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Timing System Development for RAON Operation
The Rare Isotope Accelerator complex for ON-line experiments (RAON) is a heavy-ion accelerator experiment facility under construction in Korea. This...
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SRF Test Facility Signal Archiving System for the RAON
The Rare Isotope Science Project (RISP) of the Institute for Basic Science (IBS) has been develo** a heavy-ion accelerator, called the Rare isotope...
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WOA-Based Echo State Network for Chaotic Time Series Prediction
We present a new chaotic times prediction model inspired by the bubble-net predation of whales. The echo state network (ESN) is a new type of...
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Commissioning progress of the FAST
The Five-hundred-meter Aperture Spherical radio Telescope (FAST) was completed with its main structure installed on September 25, 2016, after which...
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QKD system with fast active optical path length compensation
We develop a quantum key distribution (QKD) system with fast active optical path length compensation. A rapid and reliable active optical path length...
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Wave propagation simulation based on the Fourier diffraction integral for X-ray refraction contrast imaging-computed tomography
With the advent of coherent X-ray sources, X-ray refraction has begun to be utilized for X-ray imaging of unprecedented sensitivity. The aim of this...
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A beam flexure-based nanopositioning stage supporting laser direct-write nanofabrication
A nanopositioning system of both millimetric stroke and nanometric tracking accuracy is a key component for nanofabrication in many applications. In...
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Stability evaluation and improvement of adaptive optics systems by using the Lyapunov stability approach
In this research, investigations on the closed-loop control stability of adaptive optics systems are conducted by using the Lyapunov approach. As an...
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FPGA based digital phase-coding quantum key distribution system
Quantum key distribution (QKD) is a technology with the potential capability to achieve information-theoretic security. Phasecoding is an important...
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General algorithm and method for scanning a via hole by using critical-dimension atomic force microscopy
As semiconductor devices currently are integrated with high density, they are converted into 3-dimensional form. The interconnections between the...
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Control of orientation for spacecraft formations in the vicinity of the Sun-Earth L2 libration point
Formation flying in the vicinity of the libration point is an important concept for space exploration and demands reliable and accurate techniques...
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Mixture steering law design for control moment gyroscopes
Focusing on the singularities of a spacecraft using control moment gyros (CMGs) to do the large angle maneuvers, a new mixture steering law is...
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Prototy** and low-level testing of a 13-MHz digital radio-frequency control system for the PEFP 120-keV heavy ion implanter
The Proton Engineering Frontier Project (PEFP) finished a radio-frequency (RF) implanter. Due to mechanical vibration and temperature slow change in...
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Design and test of a resonance control system for suppressing the pump vibration effects for the PEFP 13-MHz RF cavity
The Proton Engineering Frontier Project developed a 13-MHz pulsed, RF cavity for heavy-ion implanter applications. Typically, slow changes in the...
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Posicast control of a class of fractional-order processes
The number of studies on the control of fractional-order processes—processes having dynamics described by differential equations of arbitrary...
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Orbit control strategy for Lagrange point orbits based on an analytical method
The periodic or quasi-periodic orbits around collinear Lagrange points present many properties that are advantageous for space missions. These...
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Design and development progress of a LLRF control system for a 500 MHz superconducting cavity
The LLRF (low-level radio-frequency) control system which regulates the amplitude and the phase of the accelerating voltage inside a RF cavity is...
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A low-level rf control system for a quarter-wave resonator
A low-level rf control system was designed and built for an rf deflector, which is a quarter wave resonator, and was designed to deflect a secondary...
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An analysis of seismic attenuation in random porous media
The attenuation of seismic wave in rocks has been one of the interesting research topics, but till now no poroelasticity models can thoroughly...
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A digital oscillation-amplitude stabilizer
The design of a stabilizer of the oscillation amplitude of a mechanical oscillator is described. The stabilizer is characterized by digital tracking...