A5114889263- Particle Accelerators and Free-Electron Lasers
- Particle accelerators and beam dynamics
- Superconducting Materials and Applications
- Advanced Fiber Optic Sensors
- Photonic and Optical Devices
- Gyrotron and Vacuum Electronics Research
- Advanced Fiber Laser Technologies
- Magnetic confinement fusion research
- Adaptive optics and wavefront sensing
- Astronomy and Astrophysical Research
- Numerical methods for differential equations
- Stellar, planetary, and galactic studies
- Particle Detector Development and Performance
- Optical Systems and Laser Technology
- Laser-Plasma Interactions and Diagnostics
- Advanced optical system design
- Semiconductor Lasers and Optical Devices
- Advanced Measurement and Metrology Techniques
- Nonlinear Photonic Systems
- Advancements in Photolithography Techniques
- Advanced Optical Sensing Technologies
- Optical Coatings and Gratings
- Electromagnetic Simulation and Numerical Methods
- Spectroscopy Techniques in Biomedical and Chemical Research
- Mechanical and Optical Resonators
Kyushu University
2025
Harbin Engineering University
2012-2024
Ministry of Industry and Information Technology
2023-2024
Hainan University
2023
University of Chinese Academy of Sciences
2016-2018
National Astronomical Observatories
2015-2018
Chinese Academy of Sciences
2015-2018
Daimler (Germany)
2017
SLAC National Accelerator Laboratory
1995-2014
Menlo School
2006-2014
Abstract Fiber scrambling is integral to high-precision calibration systems for radial velocity (RV) measurements, crucial in the quest exoplanet discovery. Coherent light sources, like laser frequency combs, often induce speckles, a form of modal noise, which can result spectra errors. The starlight collected astronomical observations polychromatic light. This study investigates speckle-like mode noise generated under incoherent light, identifying clear correlation between fiber length and...
Abstract This paper proposes a subpixel transformation method to correct Keystone and Smile distortions in fiber spectral images from the Fiber Arrayed Solar Optical Telescope. These affect spatial positions, degrading resolution accuracy. To distortion, we use local summation peak-finding locate central horizontal coordinates, calculate shifting values, straighten curves. For quartic polynomial fitting based on absorption lines at different wavelengths. technique preserves components,...
Understanding the chemistry of molecular clouds is pivotal to elucidate star formation and galaxy evolution. As one important ions, HCNH^+ plays an role in this chemistry. Yet, its behavior significance under extreme conditions, such as central zones (CMZs) external galaxies, are still largely unexplored. We aim reveal physical chemical properties CMZ starburst NGC 253 with multiple transitions shed light on molecule's conditions a starburst. employed line data including results for four...
Abstract Drug delivery systems (DDSs) capable of sequential multistage drug release are urgently needed for antibacterial applications. Herein, a molecular switch‐integrated, photo‐responsive nanoplatform is reported based on hollow mesoporous silica nanospheres (HMSN) loaded with silver nanoparticles (Ag NPs), vancomycin (Van), and hemin (HAVH) bacteria elimination abscess therapy. Upon near‐infrared (NIR) light irradiation, the switch, hemin, can effuse from mesopores HMSN, triggering...
Using a singular value decomposition of beam line matrix, composed many position measurements for large number pulses, together with the measurement pulse-by-pulse properties or machine attributes, contributions each variable to centroid motion can be identified greatly improved resolution. The eigenvalues above noise floor determine significant physical variables. This method is applicable storage rings, linear accelerators, and any system involving sources larger sensors unknown...
We investigated and prepared a chirped long-period grating for high sensitivity bending measurement. The novel fiber structure is composed of the multimode (MMF) with fixed length gradually longer single-mode using continuous splicing method. powerful ability refractive index modulation in MMF renders miniaturization sensor. total sensor 3.45 mm. Chirped period arrangement adopted to improve sensitivity. Through numerical calculation, chirp coefficient determined, clear resonance peaks are...
Synchrotron motion with rf phase modulation was studied experimentally. Poincaré maps in the resonant precessing frame were obtained from experimental data and compared tori of Hamiltonian. Our revealed island structure longitudinal space. Experimental results for synchrotron excited by at third harmonic frequency are also reported.Received 28 June 1993DOI:https://doi.org/10.1103/PhysRevE.48.4678©1993 American Physical Society
The synchroton motion of a beam was tracked for the first time by digitizing phase signal from high bandwidth wall gap monitor relative to rf and momentum deviation with transverse position measurement in dispersion region. measured synchrotron tune as function amplitude agrees well theory. When stable angle modulated harmonically, response showed characteristics chaos bifurcations parametric resonant system. Manipulating system create islands space may offer applications future hadron...
The genetic algorithm (GA) has been a popular technique in optimizing the design of particle accelerators. As population based algorithm, GA requires large number evaluations objective functions, which can be time consuming. One benefit from parallel computing with significantly reduced when fulfilling function evaluation by numerical machine model simulation codes. Indeed, this is most common approach applications. In paper, instead applying conventional calculations as described above, we...
A Mach-Zehnder interferometer, composed of two core-offset tapered joints (COTJ-MZI), is proposed and experimentally verified for high sensitivity strain sensing. The COTJ-MZI handily fabricated by fusion splicing tapering based on all single-mode fiber (SMF). cores form stepped within the COTJs. transmission spectra with different values interference lengths are obtained theoretically analyzed. Benefitting from in COTJ structure, mode coupling points able to be modulated easily applied...
Synchro-betatron coupling in a proton storage ring with electron cooling was studied experimentally by modulating transverse dipole field close to the synchrotron frequency. The combination of and modulation on oscillation is equivalent dissipative parametric resonant system. bunch observed split longitudinally into two pieces, or beamlets, converging toward attractors These phenomena might be important understanding effect ground vibration Superconducting Super Collider beam, power supply...
An object-oriented accelerator design code has been designed and implemented in a simple modular fashion. It contains all major features of its predecessors: TRACY DESPOT. All physics single-particle dynamics is based on the Hamiltonian local frame component. Components can be moved arbitrarily three dimensional space. Several symplectic integrators are used to approximate integration Hamiltonian. A differential algebra class introduced extract Taylor map up arbitrary order. Analysis optics...
A novel, to the best of our knowledge, type compact pH fiber sensor combined with a hydrogel based on whispering gallery mode (WGM) is proposed and integrates liquid crystal (LC) microdroplet in capillary structure as small 180 µm. In research, performs both supporting frame responsive material that causes morphological deformation LC variation. Moreover, new phenomenon pH-induced refractive index variation observed applied measurement, so acid itself can also lead transition. Thus, WGM...
Synchrotron motion with an external rf voltage modulation was studied experimentally. Beam particles, in the presence of electron cooling, were observed to damp basins resonance islands, which produced by parametric due modulation. The measured phase amplitudes centers these islands found agree well theory.
The horizontal transfer of drug-resistant genes and the formation biofilm barriers have threatened therapeutic efficacy conventional antibiotic drugs. Development non-antibiotic agents with high delivery efficiency through bacterial biofilms is urgently required. A pyrithione (PT)-loading zeolitic imidazolate framework (ZIF-8@PT) synthesized to destroy improve sensitivity bacteria PT. ZIF-8@PT can target as well cell membrane, promoting intracellular PT possibly its interaction SmpB, a...
We propose a high-sensitivity bidirectional torsion sensor using helical seven-core fiber taper embedded in multimode (MHSTM). Sensors with different waists and pitches are fabricated, their transmission spectra obtained analyzed. The waist length of the sandwiched finally determined to be 68 µm 3 mm, respectively. experimental results show that clockwise counterclockwise sensitivities proposed 2.253 nm/(rad/m) -1.123 nm/(rad/m), When tapered diameter reduces 48 µm, superior sensitivity...
In the process of acquiring astronomical spectral data, alignment accuracy between fiber core in focal plane and image target star is crucial for multi-target telescopes. This work presents a Special-shaped Micro-lens Aimer Real-time Targeting (SMART), which combines special-shaped microlens bundle to carry out online alignments improve injection efficiency fiber. The consists central plate six side microlenses. transfers signal science without ratio degradation. microlenses focus leakage...
The synchro-betatron coupling induced by modulating a transverse dipole field at frequency close to the synchrotron was studied experimentally. combination of electron cooling and transverse-field modulation on oscillation is equivalent dissipative parametric resonant system. Six-dimensional Poincaré maps were measured ten-turn intervals. proton bunch observed split longitudinally into two pieces, or beamlets, converging toward attractors system within rf bucket. Based our experimental...