A foil–microchannel plate(MCP)detector,which uses electrostatic lenses and possesses both good position and timing resolutions,has been designed and simulated for beam diagnostics and mass measurements at the next-ge...A foil–microchannel plate(MCP)detector,which uses electrostatic lenses and possesses both good position and timing resolutions,has been designed and simulated for beam diagnostics and mass measurements at the next-generation heavy-ion-beam facility HIAF in China.Characterized by low energy loss and good performances of timing and position measurements,it would be located at focal planes in fragment separator HFRS for position monitoring,beam turning,Bq measurement,and trajectory reconstruction.Moreover,it will benefit the building-up of a magnetic-rigidity–energy-loss–time-offlight(BqDETOF)method at HFRS for high-precision in-flight particle identification of radioactive isotope beams on an event-by-event basis.Most importantly,the detector can be utilized for in-ring TOF and position measurements,beam-line TOF measurements at two achromatic foci,and position measurements at a dispersive focus of HFRS,thus making it possible to use two complementary mass measurement methods[isochronous mass spectrometry at the storage ring SRing and magnetic-rigidity–time-of-flight(BqTOF)at the beam-line HFRS]in one single experimental run.展开更多
The research activities on warm dense matter driven by intense heavy ion beams at the new project High Intensity heavy-ion AcceleratorFacility (HIAF) are presented. The ion beam parameters and the simulated accessible...The research activities on warm dense matter driven by intense heavy ion beams at the new project High Intensity heavy-ion AcceleratorFacility (HIAF) are presented. The ion beam parameters and the simulated accessible state of matter at HIAF are introduced, respectively. Theprogresses of the developed diagnostics for warm dense matter research including high energy electron radiography, multiple-channel pyrometer,in-situ energy loss and charge state of ion detector are briefly introduced.展开更多
A large scale scienti c research platform, named the High Intensity heavy-ion Accelerator Facility (HIAF), was proposed in light of the trend and development in nuclear physics and the associated high energy heavy ion...A large scale scienti c research platform, named the High Intensity heavy-ion Accelerator Facility (HIAF), was proposed in light of the trend and development in nuclear physics and the associated high energy heavy ion research elds. HIAF is one of the 16 approved national projects for basic sciences and technologies as the 12th ve-year-plan in China; it will be a laboratory open to the outside world, similar to CSR which was built as the 9th ve-year-plan in China[1].展开更多
In the framework of the HIAF fragment separator,about 50 superconducting magnets using Canted-Cosine-Theta coil configuration will be installed.As a proof of concept,0.8 m long multipole prototype magnet has been desi...In the framework of the HIAF fragment separator,about 50 superconducting magnets using Canted-Cosine-Theta coil configuration will be installed.As a proof of concept,0.8 m long multipole prototype magnet has been designed and fabricated to demonstrate its feasibility.A summary of the main parameters is given in Table 1.展开更多
High Intensity heavy-ion Accelerator Facility(HIAF)is designed by the Institute of Modern Physics,Chinese Academy of Sciences,which can accelerate particles form proton up to uranium.As shown in Fig.1,HIAF is composed...High Intensity heavy-ion Accelerator Facility(HIAF)is designed by the Institute of Modern Physics,Chinese Academy of Sciences,which can accelerate particles form proton up to uranium.As shown in Fig.1,HIAF is composed of the following parts:Superconducting Electron Cyclotron Resonance(SECR)ion source.展开更多
For the purpose of better performance,running stability and efficiency of CiADS and HIAF Superconducting Proton linac system,2K superfluid helium will be adopted for superconducting cavity cooling due to its specific ...For the purpose of better performance,running stability and efficiency of CiADS and HIAF Superconducting Proton linac system,2K superfluid helium will be adopted for superconducting cavity cooling due to its specific properties,such as high thermal conductivity,low viscosity.展开更多
A Quarter Wave Resonator(QWR)has been designed for the HIAF(High Intensity heavy ion Accelerator Facility)project.Working at 81.25 MHz,the QWR accelerates heavy ion beams from 0.8 to 5.3 MeV in the high Intensity heav...A Quarter Wave Resonator(QWR)has been designed for the HIAF(High Intensity heavy ion Accelerator Facility)project.Working at 81.25 MHz,the QWR accelerates heavy ion beams from 0.8 to 5.3 MeV in the high Intensity heavy ion superconducting LINAC section of HIAF.展开更多
1.Brief introduction of some main magnets used in HIAF project As shown in the layout of HIAF complex in Fig.1,more than 600 magnets will be used in HIAF project and some of them are challenging in design and fabricat...1.Brief introduction of some main magnets used in HIAF project As shown in the layout of HIAF complex in Fig.1,more than 600 magnets will be used in HIAF project and some of them are challenging in design and fabrication,such as rapid cycling magnets for BRing,SRing dipole and superconducting multipole magnets for HFRS.This report will give a brief introduction of them.展开更多
The 100 kV electron cooler device is designed for the new project HIAF to improve beam quality in SRing[1,2].The design work of the electron gun and the collector for the cooler has been finished and the prototype has...The 100 kV electron cooler device is designed for the new project HIAF to improve beam quality in SRing[1,2].The design work of the electron gun and the collector for the cooler has been finished and the prototype has being manufactured in the workshop.The structures of the gun and collector are shown in Fig.1.展开更多
Control network is one of the most important supportingl condition in HIAF (High Intensity Heavy-ion Accelerator Facility) control system. Only in aids of the control network, operators can remotely control or monitor...Control network is one of the most important supportingl condition in HIAF (High Intensity Heavy-ion Accelerator Facility) control system. Only in aids of the control network, operators can remotely control or monitor all kinds of devices in the accelerator while sitting in the central control room to achieve real-time control.展开更多
The high-intensity heavy-ion accelerator facility(HIAF)is under design at the Institute of Modern Physics(IMP)and will provide an intense ion beam for nuclear physics,atomic mass measurement research,and other applica...The high-intensity heavy-ion accelerator facility(HIAF)is under design at the Institute of Modern Physics(IMP)and will provide an intense ion beam for nuclear physics,atomic mass measurement research,and other applications.As the main ring of HIAF,the BRing accumulates beams to high intensity and accelerates them to high energy.To achieve high intensities up to 1×10^(11)(^(238)U^(34+)),the injection gain of the BRing must be as high as 88.However,multiple multiturn injection supported by the electron cooling system takes a long time,causing substantial beam loss under a strong space charge effect.Hence,a two-plane painting injection scheme is proposed for beam accumulation in the BRing.This scheme uses a tilted injection septum and horizontal and vertical bump magnets to paint the beam into horizontal and vertical phase space simultaneously.In this paper,the two-plane painting injection parameters are optimized,and the resulting injection process is simulated using the Objective Ring Beam Injection and Tracking(ORBIT)code.An injection gain of up to 110.3 with a loss rate of 2:3%is achieved,meeting the requirements of BRing.展开更多
基金supported by the National Natural Science Foundation of China(Nos.11605248,11605249,11605267,and 11805032.)
文摘A foil–microchannel plate(MCP)detector,which uses electrostatic lenses and possesses both good position and timing resolutions,has been designed and simulated for beam diagnostics and mass measurements at the next-generation heavy-ion-beam facility HIAF in China.Characterized by low energy loss and good performances of timing and position measurements,it would be located at focal planes in fragment separator HFRS for position monitoring,beam turning,Bq measurement,and trajectory reconstruction.Moreover,it will benefit the building-up of a magnetic-rigidity–energy-loss–time-offlight(BqDETOF)method at HFRS for high-precision in-flight particle identification of radioactive isotope beams on an event-by-event basis.Most importantly,the detector can be utilized for in-ring TOF and position measurements,beam-line TOF measurements at two achromatic foci,and position measurements at a dispersive focus of HFRS,thus making it possible to use two complementary mass measurement methods[isochronous mass spectrometry at the storage ring SRing and magnetic-rigidity–time-of-flight(BqTOF)at the beam-line HFRS]in one single experimental run.
基金This work was supported by the National Science Foun-dation of China(NSFC,Grant Nos.U1532263,11205225,11275241,11375034,11505248 and 11275238).
文摘The research activities on warm dense matter driven by intense heavy ion beams at the new project High Intensity heavy-ion AcceleratorFacility (HIAF) are presented. The ion beam parameters and the simulated accessible state of matter at HIAF are introduced, respectively. Theprogresses of the developed diagnostics for warm dense matter research including high energy electron radiography, multiple-channel pyrometer,in-situ energy loss and charge state of ion detector are briefly introduced.
文摘A large scale scienti c research platform, named the High Intensity heavy-ion Accelerator Facility (HIAF), was proposed in light of the trend and development in nuclear physics and the associated high energy heavy ion research elds. HIAF is one of the 16 approved national projects for basic sciences and technologies as the 12th ve-year-plan in China; it will be a laboratory open to the outside world, similar to CSR which was built as the 9th ve-year-plan in China[1].
文摘In the framework of the HIAF fragment separator,about 50 superconducting magnets using Canted-Cosine-Theta coil configuration will be installed.As a proof of concept,0.8 m long multipole prototype magnet has been designed and fabricated to demonstrate its feasibility.A summary of the main parameters is given in Table 1.
文摘High Intensity heavy-ion Accelerator Facility(HIAF)is designed by the Institute of Modern Physics,Chinese Academy of Sciences,which can accelerate particles form proton up to uranium.As shown in Fig.1,HIAF is composed of the following parts:Superconducting Electron Cyclotron Resonance(SECR)ion source.
文摘For the purpose of better performance,running stability and efficiency of CiADS and HIAF Superconducting Proton linac system,2K superfluid helium will be adopted for superconducting cavity cooling due to its specific properties,such as high thermal conductivity,low viscosity.
文摘A Quarter Wave Resonator(QWR)has been designed for the HIAF(High Intensity heavy ion Accelerator Facility)project.Working at 81.25 MHz,the QWR accelerates heavy ion beams from 0.8 to 5.3 MeV in the high Intensity heavy ion superconducting LINAC section of HIAF.
文摘1.Brief introduction of some main magnets used in HIAF project As shown in the layout of HIAF complex in Fig.1,more than 600 magnets will be used in HIAF project and some of them are challenging in design and fabrication,such as rapid cycling magnets for BRing,SRing dipole and superconducting multipole magnets for HFRS.This report will give a brief introduction of them.
基金National Natural Science foundation of China(11575264,11375245,11475235)Hundred Talents Project of CAS。
文摘The 100 kV electron cooler device is designed for the new project HIAF to improve beam quality in SRing[1,2].The design work of the electron gun and the collector for the cooler has been finished and the prototype has being manufactured in the workshop.The structures of the gun and collector are shown in Fig.1.
文摘Control network is one of the most important supportingl condition in HIAF (High Intensity Heavy-ion Accelerator Facility) control system. Only in aids of the control network, operators can remotely control or monitor all kinds of devices in the accelerator while sitting in the central control room to achieve real-time control.
基金supported by the National Natural Science Foundation of China(No.11505256)
文摘The high-intensity heavy-ion accelerator facility(HIAF)is under design at the Institute of Modern Physics(IMP)and will provide an intense ion beam for nuclear physics,atomic mass measurement research,and other applications.As the main ring of HIAF,the BRing accumulates beams to high intensity and accelerates them to high energy.To achieve high intensities up to 1×10^(11)(^(238)U^(34+)),the injection gain of the BRing must be as high as 88.However,multiple multiturn injection supported by the electron cooling system takes a long time,causing substantial beam loss under a strong space charge effect.Hence,a two-plane painting injection scheme is proposed for beam accumulation in the BRing.This scheme uses a tilted injection septum and horizontal and vertical bump magnets to paint the beam into horizontal and vertical phase space simultaneously.In this paper,the two-plane painting injection parameters are optimized,and the resulting injection process is simulated using the Objective Ring Beam Injection and Tracking(ORBIT)code.An injection gain of up to 110.3 with a loss rate of 2:3%is achieved,meeting the requirements of BRing.
