The Experts below are selected from a list of 13206 Experts worldwide ranked by ideXlab platform

Yongchun Feng - One of the best experts on this subject based on the ideXlab platform.

  • Electron Beam Probe: The analysis of the Electron Beam spot expansion and a prototype development at IMP
    Nuclear Instruments and Methods in Physics Research Section A: Accelerators Spectrometers Detectors and Associated Equipment, 2020
    Co-Authors: Yongchun Feng, Yan Yin, Tong Liu, Yaoyao You, Yucong Chen, Ruishi Mao, Jiajian Ding, Kai Tang, Xincai Kang
    Abstract:

    Abstract Non-interceptive diagnostic techniques are essential for high Beam power accelerators. An Electron Beam Probe (EBP) is preferable to measure the Beam distribution of a dense Beam bunch in which a low-intensity and low-energy Electron Beam sweeps across the ion Beam and the deflection angle exerted on each Electron by the space charge field of ion Beam reflecting the local density distribution of the ion Beam. In this paper, the design and setup of an EBP system, together with preliminary Beam experiment result, are presented. A dedicated multi-particle simulation algorithm is developed which reproduces the expansion effect of Electron Beam spot in a dense ion bunch as observed by several Labs, and a theoretical interpretation is given with a preliminary solution being proposed. In the future, an improved version of EBP will supply non-interceptive diagnostics for Booster Ring (BRing) of the High Intensity heavy ion Accelerator Facility (HIAF), of which a fast scanning system will be implemented with the parallel Electron Beam optics configured.

  • Beam distribution reconstruction simulation for Electron Beam Probe
    Chinese Physics C, 2017
    Co-Authors: Yongchun Feng, R S Mao, Xincai Kang, Yan Yin, Tong Liu, Yaoyao You, Yucong Chen, T C Zhao, Yanyu Wang, Youjin Yuan
    Abstract:

    An Electron Beam Probe (EBP) is a detector which makes use of a low-intensity and low-energy Electron Beam to measure the transverse profile, bunch shape, Beam neutralization and Beam wake field of an intense Beam with small dimensions. While it can be applied to many aspects, we limit our analysis to Beam distribution reconstruction. This kind of detector is almost non-interceptive for all of the Beam and does not disturb the machine environment. In this paper, we present the theoretical aspects behind this technique for Beam distribution measurement and some simulation results of the detector involved. First, a method to obtain a parallel Electron Beam is introduced and a simulation code is developed. An EBP as a profile monitor for dense Beams is then simulated using the fast scan method for various target Beam profiles, including KV distribution, waterbag distribution, parabolic distribution, Gaussian distribution and halo distribution. Profile reconstruction from the deflected Electron Beam trajectory is implemented and compared with the actual profile, and the expected agreement is achieved. Furthermore, as well as fast scan, a slow scan, i.e. step-by-step scan, is considered, which lowers the requirement for hardware, i.e. Radio Frequency deflector. We calculate the three-dimensional electric field of a Gaussian distribution and simulate the Electron motion in this field. In addition, a fast scan along the target Beam direction and slow scan across the Beam are also presented, and can provide a measurement of longitudinal distribution as well as transverse profile simultaneously. As an example, simulation results for the China Accelerator Driven Sub-critical System (CADS) and High Intensity Heavy Ion Accelerator Facility (HIAF) are given. Finally, a potential system design for an EBP is described.

  • Beam distribution reconstruction simulation for Electron Beam Probe
    arXiv: Accelerator Physics, 2016
    Co-Authors: Yongchun Feng, R S Mao, Xincai Kang, Yan Yin, Tong Liu, Yaoyao You, Yucong Chen, T C Zhao, Yanyu Wang, Youjin Yuan
    Abstract:

    Electron Beam Probe (EBP) is a new principle detector, which makes use of a low-intensity and low-energy Electron Beam to measure the transverse profile, bunch shape, Beam neutralization and Beam wake field of an intense Beam with small dimensions. While can be applied to many aspects, we limit our analysis to Beam distribution reconstruction. This kind of detector is almost non-interceptive for all of the Beam and does not disturb the machine environment. In this paper, we present the theoretical aspects behind this technique for Beam distribution measurement and some simulation results of the detector involved. First, a method to obtain parallel Electron Beam is introduced and a simulation code is developed. And then, EBP as a profile monitor for dense Beam is simulated using fast scan method under various target Beam profile, such as KV distribution, waterbag distribution, parabolic distribution, Gaussian distribution and halo distribution. Profile reconstruction from the deflected Electron Beam trajectory is implemented and compared with the actual one, and an expected agreement is achieved. Furthermore, Instead of fast scan, a slow scan, i.e. step-by-step scan, is considered, which lows the requirement for hardware, i.e. Radio Frequency deflector. we calculate the three dimensional electric field of Gaussian distribution and simulate the Electron motion under this field. In addition, fast scan along the target Beam direction and slow scan across the Beam is also presented, and can provide a measurement of longitudinal distribution as well as transverse profile simultaneously. Final, simulation results for China Accelerator Driven Sub-critical System (CADS) and High Intensity Heavy Ion Accelerator Facility (HIAF) are given to investigate the quantitative behavior of EBP.

Youjin Yuan - One of the best experts on this subject based on the ideXlab platform.

  • Beam distribution reconstruction simulation for Electron Beam Probe
    Chinese Physics C, 2017
    Co-Authors: Yongchun Feng, R S Mao, Xincai Kang, Yan Yin, Tong Liu, Yaoyao You, Yucong Chen, T C Zhao, Yanyu Wang, Youjin Yuan
    Abstract:

    An Electron Beam Probe (EBP) is a detector which makes use of a low-intensity and low-energy Electron Beam to measure the transverse profile, bunch shape, Beam neutralization and Beam wake field of an intense Beam with small dimensions. While it can be applied to many aspects, we limit our analysis to Beam distribution reconstruction. This kind of detector is almost non-interceptive for all of the Beam and does not disturb the machine environment. In this paper, we present the theoretical aspects behind this technique for Beam distribution measurement and some simulation results of the detector involved. First, a method to obtain a parallel Electron Beam is introduced and a simulation code is developed. An EBP as a profile monitor for dense Beams is then simulated using the fast scan method for various target Beam profiles, including KV distribution, waterbag distribution, parabolic distribution, Gaussian distribution and halo distribution. Profile reconstruction from the deflected Electron Beam trajectory is implemented and compared with the actual profile, and the expected agreement is achieved. Furthermore, as well as fast scan, a slow scan, i.e. step-by-step scan, is considered, which lowers the requirement for hardware, i.e. Radio Frequency deflector. We calculate the three-dimensional electric field of a Gaussian distribution and simulate the Electron motion in this field. In addition, a fast scan along the target Beam direction and slow scan across the Beam are also presented, and can provide a measurement of longitudinal distribution as well as transverse profile simultaneously. As an example, simulation results for the China Accelerator Driven Sub-critical System (CADS) and High Intensity Heavy Ion Accelerator Facility (HIAF) are given. Finally, a potential system design for an EBP is described.

  • Beam distribution reconstruction simulation for Electron Beam Probe
    arXiv: Accelerator Physics, 2016
    Co-Authors: Yongchun Feng, R S Mao, Xincai Kang, Yan Yin, Tong Liu, Yaoyao You, Yucong Chen, T C Zhao, Yanyu Wang, Youjin Yuan
    Abstract:

    Electron Beam Probe (EBP) is a new principle detector, which makes use of a low-intensity and low-energy Electron Beam to measure the transverse profile, bunch shape, Beam neutralization and Beam wake field of an intense Beam with small dimensions. While can be applied to many aspects, we limit our analysis to Beam distribution reconstruction. This kind of detector is almost non-interceptive for all of the Beam and does not disturb the machine environment. In this paper, we present the theoretical aspects behind this technique for Beam distribution measurement and some simulation results of the detector involved. First, a method to obtain parallel Electron Beam is introduced and a simulation code is developed. And then, EBP as a profile monitor for dense Beam is simulated using fast scan method under various target Beam profile, such as KV distribution, waterbag distribution, parabolic distribution, Gaussian distribution and halo distribution. Profile reconstruction from the deflected Electron Beam trajectory is implemented and compared with the actual one, and an expected agreement is achieved. Furthermore, Instead of fast scan, a slow scan, i.e. step-by-step scan, is considered, which lows the requirement for hardware, i.e. Radio Frequency deflector. we calculate the three dimensional electric field of Gaussian distribution and simulate the Electron motion under this field. In addition, fast scan along the target Beam direction and slow scan across the Beam is also presented, and can provide a measurement of longitudinal distribution as well as transverse profile simultaneously. Final, simulation results for China Accelerator Driven Sub-critical System (CADS) and High Intensity Heavy Ion Accelerator Facility (HIAF) are given to investigate the quantitative behavior of EBP.

Xincai Kang - One of the best experts on this subject based on the ideXlab platform.

  • Electron Beam Probe: The analysis of the Electron Beam spot expansion and a prototype development at IMP
    Nuclear Instruments and Methods in Physics Research Section A: Accelerators Spectrometers Detectors and Associated Equipment, 2020
    Co-Authors: Yongchun Feng, Yan Yin, Tong Liu, Yaoyao You, Yucong Chen, Ruishi Mao, Jiajian Ding, Kai Tang, Xincai Kang
    Abstract:

    Abstract Non-interceptive diagnostic techniques are essential for high Beam power accelerators. An Electron Beam Probe (EBP) is preferable to measure the Beam distribution of a dense Beam bunch in which a low-intensity and low-energy Electron Beam sweeps across the ion Beam and the deflection angle exerted on each Electron by the space charge field of ion Beam reflecting the local density distribution of the ion Beam. In this paper, the design and setup of an EBP system, together with preliminary Beam experiment result, are presented. A dedicated multi-particle simulation algorithm is developed which reproduces the expansion effect of Electron Beam spot in a dense ion bunch as observed by several Labs, and a theoretical interpretation is given with a preliminary solution being proposed. In the future, an improved version of EBP will supply non-interceptive diagnostics for Booster Ring (BRing) of the High Intensity heavy ion Accelerator Facility (HIAF), of which a fast scanning system will be implemented with the parallel Electron Beam optics configured.

  • Beam distribution reconstruction simulation for Electron Beam Probe
    Chinese Physics C, 2017
    Co-Authors: Yongchun Feng, R S Mao, Xincai Kang, Yan Yin, Tong Liu, Yaoyao You, Yucong Chen, T C Zhao, Yanyu Wang, Youjin Yuan
    Abstract:

    An Electron Beam Probe (EBP) is a detector which makes use of a low-intensity and low-energy Electron Beam to measure the transverse profile, bunch shape, Beam neutralization and Beam wake field of an intense Beam with small dimensions. While it can be applied to many aspects, we limit our analysis to Beam distribution reconstruction. This kind of detector is almost non-interceptive for all of the Beam and does not disturb the machine environment. In this paper, we present the theoretical aspects behind this technique for Beam distribution measurement and some simulation results of the detector involved. First, a method to obtain a parallel Electron Beam is introduced and a simulation code is developed. An EBP as a profile monitor for dense Beams is then simulated using the fast scan method for various target Beam profiles, including KV distribution, waterbag distribution, parabolic distribution, Gaussian distribution and halo distribution. Profile reconstruction from the deflected Electron Beam trajectory is implemented and compared with the actual profile, and the expected agreement is achieved. Furthermore, as well as fast scan, a slow scan, i.e. step-by-step scan, is considered, which lowers the requirement for hardware, i.e. Radio Frequency deflector. We calculate the three-dimensional electric field of a Gaussian distribution and simulate the Electron motion in this field. In addition, a fast scan along the target Beam direction and slow scan across the Beam are also presented, and can provide a measurement of longitudinal distribution as well as transverse profile simultaneously. As an example, simulation results for the China Accelerator Driven Sub-critical System (CADS) and High Intensity Heavy Ion Accelerator Facility (HIAF) are given. Finally, a potential system design for an EBP is described.

  • Beam distribution reconstruction simulation for Electron Beam Probe
    arXiv: Accelerator Physics, 2016
    Co-Authors: Yongchun Feng, R S Mao, Xincai Kang, Yan Yin, Tong Liu, Yaoyao You, Yucong Chen, T C Zhao, Yanyu Wang, Youjin Yuan
    Abstract:

    Electron Beam Probe (EBP) is a new principle detector, which makes use of a low-intensity and low-energy Electron Beam to measure the transverse profile, bunch shape, Beam neutralization and Beam wake field of an intense Beam with small dimensions. While can be applied to many aspects, we limit our analysis to Beam distribution reconstruction. This kind of detector is almost non-interceptive for all of the Beam and does not disturb the machine environment. In this paper, we present the theoretical aspects behind this technique for Beam distribution measurement and some simulation results of the detector involved. First, a method to obtain parallel Electron Beam is introduced and a simulation code is developed. And then, EBP as a profile monitor for dense Beam is simulated using fast scan method under various target Beam profile, such as KV distribution, waterbag distribution, parabolic distribution, Gaussian distribution and halo distribution. Profile reconstruction from the deflected Electron Beam trajectory is implemented and compared with the actual one, and an expected agreement is achieved. Furthermore, Instead of fast scan, a slow scan, i.e. step-by-step scan, is considered, which lows the requirement for hardware, i.e. Radio Frequency deflector. we calculate the three dimensional electric field of Gaussian distribution and simulate the Electron motion under this field. In addition, fast scan along the target Beam direction and slow scan across the Beam is also presented, and can provide a measurement of longitudinal distribution as well as transverse profile simultaneously. Final, simulation results for China Accelerator Driven Sub-critical System (CADS) and High Intensity Heavy Ion Accelerator Facility (HIAF) are given to investigate the quantitative behavior of EBP.

D A Payne - One of the best experts on this subject based on the ideXlab platform.

  • determination of fluctuations in local symmetry and measurement by convergent Beam Electron diffraction applications to a relaxor based ferroelectric crystal after thermal annealing
    Journal of Applied Crystallography, 2013
    Co-Authors: D A Payne
    Abstract:

    Single crystals of Pb(Mg1/3Nb2/3)O3–31%PbTiO3 (PMN–31%PT) are known for their complex domain structures at the nanometre scale. While their average symmetry has been studied by X-ray, neutron and Electron diffraction methods, there is little knowledge about variations in symmetry at the local scale. Here, direct evidence is provided for the volume dependence and spatial dependence of symmetry fluctuations by using quantitative convergent Beam Electron diffraction and energy dispersive X-ray spectroscopy. Fluctuations in symmetry were determined by using different Electron Beam Probe sizes ranging from ∼2 to 25 nm from a crystal ∼62 nm thick. The symmetry of PMN–31%PT was found to increase linearly as the average volume increased, and the local symmetry fluctuated from one location to another at the nanoscale. Energy dispersive X-ray spectroscopy indicates that chemical fluctuations are significant when the Probe size decreases to ∼2 nm. The symmetry fluctuation is attributed to locally varying composition-dependent ionic displacements and spontaneous polarization.

Yan Yin - One of the best experts on this subject based on the ideXlab platform.

  • Electron Beam Probe: The analysis of the Electron Beam spot expansion and a prototype development at IMP
    Nuclear Instruments and Methods in Physics Research Section A: Accelerators Spectrometers Detectors and Associated Equipment, 2020
    Co-Authors: Yongchun Feng, Yan Yin, Tong Liu, Yaoyao You, Yucong Chen, Ruishi Mao, Jiajian Ding, Kai Tang, Xincai Kang
    Abstract:

    Abstract Non-interceptive diagnostic techniques are essential for high Beam power accelerators. An Electron Beam Probe (EBP) is preferable to measure the Beam distribution of a dense Beam bunch in which a low-intensity and low-energy Electron Beam sweeps across the ion Beam and the deflection angle exerted on each Electron by the space charge field of ion Beam reflecting the local density distribution of the ion Beam. In this paper, the design and setup of an EBP system, together with preliminary Beam experiment result, are presented. A dedicated multi-particle simulation algorithm is developed which reproduces the expansion effect of Electron Beam spot in a dense ion bunch as observed by several Labs, and a theoretical interpretation is given with a preliminary solution being proposed. In the future, an improved version of EBP will supply non-interceptive diagnostics for Booster Ring (BRing) of the High Intensity heavy ion Accelerator Facility (HIAF), of which a fast scanning system will be implemented with the parallel Electron Beam optics configured.

  • Beam distribution reconstruction simulation for Electron Beam Probe
    Chinese Physics C, 2017
    Co-Authors: Yongchun Feng, R S Mao, Xincai Kang, Yan Yin, Tong Liu, Yaoyao You, Yucong Chen, T C Zhao, Yanyu Wang, Youjin Yuan
    Abstract:

    An Electron Beam Probe (EBP) is a detector which makes use of a low-intensity and low-energy Electron Beam to measure the transverse profile, bunch shape, Beam neutralization and Beam wake field of an intense Beam with small dimensions. While it can be applied to many aspects, we limit our analysis to Beam distribution reconstruction. This kind of detector is almost non-interceptive for all of the Beam and does not disturb the machine environment. In this paper, we present the theoretical aspects behind this technique for Beam distribution measurement and some simulation results of the detector involved. First, a method to obtain a parallel Electron Beam is introduced and a simulation code is developed. An EBP as a profile monitor for dense Beams is then simulated using the fast scan method for various target Beam profiles, including KV distribution, waterbag distribution, parabolic distribution, Gaussian distribution and halo distribution. Profile reconstruction from the deflected Electron Beam trajectory is implemented and compared with the actual profile, and the expected agreement is achieved. Furthermore, as well as fast scan, a slow scan, i.e. step-by-step scan, is considered, which lowers the requirement for hardware, i.e. Radio Frequency deflector. We calculate the three-dimensional electric field of a Gaussian distribution and simulate the Electron motion in this field. In addition, a fast scan along the target Beam direction and slow scan across the Beam are also presented, and can provide a measurement of longitudinal distribution as well as transverse profile simultaneously. As an example, simulation results for the China Accelerator Driven Sub-critical System (CADS) and High Intensity Heavy Ion Accelerator Facility (HIAF) are given. Finally, a potential system design for an EBP is described.

  • Beam distribution reconstruction simulation for Electron Beam Probe
    arXiv: Accelerator Physics, 2016
    Co-Authors: Yongchun Feng, R S Mao, Xincai Kang, Yan Yin, Tong Liu, Yaoyao You, Yucong Chen, T C Zhao, Yanyu Wang, Youjin Yuan
    Abstract:

    Electron Beam Probe (EBP) is a new principle detector, which makes use of a low-intensity and low-energy Electron Beam to measure the transverse profile, bunch shape, Beam neutralization and Beam wake field of an intense Beam with small dimensions. While can be applied to many aspects, we limit our analysis to Beam distribution reconstruction. This kind of detector is almost non-interceptive for all of the Beam and does not disturb the machine environment. In this paper, we present the theoretical aspects behind this technique for Beam distribution measurement and some simulation results of the detector involved. First, a method to obtain parallel Electron Beam is introduced and a simulation code is developed. And then, EBP as a profile monitor for dense Beam is simulated using fast scan method under various target Beam profile, such as KV distribution, waterbag distribution, parabolic distribution, Gaussian distribution and halo distribution. Profile reconstruction from the deflected Electron Beam trajectory is implemented and compared with the actual one, and an expected agreement is achieved. Furthermore, Instead of fast scan, a slow scan, i.e. step-by-step scan, is considered, which lows the requirement for hardware, i.e. Radio Frequency deflector. we calculate the three dimensional electric field of Gaussian distribution and simulate the Electron motion under this field. In addition, fast scan along the target Beam direction and slow scan across the Beam is also presented, and can provide a measurement of longitudinal distribution as well as transverse profile simultaneously. Final, simulation results for China Accelerator Driven Sub-critical System (CADS) and High Intensity Heavy Ion Accelerator Facility (HIAF) are given to investigate the quantitative behavior of EBP.