| Paper | Title | Page |
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| MOP006 | The Design and Simulation on the Extraction System for CYCIAE-50 | 35 |
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| A 50 MeV H− compact cyclotron (CYCIAE-50) as a proton irradiation facility is under construction at China Institute of Atomic Energy. The proton beam with the energy of 30 MeV to 50 MeV and the current of 10 uA will be extracted by a single stripping extraction system. In order to reduce the beam loss, the combination magnet is fixed inside the magnetism yoke. The positions of stripping points for the different extraction energy are calculated and the extracted beam trajectories after stripping foil are simulated in detail in this paper. The extracted beam distribution after stripping foil and the extracted beam characters will be studied in this paper. The beam parameters after extraction will be given by the extracting orbit simulation. The design on the whole stripping extraction system has been finished and will be presented in this paper. | ||
| DOI • | reference for this paper ※ https://doi.org/10.18429/JACoW-Cyclotrons2019-MOP006 | |
| About • | paper received ※ 15 September 2019 paper accepted ※ 25 September 2019 issue date ※ 20 June 2020 | |
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| MOP007 | The Design and Calculation on the Injection and Central Region for CYCIAE-50 | 39 |
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| A 50 MeV cyclotron (CYCIAE-50) is been building at China Institute of Atomic Energy. CYCIAE-50 is a compact H− cyclotron with the proton beam energy of 30 MeV to 50 MeV and the beam current of 10 uA. A multi-cusp H− ion source with the beam current of 3 mA will be used for this machine. The design on the injection and central region of CYCIAE-50 has been finished. The way of matching the beam from ion source to central region and the design of central region will be present in this paper. In addition, some significant problems in central region will be discussed, including radial alignment, axial focusing, longitudinal focusing and energy gain, etc. | ||
| DOI • | reference for this paper ※ https://doi.org/10.18429/JACoW-Cyclotrons2019-MOP007 | |
| About • | paper received ※ 15 September 2019 paper accepted ※ 26 September 2019 issue date ※ 20 June 2020 | |
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| MOP008 | Mechanical Design of Beam Lines for a 230 MeV SC Cyclotron at CIAE | 42 |
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Funding: This work was supported in part by the National Natural Science Foundation of China under Grant 11475269 and 11375274. To develop the proton beam transfer system which used in the field of proton therapy, the mechanical design of proton beam lines based on the CYCIAE-230 has been finished at the China Institute of Atomic Energy (CIAE). The proton beam transfer system includes the beam lines, beam dump, gantry, nozzle, couch, image guidance system, etc. Two beam lines are designed at CIAE this moment. One is for the nozzle system, the other is for the beam dump. The beam lines include four systems: the energy selection system, the beam transportation systems, gantry system, beam dump. The beam lines are very compact in order to match the beam optics and the space limitation. The gantry can be rotated ±180°. There are several key components in beam lines, such as magnets, degrader, beam diagnostics component, vacuum component, etc. The designed mechanical tolerance of the magnets is limited less than 0.1 mm. There are at least four targets on each magnets for collimation and all the components can be adjusted in three dimensions. The magnets are being manufactured now. The mechanical design of proton beam lines based on the CYCIAE-230 will be presented in this paper. |
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| DOI • | reference for this paper ※ https://doi.org/10.18429/JACoW-Cyclotrons2019-MOP008 | |
| About • | paper received ※ 15 September 2019 paper accepted ※ 26 September 2019 issue date ※ 20 June 2020 | |
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| MOP010 | A 50 MeV Proton Beam Line Design | 45 |
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| The cyclotron Center at the China Institute of Atomic Energy (CIAE) is now developing a medium-energy proton irradiation device that provides a proton beam with an energy range of 30 MeV to 50 MeV to simulate a space proton radiation environment, which has a significant impact on spacecraft. A beam transport line is designed for irradiation effect study based on the 50 MeV compact cyclotron, which requires continuous adjustment of the beam energy and the beam spot on the target requires high uniformity. The proton beam extracted from the cyclotron is adjusted to the energy required by using the degrader, then the proton beam is bended and focused. In order to obtain uniform large-diameter beam spot on the target, a wobbling magnet is installed on the beam line to uniformly sweep the proton beam on the target and finally obtain the proton beam with energy of 30 MeV - 50 MeV, current of 10 uA and beam spot of 20 cm * 20 cm on the target. | ||
| DOI • | reference for this paper ※ https://doi.org/10.18429/JACoW-Cyclotrons2019-MOP010 | |
| About • | paper received ※ 15 September 2019 paper accepted ※ 26 September 2019 issue date ※ 20 June 2020 | |
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| TUP005 | Three Years Operation of CYCIAE-100 | 156 |
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| The 100 MeV high intensity proton cyclotron (CYCIAE-100) developed by China Institute of Atomic Energy is a multi-purpose variable energy AVF cyclotron. Its design specifications are: energy from 75 to 100 MeV continuously adjustable, beam intensity 200uA, beam current can be extracted in both directions. CYCIAE-100 was commissioned to extract 100 MeV proton beam for the first time in July 2014. The first physics experiment was carried out in November 2016. By June 2019, the design specifications of CYCIAE-100 was commissioned and the maximum beam power was 52 kW. The beam intensity range from 1 pA to 520 µA is achieved, and the beam stability is about 1% for 8 hours. Several typical physics experiments have been carried out. Such as: The physics experiment of CYCIAE-100 driving ISOL device to generate radioactive nuclear beam, SiC and SRAM proton irradiation experiments, calibration experiment of high-energy proton electron total dose detector probe, etc. At present, the beam time for CYCIAE-100 is about 5,000 hours, providing effective beam time for more than 3,000 hours for many users at home and abroad, and the other beam time for beam development. | ||
| DOI • | reference for this paper ※ https://doi.org/10.18429/JACoW-Cyclotrons2019-TUP005 | |
| About • | paper received ※ 15 September 2019 paper accepted ※ 26 September 2019 issue date ※ 20 June 2020 | |
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| TUP031 | Design and Construction Progress of Cyclotron Based Proton Irradiation Facility for Space Science | 230 |
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| The proton irradiation facility for space science research and application consists of a 50 MeV proton cyclotron, two beam lines and two radiation effect simulation experimental target station. The 50 MeV proton cyclotron (CYCIAE-50) is a compact negative hydrogen ion cyclotron with the proton beam energy from 30 MeV to 50 MeV, and the beam intensity is from 10 nA to 10 uA. The cyclotron is about 3.2 m in diameter, 3.5 m in total height and 80 tons in total weight. The diameter of the pole is 2000 mm, the outer diameter of the yoke is 3200 mm, and the height of magnet is 1500 mm. The cyclotron uses an external multi-cusp H− ion source. Then the H− beam is injected into the accelerating orbit by the spiral inflector. The cyclotron frequency is about 16 MHz. The RF system is a pair of λ/2 RF cavities driven by a 25 kW transmitter. The fourth harmonic accelerating frequency is about 65 MHz. The proton beam is extracted by a single movable stripping carbon foil with the stripping extraction efficiency of 99%. The 50 MeV cyclotron has now been designed in detail, and its main components, such as the main magnets and RF cavities, are being manufactured in the factories in China. | ||
| DOI • | reference for this paper ※ https://doi.org/10.18429/JACoW-Cyclotrons2019-TUP031 | |
| About • | paper received ※ 15 September 2019 paper accepted ※ 26 September 2019 issue date ※ 20 June 2020 | |
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