A5081212143- Particle accelerators and beam dynamics
- Particle Accelerators and Free-Electron Lasers
- Superconducting Materials and Applications
- Nuclear Physics and Applications
- Magnetic confinement fusion research
- Gyrotron and Vacuum Electronics Research
- Radiation Therapy and Dosimetry
- Radiation Detection and Scintillator Technologies
- Plasma Diagnostics and Applications
- Particle Detector Development and Performance
- Non-Destructive Testing Techniques
- Advanced X-ray Imaging Techniques
- Spacecraft and Cryogenic Technologies
- Photocathodes and Microchannel Plates
- Electromagnetic Compatibility and Noise Suppression
- Advanced Measurement and Detection Methods
- Electrostatic Discharge in Electronics
- Optical measurement and interference techniques
- Advanced Thermodynamic Systems and Engines
- Orbital Angular Momentum in Optics
- Embedded Systems and FPGA Design
- Muon and positron interactions and applications
- Advanced Radiotherapy Techniques
- Advanced Optical Sensing Technologies
- Optical Systems and Laser Technology
Institute of High Energy Physics
2009-2024
Chinese Academy of Sciences
2008-2024
China Spallation Neutron Source
2015-2021
Xi'an Jiaotong University
1996
Abstract A button and stripline beam position monitor (BPM) were designed developed to achieve sub-micron orbit stability in the High Energy Photon Source (HEPS). Analytical formulae CST electromagnetic simulation software used calculate radio frequency characteristics of BPM. The BPM design procedure was according HEPS requirements. characteristic impedances be 50 Ω confirmed by measurements. sensitivity, resolution, capacitance, wakefield impedance calculated. measurement results that satisfied
A new H− ion source has been installed successfully and will be used to serve the China Spallation Neutron Source (CSNS). In this paper, we report various components of source, including discharge chamber, temperature, cooling system, extraction electrodes, analyzing magnet, remote control system so on. Compared previous experimental some improvements have made make more compact convenient. present arrangement, Penning field is generated by a pair pole tip extensions on 90° magnet instead...
Precise measurement of betatron tune is required for good operating condition CSNS RCS. The fractional part important and it can be measured by analyzing the signals beam position from appointed BPM. Usually these are contaminated during acquisition process, therefore several power spectrum methods used to improve frequency resolution. In this article classical modern used. order compare their performance, results simulation data IQT J-PARC RCS discussed. It shown that estimation has better...
Space-charge forces acting in mismatched beams have been identified as a major cause of beam halo. In this paper, we describe the halo experimental results FODO line at IHEP. With transport line, experiments are carried out to compare measured data with multi-particle simulations and study formation The maximum amplitudes matched profiles agree well simulations. Details experiment presented.
In this paper, we report the design and simulation of a wire scanner for linac CSNS (China Spallation Neutron Source). The is used to measure transverse beam profile emittance. effect energy change upon mechanical must be considered. results heat on two specified wires, tungsten carbon, by using finite element method software, ANSYS, are presented. addition, deformation measurement qualitatively analyzed, signal level discussed.
The Penning surface plasma source is adopted as the China Spallation Neutron Source (CSNS) H− ion source. designed energy and beam current of are 50 keV 20 mA, respectively, with a normalized root mean square (norm. rms.) emittance 0.2 πmm·mrad. construction test stand has been completed, commissioning in progress. Stable beams up to mA attained. Emittance measurement for being prepared.
The beam position is the most important reference basis for operation of synchrotron radiation light sources, particularly commissioning first-turn injection fourth-generation sources. To improve accuracy measurement, we analyzed methods calculating position, and a finite element calculation stretched wire calibration system were used to demonstrate procedure. We proved relationship between coverage range, fitting order, scanning step size, both theoretically experimentally, which can...
A double-slit type monitor will be used in the emittance measurements at exit of first tank drift tube linac China Spallation Neutron Source where H− ion energy is 21.67 MeV. The rapid deposition slit may generate a temperature rise and high thermal stress, which damage plate. This article presents detailed thermo-mechanical studies for by Monte Carlo program finite element analysis. existence Bragg peak stopping power introduces spike stress plate, both values reach quasi-steady-state after...
Design and construction of the first prototype ionization chamber for CSNS Proton Accelerator (PA) beam loss monitor (131,M) system is reported. The low leakage current (<0.1 pA), good plateau (approximate to 800 V) linearity range. up 200 Roentgen/h are obtained in First prototype. All these give us experience further improving construction.
For CSNS RCS tune measurement, value is measured by exciting the bunch with a strip-line kicker fed white noise and using FFT algorithm. This article simulates in efficiency of discussed Matlab environment. The parameters an arc electrode structure such as VSWR, wake impedance, thermal state are analyzed based on advantages this design.