Attractive levitation for high-speed ground transport with large guideway clearance and alternating-gradient stabilization

High Speed Ground Transportation

Slowing heavy, ground-state molecules using an alternating gradient decelerator.

We have decelerated a supersonic beam of 174YbF molecules using a switched sequence of electrostatic field gradients. These molecules are 7 times heavier than any previously decelerated. An alternating gradient structure allows us to decelerate and focus the molecules in their ground state. We show that the decelerator exhibits the axial and transverse stability required to bring the molecules ...

Alternating-gradient focusing and deceleration of large molecules

Exploiting the Stark effect, neutral polar molecules can be focused and decelerated in an array of time-varying inhomogeneous electric fields in alternatinggradient configuration. Using this principle, a new experiment for the focusing and deceleration of large molecules from a molecular beam has been set up. With the new setup, the alternating-gradient focusing and deceleration of benzonitrile...

New conditions on ground state solutions for Hamiltonian elliptic systems with gradient terms

This paper is concerned with the following elliptic system:$$ left{ begin{array}{ll} -triangle u + b(x)nabla u + V(x)u=g(x, v), -triangle v - b(x)nabla v + V(x)v=f(x, u), end{array} right. $$ for $x in {R}^{N}$, where $V $, $b$ and $W$ are 1-periodic in $x$, and $f(x,t)$, $g(x,t)$ are super-quadratic. In this paper, we give a new technique to show the boundedness of Cerami sequences and estab...

Design and Control of Levitation and Guidance Systems for a Semi-High-Speed Maglev Train

Research on Maglev (Magnetic Levitation) train is currently being conducted in Korea, concerning Urban Transit (110 km/h of maximum speed), semi-high-speed (200 km/h of maximum speed), and high-speed (550 km/h of maximum speed) trains. This paper presents a research study on the levitation and guidance systems for the Korean semi-high-speed maglev train. A levitation electromagnet was designed,...