Recently our team investigated the energy deposition and excitation of wakefield in case of hundreds keV proton/helium ion beams passing a gas-discharged plasma target. The plasma target was produced by igniting an el...Recently our team investigated the energy deposition and excitation of wakefield in case of hundreds keV proton/helium ion beams passing a gas-discharged plasma target. The plasma target was produced by igniting an electric discharge of hydrogen gas in two-collinear quartz tubes, each of 5 mm in diameter and 78 mm in length, the electrical current even up to kA will flow in two opposite directions in either of the two quartz tubes.展开更多
X-ray emission analysis provides us an effective method to investigate the inner-shell process of ion-atom collisions.Near the Bohr velocity, the projectile, having enough kinetic energy, interacts with the target ato...X-ray emission analysis provides us an effective method to investigate the inner-shell process of ion-atom collisions.Near the Bohr velocity, the projectile, having enough kinetic energy, interacts with the target atoms at a closedistance below the surface. Except for neutralization, it may be ionized. Not only the inner-shell ionization, butalso the outer-shell may be multiple ionized. This results in the X-ray energy shift and the change of fluorescenceyield[1??3]. Here, we would like to present the evolvement of the Ar11+ ions in collisions near the Bohr velocity.展开更多
Graphene is two dimensional materials which is made of honeycombed carbon atoms. It attracts extensiveinterests for its wonderful characteristics that make the graphene a potential candidate in fields of microelectron...Graphene is two dimensional materials which is made of honeycombed carbon atoms. It attracts extensiveinterests for its wonderful characteristics that make the graphene a potential candidate in fields of microelectronicsproduction, molecule detection, desalination and DNA sequencing. Highly charged ion (HCI) has huge potentialenergy for peeling off electrons. When interacting with solid surface, the HCI distorted the solid lattice via potentialdeposition and then the nanostructures were formed on the solid surface. The HCI was expected as a tool for surfacemodification. In this work, HOPG and grapheme were irradiated with Xeq+ and Arq+ ions. The typical Ramanspectra of graphene and HOPG irradiated with highly charged ions were shown in Fig. 1. The D peak appeared at1 335 cm??1 on the spectra of graphene irradiated with highly charged ions. The intensity of D peak increased withfluence. The ratio of intensity of D peak to that of G peak varied with fluence in Fig. 2. The ratio rose linearlywith the square root of fluence when fluence was low. The ratio saturated when the irradiation fluence was high.The critical fluence depended on the charge state of ion. The higher charge state it was, the lower critical fluenceit would be.展开更多
The interaction process of ions and plasmas is an important topic in Ion-Beam-Driven High Energy DensityPhysics and Inertial Confinement Fusion research. Due to the strong non-linear effects and the special importance...The interaction process of ions and plasmas is an important topic in Ion-Beam-Driven High Energy DensityPhysics and Inertial Confinement Fusion research. Due to the strong non-linear effects and the special importancein ICF research, more and more emphasis has been given to the investigations for ion beam in low energy rangeand/or for plasma with high intensity[1;2]. Here, we address the newly measured results of the energy loss by slowions penetrating the fully ionized hydrogen plasma target.展开更多
Temperature is one of the key thermodynamic parameters of HED matter. As a popular technique, the pyrometerof narrow-band lters together with photodiodes (namely multi-channel pyrometer) has been applied. However, the...Temperature is one of the key thermodynamic parameters of HED matter. As a popular technique, the pyrometerof narrow-band lters together with photodiodes (namely multi-channel pyrometer) has been applied. However, thepyrometer can only measure one-position temperature in single shot [1;2]. Actually, it is very important to knowtemperature evolution of multiple positions in single shot, especially for the target induced by heavy ion beam, wherea large volume of HED matter can be generated. Consequently, a fast new-type pyrometer has been designed.展开更多
Highly charged ions (HCIs) carrying amount of potential energy will produce some new physical phenomenabecause the potential energy will be deposited into a very small volume within a very short time. We wouldapply th...Highly charged ions (HCIs) carrying amount of potential energy will produce some new physical phenomenabecause the potential energy will be deposited into a very small volume within a very short time. We wouldapply the calorimetric method to study the energy deposition of HCIs [1;2]. Herein we introduce the new setup forcalorimetric measurement for the potential energy deposition of highly charged ions at 320 kV Highly Charged IonsPhysics Experimental Platform.The setup was constructed by 3 parts: the Dewar, the electrical temperature controller and the main part. Thediamond target was connected to the LN2 cooled heat sink by 4 copper wires and a Platinum temperature sensorwas glued to the rear side of the target. As shown in Fig. 1.展开更多
文摘Recently our team investigated the energy deposition and excitation of wakefield in case of hundreds keV proton/helium ion beams passing a gas-discharged plasma target. The plasma target was produced by igniting an electric discharge of hydrogen gas in two-collinear quartz tubes, each of 5 mm in diameter and 78 mm in length, the electrical current even up to kA will flow in two opposite directions in either of the two quartz tubes.
文摘X-ray emission analysis provides us an effective method to investigate the inner-shell process of ion-atom collisions.Near the Bohr velocity, the projectile, having enough kinetic energy, interacts with the target atoms at a closedistance below the surface. Except for neutralization, it may be ionized. Not only the inner-shell ionization, butalso the outer-shell may be multiple ionized. This results in the X-ray energy shift and the change of fluorescenceyield[1??3]. Here, we would like to present the evolvement of the Ar11+ ions in collisions near the Bohr velocity.
基金National Natural Science Foundation of China (11105192, 11075192, 11275241, 11275238, 11205225, 11075125).
文摘Graphene is two dimensional materials which is made of honeycombed carbon atoms. It attracts extensiveinterests for its wonderful characteristics that make the graphene a potential candidate in fields of microelectronicsproduction, molecule detection, desalination and DNA sequencing. Highly charged ion (HCI) has huge potentialenergy for peeling off electrons. When interacting with solid surface, the HCI distorted the solid lattice via potentialdeposition and then the nanostructures were formed on the solid surface. The HCI was expected as a tool for surfacemodification. In this work, HOPG and grapheme were irradiated with Xeq+ and Arq+ ions. The typical Ramanspectra of graphene and HOPG irradiated with highly charged ions were shown in Fig. 1. The D peak appeared at1 335 cm??1 on the spectra of graphene irradiated with highly charged ions. The intensity of D peak increased withfluence. The ratio of intensity of D peak to that of G peak varied with fluence in Fig. 2. The ratio rose linearlywith the square root of fluence when fluence was low. The ratio saturated when the irradiation fluence was high.The critical fluence depended on the charge state of ion. The higher charge state it was, the lower critical fluenceit would be.
基金National Natural Science Foundation of China (11105192, 11275241, 11275238, 11205225)
文摘The interaction process of ions and plasmas is an important topic in Ion-Beam-Driven High Energy DensityPhysics and Inertial Confinement Fusion research. Due to the strong non-linear effects and the special importancein ICF research, more and more emphasis has been given to the investigations for ion beam in low energy rangeand/or for plasma with high intensity[1;2]. Here, we address the newly measured results of the energy loss by slowions penetrating the fully ionized hydrogen plasma target.
文摘Temperature is one of the key thermodynamic parameters of HED matter. As a popular technique, the pyrometerof narrow-band lters together with photodiodes (namely multi-channel pyrometer) has been applied. However, thepyrometer can only measure one-position temperature in single shot [1;2]. Actually, it is very important to knowtemperature evolution of multiple positions in single shot, especially for the target induced by heavy ion beam, wherea large volume of HED matter can be generated. Consequently, a fast new-type pyrometer has been designed.
基金National Natural Science Foundation of China (11105192, 11075192, 11275241, 11275238, 11205225, 11075125).
文摘Highly charged ions (HCIs) carrying amount of potential energy will produce some new physical phenomenabecause the potential energy will be deposited into a very small volume within a very short time. We wouldapply the calorimetric method to study the energy deposition of HCIs [1;2]. Herein we introduce the new setup forcalorimetric measurement for the potential energy deposition of highly charged ions at 320 kV Highly Charged IonsPhysics Experimental Platform.The setup was constructed by 3 parts: the Dewar, the electrical temperature controller and the main part. Thediamond target was connected to the LN2 cooled heat sink by 4 copper wires and a Platinum temperature sensorwas glued to the rear side of the target. As shown in Fig. 1.
