IMP participated in the comparison of national individual dose which was organized by National Institute forRadiological Protection, China CDC, and the comparison results were corrected and was granted with certificat...IMP participated in the comparison of national individual dose which was organized by National Institute forRadiological Protection, China CDC, and the comparison results were corrected and was granted with certificate.In the comparison, RGD-3B reader, LiF(Mg,Cu,P)detectors, FJ411B annealing furnace and TLD400 detector boxwere used. The RGD-3B measuring system and LiF(Mg,Cu,P) thermoluminescence detectors were calibrated in2014. Five groups dosimeters marked number 1 to number 5 which used for routine monitor were selected to thecomparison, each group with ten detectors. The first five groups were bland samples. Group 6 was standby sampleand group 7 was for background dose monitor. The first 5 groups were exposed by the organizer in a standardflat water phantom in unknown direction with X or rays (according to ISO spectrum norm) with five differentunknown individual dose equivalent values Hp(10). The measured values were obtained according to calibrationfactors, readout values, and the corresponding background values.展开更多
Neutron energy, fluence rate, angular distributions and dose equivalent rate distributions around the thick Be, Cu, An targets bombarded by 50 MeV/u 18O-ion were measured using a threshold detector activation method. ...Neutron energy, fluence rate, angular distributions and dose equivalent rate distributions around the thick Be, Cu, An targets bombarded by 50 MeV/u 18O-ion were measured using a threshold detector activation method. At the same time,the neutron yields of 18O-ion and the neutron emission rates in the forward direction were obtained approximately.展开更多
Fluence rates and angular distributions of the neutron emitted by75 MeV/u 12C-ion bombardment on thick Be and An targets have been measured bymeans of the threshold detector activation method. Based on that, the neutr...Fluence rates and angular distributions of the neutron emitted by75 MeV/u 12C-ion bombardment on thick Be and An targets have been measured bymeans of the threshold detector activation method. Based on that, the neutron yields,emission rates in the forward direction and neutron dose equivalent rate distributionswere deduced.展开更多
The total operation time of HIRFL is 7 536 h in 2015; the user beam time is about 5 451.5 (from 21 Dec.2014 to 21 Dec. 2015); 4 836 h were used for experiments; 615.5 h were used for accelerator research. There are 26...The total operation time of HIRFL is 7 536 h in 2015; the user beam time is about 5 451.5 (from 21 Dec.2014 to 21 Dec. 2015); 4 836 h were used for experiments; 615.5 h were used for accelerator research. There are 26 heavy ions beams were provided by HIRFL in 2015. The highest ions energy provided is 464 MeV/u, the maximum accumulated ion intensity is 1 400 A for carbon ion.展开更多
To ensure the radiation safety of the accelerator staff, medical personnel, patients and surrounding residents,radiation monitoring system in the workplace was established at HIMM WuWei.The Radiation monitoring system...To ensure the radiation safety of the accelerator staff, medical personnel, patients and surrounding residents,radiation monitoring system in the workplace was established at HIMM WuWei.The Radiation monitoring system is composed of monitoring, data acquisition unit and central control computer,the structure shown in Fig. 1. Inside and outside the accelerator radiation area 14 monitoring points were arranged(Fig. 2). A neutron detector and a -ray detector was installed at each monitoring point.展开更多
Carbon ions offer significant advantages for deep-seated local tumors therapy due to their physical and biologicalproperties, for heavy ions has a fixed range in the target matter, and characterized by a small entranc...Carbon ions offer significant advantages for deep-seated local tumors therapy due to their physical and biologicalproperties, for heavy ions has a fixed range in the target matter, and characterized by a small entrance dose anda distinct maximum (Bragg peak) near the end of range. In 2006, IMP carried out some heavy ion cancer therapyexperiments. During the process of carbon ions cancer therapy, various kinds of secondary particle fragments arecreated from heavy ion reaction which will influence the treatment dose and healthy tissue of patient. Neutron isthe most abundant secondary particles in heavy ion reaction, which may influence largely patient body due to itsstrong penetrating power. Thus it is important to know the neutron contribution in heavy ion therapy to evaluatethe neutron impact and assess the patient safety. Particle fragments and its contribution from 430 MeV/u carbonions stopping in thick water target were calculated by Fluka Monte Carlo code[1].展开更多
The total operation time of HIRFL is 7 272 h in 2014, and the user beam time is about 4 964.5 h(from 21stDec.2013 to 21st Dec. 2014). 3 749 h for physics experiment, 332 h for life science research, 883.5 h for materi...The total operation time of HIRFL is 7 272 h in 2014, and the user beam time is about 4 964.5 h(from 21stDec.2013 to 21st Dec. 2014). 3 749 h for physics experiment, 332 h for life science research, 883.5 h for materialscience and single particle effect research, and 235 h for machine research. There are 24 heavy ions beams wereprovided by HIRFL in 2014. The highest ions energy provided is 487 MeV/u, and the maximum accumulated ionintensity is 1 000 A.展开更多
Space Environment Simulation and Research Infrastructure(SESRI)developed for Harbin Institute of Tech-nology is composed by many facilities including a proton accelerator with a maximum acceleration energy of 300 MeV....Space Environment Simulation and Research Infrastructure(SESRI)developed for Harbin Institute of Tech-nology is composed by many facilities including a proton accelerator with a maximum acceleration energy of 300 MeV.The 300 MeV ion accelerator radiation protection system consists of a dose monitoring system and a personal safety interlock system(Fig.1).展开更多
High Intensity heavy-ion Accelerator Facility(HIAF)is the next generation heavy ion accelerator facility in China,which can produce secondary radiation during operation.In order to protect the environment,the public a...High Intensity heavy-ion Accelerator Facility(HIAF)is the next generation heavy ion accelerator facility in China,which can produce secondary radiation during operation.In order to protect the environment,the public and workers from radiation,it is necessary to conduct radiation protection research and build personal safety interlocking system and radiation monitoring system.展开更多
This article focuses on the radiation shielding research of the coaxial cavity electron accelerator,a petal-shaped electron accelerator independently developed by the Institute of Modern Physics at the Chinese Academy...This article focuses on the radiation shielding research of the coaxial cavity electron accelerator,a petal-shaped electron accelerator independently developed by the Institute of Modern Physics at the Chinese Academy of Sciences.This study aims to provide reference for the radiation shielding design of similar devices in the future.The coaxial cavity electron accelerator mainly consists of an electron gun,a resonant cavity,nine external bending magnets.展开更多
The radiation safety license of IMP includes the using of the class Ⅰ,Ⅱ and Ⅲ radiation facilities,and the class Ⅲ,Ⅳ and Ⅴ radiation sources,which were reissued on June 23rd 2022.
Induced radioactivity in the treatment room(uniform scanning model)was investigated on Gansu Heavy Ion Tumor Hospital,a medical facility independently developed by the Institute of Modern Physics.The induced radioacti...Induced radioactivity in the treatment room(uniform scanning model)was investigated on Gansu Heavy Ion Tumor Hospital,a medical facility independently developed by the Institute of Modern Physics.The induced radioactivity of beam delivery system,patients,air,and the dose of medical sta,patients,and carers from the induced radioactivity were examined by the Monte Carlo simulation and experimental measurement.展开更多
In accordance with the recommendations of IAEA 398 Technical report and AAPM TG51 report of the American Association of Medical Physicists,it is necessary to establish the necessary metrology support capacity for the ...In accordance with the recommendations of IAEA 398 Technical report and AAPM TG51 report of the American Association of Medical Physicists,it is necessary to establish the necessary metrology support capacity for the measuring equipment of radiation therapy in proton and heavy ion therapy centers,as well as equipment for personnel radiation safety protection and radiation environment monitoring.展开更多
The Heavy Ion Medical Machine(HIMM)was developed by the Institute of Modern Physics(IMP)of the Chinese Academy of Sciences[1,2].A New machine is planned to be built at Putian,Fujian province which was composed of a cy...The Heavy Ion Medical Machine(HIMM)was developed by the Institute of Modern Physics(IMP)of the Chinese Academy of Sciences[1,2].A New machine is planned to be built at Putian,Fujian province which was composed of a cyclotron,a synchrotron,four treatment terminals and a Gantry treatment terminal.展开更多
Hazardous waste such as waste liquid,experimental waste,expired reagents and others that are produced by biological laboratory and chemical laboratory in the process of materials,biophysics and medical physics researc...Hazardous waste such as waste liquid,experimental waste,expired reagents and others that are produced by biological laboratory and chemical laboratory in the process of materials,biophysics and medical physics researching.展开更多
The renewal of the radiation safety license was completed in 2019.The license includes the using of the class Ⅰ,Ⅱ and Ⅲ radiation facility,and the class Ⅱ,Ⅳ and Ⅴ radiation sources.
A new radioactive ion beam line named HFRS(HIAF FRagment Separator)will be built at HIAF,where the rare isotopes are produced[1;2].It consists of a two-stage magnetic system,the pre-separator and the main-separator.Th...A new radioactive ion beam line named HFRS(HIAF FRagment Separator)will be built at HIAF,where the rare isotopes are produced[1;2].It consists of a two-stage magnetic system,the pre-separator and the main-separator.The former is used to distinguish the unreacted primary beam from the secondary beam,and the unreacted will be stopped in the beam dumps located between two dipoles;while the latter is used to purify the secondary beams.For the radiological safety of HFRS,the preliminary shielding design of pre-separator at HFRS is given in this work.All the calculations are conducted by the Monte Carlo code FLUKA[3].展开更多
The renewal of the radiation safety license was completed in 2018.The license includes the use of the class I,II and III radiation devices,and the class III,IV and V radiation sources.The class B radiochemistry Labora...The renewal of the radiation safety license was completed in 2018.The license includes the use of the class I,II and III radiation devices,and the class III,IV and V radiation sources.The class B radiochemistry Laboratory has passed the expert acceptance.The main radiation devices include type I radiation device–Heavy Ion Research Facility in Lanzhou HIRFL;type II radiation devices:ADS intensive-beam proton linear injector and high-current electron accelerator;and several type III radiographic devices.展开更多
文摘IMP participated in the comparison of national individual dose which was organized by National Institute forRadiological Protection, China CDC, and the comparison results were corrected and was granted with certificate.In the comparison, RGD-3B reader, LiF(Mg,Cu,P)detectors, FJ411B annealing furnace and TLD400 detector boxwere used. The RGD-3B measuring system and LiF(Mg,Cu,P) thermoluminescence detectors were calibrated in2014. Five groups dosimeters marked number 1 to number 5 which used for routine monitor were selected to thecomparison, each group with ten detectors. The first five groups were bland samples. Group 6 was standby sampleand group 7 was for background dose monitor. The first 5 groups were exposed by the organizer in a standardflat water phantom in unknown direction with X or rays (according to ISO spectrum norm) with five differentunknown individual dose equivalent values Hp(10). The measured values were obtained according to calibrationfactors, readout values, and the corresponding background values.
文摘Neutron energy, fluence rate, angular distributions and dose equivalent rate distributions around the thick Be, Cu, An targets bombarded by 50 MeV/u 18O-ion were measured using a threshold detector activation method. At the same time,the neutron yields of 18O-ion and the neutron emission rates in the forward direction were obtained approximately.
文摘Fluence rates and angular distributions of the neutron emitted by75 MeV/u 12C-ion bombardment on thick Be and An targets have been measured bymeans of the threshold detector activation method. Based on that, the neutron yields,emission rates in the forward direction and neutron dose equivalent rate distributionswere deduced.
文摘The total operation time of HIRFL is 7 536 h in 2015; the user beam time is about 5 451.5 (from 21 Dec.2014 to 21 Dec. 2015); 4 836 h were used for experiments; 615.5 h were used for accelerator research. There are 26 heavy ions beams were provided by HIRFL in 2015. The highest ions energy provided is 464 MeV/u, the maximum accumulated ion intensity is 1 400 A for carbon ion.
文摘To ensure the radiation safety of the accelerator staff, medical personnel, patients and surrounding residents,radiation monitoring system in the workplace was established at HIMM WuWei.The Radiation monitoring system is composed of monitoring, data acquisition unit and central control computer,the structure shown in Fig. 1. Inside and outside the accelerator radiation area 14 monitoring points were arranged(Fig. 2). A neutron detector and a -ray detector was installed at each monitoring point.
文摘Carbon ions offer significant advantages for deep-seated local tumors therapy due to their physical and biologicalproperties, for heavy ions has a fixed range in the target matter, and characterized by a small entrance dose anda distinct maximum (Bragg peak) near the end of range. In 2006, IMP carried out some heavy ion cancer therapyexperiments. During the process of carbon ions cancer therapy, various kinds of secondary particle fragments arecreated from heavy ion reaction which will influence the treatment dose and healthy tissue of patient. Neutron isthe most abundant secondary particles in heavy ion reaction, which may influence largely patient body due to itsstrong penetrating power. Thus it is important to know the neutron contribution in heavy ion therapy to evaluatethe neutron impact and assess the patient safety. Particle fragments and its contribution from 430 MeV/u carbonions stopping in thick water target were calculated by Fluka Monte Carlo code[1].
文摘The total operation time of HIRFL is 7 272 h in 2014, and the user beam time is about 4 964.5 h(from 21stDec.2013 to 21st Dec. 2014). 3 749 h for physics experiment, 332 h for life science research, 883.5 h for materialscience and single particle effect research, and 235 h for machine research. There are 24 heavy ions beams wereprovided by HIRFL in 2014. The highest ions energy provided is 487 MeV/u, and the maximum accumulated ionintensity is 1 000 A.
文摘Space Environment Simulation and Research Infrastructure(SESRI)developed for Harbin Institute of Tech-nology is composed by many facilities including a proton accelerator with a maximum acceleration energy of 300 MeV.The 300 MeV ion accelerator radiation protection system consists of a dose monitoring system and a personal safety interlock system(Fig.1).
文摘High Intensity heavy-ion Accelerator Facility(HIAF)is the next generation heavy ion accelerator facility in China,which can produce secondary radiation during operation.In order to protect the environment,the public and workers from radiation,it is necessary to conduct radiation protection research and build personal safety interlocking system and radiation monitoring system.
文摘This article focuses on the radiation shielding research of the coaxial cavity electron accelerator,a petal-shaped electron accelerator independently developed by the Institute of Modern Physics at the Chinese Academy of Sciences.This study aims to provide reference for the radiation shielding design of similar devices in the future.The coaxial cavity electron accelerator mainly consists of an electron gun,a resonant cavity,nine external bending magnets.
文摘The radiation safety license of IMP includes the using of the class Ⅰ,Ⅱ and Ⅲ radiation facilities,and the class Ⅲ,Ⅳ and Ⅴ radiation sources,which were reissued on June 23rd 2022.
文摘Induced radioactivity in the treatment room(uniform scanning model)was investigated on Gansu Heavy Ion Tumor Hospital,a medical facility independently developed by the Institute of Modern Physics.The induced radioactivity of beam delivery system,patients,air,and the dose of medical sta,patients,and carers from the induced radioactivity were examined by the Monte Carlo simulation and experimental measurement.
文摘In accordance with the recommendations of IAEA 398 Technical report and AAPM TG51 report of the American Association of Medical Physicists,it is necessary to establish the necessary metrology support capacity for the measuring equipment of radiation therapy in proton and heavy ion therapy centers,as well as equipment for personnel radiation safety protection and radiation environment monitoring.
文摘The Heavy Ion Medical Machine(HIMM)was developed by the Institute of Modern Physics(IMP)of the Chinese Academy of Sciences[1,2].A New machine is planned to be built at Putian,Fujian province which was composed of a cyclotron,a synchrotron,four treatment terminals and a Gantry treatment terminal.
文摘Hazardous waste such as waste liquid,experimental waste,expired reagents and others that are produced by biological laboratory and chemical laboratory in the process of materials,biophysics and medical physics researching.
文摘The renewal of the radiation safety license was completed in 2019.The license includes the using of the class Ⅰ,Ⅱ and Ⅲ radiation facility,and the class Ⅱ,Ⅳ and Ⅴ radiation sources.
文摘A new radioactive ion beam line named HFRS(HIAF FRagment Separator)will be built at HIAF,where the rare isotopes are produced[1;2].It consists of a two-stage magnetic system,the pre-separator and the main-separator.The former is used to distinguish the unreacted primary beam from the secondary beam,and the unreacted will be stopped in the beam dumps located between two dipoles;while the latter is used to purify the secondary beams.For the radiological safety of HFRS,the preliminary shielding design of pre-separator at HFRS is given in this work.All the calculations are conducted by the Monte Carlo code FLUKA[3].
文摘The renewal of the radiation safety license was completed in 2018.The license includes the use of the class I,II and III radiation devices,and the class III,IV and V radiation sources.The class B radiochemistry Laboratory has passed the expert acceptance.The main radiation devices include type I radiation device–Heavy Ion Research Facility in Lanzhou HIRFL;type II radiation devices:ADS intensive-beam proton linear injector and high-current electron accelerator;and several type III radiographic devices.
