Energy Efficiency
PPPL physicist Ammar Hakim, left, and graduate student Noah Mandell with figures from Mandell's paper showing the first computer simulations of kinetic plasma turbulence near the edge of fusion devices that can account for fluctuations of magnetic field lines.
Professor Jae Eun Jang (back) and Ms. Su Jin Heo (front) next to their experimental setup, with which they observed how cracks formed and propagated in thin flexible conductors with various types of micro-hole arrays.
Scanning electron microscope image of electrodes infiltrated with quantum dots (left) and the corresponding distributions of Cu, In, Zn and Se across the film thickness.
The molecular structure of the new polymer glass facilitated the movement of protons (H+) across it under dry conditions at 120°C.
Pero-SCs based on blade-coated BDT-TPA-sTh HTL and MAPbI3 active layer: (a) J-V curves in the reverse-scan direction; inset: schematic illustration of blade-coated HTLs. (b) J-V curves of a 1-cm2 pero-SC module in the reverse-scan direction; inset: schematic illustration of device-structure of modules.
The Transformational Challenge Reactor Demonstration Program uses thermal imaging to actively monitor the direct deposition of stainless steel to 3D print a component. The hexagonal structure took close to 40 hours to build, with temperatures reaching over 1,400 degrees Celsius around the melt pool where a laser heats and melts while adding a new layer.
Propagation of an "ultra-lean" hydrogen flame in a very narrow combustion chamber. The images on the left show a flame propagating vertically downward; those on the right are burning in the opposite direction. The dark markings show the path followed by the flame, while the lighter parts show the hydrogen that has not been burned.
This is defective graphene.
A schematic diagram of a prototype microwave air plasma thruster and the images of the bright plasma jet at different microwave powers. This device consists of a microwave power supply, an air compressor, a compressed microwave waveguide and a flame ignitor.
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Table 1: Switch states for a 3L-NPC phase leg
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Figure 1: The stacked SiC FET cascode with an Si-MOSFET die on the source pad of a SiC JFET and its equivalent circuit
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Figure 1. 12 V, 8 A application using LT8645S at 400 kHz
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Figure 1: Core losses for a typical ferrite material – source Ferroxcube 3C90 data
Figure 1: Replacing a SJ with a SiC MOSFET, switching loss decreases significantly
The twist angle between the layers governs the crystal symmetry and can lead to a variety of interesting physical behaviours, such as unconventional superconductivity, tunnelling conductance, nonlinear optics and structural super-lubricity.
Illustration of a 3D-printed concrete suction pile anchor for connecting floating wind turbines to the seabed via mooring lines.
