽  
Combining Efficiency ◽  
Coherent Combining

Abstract In this work, we have developed an analytical model of an actively Q-switched Ytterbium-doped fiber laser by using two coupled cavities with amplifying fibers in Mach–Zehnder interferometer configuration. This oscillator system provides high peak power and high energy nanosecond pulse. The pulse energy is almost twice the energy of an individual fiber laser with a combining efficiency goes up 99%. This concept brings some novel perspectives for scaling the high energy and high peak power of nanosecond pulse fiber laser.

High Peak Power and High Energy Fiber Amplifiers

2006 ◽  
Author(s):  
John Minelly ◽  
Fabio Teodoro ◽  
Matthias Savage-Leuchs ◽  
Deborah Alterman ◽  
Christopher Brooks ◽  
...  
Keyword(s):  
Peak Power ◽  
High Energy ◽  
Fiber Amplifiers ◽  
High Peak ◽  
High Peak Power

High-peak-power, high-energy, high-average-power pulsed fiber laser system with versatile pulse duration and shape

2013 ◽  
Vol 38 (22) ◽  
pp. 4686 ◽  
Author(s):  
A. Malinowski ◽  
P. Gorman ◽  
C. A. Codemard ◽  
F. Ghiringhelli ◽  
A. J. Boyland ◽  
...  
Keyword(s):  
Fiber Laser ◽  
Pulse Duration ◽  
Peak Power ◽  
Laser System ◽  
Average Power ◽  
High Energy ◽  
High Peak ◽  
High Peak Power ◽  
High Average Power ◽  
Pulsed Fiber Laser

High-energy high-peak-power diode-pumped solid state laser for materials processing

1996 ◽  
Author(s):  
Sheldon B. Hutchison ◽  
Alexandra M. Berezinskaya ◽  
Alan B. Petersen ◽  
Jan-Willem J. Pieterse ◽  
William L. Nighan, Jr. ◽  
...  
Keyword(s):  
Solid State ◽  
Peak Power ◽  
High Energy ◽  
Solid State Laser ◽  
High Peak ◽  
Materials Processing ◽  
High Peak Power ◽  
State Laser ◽  
Diode Pumped ◽  
Power Diode

scholarly journals A Fuzzy Best Worst approach to the determination of the importance level of digital supply chain on sustainability

2021 ◽  
Vol 9 (4) ◽  
pp. 1366-1379
Author(s):  
Kevser Arman ◽  
Arzu Organ
Keyword(s):  
Supply Chain ◽  
Direct Relationship ◽  
Digital Technologies ◽  
The Other ◽  
Social Dimension ◽  
Other Hand ◽  
The Impact ◽  
Day By Day ◽  
Best Worst Method

In today's world where the importance of digitalization is increasing day by day, companies to increase their competitiveness have focused on digital supply chain instead of traditional supply chain. In a world where resources are constantly decreasing, the concept of sustainability has become very crucial in every part of life. Digital technologies, on the other hand, have a direct relationship with sustainability. Sustainability has three main dimensions: economic, environmental, and social. Therefore, the aim of this study is to evaluate digital supply chain on 3 basic dimensions of sustainability. For this purpose, Fuzzy Best Worst Method (F-BWM) was used to define the importance level of criteria. Findings reveal that the concept of sustainability in textile firms in Turkey is generally perceived within an economic and environmental area, rather than within a social dimension. This study is very important in putting forward digital technologies which utilizing in supply chain and the impact of the digital supply chain on sustainability.

High energy, high peak power diode pumped solid state lasers for materials processing

1996 ◽  
Author(s):  
Sheldon B. Hutchison ◽  
Alexandria M. Berezinskaya ◽  
Alan B. Petersen ◽  
Jan-Willem Pieterse ◽  
William L. Nighan ◽  
...  
Keyword(s):  
Solid State ◽  
Peak Power ◽  
High Energy ◽  
High Peak ◽  
Materials Processing ◽  
High Peak Power ◽  
Solid State Lasers ◽  
Diode Pumped ◽  
Power Diode

scholarly journals A superconducting switch actuated by injection of high-energy electrons

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
M. F. Ritter ◽  
A. Fuhrer ◽  
D. Z. Haxell ◽  
S. Hart ◽  
P. Gumann ◽  
...  
Keyword(s):  
Critical Current ◽  
Electric Fields ◽  
Physical Mechanism ◽  
High Energy ◽  
Critical Currents ◽  
Metal Nanowires ◽  
Resistive State ◽  
Gate Electrodes ◽  
High Energy Electrons ◽  
The Impact

AbstractRecent experiments with metallic nanowires devices seem to indicate that superconductivity can be controlled by the application of electric fields. In such experiments, critical currents are tuned and eventually suppressed by relatively small voltages applied to nearby gate electrodes, at odds with current understanding of electrostatic screening in metals. We investigate the impact of gate voltages on superconductivity in similar metal nanowires. Varying materials and device geometries, we study the physical mechanism behind the quench of superconductivity. We demonstrate that the transition from superconducting to resistive state can be understood in detail by tunneling of high-energy electrons from the gate contact to the nanowire, resulting in quasiparticle generation and, at sufficiently large currents, heating. Onset of critical current suppression occurs below gate currents of 100fA, which are challenging to detect in typical experiments.

Sign in / Sign up

Export Citation Format

Share Document