IPAC2016 - List of Keywords (ion-source)

Paper	Title	Other Keywords	Page
MOPMR048	Emittance Measurements and Operation Optimization for ECR Ion Sources	ion, emittance, ECR, cyclotron	361
	V. Tzoganis, C.P. Welsch The University of Liverpool, Liverpool, United Kingdom O. Kamigaito, T. Nagatomo, T. Nakagawa, V. Tzoganis RIKEN Nishina Center, Wako, Japan V. Tzoganis, C.P. Welsch Cockcroft Institute, Warrington, Cheshire, United Kingdom
	Funding: RIKEN IPA scheme and Cockcroft Institute Core Grant Electron Cyclotron Resonance (ECR) ion sources supply a broad range of ions for post acceleration in cyclotrons. Here, an effort to improve the beam transfer from RIKEN's 18 GHz ECR ion source to the Low Energy Beam Transfer (LEBT) line and an optimization of the performance of the ion source is presented. Simulation studies have shown that less than 20% of the beam is currently transferred. The first goal is to measure the transverse beam emittance in real time. The emittance monitor designed and fabricated for this purpose utilizes a pepper pot plate followed by a transparent scintillator and a CMOS camera for image capture. The second goal is to find the optimal operating point of the ion source by sweeping parameters such as RF power, vacuum pressure, extraction electrode position and voltage. To this extent, modifications of the ion source took place, as well as a measurement of the magnetic field inside the ion source. In this contribution the results of the emittance and other operating parameters measurements, as well as the design details of the emittance monitor are presented
DOI •	reference for this paper ※ DOI:10.18429/JACoW-IPAC2016-MOPMR048
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MOPOR035	Space Charge Neutralization Studies with H⁻ Beam in Low Energy Beam Transport Test Stand	space-charge, emittance, ion, rfq	677
	S. Artikova Private Address, Tsukuba, Japan K. Ikegami J-PARC, KEK & JAEA, Ibaraki-ken, Japan T. Shibata, A. Takagi KEK, Tokai, Ibaraki, Japan
	J-PARC is intensity-upgraded up to pulse current of 50 mA of H⁻ beam. Two-solenoid based LEBT test stand is being built to support the operation of J-PARC linac. It imitates the actual LEBT of linac, yet contains the diagnostics chamber composed of horizontal and vertical beam emittance-meters and Faraday-cup for the current measurement. Vacuum composition of LEBT is predominantly H2 gas. The pressure inside the LEBT can be varied by the differential pumps allowing us to study the beam phase space evolution under space charge effects. The measurements of the beam phase space emittance were made as a function of the residual gas pressure. This paper presents the results and discussion on beam space charge neutralization and its effect on the beam phase space emittance.
DOI •	reference for this paper ※ DOI:10.18429/JACoW-IPAC2016-MOPOR035
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MOPOY049	The PXIE LEBT Design Choices	ion, rfq, solenoid, vacuum	958
	L.R. Prost, A.V. Shemyakin Fermilab, Batavia, Illinois, USA
	Funding: Operated by Fermi Research Alliance, LLC, under Contract DE-AC02-07CH11359 with the United States Department of Energy Typical front-ends of modern light-ion high-intensity accelerators typically consist of an ion source, a Low Energy Beam Transport (LEBT), a Radiofrequency Quadrupole and a Medium Energy Beam Transport (MEBT), which is followed by the main linac accelerating structures. Over the years, many LEBTs have been designed, constructed and operated very successfully. In this paper, we present the guiding principles and compromises that lead to the design choices of the PXIE LEBT, including the rationale for a beam line that allows un-neutralized transport over a significant portion of the LEBT whether the beam is pulsed or DC.
DOI •	reference for this paper ※ DOI:10.18429/JACoW-IPAC2016-MOPOY049
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MOPOY052	200 MeV H⁻ Linac Upgrades at Brookhaven	linac, controls, ion, power-supply	968
	D. Raparia, J.G. Alessi, G. Atoian, B. Briscoe, C. Cullen, D.M. Gassner, O. Gould, M. Harvey, T. Lehn, V. LoDestro, M. Mapes, I. Marneris, A. McNerney, J. Morris, W.E. Pekrul, J. Ritter, R.F. Schoenfeld, F. Severino, C. Theisen, A. Zaltsman, A. Zelenski BNL, Upton, Long Island, New York, USA
	The 200 MeV H⁻ Linac has been operational for the last 45 years providing beam for the physics and isotope programs. Currently we are upgrading the Linac for improved reliability and integrated intensity. Recently we replaced the 7651 tubes with solid-state RF amplifiers. In addition, the low level RF system and Timing system were upgraded and new beam loss monitors were installed that is sensitive at low-energies and to neutrons. We have a plan for future upgrades to the vacuum, Controls, diagnostics and power supply systems. In order to achieve higher average current for the isotope program, it is plan to increase the beam pulse length from 450 us to 900 us. This will require modifications to the RF and all pulse power supply systems.
DOI •	reference for this paper ※ DOI:10.18429/JACoW-IPAC2016-MOPOY052
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TUOAA02	Status and Performance of ORNL Spallation Neutron Source Accelerator Systems	linac, rfq, operation, ion	1007
	Y.W. Kang, A.V. Aleksandrov, D.E. Anderson, M.S. Champion, M.T. Crofford, J. Galambos, B. Han, S.-H. Kim, S.W. Lee, J. Moss, V.V. Peplov, C. Piller, M.A. Plum, R.T. Roseberry, J.P. Schubert, A.P. Shishlo, M.P. Stockli, C.M. Stone, R.F. Welton, M. Wezensky, D.C. Williams, A.P. Zhukov ORNL, Oak Ridge, Tennessee, USA L.A. Longcoy, M. Magda, M.E. Middendorf, W.S. Passmore, C.C. Peters, J. Price, R.B. Saethre, J. Saunders ORNL RAD, Oak Ridge, Tennessee, USA
	Funding: This work was supported by SNS through UT-Battelle, LLC, under contract DE-AC05-00OR22725 for the U.S. DOE. The Spallation Neutron Source (SNS) accelerator sys-tems have been performing continuously and progressively since commissioning in 2006 to deliver the neutrons to beamlines. The 1.4 MW design beam power has been demonstrated during 24/7 operation while developments and investigations for system improvements are still ongoing to achieve the full design beam power and availability. Numerous difficulties that impeded reaching the full performance of the SNS accelerator systems have been identified and are being eliminated through repairs, upgrades, and developments. In this report, operational performance and developments of the accelerator systems are presented along with the efforts for future upgrades of the SNS.
	Slides TUOAA02 [5.410 MB]
DOI •	reference for this paper ※ DOI:10.18429/JACoW-IPAC2016-TUOAA02
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TUPMR001	Preliminary Test of 1 Mv Electrostatic Accelerator at Komac	ion, high-voltage, power-supply, extraction	1222
	D.I. Kim KAERI, Daejon, Republic of Korea Y.-S. Cho, H.-J. Kwon, S.H. Park Korea Atomic Energy Research Institute (KAERI), Gyeongbuk, Republic of Korea
	Funding: This work was supported by the Ministry of Education, Science and Technology of the Korean Government. 1 MV electrostatic accelerator is being developed to satisfy the needs from the users, especially for the applications with a MeV range ion beam implantation at KOrea Multi-purpose Accelerator Complex (KOMAC). Typically, the accelerator consists of ion source, beam transport system and target chamber. For the accelerating voltage of a MeV range, ELV type high voltage power supply has been selected. And then, ion source has been selected as the newly developed RF ion source which can be installed inside the pressure vessel of high voltage power supply due to its limited space and electrical power. In this paper, preliminary test of 1 MV electrostatic accelerator including test results in test stand is presented.
DOI •	reference for this paper ※ DOI:10.18429/JACoW-IPAC2016-TUPMR001
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TUPMR012	Investigation of Central Region Design of 10MeV AVF Cyclotron	cyclotron, ion, acceleration, injection	1253
	M. Afkhami Karaei, H. Afarideh, S. Azizpourian, R. Solhju AUT, Tehran, Iran J.-S. Chai, M. Ghergherehchi SKKU, Suwon, Republic of Korea
	Recently, studies on the central region of 10 MeV AVF Cyclotron have been done at AmirKabir University of Technology. In this study, the aim of the cyclotron design is to accelerate the ions up to 10MeV energy. The cyclotron, consist of four sector magnets and 2 RF cavities which will be operated at 71 MHz. The internal PIG ion source is used in this cyclotron. The purpose of this work is to investigate the behavior of trajectories of ions in the magnetic and electric fields at the center of the cyclotron. The electric and magnetic field distribution was designed by OPERA-3DTOSCA. In order to solve the equation of motion, numerical code was written in C++ program that used the conventional Rung-Kutta method. The obtained results of simulation were the horizontal and vertical motion of an ion in the center of cyclotron, and motion of the center of the orbits.
DOI •	reference for this paper ※ DOI:10.18429/JACoW-IPAC2016-TUPMR012
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TUPMR013	Heat Transfer Study of PIG Ion Source for 10 MeV Cyclotron	ion, cathode, electron, cyclotron	1256
	F. Zakerhosseini, H. Afarideh, S. Sabounchi AUT, Tehran, Iran J.-S. Chai, M. Ghergherehchi SKKU, Suwon, Republic of Korea
	A PIG Ion source provides H-ions for the 10 MeV cyclotron, which is designed and being manufactured by Amirkabir university of technology. Plasma created in the anode contains the desired ions. Discharge for producing plasma consists of the both ion current from plasma towards the cathode and the secondary electron current from the cathode to the plasma. Secondary electron emission is the result of ion collision on the surface of the cathode. Heat generated by these collisions is considerably high, so a cooling system for ion source is crucial. In this paper heat transfer study of the ion source, temperature distribution and deformation of different parts simulated using ANSYS CFX. Also the thermionic emission of the electrons from cathode in the calculated temperatures by ANSYS simulated Using CST STUDIO. Results showed the maximum temperature of the cathodes is 1992 K, which is far away from the cathode melting point. The thermionic current in 1992 K of cathode simulated and the results showed an electron current of 0.00706 A at 500 V which is negligible in comparison to the discharge current of 1 A. Maximum deformation were about 0.2 mm in cathode edges.
DOI •	reference for this paper ※ DOI:10.18429/JACoW-IPAC2016-TUPMR013
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TUPMR021	A Racetrack-shape Fixed Field Induction Accelerator for Giant Cluster Ions	ion, induction, acceleration, extraction	1278
	K. Takayama, T. Adachi, K. Okamura, M. Wake KEK, Ibaraki, Japan T. Adachi, K. Okamura Sokendai, Ibaraki, Japan Y. Iwata AIST, Tsukuba, Japan Y. Yuri JAEA/TARRI, Gunma-ken, Japan
	At KEK, circular induction accelerators employing an induction acceleration system, which is characterized by a simple fact of functional separation of acceleration and beam confinement, have been developed since 2000. The slow cycling induction synchrotron (IS) was demonstrated using the KEK 12 GeV PS in 2006, where superbunch formation and focusing-free transition energy crossing were realized. The fast cycling IS called the KEK digital accelerator is under operation since 2012, where bunch squeezing and splitting/merging never realized in RF synchrotrons have been demonstrated, as well as acceleration in a wide range of ion mass to charge ratio. Based on the experiences, a racetrack-shape fixed field induction accelerator (induction microtron)** that can accelerate giant cluster ions such as C-60 or Si-100, to high energy beyond that of electrostatic accelerators has been designed. Its full story and status of R&D work will be presented at the conference. * K.Takayama, Induction Accelerators (Springer, 2010), Chapter 11,12 K.Takayama et al., Phys. Rev. ST-AB 17, 010101(2014). * K.Takayama, T.Adachi, et al., Phys. Rev. ST-AB 18, 050101(2015).
DOI •	reference for this paper ※ DOI:10.18429/JACoW-IPAC2016-TUPMR021
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TUPMR022	Present Status and Future Plan of RIKEN RI Beam Factory	ion, cyclotron, acceleration, heavy-ion	1281
	O. Kamigaito, T. Dantsuka, M. Fujimaki, N. Fukunishi, H. Hasebe, Y. Higurashi, E. Ikezawa, H. Imao, M. Kase, M. Kidera, M. Komiyama, K. Kumagai, T. Maie, T. Nagatomo, T. Nakagawa, M. Nakamura, J. Ohnishi, H. Okuno, K. Ozeki, N. Sakamoto, K. Suda, S. Watanabe, T. Watanabe, Y. Watanabe, K. Yamada, H. Yamasawa RIKEN Nishina Center, Wako, Japan
	Recent efforts concerning the accelerators of the RIKEN RI Beam Factory (RIBF) have been directed towards achieving higher heavy-ion beam intensities. As shown at the IPAC2014 conference, the intensities of these ion beams have improved significantly following the construction of the new injector, RILAC2, which is equipped with a 28-GHz superconducting ECR ion source, development of the helium gas stripper, and upgrading of the bending power of the fRC. In this respect, this paper presents the subsequent upgrade programs conducted in the past two years, such as the development of a new charge stripper for uranium beam and a new acceleration scheme of krypton beam. The current performance level of the RIBF accelerator complex, as well as a future plan to further increase the beam intensities, are also presented.
DOI •	reference for this paper ※ DOI:10.18429/JACoW-IPAC2016-TUPMR022
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TUPMR031	Implementation and Preliminary Test of Electron Beam Ion Sources at KOMAC	ion, electron, dipole, rfq	1311
	S. Lee, Y.-S. Cho, H.S. Kim, H.-J. Kwon Korea Atomic Energy Research Institute (KAERI), Gyeongbuk, Republic of Korea
	Funding: This work has been supported through KOMAC operation fund of KAERI by Ministry of Science, ICT and Future Planning. Electron beam ion source (EBIS) has been one of widely used table-top devices for the production of highly charged ions by electron impact ionization. An EBIS employs a magnetically compressed, high energy and density electron beam to sequentially ionize atoms or ions with a low charge state. At KOMAC, we have a compact room-temperature operated EBIS. It is additionally constructed with a magnetic mass spectrometer and a Faraday Cup to measure charge spectra. Using this measurement setup, preliminary tests are performed to find suitable operational potentials in the EBIS for a stable production of highly charge ions. In future, we aim to build an EBIS based pre-injector with a radio frequency quadrupole. It has advantages of having a simple operation and a large number of ion species. For this, we intend to improve and modify the current EBIS design to incorporate with existing setups at KOMAC. M. A. Levin et al., Phys. Scr. T22, 157-163 (1988) ** J. Alessi et al., EBIS Pre-Injector Project Conceptual Design Report, Brookhaven National Laboratory (2005)
DOI •	reference for this paper ※ DOI:10.18429/JACoW-IPAC2016-TUPMR031
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TUPMR033	Low Emittance Growth in a LEBT with Un-neutralized Section	ion, emittance, solenoid, vacuum	1317
	L.R. Prost, J.-P. Carneiro, A.V. Shemyakin Fermilab, Batavia, Illinois, USA
	Funding: Operated by Fermi Research Alliance, LLC, under Contract DE-AC02-07CH11359 with the United States Department of Energy In a Low Energy Beam Transport line (LEBT), the emittance growth due to the beam's own space charge is typically suppressed by way of neutralization from either electrons or ions, which originate from ionization of the background gas. In cases where the beam is chopped, the neutralization pattern changes throughout the beginning of the pulse, causing the Twiss parameters to differ significantly from their steady state values, which, in turn, may result in beam losses downstream. For a modest beam perveance, there is an alternative solution, in which the beam is kept un-neutralized in the portion of the LEBT that contains the chopper. The emittance can be nearly preserved if the transition to the un-neutralized section occurs where the beam exhibits low transverse tails. This report discusses the experimental realization of such a scheme at Fermilab's PXIE, where low beam emittance dilution was demonstrated
DOI •	reference for this paper ※ DOI:10.18429/JACoW-IPAC2016-TUPMR033
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TUPMR034	Development and Tests of Beam Test Facility with New Spare RFQ for Spallation Neutron Source	rfq, ion, diagnostics, neutron	1320
	Y.W. Kang, A.V. Aleksandrov, M.S. Champion, M.T. Crofford, J. Moss, R.T. Roseberry, J.P. Schubert, M.P. Stockli, C.M. Stone, R.F. Welton, D.C. Williams, A.P. Zhukov ORNL, Oak Ridge, Tennessee, USA B. Han, S.W. Lee, M.E. Middendorf, J. Price, R.B. Saethre ORNL RAD, Oak Ridge, Tennessee, USA
	Funding: This work was supported by SNS through UT-Battelle, LLC, under contract DE-AC05-00OR22725 for the U.S. DOE. The Beam Test Facility (BTF) has been constructed to validate the performance of the new RFQ, to study ion source improvements, and to support neutron moderator development and six-dimensional phase space measure-ments for SNS. The BTF includes an H⁻ ion source, Ra-dio-Frequency Quadrupole (RFQ), and Medium Energy Beam Transport (MEBT) beam diagnostics systems. A spare RFQ was built and fully RF tested in the BTF and will be installed in the SNS linac in the future. The test stand is ready to run with the H⁻ ion beam through the new RFQ to fully validate the RFQ performance. The RFQ was designed to have the beam characteristics iden-tical to the existing RFQ with improved operational relia-bility and stability. The H⁻ RF plasma ion source system includes new high power RF components for improved front-end system performance.
DOI •	reference for this paper ※ DOI:10.18429/JACoW-IPAC2016-TUPMR034
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TUPMR041	Design of the Low Energy Beam Transport Line for Xi‘an Proton Application Facility	rfq, ion, solenoid, simulation	1343
	R. Ruo, L. Du, T. Du, X. Guan, C.-X. Tang, R. Tang, X.W. Wang, Q.Z. Xing, H.Y. Zhang, Q.Z. Zhang TUB, Beijing, People's Republic of China W.Q. Guan, Y. He, J. Li NUCTECH, Beijing, People's Republic of China
	Xi‘an Proton Application Facility (XiPAF) is a new proton project which is being constructed for single-event-effect experiments. It can provide proton beam with the maximum energy of 200 MeV. The accelerator facility of XiPAF mainly contains a 7 MeV H⁻ linac injector and a proton synchrotron accelerator. The 7 MeV H⁻ linac injector is composed of an ECR ion source, a Low Energy Beam Transport line (LEBT), a Radio Frequency Quadrupole accelerator (RFQ) and a Drift Tube Linac (DTL). The 50 keV 10 mA H⁻ beam (pulse width 1ms) extracted from the ion source is expected to be symmetric with the Twiss parameters alpha=0 and β=0.065 mm/mrad. The RMS normalized emittance is required to be less than 0.2 π mm·mrad. With an adjustable collimator and an electric chopper in the 1.7 m-long LEBT, the beam pulse width of 10~40μs and peak current of 6 mA can be obtained. The H⁻ beam is matched into the downstream RFQ accelerator with alpha=1.051 and β=0.0494 mm/mrad. This paper shows the detailed design process of the LEBT and simulation result with the TRACEWIN code.
DOI •	reference for this paper ※ DOI:10.18429/JACoW-IPAC2016-TUPMR041
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TUPMR057	High Current Proton and Carbon Beam Operation via Stripping of a Molecular Beam at GSI UNILAC	proton, ion, linac, operation	1390
	M. Heilmann, A. Adonin, W.A. Barth, Ch.E. Düllmann, R. Hollinger, E. Jäger, P. Scharrer, W. Vinzenz, H. Vormann GSI, Darmstadt, Germany W.A. Barth, Ch.E. Düllmann, P. Scharrer HIM, Mainz, Germany Ch.E. Düllmann Johannes Gutenberg University Mainz, Institut of Nuclear Chemistry, Mainz, Germany P. Scharrer Mainz University, Mainz, Germany
	The experimental program of the future facility for Antiproton and Ion Research (FAIR) project requires a high number of cooled anti-protons per hour. The FAIR proton injector linac has to deliver a 70 MeV, 35 mA pulsed proton beam at a repetition rate of 4 Hz. During recent machine investigations at the GSI a high current proton beam was achieved in the Universal Lineral Accelerator (UNILAC). In preparation for this the ion source was equipped with a newly developed 7-hole extraction system and optimized for single charged hydrocarbon beam (isobutane gas) operation. This beam was accelerated to 1.4 MeV/u and cracked in a new pulsed gas stripper into protons and charged carbon. The new stripper setup injects high density gas pulses synchronous with the transit of the beam pulse close to the beam trajectory. With this setup a proton (up to 4.3 mA) as well a carbon beam (up to 9.5 mA) intensity record at beam energy of 1.4 MeV was achieved. The proton beam was accelerated up to 3.6 MeV/u inside the first Alvarez-section with full transmission. The paper will present beam measurement in comparison to the former beam investigations using a 2 mA proton beam in the entire UNILAC.
DOI •	reference for this paper ※ DOI:10.18429/JACoW-IPAC2016-TUPMR057
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TUPMY042	Proton Injection into the Fermilab Integrable Optics Test Accelerator (IOTA)	rfq, proton, electron, optics	1638
	E. Prebys, K. Carlson, H. Piekarz, A. Valishev Fermilab, Batavia, Illinois, USA S. A. Antipov University of Chicago, Chicago, Illinois, USA
	Funding: This work is supported by the DOE, under Contract No. De-AC02-07CH11359. The Integrable Optics Test Accelerator (IOTA) is an experimental synchrotron being built at Fermilab to test the concept of non-linear "integrable optics". These optics are based on a lattice including non-linear elements that satisfies particular conditions on the Hamiltonian. The resulting particle motion is predicted to be stable but without a unique tune. The system is therefore insensitive to resonant instabilities and can in principle store very intense beams, with space charge tune shifts larger than those which are possible in conventional linear synchrotrons. The ring will initially be commissioned with electrons, but this poster describes progress toward the injection of protons into the ring, using the RFQ originally built for the High Energy Neutrino Source (HINS) project.
DOI •	reference for this paper ※ DOI:10.18429/JACoW-IPAC2016-TUPMY042
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TUPOY005	The Use of Cyclotron for PET/CT Scan in Indonesian Hospitals and Future Collaboration	cyclotron, ion, proton, HOM	1911
	N.S. Risdianto, J. Purwanto, F.A. Rahmadi Universitas Islam Negeri Sunan Kalijaga, Yogyakarta, Indonesia N. Risdiana UMY, Yogyakarta, Indonesia
	In Indonesia there are only three hospitals, which using cyclotrons for cancer detection (PET scans). These three hospitals are located in one place: Jakarta. With 1.4 percent of the Indonesian population are developing tumor/cancer, compared to the number of hospitals, which have advanced PET technology from cyclotrons, it will be a major task for the government to empower the production and overseas collaboration in the cyclotron industry.
DOI •	reference for this paper ※ DOI:10.18429/JACoW-IPAC2016-TUPOY005
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WEPMY031	The Production of Negative Carbon Ions with a Volume Cusp Ion Source	ion, extraction, plasma, electron	2620
	S.V. Melanson, M.P. Dehnel, C. Hollinger, P.T. Jackle, J.A. Martin, D.E. Potkins, T.M. Stewart, J.E. Theroux D-Pace, Nelson, British Columbia, Canada T.L. Jones, H.C. McDonald, C. Philpott BSL, Auckland, New Zealand
	Recent progress has been made at the newly commissioned Ion Source Test Facility (ISTF). Phase II, the final phase of the project, was completed in March 2016. First measurements were performed with D-Pace's TRIUMF licensed H⁻ ion source. The source was first characterized with H⁻ and an extraction study of the H⁻ ions was performed. A study of the production of heavy negative ions with volume cusp sources was started. Measurements with helium revealed no negative ions were extracted. Negative carbon ions were produced with acetylene. The beam composition has been analysed with a spectrometer.
DOI •	reference for this paper ※ DOI:10.18429/JACoW-IPAC2016-WEPMY031
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WEPMY032	A PID Control Algorithm for Filament-Powered Volume-Cusp Ion Sources	controls, ion, plasma, electron	2623
	S.V. Melanson, M.P. Dehnel, C. Hollinger, J.A. Martin, D.E. Potkins D-Pace, Nelson, British Columbia, Canada C. Philpott BSL, Auckland, New Zealand
	Volume-cusp ion sources require a fast and precise control algorithm to ensure the arc current, and thus the beam current is stable for high-power industrial DC operation. Using D-Pace's TRIUMF [1] licensed filament-powered H volume-cusp ion source, a proportional-integral-derivative (PID) control algorithm was implemented that provides a peak-to-peak beam current variation of ±0.45 % and a root mean square error of 0.025 mA for 10.16 mA of beam current over 60 minutes. The PID parameters were tuned for different set points and the performance of the algorithm is compared for the different settings. Measured arc current stability, and measured beam current as a function of time are presented and the algorithm utilized is described in detail.
DOI •	reference for this paper ※ DOI:10.18429/JACoW-IPAC2016-WEPMY032
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WEPOR057	A Mass Spectrometer for Measuring a High Current Ion Beam With a Big Range of the Charge-to-Mass Ratio	ion, radiation, detector, induction	2799
	Z. Bowen, S. An PLAI, Nanjing, People's Republic of China L. Zhang Chang'an University, Chang'an, People's Republic of China
	In order to analyze a high-current mixed-ion beam's physical properties with a current of 100 mA and a charge-to-mass ratio range from 1:1 to 1:48, a mass spectrometer has been developed to measure the beam's current, profile and ratio of the different ions by Nanjing University and Andesun Technology Inc. The main part of the mass spectrometer is a mass analyzer, which is used to measure the different ion's beam current at the same time. This paper introduces the design of the mass analyzer.
DOI •	reference for this paper ※ DOI:10.18429/JACoW-IPAC2016-WEPOR057
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THPOY025	From Standby Operation to Patient Treatment in 13 Months: Setting Up the MIT Accelerator Team	ion, operation, controls, linac	4146
	A. Peters, Th. Haberer HIT, Heidelberg, Germany U. Scheeler MIT, Marburg, Germany
	When the University Hospital Heidelberg took over the responsibility for the Marburg Ionbeam Therapy Centre (MIT), HIT as their daughter company was mandated to build up the operation team, especially for the accelerator. Based on long-standing experiences of HIT a very similar personnel concept was already available to be adapted to the MIT specialties. Within 9 months the directly started hiring process resulted in three technical teams with excellent engineers and technicians but with little or no accelerator experience. In parallel, three accelerator physicists were appointed for the executive team of MIT. Nevertheless for all hired persons a training program was set up consisting of technical instructions, lectures on fundamental accelerator physics and control system basics. These common trainings were complemented by individual skills development schedules for the tasks in the technical teams. HIT accelerator experts substantially carried out the recommissioning but in addition the new MIT employees were trained in designated shifts in the control room. Thus after only 13 months the MIT operation crew was able to operate the accelerator facility from the first patient treatment day on.
DOI •	reference for this paper ※ DOI:10.18429/JACoW-IPAC2016-THPOY025
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Paper

Title

Other Keywords

Page

MOPMR048

Emittance Measurements and Operation Optimization for ECR Ion Sources

ion, emittance, ECR, cyclotron

361

V. Tzoganis, C.P. Welsch
The University of Liverpool, Liverpool, United Kingdom
O. Kamigaito, T. Nagatomo, T. Nakagawa, V. Tzoganis
RIKEN Nishina Center, Wako, Japan
V. Tzoganis, C.P. Welsch
Cockcroft Institute, Warrington, Cheshire, United Kingdom

Funding: RIKEN IPA scheme and Cockcroft Institute Core Grant
Electron Cyclotron Resonance (ECR) ion sources supply a broad range of ions for post acceleration in cyclotrons. Here, an effort to improve the beam transfer from RIKEN's 18 GHz ECR ion source to the Low Energy Beam Transfer (LEBT) line and an optimization of the performance of the ion source is presented. Simulation studies have shown that less than 20% of the beam is currently transferred. The first goal is to measure the transverse beam emittance in real time. The emittance monitor designed and fabricated for this purpose utilizes a pepper pot plate followed by a transparent scintillator and a CMOS camera for image capture. The second goal is to find the optimal operating point of the ion source by sweeping parameters such as RF power, vacuum pressure, extraction electrode position and voltage. To this extent, modifications of the ion source took place, as well as a measurement of the magnetic field inside the ion source. In this contribution the results of the emittance and other operating parameters measurements, as well as the design details of the emittance monitor are presented

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MOPOR035

Space Charge Neutralization Studies with H⁻ Beam in Low Energy Beam Transport Test Stand

space-charge, emittance, ion, rfq

677

S. Artikova
Private Address, Tsukuba, Japan
K. Ikegami
J-PARC, KEK & JAEA, Ibaraki-ken, Japan
T. Shibata, A. Takagi
KEK, Tokai, Ibaraki, Japan

J-PARC is intensity-upgraded up to pulse current of 50 mA of H⁻ beam. Two-solenoid based LEBT test stand is being built to support the operation of J-PARC linac. It imitates the actual LEBT of linac, yet contains the diagnostics chamber composed of horizontal and vertical beam emittance-meters and Faraday-cup for the current measurement. Vacuum composition of LEBT is predominantly H2 gas. The pressure inside the LEBT can be varied by the differential pumps allowing us to study the beam phase space evolution under space charge effects. The measurements of the beam phase space emittance were made as a function of the residual gas pressure. This paper presents the results and discussion on beam space charge neutralization and its effect on the beam phase space emittance.

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MOPOY049

The PXIE LEBT Design Choices

ion, rfq, solenoid, vacuum

958

L.R. Prost, A.V. Shemyakin
Fermilab, Batavia, Illinois, USA

Funding: Operated by Fermi Research Alliance, LLC, under Contract DE-AC02-07CH11359 with the United States Department of Energy
Typical front-ends of modern light-ion high-intensity accelerators typically consist of an ion source, a Low Energy Beam Transport (LEBT), a Radiofrequency Quadrupole and a Medium Energy Beam Transport (MEBT), which is followed by the main linac accelerating structures. Over the years, many LEBTs have been designed, constructed and operated very successfully. In this paper, we present the guiding principles and compromises that lead to the design choices of the PXIE LEBT, including the rationale for a beam line that allows un-neutralized transport over a significant portion of the LEBT whether the beam is pulsed or DC.

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MOPOY052

200 MeV H⁻ Linac Upgrades at Brookhaven

linac, controls, ion, power-supply

968

D. Raparia, J.G. Alessi, G. Atoian, B. Briscoe, C. Cullen, D.M. Gassner, O. Gould, M. Harvey, T. Lehn, V. LoDestro, M. Mapes, I. Marneris, A. McNerney, J. Morris, W.E. Pekrul, J. Ritter, R.F. Schoenfeld, F. Severino, C. Theisen, A. Zaltsman, A. Zelenski
BNL, Upton, Long Island, New York, USA

The 200 MeV H⁻ Linac has been operational for the last 45 years providing beam for the physics and isotope programs. Currently we are upgrading the Linac for improved reliability and integrated intensity. Recently we replaced the 7651 tubes with solid-state RF amplifiers. In addition, the low level RF system and Timing system were upgraded and new beam loss monitors were installed that is sensitive at low-energies and to neutrons. We have a plan for future upgrades to the vacuum, Controls, diagnostics and power supply systems. In order to achieve higher average current for the isotope program, it is plan to increase the beam pulse length from 450 us to 900 us. This will require modifications to the RF and all pulse power supply systems.

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TUOAA02

Status and Performance of ORNL Spallation Neutron Source Accelerator Systems

linac, rfq, operation, ion

1007

Y.W. Kang, A.V. Aleksandrov, D.E. Anderson, M.S. Champion, M.T. Crofford, J. Galambos, B. Han, S.-H. Kim, S.W. Lee, J. Moss, V.V. Peplov, C. Piller, M.A. Plum, R.T. Roseberry, J.P. Schubert, A.P. Shishlo, M.P. Stockli, C.M. Stone, R.F. Welton, M. Wezensky, D.C. Williams, A.P. Zhukov
ORNL, Oak Ridge, Tennessee, USA
L.A. Longcoy, M. Magda, M.E. Middendorf, W.S. Passmore, C.C. Peters, J. Price, R.B. Saethre, J. Saunders
ORNL RAD, Oak Ridge, Tennessee, USA

Funding: This work was supported by SNS through UT-Battelle, LLC, under contract DE-AC05-00OR22725 for the U.S. DOE.
The Spallation Neutron Source (SNS) accelerator sys-tems have been performing continuously and progressively since commissioning in 2006 to deliver the neutrons to beamlines. The 1.4 MW design beam power has been demonstrated during 24/7 operation while developments and investigations for system improvements are still ongoing to achieve the full design beam power and availability. Numerous difficulties that impeded reaching the full performance of the SNS accelerator systems have been identified and are being eliminated through repairs, upgrades, and developments. In this report, operational performance and developments of the accelerator systems are presented along with the efforts for future upgrades of the SNS.

Slides TUOAA02 [5.410 MB]

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TUPMR001

Preliminary Test of 1 Mv Electrostatic Accelerator at Komac

ion, high-voltage, power-supply, extraction

1222

D.I. Kim
KAERI, Daejon, Republic of Korea
Y.-S. Cho, H.-J. Kwon, S.H. Park
Korea Atomic Energy Research Institute (KAERI), Gyeongbuk, Republic of Korea

Funding: This work was supported by the Ministry of Education, Science and Technology of the Korean Government.
1 MV electrostatic accelerator is being developed to satisfy the needs from the users, especially for the applications with a MeV range ion beam implantation at KOrea Multi-purpose Accelerator Complex (KOMAC). Typically, the accelerator consists of ion source, beam transport system and target chamber. For the accelerating voltage of a MeV range, ELV type high voltage power supply has been selected. And then, ion source has been selected as the newly developed RF ion source which can be installed inside the pressure vessel of high voltage power supply due to its limited space and electrical power. In this paper, preliminary test of 1 MV electrostatic accelerator including test results in test stand is presented.

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TUPMR012

Investigation of Central Region Design of 10MeV AVF Cyclotron

cyclotron, ion, acceleration, injection

1253

M. Afkhami Karaei, H. Afarideh, S. Azizpourian, R. Solhju
AUT, Tehran, Iran
J.-S. Chai, M. Ghergherehchi
SKKU, Suwon, Republic of Korea

Recently, studies on the central region of 10 MeV AVF Cyclotron have been done at AmirKabir University of Technology. In this study, the aim of the cyclotron design is to accelerate the ions up to 10MeV energy. The cyclotron, consist of four sector magnets and 2 RF cavities which will be operated at 71 MHz. The internal PIG ion source is used in this cyclotron. The purpose of this work is to investigate the behavior of trajectories of ions in the magnetic and electric fields at the center of the cyclotron. The electric and magnetic field distribution was designed by OPERA-3DTOSCA. In order to solve the equation of motion, numerical code was written in C++ program that used the conventional Rung-Kutta method. The obtained results of simulation were the horizontal and vertical motion of an ion in the center of cyclotron, and motion of the center of the orbits.

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TUPMR013

Heat Transfer Study of PIG Ion Source for 10 MeV Cyclotron

ion, cathode, electron, cyclotron

1256

F. Zakerhosseini, H. Afarideh, S. Sabounchi
AUT, Tehran, Iran
J.-S. Chai, M. Ghergherehchi
SKKU, Suwon, Republic of Korea

A PIG Ion source provides H-ions for the 10 MeV cyclotron, which is designed and being manufactured by Amirkabir university of technology. Plasma created in the anode contains the desired ions. Discharge for producing plasma consists of the both ion current from plasma towards the cathode and the secondary electron current from the cathode to the plasma. Secondary electron emission is the result of ion collision on the surface of the cathode. Heat generated by these collisions is considerably high, so a cooling system for ion source is crucial. In this paper heat transfer study of the ion source, temperature distribution and deformation of different parts simulated using ANSYS CFX. Also the thermionic emission of the electrons from cathode in the calculated temperatures by ANSYS simulated Using CST STUDIO. Results showed the maximum temperature of the cathodes is 1992 K, which is far away from the cathode melting point. The thermionic current in 1992 K of cathode simulated and the results showed an electron current of 0.00706 A at 500 V which is negligible in comparison to the discharge current of 1 A. Maximum deformation were about 0.2 mm in cathode edges.

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TUPMR021

A Racetrack-shape Fixed Field Induction Accelerator for Giant Cluster Ions

ion, induction, acceleration, extraction

1278

K. Takayama, T. Adachi, K. Okamura, M. Wake
KEK, Ibaraki, Japan
T. Adachi, K. Okamura
Sokendai, Ibaraki, Japan
Y. Iwata
AIST, Tsukuba, Japan
Y. Yuri
JAEA/TARRI, Gunma-ken, Japan

At KEK, circular induction accelerators employing an induction acceleration system, which is characterized by a simple fact of functional separation of acceleration and beam confinement, have been developed since 2000. The slow cycling induction synchrotron (IS) was demonstrated using the KEK 12 GeV PS in 2006, where superbunch formation and focusing-free transition energy crossing were realized*. The fast cycling IS called the KEK digital accelerator is under operation since 2012**, where bunch squeezing and splitting/merging never realized in RF synchrotrons have been demonstrated, as well as acceleration in a wide range of ion mass to charge ratio. Based on the experiences, a racetrack-shape fixed field induction accelerator (induction microtron)*** that can accelerate giant cluster ions such as C-60 or Si-100, to high energy beyond that of electrostatic accelerators has been designed. Its full story and status of R&D work will be presented at the conference.
* K.Takayama, Induction Accelerators (Springer, 2010), Chapter 11,12
** K.Takayama et al., Phys. Rev. ST-AB 17, 010101(2014).
*** K.Takayama, T.Adachi, et al., Phys. Rev. ST-AB 18, 050101(2015).

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TUPMR022

Present Status and Future Plan of RIKEN RI Beam Factory

ion, cyclotron, acceleration, heavy-ion

1281

O. Kamigaito, T. Dantsuka, M. Fujimaki, N. Fukunishi, H. Hasebe, Y. Higurashi, E. Ikezawa, H. Imao, M. Kase, M. Kidera, M. Komiyama, K. Kumagai, T. Maie, T. Nagatomo, T. Nakagawa, M. Nakamura, J. Ohnishi, H. Okuno, K. Ozeki, N. Sakamoto, K. Suda, S. Watanabe, T. Watanabe, Y. Watanabe, K. Yamada, H. Yamasawa
RIKEN Nishina Center, Wako, Japan

Recent efforts concerning the accelerators of the RIKEN RI Beam Factory (RIBF) have been directed towards achieving higher heavy-ion beam intensities. As shown at the IPAC2014 conference, the intensities of these ion beams have improved significantly following the construction of the new injector, RILAC2, which is equipped with a 28-GHz superconducting ECR ion source, development of the helium gas stripper, and upgrading of the bending power of the fRC. In this respect, this paper presents the subsequent upgrade programs conducted in the past two years, such as the development of a new charge stripper for uranium beam and a new acceleration scheme of krypton beam. The current performance level of the RIBF accelerator complex, as well as a future plan to further increase the beam intensities, are also presented.

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TUPMR031

Implementation and Preliminary Test of Electron Beam Ion Sources at KOMAC

ion, electron, dipole, rfq

1311

S. Lee, Y.-S. Cho, H.S. Kim, H.-J. Kwon
Korea Atomic Energy Research Institute (KAERI), Gyeongbuk, Republic of Korea

Funding: This work has been supported through KOMAC operation fund of KAERI by Ministry of Science, ICT and Future Planning.
Electron beam ion source (EBIS) has been one of widely used table-top devices for the production of highly charged ions by electron impact ionization. An EBIS employs a magnetically compressed, high energy and density electron beam to sequentially ionize atoms or ions with a low charge state*. At KOMAC, we have a compact room-temperature operated EBIS. It is additionally constructed with a magnetic mass spectrometer and a Faraday Cup to measure charge spectra. Using this measurement setup, preliminary tests are performed to find suitable operational potentials in the EBIS for a stable production of highly charge ions. In future, we aim to build an EBIS based pre-injector with a radio frequency quadrupole. It has advantages of having a simple operation and a large number of ion species**. For this, we intend to improve and modify the current EBIS design to incorporate with existing setups at KOMAC.
* M. A. Levin et al., Phys. Scr. T22, 157-163 (1988)
** J. Alessi et al., EBIS Pre-Injector Project Conceptual Design Report, Brookhaven National Laboratory (2005)

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TUPMR033

Low Emittance Growth in a LEBT with Un-neutralized Section

ion, emittance, solenoid, vacuum

1317

L.R. Prost, J.-P. Carneiro, A.V. Shemyakin
Fermilab, Batavia, Illinois, USA

Funding: Operated by Fermi Research Alliance, LLC, under Contract DE-AC02-07CH11359 with the United States Department of Energy
In a Low Energy Beam Transport line (LEBT), the emittance growth due to the beam's own space charge is typically suppressed by way of neutralization from either electrons or ions, which originate from ionization of the background gas. In cases where the beam is chopped, the neutralization pattern changes throughout the beginning of the pulse, causing the Twiss parameters to differ significantly from their steady state values, which, in turn, may result in beam losses downstream. For a modest beam perveance, there is an alternative solution, in which the beam is kept un-neutralized in the portion of the LEBT that contains the chopper. The emittance can be nearly preserved if the transition to the un-neutralized section occurs where the beam exhibits low transverse tails. This report discusses the experimental realization of such a scheme at Fermilab's PXIE, where low beam emittance dilution was demonstrated

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TUPMR034

Development and Tests of Beam Test Facility with New Spare RFQ for Spallation Neutron Source

rfq, ion, diagnostics, neutron

1320

Y.W. Kang, A.V. Aleksandrov, M.S. Champion, M.T. Crofford, J. Moss, R.T. Roseberry, J.P. Schubert, M.P. Stockli, C.M. Stone, R.F. Welton, D.C. Williams, A.P. Zhukov
ORNL, Oak Ridge, Tennessee, USA
B. Han, S.W. Lee, M.E. Middendorf, J. Price, R.B. Saethre
ORNL RAD, Oak Ridge, Tennessee, USA

Funding: This work was supported by SNS through UT-Battelle, LLC, under contract DE-AC05-00OR22725 for the U.S. DOE.
The Beam Test Facility (BTF) has been constructed to validate the performance of the new RFQ, to study ion source improvements, and to support neutron moderator development and six-dimensional phase space measure-ments for SNS. The BTF includes an H⁻ ion source, Ra-dio-Frequency Quadrupole (RFQ), and Medium Energy Beam Transport (MEBT) beam diagnostics systems. A spare RFQ was built and fully RF tested in the BTF and will be installed in the SNS linac in the future. The test stand is ready to run with the H⁻ ion beam through the new RFQ to fully validate the RFQ performance. The RFQ was designed to have the beam characteristics iden-tical to the existing RFQ with improved operational relia-bility and stability. The H⁻ RF plasma ion source system includes new high power RF components for improved front-end system performance.

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TUPMR041

Design of the Low Energy Beam Transport Line for Xi‘an Proton Application Facility

rfq, ion, solenoid, simulation

1343

R. Ruo, L. Du, T. Du, X. Guan, C.-X. Tang, R. Tang, X.W. Wang, Q.Z. Xing, H.Y. Zhang, Q.Z. Zhang
TUB, Beijing, People's Republic of China
W.Q. Guan, Y. He, J. Li
NUCTECH, Beijing, People's Republic of China

Xi‘an Proton Application Facility (XiPAF) is a new proton project which is being constructed for single-event-effect experiments. It can provide proton beam with the maximum energy of 200 MeV. The accelerator facility of XiPAF mainly contains a 7 MeV H⁻ linac injector and a proton synchrotron accelerator. The 7 MeV H⁻ linac injector is composed of an ECR ion source, a Low Energy Beam Transport line (LEBT), a Radio Frequency Quadrupole accelerator (RFQ) and a Drift Tube Linac (DTL). The 50 keV 10 mA H⁻ beam (pulse width 1ms) extracted from the ion source is expected to be symmetric with the Twiss parameters alpha=0 and β=0.065 mm/mrad. The RMS normalized emittance is required to be less than 0.2 π mm·mrad. With an adjustable collimator and an electric chopper in the 1.7 m-long LEBT, the beam pulse width of 10~40μs and peak current of 6 mA can be obtained. The H⁻ beam is matched into the downstream RFQ accelerator with alpha=1.051 and β=0.0494 mm/mrad. This paper shows the detailed design process of the LEBT and simulation result with the TRACEWIN code.

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TUPMR057

High Current Proton and Carbon Beam Operation via Stripping of a Molecular Beam at GSI UNILAC

proton, ion, linac, operation

1390

M. Heilmann, A. Adonin, W.A. Barth, Ch.E. Düllmann, R. Hollinger, E. Jäger, P. Scharrer, W. Vinzenz, H. Vormann
GSI, Darmstadt, Germany
W.A. Barth, Ch.E. Düllmann, P. Scharrer
HIM, Mainz, Germany
Ch.E. Düllmann
Johannes Gutenberg University Mainz, Institut of Nuclear Chemistry, Mainz, Germany
P. Scharrer
Mainz University, Mainz, Germany

The experimental program of the future facility for Antiproton and Ion Research (FAIR) project requires a high number of cooled anti-protons per hour. The FAIR proton injector linac has to deliver a 70 MeV, 35 mA pulsed proton beam at a repetition rate of 4 Hz. During recent machine investigations at the GSI a high current proton beam was achieved in the Universal Lineral Accelerator (UNILAC). In preparation for this the ion source was equipped with a newly developed 7-hole extraction system and optimized for single charged hydrocarbon beam (isobutane gas) operation. This beam was accelerated to 1.4 MeV/u and cracked in a new pulsed gas stripper into protons and charged carbon. The new stripper setup injects high density gas pulses synchronous with the transit of the beam pulse close to the beam trajectory. With this setup a proton (up to 4.3 mA) as well a carbon beam (up to 9.5 mA) intensity record at beam energy of 1.4 MeV was achieved. The proton beam was accelerated up to 3.6 MeV/u inside the first Alvarez-section with full transmission. The paper will present beam measurement in comparison to the former beam investigations using a 2 mA proton beam in the entire UNILAC.

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TUPMY042

Proton Injection into the Fermilab Integrable Optics Test Accelerator (IOTA)

rfq, proton, electron, optics

1638

E. Prebys, K. Carlson, H. Piekarz, A. Valishev
Fermilab, Batavia, Illinois, USA
S. A. Antipov
University of Chicago, Chicago, Illinois, USA

Funding: This work is supported by the DOE, under Contract No. De-AC02-07CH11359.
The Integrable Optics Test Accelerator (IOTA) is an experimental synchrotron being built at Fermilab to test the concept of non-linear "integrable optics". These optics are based on a lattice including non-linear elements that satisfies particular conditions on the Hamiltonian. The resulting particle motion is predicted to be stable but without a unique tune. The system is therefore insensitive to resonant instabilities and can in principle store very intense beams, with space charge tune shifts larger than those which are possible in conventional linear synchrotrons. The ring will initially be commissioned with electrons, but this poster describes progress toward the injection of protons into the ring, using the RFQ originally built for the High Energy Neutrino Source (HINS) project.

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TUPOY005

The Use of Cyclotron for PET/CT Scan in Indonesian Hospitals and Future Collaboration

cyclotron, ion, proton, HOM

1911

N.S. Risdianto, J. Purwanto, F.A. Rahmadi
Universitas Islam Negeri Sunan Kalijaga, Yogyakarta, Indonesia
N. Risdiana
UMY, Yogyakarta, Indonesia

In Indonesia there are only three hospitals, which using cyclotrons for cancer detection (PET scans). These three hospitals are located in one place: Jakarta. With 1.4 percent of the Indonesian population are developing tumor/cancer, compared to the number of hospitals, which have advanced PET technology from cyclotrons, it will be a major task for the government to empower the production and overseas collaboration in the cyclotron industry.

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WEPMY031

The Production of Negative Carbon Ions with a Volume Cusp Ion Source

ion, extraction, plasma, electron

2620

S.V. Melanson, M.P. Dehnel, C. Hollinger, P.T. Jackle, J.A. Martin, D.E. Potkins, T.M. Stewart, J.E. Theroux
D-Pace, Nelson, British Columbia, Canada
T.L. Jones, H.C. McDonald, C. Philpott
BSL, Auckland, New Zealand

Recent progress has been made at the newly commissioned Ion Source Test Facility (ISTF). Phase II, the final phase of the project, was completed in March 2016. First measurements were performed with D-Pace's TRIUMF licensed H⁻ ion source. The source was first characterized with H⁻ and an extraction study of the H⁻ ions was performed. A study of the production of heavy negative ions with volume cusp sources was started. Measurements with helium revealed no negative ions were extracted. Negative carbon ions were produced with acetylene. The beam composition has been analysed with a spectrometer.

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WEPMY032

A PID Control Algorithm for Filament-Powered Volume-Cusp Ion Sources

controls, ion, plasma, electron

2623

S.V. Melanson, M.P. Dehnel, C. Hollinger, J.A. Martin, D.E. Potkins
D-Pace, Nelson, British Columbia, Canada
C. Philpott
BSL, Auckland, New Zealand

Volume-cusp ion sources require a fast and precise control algorithm to ensure the arc current, and thus the beam current is stable for high-power industrial DC operation. Using D-Pace's TRIUMF [1] licensed filament-powered H volume-cusp ion source, a proportional-integral-derivative (PID) control algorithm was implemented that provides a peak-to-peak beam current variation of ±0.45 % and a root mean square error of 0.025 mA for 10.16 mA of beam current over 60 minutes. The PID parameters were tuned for different set points and the performance of the algorithm is compared for the different settings. Measured arc current stability, and measured beam current as a function of time are presented and the algorithm utilized is described in detail.

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WEPOR057

A Mass Spectrometer for Measuring a High Current Ion Beam With a Big Range of the Charge-to-Mass Ratio

ion, radiation, detector, induction

2799

Z. Bowen, S. An
PLAI, Nanjing, People's Republic of China
L. Zhang
Chang'an University, Chang'an, People's Republic of China

In order to analyze a high-current mixed-ion beam's physical properties with a current of 100 mA and a charge-to-mass ratio range from 1:1 to 1:48, a mass spectrometer has been developed to measure the beam's current, profile and ratio of the different ions by Nanjing University and Andesun Technology Inc. The main part of the mass spectrometer is a mass analyzer, which is used to measure the different ion's beam current at the same time. This paper introduces the design of the mass analyzer.

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THPOY025

From Standby Operation to Patient Treatment in 13 Months: Setting Up the MIT Accelerator Team

ion, operation, controls, linac

4146

A. Peters, Th. Haberer
HIT, Heidelberg, Germany
U. Scheeler
MIT, Marburg, Germany

When the University Hospital Heidelberg took over the responsibility for the Marburg Ionbeam Therapy Centre (MIT), HIT as their daughter company was mandated to build up the operation team, especially for the accelerator. Based on long-standing experiences of HIT a very similar personnel concept was already available to be adapted to the MIT specialties. Within 9 months the directly started hiring process resulted in three technical teams with excellent engineers and technicians but with little or no accelerator experience. In parallel, three accelerator physicists were appointed for the executive team of MIT. Nevertheless for all hired persons a training program was set up consisting of technical instructions, lectures on fundamental accelerator physics and control system basics. These common trainings were complemented by individual skills development schedules for the tasks in the technical teams. HIT accelerator experts substantially carried out the recommissioning but in addition the new MIT employees were trained in designated shifts in the control room. Thus after only 13 months the MIT operation crew was able to operate the accelerator facility from the first patient treatment day on.

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