At the beginning of 2013, the Institute of Modern Physics proposed to develop electron radiography technique based on high-energy and short-pulsed electron accelerator, which is applied to high energy density state/th...At the beginning of 2013, the Institute of Modern Physics proposed to develop electron radiography technique based on high-energy and short-pulsed electron accelerator, which is applied to high energy density state/thick target diagnostics[1]. A low energy beam transport system (LEBT) was designed to matching the transmission between the gun and the LINAC.展开更多
High Energy Electron Radiography (HEER) is a new method suitable for High Energy Density Physics (HEDP) research that uses a high energy electron beam as a probe for time resolved imaging measurements of high energy d...High Energy Electron Radiography (HEER) is a new method suitable for High Energy Density Physics (HEDP) research that uses a high energy electron beam as a probe for time resolved imaging measurements of high energy density processes in materials[1]. A high energy electron imaging research platform based on a 100 MeV Electron Linac (e-Linac) which was designed for experimental research of HEER has been proposed by Electron Accelerator Group in IMP. This e-Linac has two injection beam lines. One is a thermionic RF gun with Alpha magnet and quadrupole magnets, and the other is a photo-cathode RF gun with emittance compensation solenoid(Fig. 1), and parameters details is shown in Table 1. The experimental terminals of this e-linac have been designed for HEER and the Thick Target X-ray imaging.展开更多
High Energy Density Physics (HEDP) aims to study the properties of matter under extreme states of temperatureand pressure. The pressure in a high energy density sample exceeds 1 Mbar (100 GPa), thus the hydrodynamicre...High Energy Density Physics (HEDP) aims to study the properties of matter under extreme states of temperatureand pressure. The pressure in a high energy density sample exceeds 1 Mbar (100 GPa), thus the hydrodynamicresponse of the sample is a high expansion velocity in the range of km/s (m/ns). Therefore, diagnostics which arecapable of high time resolution (< ns) and space resolution (10 m) are needed. High Energy Electron Radiography(HEER) is a new method suitable for HEDP research that uses a high energy electron beam as a probe for timeresolved imaging measurements of high energy density processes in materials. The device uses an electron bunchtrain with a flexible time structure penetrating a time varying high density target. The electron bunch-lets, eacha few ps long and with charges nC is suitable, traverses the HEDP target where the electrons are scattered bythe nuclei. The angular distribution depends on the density and thickness of the target. The scattered electronsthen travel through the point-to-point imaging lattice with a suitable magnification. A small aperture is used tocollimate the scattered electron beam for off axis particles and bremsstrahlung photons, and the target image willbe detected by a luminescent screen located after the imaging lattice, as shown in the Fig. 1.展开更多
In 2019,after the institutional adjustment,the main task of electron accelerator group mainly covers the following fields:electron linac and high energy electron radiography,electrostatic accelerator technology,low en...In 2019,after the institutional adjustment,the main task of electron accelerator group mainly covers the following fields:electron linac and high energy electron radiography,electrostatic accelerator technology,low energy accelerator and their applications.展开更多
In the year 2018,our group mainly focused on two fields of studies.The first important work is High Energy Electron Radiography(HEER)research.Especially we focused on the Lanzhou HEER experimental platform setup.Anoth...In the year 2018,our group mainly focused on two fields of studies.The first important work is High Energy Electron Radiography(HEER)research.Especially we focused on the Lanzhou HEER experimental platform setup.Another one is the investigation on the high average current electron injector for Phase II of HIAF project and some pre-research schemes are planned.展开更多
High Energy Electron Radiography(HEER)is a new method suitable for High Energy Density Physics(HEDP)research that uses a high energy electron beam as a probe for time resolved imaging measurements of high energy densi...High Energy Electron Radiography(HEER)is a new method suitable for High Energy Density Physics(HEDP)research that uses a high energy electron beam as a probe for time resolved imaging measurements of high energy density processes in materials[1].A High Energy Electron Radiography Research Platform(HEERRP)based on a 50 MeV Electron Linac(e-Lianc)which was designed for experimental research of HEER has been proposed by Electron Accelerator Group in IMP.This e-Linac has two injection beam lines,one is a thermionic RF gun with Alpha Magnet and Quadrupole magnets,and the other is a photo-cathode RF gun with emittance compensation Solenoid,see the Fig.1,and parameters details see the Table 1.展开更多
Continuous silicon carbide fiber reinforced silicon carbide(SiCf/SiC)composites have been considered to be candidate materials of high temperature structural application in aerospace,energy conservation and power gene...Continuous silicon carbide fiber reinforced silicon carbide(SiCf/SiC)composites have been considered to be candidate materials of high temperature structural application in aerospace,energy conservation and power generation due to the excellent high temperature mechanical properties,good fracture resistance,corrosion resistance and thermodynamic stability.Furthermore,due to the high thermal stability,low induced radioactivity,quick decay of activity and low afterheat,SiCf/SiC composites have been recognized as the promising materials of fission and future fusion reactors.SiCf/SiC composites are composed of SiC fiber and SiC marix materials.Radiation resistance,oxidation tolerance,fracture toughness and tensile strength of SiC fiber have a direct impact on the SiCf/SiC composites performance.展开更多
文摘At the beginning of 2013, the Institute of Modern Physics proposed to develop electron radiography technique based on high-energy and short-pulsed electron accelerator, which is applied to high energy density state/thick target diagnostics[1]. A low energy beam transport system (LEBT) was designed to matching the transmission between the gun and the LINAC.
文摘High Energy Electron Radiography (HEER) is a new method suitable for High Energy Density Physics (HEDP) research that uses a high energy electron beam as a probe for time resolved imaging measurements of high energy density processes in materials[1]. A high energy electron imaging research platform based on a 100 MeV Electron Linac (e-Linac) which was designed for experimental research of HEER has been proposed by Electron Accelerator Group in IMP. This e-Linac has two injection beam lines. One is a thermionic RF gun with Alpha magnet and quadrupole magnets, and the other is a photo-cathode RF gun with emittance compensation solenoid(Fig. 1), and parameters details is shown in Table 1. The experimental terminals of this e-linac have been designed for HEER and the Thick Target X-ray imaging.
文摘High Energy Density Physics (HEDP) aims to study the properties of matter under extreme states of temperatureand pressure. The pressure in a high energy density sample exceeds 1 Mbar (100 GPa), thus the hydrodynamicresponse of the sample is a high expansion velocity in the range of km/s (m/ns). Therefore, diagnostics which arecapable of high time resolution (< ns) and space resolution (10 m) are needed. High Energy Electron Radiography(HEER) is a new method suitable for HEDP research that uses a high energy electron beam as a probe for timeresolved imaging measurements of high energy density processes in materials. The device uses an electron bunchtrain with a flexible time structure penetrating a time varying high density target. The electron bunch-lets, eacha few ps long and with charges nC is suitable, traverses the HEDP target where the electrons are scattered bythe nuclei. The angular distribution depends on the density and thickness of the target. The scattered electronsthen travel through the point-to-point imaging lattice with a suitable magnification. A small aperture is used tocollimate the scattered electron beam for off axis particles and bremsstrahlung photons, and the target image willbe detected by a luminescent screen located after the imaging lattice, as shown in the Fig. 1.
文摘In 2019,after the institutional adjustment,the main task of electron accelerator group mainly covers the following fields:electron linac and high energy electron radiography,electrostatic accelerator technology,low energy accelerator and their applications.
基金National Natural Science Foundation of China(11435015,11505251)International S&T Cooperation Program of China(2016YFE0104900)。
文摘In the year 2018,our group mainly focused on two fields of studies.The first important work is High Energy Electron Radiography(HEER)research.Especially we focused on the Lanzhou HEER experimental platform setup.Another one is the investigation on the high average current electron injector for Phase II of HIAF project and some pre-research schemes are planned.
文摘High Energy Electron Radiography(HEER)is a new method suitable for High Energy Density Physics(HEDP)research that uses a high energy electron beam as a probe for time resolved imaging measurements of high energy density processes in materials[1].A High Energy Electron Radiography Research Platform(HEERRP)based on a 50 MeV Electron Linac(e-Lianc)which was designed for experimental research of HEER has been proposed by Electron Accelerator Group in IMP.This e-Linac has two injection beam lines,one is a thermionic RF gun with Alpha Magnet and Quadrupole magnets,and the other is a photo-cathode RF gun with emittance compensation Solenoid,see the Fig.1,and parameters details see the Table 1.
基金National Natural Science Foundation of China(11675231,91426304,11105191)and National Magnetic confinement Fusion Progiam(2011GB108003).
文摘Continuous silicon carbide fiber reinforced silicon carbide(SiCf/SiC)composites have been considered to be candidate materials of high temperature structural application in aerospace,energy conservation and power generation due to the excellent high temperature mechanical properties,good fracture resistance,corrosion resistance and thermodynamic stability.Furthermore,due to the high thermal stability,low induced radioactivity,quick decay of activity and low afterheat,SiCf/SiC composites have been recognized as the promising materials of fission and future fusion reactors.SiCf/SiC composites are composed of SiC fiber and SiC marix materials.Radiation resistance,oxidation tolerance,fracture toughness and tensile strength of SiC fiber have a direct impact on the SiCf/SiC composites performance.
