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
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.
