TUP —  POSTER SESSION   (24-Sep-19   13:50—15:30)

Paper	Title	Page
TUP004	Integration of EtherCAT Hardware Into the EPICS Based Distributed Control System at iThemba LABS	152
	J.K. Abraham, W. Duckitt iThemba LABS, Somerset West, South Africa
	iThemba Laboratory for Accelerator Based Sciences (iThemba LABS) has, over the past 30 years, carried out several upgrades to its control electronics and software. This culminated in the adoption of EPICS as the de-facto distributed control system at the lab. In order to meet the changing technology and user requirements, iThemba LABS adopted EtherCAT as its new industrial communication standard. Building on an open EtherCAT master implementation and prior community development, iThemba LABS has successfully integrated a variety of EtherCAT hardware into its EPICS control system. This paper presents the open source software toolchain that has been developed and is used at iThemba LABS and showcases several hardware installations at the facility and abroad. Community involvement and future plans for this initiative are also presented.
	Poster TUP004 [2.679 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-Cyclotrons2019-TUP004
About •	paper received ※ 12 September 2019       paper accepted ※ 25 September 2019       issue date ※ 20 June 2020
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TUP005	Three Years Operation of CYCIAE-100	156
	T. Ge, L.C. Cao, Z.H. Fu, S.G. Hou, B. Ji, H. Jiang, S.Q. Li, Y.Q. Li, Z.W. Liu, Y.L. Lv, G.F. Pan, L. Wang, L.P. Wen, Z.G. Yin, T.J. Zhang CIAE, Beijing, People’s Republic of China
	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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TUP006	The Injection and Chopper-Based System at Arronax C70XP Cyclotron	159
	F. Poirier, F. Bulteau-harel, T. Durand, X. Goiziou, C. Koumeir, A. Sengar, H. Trichet Cyclotron ARRONAX, Saint-Herblain, France G. Blain, M. Fattahi, F. Haddad, J. Vandenborre SUBATECH, Nantes, France S. Chiavassa, G. Delpon ICO, Saint - Herblain, France F. Poirier CNRS - DR17, RENNES, France
	Funding: This work has been, in part, supported by grants from the French National Agency for Research, Arronax-Plus n°ANR-11-EQPX-0004, IRON n°ANR-11-LABX-18-01 and Next n°ANR-16-IDEX-0007. The multi-particle cyclotron of the Arronax Public Interest Group (GIP) is used to perform irradiation up to hundreds of µA on various experiments and targets. To support low and high average intensity usage and adapt the beam time structure required for high peak intensity operation and experiments such as pulsed experiments studies, it has been devised a pulsing system in the injection of the cyclotron. This system combines the use of a chopper, low frequency switch, and a control system based on the new extended EPICS network. This paper details the pulsing system adopted at Arronax, updates and results for various intensity experimental studies performed with alpha and proton beams. Updated work on the simulation of the injection is also shown, specifically towards high intensity future irradiation.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-Cyclotrons2019-TUP006
About •	paper received ※ 15 September 2019       paper accepted ※ 25 September 2019       issue date ※ 20 June 2020
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TUP007	Operational Experience in the Treatment of Ocular Melanomas with a New Digital Low-level RF Control System	162
	T. Fanselow, J. Bundesmann, A. Denker, U. Hiller HZB, Berlin, Germany J.K. Abraham, J.L. Conradie, W. Duckitt iThemba LABS, Somerset West, South Africa
	Ocular melanomas have been treated for the last 20 years at the Helmholtz-Zentrum Berlin in collaboration with the Charité Universitätsmedizin Berlin. However, parts of the initial control system electronics date back to the 1970s, when the machine was installed. Facing a critical shortage of legacy and obsolete components and with the down-time due to failures in the electronics on the increase, a decision was made to install the digital low-level RF control system, developed by iThemba LABS, on our K=132 cyclotron. A short description of the installation and commissioning process, which occurred in April 2017, and the experiences of the first 2 years of operation with the new digital low-level RF control system is presented.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-Cyclotrons2019-TUP007
About •	paper received ※ 14 September 2019       paper accepted ※ 25 September 2019       issue date ※ 20 June 2020
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TUP008	The Cyclotron TR-FLEX at the Center for Radiopharmaceutical Cancer Research at Helmholtz-Zentrum Dresden-Rossendorf	166
	M. Kreller, T. Knieß HZDR, Dresden, Germany S. Preusche Helmholtz-Zentrum Dresden-Rossendorf, Dresden, Germany
	The new Center for Radiopharmaceutical Cancer Research was established at Helmholtz-Zentrum Dresden-Rossendorf e. V. to centralize the main units: a high current proton cyclotron, a radiopharmaceutical production – GMP unit including quality control, laboratories for PET-radiochemistry, chemical and biochemical laboratories and laboratories for small animal imaging. The cyclotron TR-Flex was put into operation in 2017 and it is equipped with two extraction ports. Both are movable to adjust the proton energy in the range from 15 MeV up to 30 MeV. One extraction port is coupled with a combination magnet and two beam lines. A [123I]I-gas target station is installed at the first beam line and a four-port target selector at beamline two and at the second extraction port. Two [18F]F-water targets, a [18F]F2-gas target, a [11C]CH4-gas target, a [11C]CO2-gas target, a 30° and a 90° solid state target are mounted on the target selectors. In our contribution we report our experience of the new cyclotron during the first two operation years. Typical beam parameters and the reliability of the TR-FLEX are presented. Furthermore we describe the new home-built Radionuclide Distribution System.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-Cyclotrons2019-TUP008
About •	paper received ※ 18 September 2019       paper accepted ※ 26 September 2019       issue date ※ 20 June 2020
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TUP009	Cyclotron Cavity Pollution Recovery	169
	J. Dabin, B. Adant, P. Cailliau, K. Ellis, E. Forton, J. Mandrillon, T.S. Ponter, P. Verbruggen IBA, Louvain-la-Neuve, Belgium
	In a cyclotron, RF cavities are usually among the most reliable subsystems, provided minimal care and maintenance. Nevertheless, several parameters may affect cavity performance after several years of operation. To name a few typical causes of degradation are: decreasing vacuum quality, various gas loads or gas qualities triggering adverse effects, deposition of highly emissive material on the cavity due to overheating of components like pass-through connectors, accidental use of chemicals or not-suitable greases. The cavity status can be monitored but, in the worst cases, the RF tuning may become difficult and it is important to apply methods in order to recover a better cavity Q-factor. In this paper, cases of cavity pollution will be shown, their potential root causes discussed and some recovery methods described.
	Poster TUP009 [0.398 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-Cyclotrons2019-TUP009
About •	paper received ※ 12 September 2019       paper accepted ※ 25 September 2019       issue date ※ 20 June 2020
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TUP010	Buncher for the Optimization of the Injection of a 70 MeV Cyclotron	173
	P. Antonini, A. Lombardi, M. Maggiore, L. Pranovi INFN/LNL, Legnaro (PD), Italy L. Buriola Univ. degli Studi di Padova, Padova, Italy
	The design of an injection buncher for the 70 MeV cyclotron in use at LNL labs of INFN is under way. This buncher is to be installed between the ion source and the injection, to match the injected beam to the acceptance angle of the injection. The planned design is a 3/2 beta-λ double-gap driven with one or two harmonics of the 56 MHz RF frequency. Remotely-driven variable capacitors will be used for easy tuning of the matching box from the control system. The mechanical layout and simulations will be presented.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-Cyclotrons2019-TUP010
About •	paper received ※ 15 September 2019       paper accepted ※ 25 September 2019       issue date ※ 20 June 2020
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TUP011	Upgrade of the Central Region of the Superconducting Cyclotron at INFN-LNS	177
	G. D’Agostino, L. Calabretta, D. Rifuggiato INFN/LNS, Catania, Italy W.J.G.M. Kleeven IBA, Louvain-la-Neuve, Belgium
	The Superconducting Cyclotron (CS) at INFN-LNS is regularly operated with beam power up to 100 W. The present efforts in upgrading the cyclotron are directed towards an increase of beam power up to 10 kW for ions with mass number A < 40 and energies between 15 and 70 AMeV by means of increase of beam intensity. Moreover, a beam energy resolution of 0.1% is requested by the NUMEN project at INFN-LNS. We plan to achieve high beam power by increasing the efficiency of the injection and extraction processes. The current extraction efficiency is lower than 60%. We expect to increase it to a value close to 100% by extracting the specific ion beams by stripping and no longer by electrostatic deflectors. A spiral inflector is used to bent onto the median plane the ion beams produced by the two ECR ion sources. Including the effect of a drift buncher placed in the axial injection line, the current injection efficiency is about 15%. The study of an upgraded CS central region is ongoing at INFN-LNS. First results of simulation study aimed to increase the injection efficiency are presented.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-Cyclotrons2019-TUP011
About •	paper received ※ 14 September 2019       paper accepted ※ 25 September 2019       issue date ※ 20 June 2020
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TUP012	Upgrade of the iThemba LABS Neutron Beam Vault to a Metrology Facility	181
	N.B. Ndlovu, P.P. Malekapresenter, F.D. Smit iThemba LABS, Somerset West, South Africa A. Boso NPL, Middlesex, United Kingdom A. Buffler, D. Geduld, T. Hutton, T. Leadbeater UCT Physics, Cape Town, South Africa V. Lacoste IRSN, Saint-Paul-Lez-Durance, France
	Quasi-monoenergetic neutron beams are typically produced at the iThemba LABS fast neutron beam facility by the 7Li(p, xn) or 9Be(p, xn) reactions. With the proton beams available from the separated sector cyclotron, the neutron energy range from about 30 MeV to 200 MeV can be covered almost continuously. The facility first became operational in the late 1980s. The fast neutron beam facility at iThemba LABS has been designated by the National Metrology Institute of South Africa (NMISA) as an entity responsible for providing traceability for the medium and high-energy neutron measurements in South Africa. As a result, the facility is undergoing a major upgrade and development in order for it to meet the requirements for a medium and high-energy neutron metrology facility. As part of the ongoing upgrade, Monte Carlo (MC) simulations aimed at benchmarking the experimental data are ongoing.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-Cyclotrons2019-TUP012
About •	paper received ※ 14 September 2019       paper accepted ※ 25 September 2019       issue date ※ 20 June 2020
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TUP014	Deflecting System Upgrade Initial Simulations for 37 MeV Cyclotron at NPI Řež	185
	T. Matlocha NPI, Řež near Prague, Czech Republic
	NPI Řež U-120M multi-particle variable energy cyclotron system for positive ions extraction consists of three electrostatic deflectors, one active magnetic channel and an electromagnetic bump exciter. The deflectors transmission ratio for deuterons, alpha particles and Helium 3 ions is rather low, usually about 10%, for protons it is far below 5%. Based on an experience from other cyclotron laboratories, the general concept of the extraction system has been modified and the last two electrostatic deflectors were replaced with two magnetic channels. In the early stage of the upgrade, simulations were performed for protons at 28 MeV and Helium 3 ions at 44 MeV with and without the magnetic bump exciter. The extraction efficiency and beam losses along the extraction path are evaluated. The presented modified extraction system simulations suggest promising results. The total transmission ratio of the deflecting system has increased significantly, allowing work to continue and expect a positive final result.
	Poster TUP014 [1.241 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-Cyclotrons2019-TUP014
About •	paper received ※ 15 September 2019       paper accepted ※ 26 September 2019       issue date ※ 20 June 2020
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TUP016	New Centering Beam Monitor for High Power Proton Beam Rotating Target	189
	P.-A. Duperrex, P. Baumann, S. Joray, D.C. Kiselev, D. Laube, D. Reggiani PSI, Villigen PSI, Switzerland
	The high intensity proton accelerator (HIPA) at the Paul Scherrer Institut (PSI) delivers 590 MeV c.w. proton beam with currents of up to 2.4 mA, i.e. 1.4 MW beam power, For experiments of nuclear and material research the beam is directed to the 4 or 6 cm graphite 1 Hz rotating target (Target E). Centring the beam on the target is an important task for the operation and has safety issues in case of beam misalignment. Transmission monitoring has been the standard method to optimize the beam position on the target, though not very sensitive. A new method is currently being tested that provides a more sensitive off-axis detection. It is based on the detection of beam inten-sity modulation from the milled grooves at the target edge. This paper presents the concept and preliminary experimental results that can be obtained with this method.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-Cyclotrons2019-TUP016
About •	paper received ※ 15 September 2019       paper accepted ※ 26 September 2019       issue date ※ 20 June 2020
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TUP017	Manufacturing and Commissioning of Cyclotrons in a Series Production at Varian	192
	O. Boldt, M. Eichel, S. Lucht, L. Netterdon, A. Roth, M. Seher, T. Stephanipresenter, M. Wiesner VMS-PT, Troisdorf, Germany
	On 16th March 2019, Varian celebrated the 10th anniversary of first patient treatment in the Munich Proton Center, Germany. Since the first cyclotron installation, 22 more 250 MeV superconducting isochronous proton cyclotrons have successfully been manufactured, commissioned, and tested in our Troisdorf production line. During this process, an increasing experience with the cyclotron’s internal mechanisms and underlying physics allowed for a nowadays significant faster commissioning lead time without having changed the hardware setup substantially. Furthermore, we can already verify full clinical performance of each cyclotron in the factory test cells before delivery to the customer. Essential improvements in the areas of qualification of magnetic field configuration, RF conditioning, and beam commissioning are presented.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-Cyclotrons2019-TUP017
About •	paper received ※ 15 September 2019       paper accepted ※ 25 September 2019       issue date ※ 20 June 2020
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TUP019	Recent Extensions of JULIC for HBS Investigations	195
	O. Felden, N. Demary, N.-O. Fröhlich, R. Gebel, Y. Valdau FZJ, Jülich, Germany M. Rimmler JCNS, Jülich, Germany
	At the Forschungszentrum Jülich (FZJ) the energy variable cyclotron JULIC is used as injector of the Cooler Synchrotron (COSY) and for low to medium current irradiations of different types. Recently a new target station was set up and is mainly used for tests of new target materials, neutron target development and neutron yield investigations with high power proton or deuteron beam in perspective of a high brilliance accelerator based neutron source (HBS) with the Jülich Center for Neutron Science. The neutrons are produced exposing material targets or compounds to proton or deuterium particles of relative low final particle energy in the MeV range and will be optimized for neutron scattering to be realized at reasonable costs. Beside this, ToF-experiments are performed to investigate and optimize the pulsing structure for HBS. The target station is installed inside an experimental area offering space for complex detector and component setups for nuclear and neutron related experiments. But it is used for other purposes like electronic or detector tests and irradiation as well. This report briefly summarizes the history of JULIC and the activities for its future perspectives.
	Poster TUP019 [1.562 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-Cyclotrons2019-TUP019
About •	paper received ※ 15 September 2019       paper accepted ※ 25 September 2019       issue date ※ 20 June 2020
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TUP020	Beam Properties at the Experimental Target Station of the Proton Therapy in Berlin	199
	J. Bundesmann, A. Denker, J. Holz auf der Heide HZB, Berlin, Germany
	Beside the Therapy station for ocular tumors we have an experimental area to deliver protons and other ions. At this place there is also the possibility to do High Energy Pixe measurements on samples from cultural heritage. The positioning of the samples under test is possible by means of an xy-table with an range of 500x500 mm2 and a load of at least 50 kg, reproducibility ±0.1 mm. We can change the beam size between 1 mm diameter as focused beam and up to 50 mm diameter with different scattering foils and homogeneous dose spread. We can deliver beam intensities from single protons up to 1012 protons/cm2 * sec The energy can be set to 68 MeV with a single Bragg peak, spread out Bragg peaks with a mechanical range shifter or absorber plates to reduce the energy. The timing properties range from quasi DC to a single pulse width of 1 ns with a repetition rate up to 2.4 MHz. Instead of a scattering foil to increase the beam spots we also can use beam scanning with the focused beam to reduce the beam losses. We will show the different beam properties at the experimental target area for radiation hardness testing of solar cells, optical elements and electronics under test.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-Cyclotrons2019-TUP020
About •	paper received ※ 14 September 2019       paper accepted ※ 25 September 2019       issue date ※ 20 June 2020
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TUP021	Towards FLASH Proton Irradiation at HZB	202
	G. Kourkafas, J. Bundesmann, A. Denker, T. Fanselow, J. Röhrich HZB, Berlin, Germany V.H. Ehrhardt, J. Gollrad, J. Heufelder, A. Weber Charite, Berlin, Germany
	The HZB cyclotron has been providing protons for eye-tumor treatment for more than 20 years. While it has been very successful using conventional dose rates (15-20 Gy/min), recent studies indicate that rapid irradiation with very high dose rates (FLASH) might be equally efficient against tumors but less harmful to healthy tissues. The flexible operation schemes of the HZB cyclotron can provide beams with variable intensities and time structures, covering a wide unexplored regime within the FLASH requirements (>40 Gy/s in <500 ms). This paper presents the results of the first FLASH beam production at HZB towards the establishment of an in-vivo clinical irradiation in the future.
	Poster TUP021 [1.031 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-Cyclotrons2019-TUP021
About •	paper received ※ 12 September 2019       paper accepted ※ 25 September 2019       issue date ※ 20 June 2020
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TUP022	Status of a 70 MeV Cyclotron System for ISOL Driver of Rare Isotope Science Project in Korea	205
	J.-W. Kim, J. Kang, J.H. Kim, T.S. Shin IBS, Daejeon, Republic of Korea
	A 70 MeV H− cyclotron commercially available for medical isotope production will be used as an ISOL driver for rare isotope science project in Korea. The cyclotron is scheduled to be installed in 2021 for beam commissioning in the following year. In fact the building to house the cyclotron is currently almost complete so that the cyclotron system newly contracted needs to fit into the existing building, which brings some challenges in equipment installation and adaptation to utilities. Two beam lines to transport high-current proton beams into ISOL targets have been designed and are described along with other issues associated with the interface of the ISOL system.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-Cyclotrons2019-TUP022
About •	paper received ※ 12 September 2019       paper accepted ※ 25 September 2019       issue date ※ 20 June 2020
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TUP024	Muon Cyclotron for Transmission Muon Microscope	208
	T. Yamazaki, Y. Nagatani KEK, Tokai Branch, Tokai, Naka, Ibaraki, Japan T. Adachi, Y. Miyake KEK, Ibaraki, Japan A. Goto, J. Ohnishi RIKEN Nishina Center, Wako, Japan Y. Kumata, S. Kusuoka, T. Onda, H. Tsutsui SHI, Tokyo, Japan
	Funding: This work is supported by JSPS KAKENHI Grant Numbers JP17H06126 and JP19H05194. A transmission muon microscope is an unprecedented tool which enables its users to reconstruct 3D image of samples such as a living cell. Muons can gain penetrative power as their energy increase, though electrons above 1 MeV start to trigger electromagnetic showers and protons above 1 GeV cause nuclear reactions. Muons accelerated up to about 5 MeV are able to penetrate a living cell (~ 10 um), which is impossible with ultra-high voltage (1 MeV) electron microscopes. In order to accelerate muons, efficient acceleration is necessary because the lifetime of muons is only 2.2 us. In addition, it is important to accelerate muons without increasing their energy dispersion. A cyclotron with a flat-top acceleration system is the best suited for the transmission muon microscope and is being developed at the J-PARC muon facility (MUSE). In this poster, the transmission muon microscope project and the development of the muon cyclotron will be presented.
	Poster TUP024 [1.366 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-Cyclotrons2019-TUP024
About •	paper received ※ 14 September 2019       paper accepted ※ 25 September 2019       issue date ※ 20 June 2020
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TUP025	Feasibility Study for Converting the CS-30 Into a Variable Energy Cyclotron for Isotopes Production Using the Internal Target System	212
	H.A. Kassim KSU, Riyadh, Kingdom of Saudi Arabia H.F. Akhdar Al-Imam Mohammad Ibn Saud University, Riyadh, Kingdom of Saudi Arabia F.M. Alrumayanpresenter, A.M. Hendy King Faisal Specialist Hospital and Research Centre, Riyadh 11211, Kingdom of Saudi Arabia
	Funding: This project was supported by the NSTIP Strategic Technologies Program in the Kingdom of Saudi Arabia, award no. 14-MAT-1233-20. This paper reports a method to reduce the beam energy of the CS-30 cyclotron from 26.5 up to 10 MeV using the internal target system in CS-30 cyclotrons for isotopes production. Irradiation of solid targets, in this type of cyclotrons, take place when the target is positioned horizontally inside the cyclotron tank. In its final position, the target plate interrupts the beam from completing its orbit and nuclear reactions take place. Calculations are made to determine the beam energy as a function of radius. Verification of the new method was achieved by producing pure Ga-68 at an energy level of 11.5 MeV. [1] Gordon, M. M., Calculation of isochronous fields for sector-focused cyclotrons, Part. Accel., 13 (1983) 67-84 [2] Smith, Lloyd, ORBIT DYNAMICS IN THE SPIRAL-RIDGED CYCLOTRON, (2010) [3] Kleeven, W. J. G. M., Theory of accelerated orbits and space charge effects in an AVF cyclotron Eindhoven: Technische Universiteit Eindhoven, (1988)DOI: 10.6100/IR288492
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-Cyclotrons2019-TUP025
About •	paper received ※ 13 September 2019       paper accepted ※ 25 September 2019       issue date ※ 20 June 2020
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TUP026	Embedded Local Controller for the CS-30 Cyclotron	215
	A.M. Hendy, F.M. Alrumayanpresenter King Faisal Specialist Hospital and Research Centre, Riyadh 11211, Kingdom of Saudi Arabia H.A. Kassim KSU, Riyadh, Kingdom of Saudi Arabia
	Funding: This project was supported by the NSTIP Strategic Technologies Program in the Kingdom of Saudi Arabia, award no. 14-MAT-1233-20. The Embedded Local Controller is used for the purpose of upgrading our old CS-30 cyclotron control system. It is installed inside the cyclotron vault and connected to the control room using CAN serial bus. This is to avoid adding more wires from cyclotron vault to the outside, because there is no room for extra wires in the feedthrough conduits. The system is carefully designed to be fault tolerant so that it can run in a radiation environment without failure. Details of the design and field test results are presented.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-Cyclotrons2019-TUP026
About •	paper received ※ 15 September 2019       paper accepted ※ 25 September 2019       issue date ※ 20 June 2020
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TUP028	Bremsstrahlung Photons Emission in 28-GHz Electron Cyclotron Resonance Plasma	219
	M.J. Kumwenda, I.J. Lugendo Korea University, Seoul, Republic of Korea J.-K. Ahn, J.W. Lee Pusan National University, Pusan, Republic of Korea S.J. Kim, J.Y. Park, M. Won Korea Basic Science Institute, Busan, Republic of Korea
	Radial measurements of bremsstrahlung photons show high-energy intensity beyond a critical energy from electron cyclotron resonance (ECR) heating and its nature is not well understood so far. For the first time we have measured the bremsstrahlung photons energy intensity from 28-GHz ECR ion source at Busan Center of KBSI. Three round type NaI(Tl) detectors were used to measure the bremsstrahlung photons emitted at the center of the ECRIS at the same timeThe ECR ion source was operated at Radiofrequency (RF) power of 1 kW to extract 16O beam with a dominant fraction of O3+.We studied possible systematic uncertainties from different characteristics among the three NaI(Tl) detectors by repeating measurements alternatively. Geant4 simulation was performed to take the geometrical acceptance and energy-dependent detection efficiency into account due to large non-uniformity in the material budget. We extracted true bremsstrahlung energy spectra from the 28-GHz ECR ion source using the inverse-matrix unfolding method. The high energy intensities of the bremsstrahlung photons at the center of the ECRIS were explained by the internal structure and shape of ECR plasma.
	Poster TUP028 [1.240 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-Cyclotrons2019-TUP028
About •	paper received ※ 13 September 2019       paper accepted ※ 25 September 2019       issue date ※ 20 June 2020
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TUP029	A 15-Mev/nucleon Iso-Cyclotron for Security and Radioisotope Production	223
	C. Johnstone PAC, Batavia, Illinois, USA R.B. Agustsson, S. Boucher, S.V. Kutsaev, A.Yu. Smirnov RadiaBeam, Marina del Rey, California, USA R.C. Lanza MIT, Cambridge, Massachusetts, USA
	Funding: Work supported by US Dept of Energy under a Small Business Innovation Research Grant Cargo inspection systems exploit the broad bremsstrahlung spectrum from a 6-10 MeV, low-duty cycle electron accelerator which in the presence of significant backgrounds presents challenges in image and material identification. An alternative approach is to use ions which can excite nuclear states either directly, or through generation of secondary high-energy signature gammas produced from nuclear interactions in a target. RadiaBeam is designing a compact sector isocyclotron 1.25 m in radius, with high-gradient cavities to accelerate multi-ion species up to 15-20 MeV/u with large turn-to turn, centimeter-level separation for low-loss extraction without lossy foil stripping. A strong-focusing radial field profile will be optimized in a separated-sector format for control over machine tune simultaneous with isochronous orbist requirements for high-current (~0.5 milliamp) operation. Innovation in injection will be introduced to replace the high-loss central region. Non-security applications of the cyclotron include medical isotope production, ion radiobiology, as well as material science research and ion instrumentation development.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-Cyclotrons2019-TUP029
About •	paper received ※ 19 September 2019       paper accepted ※ 25 September 2019       issue date ※ 20 June 2020
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TUP030	Reinforcement Learning Based RF Control System for Accelerator Mass Spectrometry	227
	H.S. Kim, J.-S. Chai, Kh.M. Gad, M. Ghergherehchi, D.H. Hapresenter, J.C. Lee, H. Namgoong SKKU, Suwon, Republic of Korea
	Funding: Radiation Technology R&D program through the National Research Foundation of Korea funded by the Ministry of Science, ICT & Future Planning through the National Research Foundation of Korea Accelerator Mass Spectrometry (AMS) is a powerful method for separating rare isotopes and electrostatic type tandem accelerators have been widely used. At SungKyunKwan University, we are developing a AMS that can be used in a small space with higher resolution based on cyclotron. In contrast to the cyclotron used in conventional PET or proton therapy, the cyclotron-based AMS is characterized by high turn number and low dee voltage for high resolution. It is designed to accelerate not only 14C but also 13C or 12C. The AMS cyclotron RF control model has nonlinear characteristics due to the variable beam loading effect due to the acceleration of various particles and injected sample amounts. In this work, we proposed an AMS control system based on reinforcement learning. The proposed reinforcement learning finds the target control value in response to the environment through the learning process. We have designed a reinforcement learning based controller with RF system as an environment and verified the reinforcement learning based controller designed through the modeled cavity.
	Poster TUP030 [0.527 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-Cyclotrons2019-TUP030
About •	paper received ※ 14 September 2019       paper accepted ※ 25 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
	Y.L. Lv, S. An, T. Cui, T. Ge, B. Ji, X.L. Jia, S.L. Wang, T.J. Zhang CIAE, Beijing, People’s Republic of China
	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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TUP033	Concept of 15 Mev Cyclotron for Medical Isotopes Production	233
	O. Karamyshev JINR, Dubna, Moscow Region, Russia
	The purpose of this article is to show the prospects of cyclotrons with resistive coils and prove that even in such a well-established field there is still room for innovation. The concept of a 15 MeV cyclotron accelerating H¯ ions with a current of up to 1 mA is presented. The design features significantly lower weight and power consumption, compared to the majority of existing cyclotrons of the same energy.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-Cyclotrons2019-TUP033
About •	paper received ※ 15 September 2019       paper accepted ※ 25 September 2019       issue date ※ 20 June 2020
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TUP034	Study of MERIT Ring for Intense Secondary Particle Production	237
	H. Okita, Y. Ishi, Y. Kuriyama, Y. Moripresenter, T. Uesugi Kyoto University, Research Reactor Institute, Osaka, Japan
	Funding: This work is partially supported by ImPACT Program of Council for Science, Technology and Innovation (Cabinet Office, Government of Japan). An intense negative muon source MERIT (Multiplex Energy Recovery Internal Target) for the nuclear transformation to mitigate the long-lived fission products from nuclear plants have been proposed. For the purpose of proof-of principle of the MERIT scheme, a FFA (Fixed Field Alternating focusing) ring has been developed and beam experiments have been carried out. In this conference, the results of this study will be reported.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-Cyclotrons2019-TUP034
About •	paper received ※ 15 September 2019       paper accepted ※ 25 September 2019       issue date ※ 20 June 2020
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TUP035	Development of a Center Region for New Sumitomo Cyclotron	240
	N. Kamiguchi, M. Hirabayashi, J. Kanakura, Y. Kumata, Y. Mikami, H. Murata, H. Oda, T. Tachikawa, T. Takahashi, T. Tsurudome, H. Tsutsui, J.Y. Yoshida SHI, Kanagawa, Japan
	We, Sumitomo Heavy Industries, Ltd., have been developing a new AVF cyclotron which employs a super-conducting magnet. This cyclotron purposes proton therapy fields and is most compact and high intensity among AVF cyclotrons which can accelerate to 230 MeV. In this paper we report and focus on its center region. The center region consists of bellows. The PIG ion source with hot cathode is located at the center of the cyclotron. As this cyclotron has 3 T magnetic field, the filament receives the Lorentz force strongly. To avoid the filament deformation, AC current heating is newly introduced into this ion source. The over 40 µA output have been already confirmed in our test bench. The extraction of the proton beam is conducted with an RF electric field. On one counter dee electrode a beam chopper is equipped and on the other counter dee electrode, phase slits, a pair of vertical beam dumpers and a beam probe are equipped. To control the beam current, static electric beam choppers deflect the beam direction vertically. C-H coils are put on outside of the center region in the valley. In this paper, the concept of the center region of this new cyclotron will be discussed.
	Poster TUP035 [1.416 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-Cyclotrons2019-TUP035
About •	paper received ※ 13 September 2019       paper accepted ※ 26 September 2019       issue date ※ 20 June 2020
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TUP036	Optical Design of AVF Weak-Focusing Accelerator	242
	C. Hori, T. Aoki, T. Seki Hitachi Ltd., Ibaraki-ken, Japan T. Hae, H. Hiramoto Hitachi Ltd., Hitachi Research Laboratory, Ibaraki-ken, Japan
	A trend in proton beam therapy systems is downsizing their footprints. A larger main magnetic field for the downsizing, however, requires a septum magnet to generate a larger magnetic field for beam extraction. In order to relax the specification of the septum magnet, we consider an azimuthally varying field (AVF) weak-focusing accelerator. The magnetic fields of its hills and valleys can be designed while maintaining the average magnetic fields over the design orbits. Thus, by locating the septum magnet near one of the valleys, the specification is relaxed while keeping the footprint of the accelerator. In this study, we show an optical design of an AVF weak-focusing accelerator with cotangential orbits. The magnetic field in the valleys is smaller than the average magnetic field over the maximum energy orbit by 0.2 T. We evaluate gradient magnetic fields required for beam extraction and find the possibility of variable energy extraction by the static gradient fields.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-Cyclotrons2019-TUP036
About •	paper received ※ 13 September 2019       paper accepted ※ 25 September 2019       issue date ※ 20 June 2020
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TUP037	Compact Cotangential Orbit Accelerator for Particle Therapy	245
	T. Hae, H. Hiramoto Hitachi Ltd., Hitachi Research Laboratory, Ibaraki-ken, Japan T. Aoki, C. Hori, Y. Nakashima, F. Noda, T. Seki Hitachi Ltd., Ibaraki-ken, Japan
	A new type accelerator is being developed for the next generation particle therapy system. This accelerator utilizes a weak focusing DC magnetic field and a frequency modulated RF acceleration. Since a superconducting magnet is applicable to the main magnet, the accelerator can be compact. The accelerator characteristically has cotangential orbits to form an orbit-concentrated region. A beam is extracted from the region by using a new extraction method with the trans-verse RF kicker, peeler and regenerator magnetic fields. In this method an extracted beam energy can be controlled by applied time of the acceleration RF voltage without using an energy selection system (ESS). Intensity and pulse width of the extracted beam can be controlled by a voltage and / or a frequency pattern of the RF kicker.
	Poster TUP037 [0.740 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-Cyclotrons2019-TUP037
About •	paper received ※ 13 September 2019       paper accepted ※ 26 September 2019       issue date ※ 20 June 2020
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