A5068004735- Particle accelerators and beam dynamics
- Particle Accelerators and Free-Electron Lasers
- Superconducting Materials and Applications
- Gyrotron and Vacuum Electronics Research
- Advanced Photonic Communication Systems
- Magnetic confinement fusion research
- Advanced Fiber Laser Technologies
- Particle Detector Development and Performance
- Photonic and Optical Devices
- Environmental and Social Impact Assessments
- Advancements in Photolithography Techniques
- Advanced DC-DC Converters
- Advancements in PLL and VCO Technologies
- Radio Frequency Integrated Circuit Design
- Heavy metals in environment
- Water Quality and Pollution Assessment
- GaN-based semiconductor devices and materials
- Radiation Therapy and Dosimetry
- Advanced X-ray Imaging Techniques
- Semiconductor Lasers and Optical Devices
Institute of High Energy Physics
2012-2024
Sichuan Agricultural University
2024
Chinese Academy of Sciences
2012-2023
University of Chinese Academy of Sciences
2012
Abstract A laser-microwave synchronization system using an all-fiber optical-microwave phase detector (AFOM-PD) has been developed and experimentally validated at the Institute of High Energy Physics (IHEP). Yb-doped fiber amplifier (YDFA) was employed to suppress relative intensity noise (RIN) reference laser. And root-mean-square (RMS) integrated RIN reduced from 7.78 × 10 -4 before suppression 6 -5 after in interval 1 Hz MHz. The performance this demonstrated a mode-locked laser with...
Rapid urbanization a major factor affecting heavy metal contamination on suburban agricultural soils. In order to assess the dynamic of metals in soil from land bordering rapidly urbanizing area and transfer human health risks contaminants this process, 186 293 samples Chengdu were collected September 2008 2017, respectively. Several indicators, such as integrated pollution index (PI) potential ecological risk (RI), employed for analyzing levels, APCS-MLR receptor model applied sources. As...
Modern low-level RF (LLRF) control systems of particle accelerators are designed to achieve extremely precise field amplitude and phase regulation inside the accelerating cavities. The signal is usually converted an intermediate frequency (IF) before being sampled by ADC. As down-conversion important procedure digital processing in LLRF system, designing a high performance broad band downconverter compatible with various important. In this paper, design based on MicroTCA its evaluation...
Abstract：A new tuner control system of spoke superconducting radio frequency (SRF) cavity has been developed and applied to cryomodule I (CM1) C-ADS injector at IHEP.We have successfully implemented the controller achieved a tuning phase error ±0.7° (peak peak) in presence electromechanical coupled resonance.This paper will present preliminary experimental results based on under proton beam commissioning.
High power radio frequency (RF) conditioning is a key step for the RF components to gain full performance. In construction of high energy photon source (HEPS), upgrading Beijing Electron-Positron Collider (BEPCII), preresearch circular electron positron collider (CEPC), and other projects at Institute Energy Physics (IHEP), there will be lot tasks within very tight schedule. To improve efficiency, an optimized automatic control has been developed. The system developed based on Experimental...
To test and verify the performance of digital low-level radio-frequency (LLRF) tuner system designed by IHEP RF group, an experimental platform with a retired KEK 1.3 GHz nine-cell cavity is set up. A (RF) field established successfully in frequency locked ±0.5° (about ±1.2 kHz) at room temperature. The LLRF performs well five-hour experiment, results show that achieves stability amplitude <0.1% (peak to peak) phase <0.1° peak). This index satisfies requirements International Linear Collider...
In recent accelerators, radio frequency (RF) is the important technology and klystron most favored RF device. Since a expensive, procurement can take year, proper maintenance work recurring theme. particular, life estimation by measuring cathode activity of for accelerator operation because after long usage klystron, deteriorates. The standard method used to measure emission current as function heater voltage (Miram plot), but it takes few hours obtain full curve characteristics tube hard...
The 10 MeV accelerator-driven subcritical system (ADS) Injector-I test stand at Institute of High Energy Physics (IHEP) is a testing facility dedicated to demonstrate one the two injector design schemes [Injector Scheme-I, which works 325 MHz], for ADS project in China. Injector adopted four vane copper structure RFQ with output energy 3.2 and superconducting (SC) section accommodating fourteen \b{eta}g=0.12 single spoke cavities, SC solenoids cold BPMs. ion source was installed since April...