| Paper | Title | Page |
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| WEAMH1 | The Commissioning Plan and Preparation for CSNS Accelerators | 1 |
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| The China Spallation Neutron Source (CSNS) accelerator consists of an 80MeV H− lianc and an 1.6GeV proton rapid cycling synchrotron, and it provide 100kW beam to the neutron target. At present, the most of the element of accelerator is under mass production and test. The installation and beam commissioning will be started from Ion Source, and done section by section. To make the beam commissioning smoothly and successfully, many preparation works on both accelerator physics and hardware have been doing. In this paper, the summary on the preparation work for beam commissioning is given, including the commissioning schedule, detailed commissioning plan, the development of the commissioning software, and etc. | ||
| WEPMH1 | New Development of the High Power Proton Cyclotrons at CIAE | 16 |
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Funding: Supported by National Natural Science Foundation of China(No.11375273) The high power proton beam has wide application potentials in future clean nuclear energy system, neutron physics study, RIB production and particle physics research. Cyclotrons are intrinsic in continuous-wave beam mode, which has the characteristics of high efficient power conversion rate, compact structure and relatively low construction cost. CIAE is dedicated to developing high power proton cyclotron in China for a long time. In this talk, the recent construction progress of the 100MeV cyclotron will be presented in detail. The commissioning of this cyclotron is in progress and we got the first beam on July 4, 2014. In additions, this talk also introduces the progress of the pre-study of a high power 800 MeV separate-sector ring cyclotron, which is proposed to provide high power proton beam for applications neutron and neutrino physics, proton radiography and nuclear data measurement. |
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| WEPMH3 | Design Study of a 250MeV Superconducting Isochronous Cyclotron for Proton Therapy | 23 |
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Funding: This work was supported by National Nature Science Foundation of China (11375068), and Hubei 2011 Project (Hubei Collaborative Innovation Center of Non-power Nuclear Technology. Proton therapy is recognized as the most effective radiation therapy method for cancers with very high cure rate of 80\%. Superconducting cyclotron becomes an optimum choice for delivering high quality proton beam due to its compactness, low power consuming and high stability. A 250MeV/500nA isochronous superconducting cyclotron was proposed in HUST, and the design and technical considerations on the spiral magnet, the tune optimization, and the beam extraction in high field will be introduces. |
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| WEPH16 | The Simulation of Stripping Extraction Process for CYCIAE-100 | 62 |
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| A 100 MeV H− compact cyclotron is under construction at China Institute of Atomic Energy (CYCIAE-100). The proton beams of 75 MeV - 100 MeV at an intensity of 200 μA will be extracted in dual opposite directions by charge exchange stripping devices. The two main parameters for the stripping extraction are the positions of stripping foil and combination magnet. For CYCIAE-100, the center of combination magnet is fixed at (R=2.75 m, θ=100°) and the extracted radii decide the positions of stripping foil for different extracted energies. In order to analyze the extracted proton beam parameters, the stripping extraction process for CYCIAE-100 is simulated in detail in this paper. The simulation is mainly done for the different RF acceptance or acceleration phase width. The simulation results indicate that the energy spreads of the extracted beams under different initial phase width conditions are almost the same. The transverse beam distribution and the extracted beam profile are not affected by the initial phase width due to the simulation, that's the characters of the cyclotron with the stripping extraction mode. | ||
WEPH18 |
Activities on Proton Accelerator R&D in Tsinghua University | |
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| Hadron Application and Technology Center (HATC) was founded in Tsinghua University at 2009, its mission is conducting research and development on proton accelerator and its application. The first project is Compact Pulsed Hadron Source (CPHS). It consists of an accelerator front-end'a high-intensity ion source, a 3 MeV radiofrequency quadrupole linac (RFQ), and a 13 MeV drift-tube linac (DTL), a neutron target station'a beryllium target with solid methane and room temperature water moderators/reflector, and tentatively six neutron stations for imaging/radiography, activation analysis, small-angle scattering, reflectometry, beamline optics development, and therapy. Up to now, the 3 MeV linac and target station have been finished. And neutron detecting experiments are underway. At the same time, a 200 MeV proton synchrotron dedicated space irradiation effects research is planed too. The main ring consists of 6 dipoles and 12 quadrupoles. A 7 MeV H− linac is as injector of the synchrotron. The HATC group is developing cooling system for FRIB 80MHz RFQ also. | ||
THAMH7 |
Design of a Compact Proton Synchrotron for Radiation Effects Simulation | |
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| A compact design of low energy proton synchrotron is proposed. This design is based on 'missing dipole' cell, which shows a great simplicity and convenient in this kind of application. As we would like to utilize slow extraction technology, the alignment of extraction elements is discussed. In each cycle，this machine would accelerate 2·1011 protons up to 230MeV. To accomplish this goal, we discuss the basic physical problems about acceleration and space charge effects. | ||
| THPMH2 | Electron Cooling Experiments at HIRFL-CSR | 113 |
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| Two new-generation electron coolers have been operated at main ring and experimental ring of HIRFL-CSR facility, respectively. The electron beam with a variable profile helps to get an ion beam with the emittance and intensity that meet the demands of specific physical experiments. Fast transverse cooling of the hot ion beam after horizontal multiturn of stripping injection allows beam accumulation at the injection energy. After optimization of the accumulation and cooling process an current increase by more than one order of magnitude has been achieved. Momentum spread in the 10-4 range has been demonstrated. In this paper, the longitudinal cooling force and the transverse cooling time measurements, the intrabeam scattering effect measurements were introduced. | ||
THPMH5 |
XAL Applications Development in CSNS | |
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| As high level physics applications, XAL was introduced to CSNS for the future accelerator commissioning. Some general applications of XAL can be used directly in CSNS, especially for linac and transport line. Because the rapid cycling ring (RCS) of CSNS is very different from the rings which XAL are used before, some applications must be customized for the RCS. Accordingly, the database which are used for the applications are also being developed. An introduction of XAL and the developing status in accelerator physics group of CSNS will be brought. | ||