MC4: Hadron Accelerators
A08 Linear Accelerators

Paper	Title	Page
MOZZPLM1	Beam Commissioning of the Demonstrator Setup for the Superconducting Continuous Wave HIM/GSI-Linac	33
	M. Miski-Oglu, K. Aulenbacher, V. Gettmann, T. Kürzeder HIM, Mainz, Germany K. Aulenbacher, F.D. Dziuba IKP, Mainz, Germany W.A. Barth, C. Burandt, V. Gettmann, M. Heilmann, T. Kürzeder, A. Rubin, A. Schnase, S. Yaramyshev GSI, Darmstadt, Germany W.A. Barth, S. Yaramyshev MEPhI, Moscow, Russia M. Basten, M. Busch, T. Conrad, H. Podlech, M. Schwarz IAP, Frankfurt am Main, Germany
	During successful beam commissioning of the superconducting 15-gap Crossbar H-mode cavity at GSI Helmholtzzentrum für Schwerionenforschung heavy ions up to the design beam energy have been accelerated. The design acceleration gain of 3.5 MeV inside a length of less than 70 cm has been reached with full transmission for heavy ion beams of up to 1.5 particle mueA. The measured beam parameters confirm sufficient beam quality. The machine beam commissioning is a major milestone of the R&D for the superconducting heavy ion continuous wave linear accelerator HELIAC of Helmholtz Institute Mainz (HIM) and GSI developed in collaboration with IAP Goethe-University Frankfurt. The next step is the procurement and commissioning of so called ’Advanced Demonstrator’ - the first of series cryo module for the entire accelerator HELIAC. Results of further Demonstrator beam tests, as well as the status of the Advanced demonstrator project will be reported.
	Slides MOZZPLM1 [3.088 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2019-MOZZPLM1
About •	paper received ※ 29 April 2019       paper accepted ※ 24 May 2019       issue date ※ 21 June 2019
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MOPTS003	Superconducting LINAC Design Upgrade in View of the 100 MeV MYRRHA Phase I	837
	F. Bouly, M.A. Baylac LPSC, Grenoble Cedex, France A. Gatera SCK•CEN, Mol, Belgium D. Uriot CEA-DRF-IRFU, France
	Funding: Part of this work supported by the European Atomic Energy Community (EURATOM) H2020 Programme under grant agreement n°662186 (MYRTE project). The goal of the MYRRHA project is to demonstrate the technical feasibility of transmutation in a 100 MW Accelerator Driven System (ADS) by building a new flexible irradiation complex at Mol (Belgium). The MYRRHA facility requires a 600 MeV accelerator delivering a maximum proton current of 4 mA in continuous wave operation, with an additional requirement for exceptional reliability. Supported by SCK•CEN and the Belgium government the project has entered in its phase I: which consists in the development and the construction of the linac first part, up to 100 MeV. We review the design updates of the superconducting linac, with its enhanced fault-tolerance capabilities. The linac capabilities at 100 MeV (Phase I) and 600 MeV (ADS operation) are exposed and discussed.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2019-MOPTS003
About •	paper received ※ 23 April 2019       paper accepted ※ 20 May 2019       issue date ※ 21 June 2019
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MOPTS005	Status of the SPIRAL2 Project	844
	P. Dolegieviez, R. Ferdinand, X. Ledoux, H. Savajols, F. Varenne GANIL, Caen, France
	The SPIRAL2 facility at GANIL will use a high-power p, d and heavy-ion superconducting linac for a wide range of applications including RIB production using both ISOL and in-flight techniques. The SPIRAL2 phase 1 deals with the high-power superconducting linac with two experimental areas called ’Neutrons for Science’ (NFS) and ’Super Separator Spectrometer’ (S3). The low energy experimental hall DESIR, under construction, will further increase the possibility for physics experiments. All the linac is installed, the commissioning of the injec-tor part (two sources and the A/Q = 3 RFQ) and two cool down of the entire superconducting linac have been suc-cessfully done. We are now in the linac beam commis-sioning phase. The project scope and parameters, the constraints linked to the safety rules, the accelerator, NFS, S3 and DESIR status and the planning will be pre-sented.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2019-MOPTS005
About •	paper received ※ 14 May 2019       paper accepted ※ 20 May 2019       issue date ※ 21 June 2019
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MOPTS006	Final Results of the SPIRAL2 Injector Commissioning	848
	R. Ferdinand, M. Di Giacomo, H. Franberg, J.-M. Lagniel, G. Normand, A. Savalle GANIL, Caen, France D. Uriot CEA-DRF-IRFU, France
	The SPIRAL2 injector, made up of a 5 mA p-d ion source, a 1 mA heavy ion source (up to A/Q = 3) and a CW 0.75 MeV/u RFQ, has been commissioned in parallel with the superconducting linac installation. This com-missioning is successfully completed now and the Diag-nostic plate (D-plate) used to characterize the injector beams is removed. This paper presents the results ob-tained with the reference particles (H+, 4He2+, 18O6+ and 40Ar14+) and a comparison with the simulations. The connexion to the SC linac and the future linac beam commissioning is briefly described.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2019-MOPTS006
About •	paper received ※ 12 May 2019       paper accepted ※ 20 May 2019       issue date ※ 21 June 2019
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MOPTS007	SARAF Equipped Cavity Test Stand (ECTS) at CEA	852
	O. Piquet, C. Boulch, D. Chirpaz-Cerbat, G. Ferrand, F. Gohier, T.J. Joannem, G. Monnereau, Th. Plaisant CEA-IRFU, Gif-sur-Yvette, France D. Braud, P. Carbonnier, P. Guiho, L. Maurice, J. Plouin, P. Sahuquet, N. Solenne CEA-DRF-IRFU, France F. Gouit, A. Pérolat CEA, Gif-sur-Yvette, France
	CEA is committed to delivering a Medium Energy Beam Transfer line and a Super Conducting Linac (SCL) for SARAF accelerator in order to accelerate 5mA beam of either protons from 1.3MeV to 35MeV or deuterons from 2.6 MeV to 40.1MeV. The SCL consists in 4 cryomodules separated by warm section housing beam diagnostics. The two first identical cryomodules hosts respectively 6 and 7 half-wave resonator (HWR) low beta (0.091) cavities 176MHz. In order to test the cavity with its tuner and coupler and validate some design consideration, the Equipped Cavity Test Stand (ECTS) has been designed and will be presented.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2019-MOPTS007
About •	paper received ※ 07 May 2019       paper accepted ※ 20 May 2019       issue date ※ 21 June 2019
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MOPTS008	ESS RFQ: Construction Status and Power Couplers Qualification	855
	O. Piquet, A.C. Chauveau, D. Chirpaz-Cerbat, M. Desmons, A.C. France, P. Hamel, B. Pottin CEA-IRFU, Gif-sur-Yvette, France A. Dubois, A. Gaget, Y. Le Noa, L. Napoly, M. Oublaid, G. Perreu CEA-DRF-IRFU, France
	The 352 MHz Radio Frequency Quadrupole (RFQ) for the European Spallation Source ERIC (ESS) will be de-livered during 2019. It is provided by CEA, IRFU, Sac-lay/France. It consists of five sections with a total length of 4.6 m and accelerates the proton beam from 75 keV up to 3.6 MeV. It will be feed with 1.6 MW peak power through two coaxial loop couplers. This paper will present the manufacturing status of the five sections and the qualification test of the RF power couplers.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2019-MOPTS008
About •	paper received ※ 07 May 2019       paper accepted ※ 21 May 2019       issue date ※ 21 June 2019
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MOPTS015	FoS Cavity of the Alvarez 2.0 DTL as FAIR Injector	871
	M. Heilmann, X. Du, L. Groening, S. Mickat, C. Mühle, A. Rubin, V. Srinivasan GSI, Darmstadt, Germany
	The Alvarez 2.0 DTL will be the new post-stripper DTL of the UNILAC at GSI. The existing GSI with its LINAC and SIS18 comprise the main operation injector chain for the Facility for Antiproton and Ion Research FAIR. The new Alvarez-DTL has an operation frequency of 108.4 MHz, an input energy of 1.358 MeV/u and the output energy is 11.4 MeV/u with a total length of 55 m. The presented FoS section will be part of the first cavity of the Alvarez 2.0 DTL. The FoS-cavity with 11 drift tubes (including quadrupole singlets) and a total length of 1.9 m will be copper plated in GSI for high power tests. The design of the quadrupole singlet magnet is finalized; a prototype of a fully functional magnet with drift tube and stems will be fabricated within a design study. Empty drift tubes and all components of the tank shall be delivered 2019 for first low level RF investigations.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2019-MOPTS015
About •	paper received ※ 13 May 2019       paper accepted ※ 18 May 2019       issue date ※ 21 June 2019
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MOPTS019	End to End Simulations and Error Studies of the FAIR Proton Linac	885
	H. Hähnel, U. Ratzinger, M. Syha, R. Tiede IAP, Frankfurt am Main, Germany C.M. Kleffner GSI, Darmstadt, Germany
	The FAIR proton linac is developed as the high current proton injector for the future FAIR antiproton production chain at GSI. It will provide a 70 mA proton beam at an energy of 68 MeV to the SIS18 synchrotron. The linac consists of an ECR ion source, followed by a ladder RFQ and a normalconducting linac based on CH-type cavities. High beam currents and strict beam quality requirements were the main drivers for the beam dynamics design. To ensure matching between the individual sections and validate the injector design as a whole, end to end simulations were performed using TraceWin with 3D fieldmaps of the CH-linac. In this paper, the final cavity design, as well as the results of end to end simulations and error studies are discussed.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2019-MOPTS019
About •	paper received ※ 13 May 2019       paper accepted ※ 20 May 2019       issue date ※ 21 June 2019
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MOPTS020	Status of the FAIR Proton LINAC	889
	C.M. Kleffner, S. Appel, R. Berezov, J. Fils, P. Forck, P. Gerhard, M. Kaiser, K. Knie, A. Krämer, C. Mühle, S. Puetz, A. Schnase, G. Schreiber, A. Seibel, T. Sieber, V. Srinivasan, J. Trüller, W. Vinzenz, M. Vossberg, C. Will GSI, Darmstadt, Germany H. Hähnel, U. Ratzinger, M. Schuett, M. Syha IAP, Frankfurt am Main, Germany
	For the production of Antiproton beams with sufficient intensities, a dedicated high-intensity 325 MHz Proton linac is currently under construction. The Proton linac shall deliver a beam current of up to 70 mA with an energy of 68 MeV for injection into SIS18. The source is designed for the generation of 100 mA beams. The Low-Energy Beam Transport line (LEBT) contains two magnetic solenoid lenses enclosing a diagnostics chamber, a beam chopper and a beam conus. A ladder 4-Rod RFQ and six normal conducting crossbar cavities of CCH and CH type arranged in two sections accelerate the beam to the final energy of 68 MeV. The technical design of the DTL CH cavities are presented and the commissioning measurements of the ion source are described. The construction and the procurement progress, the design and testing results of the key hardware are presented.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2019-MOPTS020
About •	paper received ※ 14 May 2019       paper accepted ※ 23 May 2019       issue date ※ 21 June 2019
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MOPTS022	Current Status of the MYRRHA Cavities	892
SUSPFO019	use link to see paper's listing under its alternate paper code
	K. Kümpel, D. Bade, M. Busch, D. Koser, S. Lamprecht, N.F. Petry, H. Podlech, S. Zimmermann IAP, Frankfurt am Main, Germany
	The MYRRHA (Multi-purpose hYbrid Research Reac-tor for High-tech Applications) Project is a planned ac-celerator driven system (ADS) for the transmutation of long-living radioactive waste. In order test the reliability of the planned 17 MeV injector, a shortened injector with 5.9 MeV consisting of the ion source, a 4-Rod RFQ, 2 Quarter Wave Rebunchers (QWRs) and a total of 7 normal conducting CH structures is currently being installed in Louvein-la-Neuve (LLN, Belgium). Before the cavities can be tested with beam, they are subjected to so-called low power tests several times during the individual con-struction stages in order to be able to correct any devia-tions. This paper describes the status of the two Quarter Wave Rebunchers, which are currently in the process of copper plating and final acceptance, as well as the first two CH structures, the first of which is already being conditioned while CH 2 is still in preparation.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2019-MOPTS022
About •	paper received ※ 10 May 2019       paper accepted ※ 20 May 2019       issue date ※ 21 June 2019
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MOPTS023	Conditioning of the Frontline Cavities of the MYRRHA Injector	895
SUSPFO020	use link to see paper's listing under its alternate paper code
	S. Lamprecht, T. Conrad, K. Kümpel, N.F. Petry, H. Podlech IAP, Frankfurt am Main, Germany J. Belmans, D. Davin, W. De Cock, F. Pompon, D. Vandeplassche SCK•CEN, Mol, Belgium
	The MYRRHA Project (Multi-purpose hYbrid Research Reactor for High-tech Applications) in Mol, Belgium, is an upcoming accelerator driven system (ADS) for the transmutation of long-living radioactive waste. In the injector section of the accelerator, consisting of a 4-rod RFQ and a normal conducting CH-cavity section, the protons will be accelerated up to 17 MeV before entering the superconducting gap-spoke cavity section with an output energy of 600 MeV. A shortened test-injector with an output energy of 5.9 MeV is currently being installed at the SCK. CEN in Louvein-la- Neuve, Belgium. This test-injector serves the purpose of testing the reliability of the planned injector. When commissioning a cavity, it first has to be fed very little power to avoid damage to the structure by flashovers, discharges and multipacting. The power is then slowly increased up to full operation level. In this process, the surfaces are cleaned by heating/outgasing so that the effects disturbing operation described above do no longer occur. This paper will report on the status of the conditioning of the 176.1 MHz 4-rod RFQ up to 120 kW of the MYRRHA-injector and additional measurements concerning the gap voltage which are currently being performed at the SCK. CEN.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2019-MOPTS023
About •	paper received ※ 13 May 2019       paper accepted ※ 23 May 2019       issue date ※ 21 June 2019
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MOPTS024	Reconstruction of the Longitudinal Phase Portrait for the SC CW Heavy Ion HELIAC at GSI	898
	S. Lauber, K. Aulenbacher, W.A. Barth, C. Burandt, F.D. Dziuba, V. Gettmann, T. Kürzeder, J. List, M. Miski-Oglu HIM, Mainz, Germany K. Aulenbacher, F.D. Dziuba IKP, Mainz, Germany W.A. Barth, C. Burandt, F.D. Dziuba, P. Forck, V. Gettmann, M. Heilmann, T. Kürzeder, S. Lauber, J. List, M. Miski-Oglu, A. Rubin, T. Sieber, S. Yaramyshev GSI, Darmstadt, Germany H. Podlech, M. Schwarz IAP, Frankfurt am Main, Germany
	At the GSI Helmholtzzentrum für Schwerionenforschung (GSI) in Darmstadt, Germany, the HElmholtz LInear ACcelerator (HELIAC) is currently under construction. The HELIAC comprises superconducting multigap Crossbar H-mode (SC CH) cavities. The input beam is delivered by an already existing High Charge Injector (HLI). For the further development of the accelerator a detailed knowledge of the input beam parameters to the SC section is necessary. A method for beam reconstruction is incorporated, which provides for longitudinal beam characteristics using measurements with a beam shape monitor and a particle simulation code. This finalizes the investigations on 6D beam parameters, following previous measurements in transversal phase space. The reconstruction of the longitudinal phase portrait is presented.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2019-MOPTS024
About •	paper received ※ 24 April 2019       paper accepted ※ 20 May 2019       issue date ※ 21 June 2019
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MOPTS027	Conceptual Design of the Proton LINAC for the High Brilliance Neutron Source HBS	910
	H. Podlech, M. Droba, K. Kümpel, S. Lamprecht, O. Meusel, N.F. Petry, P.P. Schneider, M. Schwarz IAP, Frankfurt am Main, Germany J. Baggemann, Th. Brückel, T. Cronert, P.-E. Doege, T. Gutberlet, E. Mauerhofer, U. Rücker, P. Zakalek JCNS, Jülich, Germany S. Böhm NET, Aachen, Germany J. Li IEK, Jülich, Germany C. Zhang GSI, Darmstadt, Germany
	Due to the decommissioning of several research reactors there will be a severe drop in available neutrons for research in Europe in the next decade despite the commissioning of the European Spallation Source (ESS). Compact accelerator-based neutron sources (CANS) could close this gap. The High Brilliance Neutron Source (HBS) currently under development at Forschungszentrum Jülich is scalable in terms of beam energy and power due to its modular design. The driver Linac for HBS at will accelerate a 100 mA proton beam to 70 MeV. The Linac is operated with a beam duty cycle of up to 6% (11% RF duty cycle) and can simultaneously deliver three proton pulse lengths (384 Hz@52 mu-s, 96 Hz@208 mu-s and 24 Hz@832 mu-s) for three neutron production targets. In order to minimize the development effort and the technological risk, state-of-the-art technology of the MYRRHA injector is used. The front end of the HBS Linac consists of an ECR source, LEBT and a 2.5 MeV RFQ followed by a CH-DTL with 35 room temperature CH-cavities. All RF structures are operated at 176.1 MHz and are designed for high duty cycle. Solid-state amplifiers up to 500 kW are used as RF drivers. Due to the beam current and the high average beam power of up to 420 kW, particular attention is paid to beam dynamics. In order to minimize losses, a quasi-periodic lattice with constant negative phase is used. The contribution describes the conceptual design and the challenges of such a modern high power proton accelerator with high reliability and availability.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2019-MOPTS027
About •	paper received ※ 07 May 2019       paper accepted ※ 22 May 2019       issue date ※ 21 June 2019
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MOPTS033	RF Measurements and Tuning of the 325 MHz Ladder-RFQ	925
	M. Schuett, U. Ratzinger, M. Syha IAP, Frankfurt am Main, Germany
	Funding: BMBF 05P15RFRBA Based on the positive results of the unmodulated 325 MHz Ladder-RFQ prototype from 2013 to 2016, we developed and designed a modulated 3.4 m Ladder-RFQ*. The unmodulated Ladder-RFQ features a very constant voltage along the axis. It accepted 3 times the operating power of which is needed in operation**. That level corresponds to a Kilpatrick factor of 3.1 with a pulse length of 200 µs. The 325 MHz RFQ is designed to accelerate protons from 95 keV to 3.0 MeV according to the design parameters of the proton linac within the FAIR project. This particular high frequency for a 4-ROD-RFQ creates difficulties, which triggered the development of a Ladder-RFQ with its high symmetry. The results of the unmodulated prototype have shown, that the Ladder-RFQ is very well suited for that frequency. The duty cycle is up to 5% for the applied cooling concept. Manufacturing has been completed in September 2018. We will show the finalization of assembly after manufacturing as well as low level RF measurements. The final machining step for both flatness and frequency tuning has been finished in April 2019. *Journal of Physics: Conf. Series 874 (2017) 012048 **Proceedings of LINAC2016, East Lansing, TUPLR053
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2019-MOPTS033
About •	paper received ※ 01 May 2019       paper accepted ※ 17 May 2019       issue date ※ 21 June 2019
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MOPTS034	Advanced Beam Dynamics Design for the Superconducting Heavy Ion Accelerator HELIAC	928
SUSPFO024	use link to see paper's listing under its alternate paper code
	M. Schwarz, M. Basten, M. Busch, T. Conrad, H. Podlech IAP, Frankfurt am Main, Germany K. Aulenbacher IKP, Mainz, Germany K. Aulenbacher, W.A. Barth, C. Burandt, M. Heilmann, S. Lauber, J. List, A. Rubin, S. Yaramyshev GSI, Darmstadt, Germany K. Aulenbacher, W.A. Barth, C. Burandt, F.D. Dziuba, V. Gettmann, T. Kürzeder, S. Lauber, J. List, M. Miski-Oglu HIM, Mainz, Germany S. Lauber, J. List KPH, Mainz, Germany
	Funding: Work supported by BMBF contr. No. 05P18RFRB1, EU Framework Programme H2020 662186 (MYRTE) and HIC for FAIR The standalone superconducting (SC) continuous wave (CW) heavy ion linac HELIAC (HElmholtz LInear ACcelerator) is a common project of GSI and HIM under key support of IAP Frankfurt and in collaboration with Moscow Engineering Physics Institute (MEPhI) and Moscow Institute for Theoretical and Experimental Physics (KI-ITEP). It is intended for future experiments with heavy ions near the Coulomb barrier within super-heavy element (SHE) research and aims at developing a linac with multiple CH cavities as key components downstream the High Charge State Injector (HLI) at GSI. The design is challenging due to the requirement of intense beams in CW mode up to a mass-to-charge ratio of 6, while covering a broad output energy range from 3.5 to 7.3 MeV/u with minimum energy spread. In 2017 the first superconducting section of the linac has been successfully commissioned and extensively tested with beam at GSI. In the light of experience gained in this research so far, the beam dynamics layout for the entire linac has recently been updated and optimized with particular emphasis on realistic assumptions of cavity gap and drift lengths as well as gap voltage distributions for CH3’CH11.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2019-MOPTS034
About •	paper received ※ 30 April 2019       paper accepted ※ 18 May 2019       issue date ※ 21 June 2019
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MOPTS036	RFQ Electrodes Change and Upgrade Option at the UNILAC HSI Injector	936
	M. Vossberg, P. Gerhard, L. Groening, S. Mickat, H. Vormann, C. Xiao GSI, Darmstadt, Germany V. Bencini, J.M. Garland, J.-B. Lallement, A.M. Lombardi CERN, Geneva, Switzerland
	In order to meet the beam intensity and quality requirements imposed by FAIR, the HSI-RFQ beam dynamics originally dating from 2009 has been re-designed recently at CERN. Front-to-end simulations demonstrated that the new design meets the FAIR targets. Implementation of the new electrodes, initially planned for 2019, will require re-adaption of the RFQ cavity rf-parameters by re-shaping the stems that keep the electrodes. However, during the beam time 2018 the existing RFQ did not reach its nominal voltage most likely due to expired lifetime of the electrodes originating from 2009. In order to shorten the RFQ maintenance period and to minimize any risk for upcoming beam time 2019, it was decided to post-pone the implementation of the new design and rather just re-producing the 2009 design electrodes. This contribution is on the re-production process as short-term solution and on the full implementation of the new design as mid-term solution. CST simulations performed at GSI assure that the resonance frequency with the new electrode geometry is recuperated through corrections of the carrier rings. The status of the exchange of the electrodes and simulations for the adaptation of the new electrode design are presented.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2019-MOPTS036
About •	paper received ※ 13 May 2019       paper accepted ※ 17 May 2019       issue date ※ 21 June 2019
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MOPTS037	Comparison Between Measurement and Simulation of a Full Scale Prototype for the Proton Injector at FAIR	940
	A. Seibel, C.M. Kleffner, K. Knie, M. Vossberg GSI, Darmstadt, Germany U. Ratzinger IAP, Frankfurt am Main, Germany
	A dedicated 68 MeV, 70 mA proton injector is required for the research program at FAIR (Facility for Antiproton and Ion Research). This 325 MHz linear injector contains a RFQ and six CH structures. The CH (Crossbar H-mode) structures are working in the H210 mode. The main acceleration of this room temperature linac will be provided by the CH structures. For the second acceleration from 11.5 MeV to 24.2 MeV a full scale prototype has been built. This structure consists of two individual CH resonators and a coupling cell. Inside the structure there are 17 tuners, they have an impact on the electric field and the frequency. For operation a flat field is required, therefore this tuners must be correctly positioned. Some series of low level tuning and frequency measurements were done to determine the size of the tuners. Low level measurements and simulations will be compared and presented.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2019-MOPTS037
About •	paper received ※ 14 May 2019       paper accepted ※ 23 May 2019       issue date ※ 21 June 2019
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MOPTS042	Hardware Commissioning of the Renovated PIAVE Injector at INFN-LNL	949
	G. Bisoffi, L. Bellan, J. Bermudez, E. Bissiato, D. Bortolato, F. Chiurlotto, M. Comunian, T. Contran, A. Facco, E. Fagotti, P. Francescon, A. Friso, A. Galatà, C.S. Gallo, M.G. Giacchini, M. Lollo, D. Martini, M.O. Miglioranza, P. Modanese, M. Montis, E. Munaron, G. Nigrelli, S. Pavinato, M. Pengo, A. Pisent, M. Poggi, L. Pranovi, M. Rossignoli, D. Scarpa INFN/LNL, Legnaro (PD), Italy V. Andreev ITEP, Moscow, Russia M.A. Bellato INFN- Sez. di Padova, Padova, Italy
	During 2018, the PIAVE superconducting linac injector at INFN-LNL, based on superconducting RFQs and two cryomodules with quarter wave resonators, underwent a renovation plan. This operation was strictly related to the one carried out on ALPI [1], which will become a post-accelerator for both stable and exotic beams in a near future. PIAVE Quarter Wave Resonator (QWR) cryomod-ules, in operation since 2006, were moved to ALPI to be used for the acceleration of both stable beams and future exotic beams delivered from the cyclotron target-ion-source station, after appropriate purification, charge breeding and pre-acceleration stages. In order to cope with the removal of the two QWR cryomodules in PIAVE, a newly designed 80 MHz room temperature buncher was designed, built and tested: the buncher is required so as to match the longitudinal phase space between PIAVE su-perconducting RFQs (SRFQ1 and SRFQ2) and ALPI. In the same period, substantial refurbishments on the ECR ion source platform were carried out, in particular on its infrastructure and safety equipment. A problem on an electronic component on SRFQ2, though quickly fixed, delayed beam commissioning of the PIAVE injector, which will start at the end of May 2019.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2019-MOPTS042
About •	paper received ※ 30 April 2019       paper accepted ※ 20 May 2019       issue date ※ 21 June 2019
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MOPTS043	ESS Related Activities at Elettra Sincrotrone Trieste	953
	A. Fabris, D. Caiazza, D. Castronovo, M. Cautero, S. Cleva, R. De Monte, R. Fabris, M. Ferianis, A. Gubertini, T.N. Gucin, R. Laghi, G. Loda, C. Pasotti, R. Visintini, S. Grulja Elettra-Sincrotrone Trieste S.C.p.A., Basovizza, Italy
	Elettra Sincrotrone Trieste Research Center (Elettra) is one the Italian Institutions, together with Istituto Nazionale di Fisica Nucleare (INFN) and Consiglio Nazionale delle Ricerche (CNR), committed to the realization of the Italian in-kind contributions for the European Spallation Source. Elettra contributions are concentrated on the proton accelerator and more specifically they concern the construction of the conventional iron-dominated electro-magnets and related power converters to be installed in the superconducting part of the linac and in the High Energy Beam Transport (HEBT), the RF power stations for the superconducting spoke cavity linac section and the wire scanner acquisition system for the beam diagnostics. This paper provides a description of the contributions and an overview of the status of the construction activities.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2019-MOPTS043
About •	paper received ※ 13 May 2019       paper accepted ※ 20 May 2019       issue date ※ 21 June 2019
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MOPTS046	Upgrade of the 3-MeV LINAC for Testing of Accelerator Components at J-PARC	960
	Y. Kondo, K. Hirano, T. Ito, N. Kikuzawa, R. Kitamura, T. Morishita, H. Oguri, K. Ohkoshi, S. Shinozaki, K. Shinto JAEA/J-PARC, Tokai-mura, Japan Z. Fang, Y. Fukui, K. Futatsukawa, K. Ikegami, T. Miyao, K. Nanmo, M. Otani, T. Shibata KEK, Ibaraki, Japan T. Hori, Y. Nemoto, Y. Sato Nippon Advanced Technology Co., Ltd., Tokai, Japan T. Ishiyama, Y. Sawabe Mitsubishi Electric System & Service Co., Ltd, Tsukuba, Japan Y. Ito Total Saport System Corp., Naka-gun, Ibaraki, Japan Y. Kato Total Support Systems Corporation, Tokai-mura, Naka-gun, Ibaraki, Japan F. Kobayashi ULVAC Human Relations, Ltd., Kanagawa, Japan D. Takahashi, R. Tasaki KIS, Ibaraki, Japan
	We are now upgrading a 3-MeV linac at J-PARC. The old 30-mA RFQ is replaced by a spare one of the J-PARC 50-mA RFQ. The ion source is same as the J-PARC linac’s, therefore, the peak beam current is upgraded from 30 mA to 50 mA. This 3-MeV linac will be used for development of various accelerator components, such as beam dyagnostics devices, laser charge exchange equipments, new MEBT buncher, and so on. In this paper, present status of this 3-MeV test linac is presented.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2019-MOPTS046
About •	paper received ※ 30 April 2019       paper accepted ※ 23 May 2019       issue date ※ 21 June 2019
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MOPTS047	Radiation Measurement in the 1st Beam Commissioning Campaign of the LIPAc RFQ	964
	K. Kondo, S. Kwon, K. Sakamoto, T. Shinya, M. Sugimoto QST, Aomori, Japan L. Bellan, F. Grespan, F. Scantamburlo INFN/LNL, Legnaro (PD), Italy P. Cara IFMIF/EVEDA, Rokkasho, Japan H. Dzitko F4E, Germany R. Heidinger Fusion for Energy, Garching, Germany I. Podadera CIEMAT, Madrid, Spain
	The 1st proton beam acceleration of the Linear IFMIF Prototype Accelerator (LIPAc) through its novel RFQ was succeeded on 13th June 2018. Addition to plenty of beam diagnostics equipped in the beam line, we prepared some radiation detectors placed around the accelerator in order to acquire supplemental information of the beam, as an indirect measurement. In the first day of the beam injec-tion to the RFQ, the gamma-rays corresponding to certain excited states of Al of the low power beam dump were successfully detected by a LaBr3(Ce) scintillation detec-tor. Some neutrons, which would originate from the inter-action of protons with Cu somewhere, were also ob-served. These results proved that the beam was certainly accelerated up to about 2.5 MeV, and provided us a defin-itive confidence that the RFQ was working appropriately from the very beginning of the commissioning. Also, the comparison of the radiation yields with the RFQ trans-mission provided additional information on the beam energy distribution.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2019-MOPTS047
About •	paper received ※ 23 May 2019       paper accepted ※ 24 May 2019       issue date ※ 21 June 2019
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MOPTS048	Longitudinal Measurements and Beam Tuning in the J-PARC Linac MEBT1	968
	M. Otani J-PARC, KEK & JAEA, Ibaraki-ken, Japan K. Futatsukawa, T. Miyao KEK, Ibaraki, Japan K. Hirano, Y. Kondo, A. Miura, H. Oguri JAEA/J-PARC, Tokai-mura, Japan Y. Liu KEK/JAEA, Ibaraki-Ken, Japan
	J-PARC linac is operated with design peak current of 50 mA from October 2018. Recently we succeeded in establishing longitudinal measurement at MEBT1, with which the beam matching is being studied in MEBT1. In this poster, recent measurements and beam tuning results in MEBT1 will be presented.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2019-MOPTS048
About •	paper received ※ 30 April 2019       paper accepted ※ 20 May 2019       issue date ※ 21 June 2019
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MOPTS049	The First Replacement of the RF Window of the ACS Cavity	971
	J. Tamura, Y. Kondo, T. Morishita JAEA/J-PARC, Tokai-mura, Japan F. Naito, M. Otani KEK, Tokai, Ibaraki, Japan Y. Nemoto Nippon Advanced Technology Co., Ltd., Tokai, Japan
	In 2013, the Annular-ring Coupled Structure (ACS) cavities were installed to the Japan Proton Accelerator Research Complex (J-PARC) linac. Since then, the ACS cavities have been stably running. Although any serious problem induced by the ACS RF window has not yet observed, we decided to replace the RF window of one ACS cavity, which is the eighteenth accelerating cavity in the order of beam energy (ACS18), by the newly manufactured one. The major motivations of the replacement are to check the surface condition of the RF window which have been under operation for nearly five years and to confirm the availability of the newly manufactured RF window. By making use of the summer maintenance period of 2018, we carried out the replacement. This was the first experience for us to replace the RF window installed to the ACS cavity in the linac accelerator tunnel. As for the removed RF window, there was no any abnormal warning found with the visual examination. At the starting up of the cavity’s operation after the maintenance period, we investigated how much time would be required for an RF conditioning. It took around fifty hours so that the peak RF power including the beam loading is stably input to the cavity through the new RF window. The ACS cavity with the new RF window is now stably operating.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2019-MOPTS049
About •	paper received ※ 01 May 2019       paper accepted ※ 20 May 2019       issue date ※ 21 June 2019
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MOPTS050	VSWR Adjustment for ACS Cavity in J-PARC LINAC	974
	J. Tamura, Y. Kondo, T. Morishita JAEA/J-PARC, Tokai-mura, Japan F. Naito, M. Otani KEK, Tokai, Ibaraki, Japan Y. Nemoto Nippon Advanced Technology Co., Ltd., Tokai, Japan
	In the Japan Proton Accelerator Research Complex (J-PARC) linac, negative hydrogen beams are accelerated from 190 MeV to 400 MeV by twenty-one Annular-ring Coupled Structure (ACS) accelerating cavities. The input coupler of the ACS high-beta cavity, which is the 21st accelerating cavity (ACS21) in the order of beam acceleration, had a comparatively larger value of the Voltage Standing Wave Ratio (VSWR) than those of the other ACS cavities. To adjust the VSWR of the ACS21, we designed and fabricated a rectangular waveguide with a capacitive iris which conduces to a better matching between the cavity and the waveguide. In the 2018 summer maintenance period, we installed the newly fabricated waveguide to the ACS21 in the position between the input coupler and the RF window. Consequently, the VSWR of the ACS21 was successfully decreased to the target value which leads to the critical coupling under the nominal accelerating condition with 50-mA peak beam current.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2019-MOPTS050
About •	paper received ※ 01 May 2019       paper accepted ※ 18 May 2019       issue date ※ 21 June 2019
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MOPTS051	Lattice Design for 5MeV-125mA CW RFQ Operation in the LIPAc	977
	Y. Shimosaki, A. Kasugai, K. Kondo, K. Sakamoto, M. Sugimoto QST, Aomori, Japan L. Bellan, M. Comunian, E. Fagotti, A. Pisent INFN/LNL, Legnaro (PD), Italy B. Brañas Lasala, C. Oliver, I. Podadera CIEMAT, Madrid, Spain P. Cara IFMIF/EVEDA, Rokkasho, Japan N. Chauvin CEA-IRFU, Gif-sur-Yvette, France G. Duglue, H. Dzitko F4E, Germany R. Heidinger Fusion for Energy, Garching, Germany H. Kobayashi, K. Takayama KEK, Ibaraki, Japan
	The installation and commissioning of the LIPAc are ongoing under the Broader Approach agreement, which is the prototype accelerator of the IFMIF for proof of princi-ple and design. The deuteron beam will be accelerated by the RFQ linac from 100 keV to 5 MeV during the com-missioning phase-B and by the SRF linac up to 9 MeV during the phase-C. The commissioning phase-B+ will be implemented between phase-B and C to complete the engineering validation of the RFQ linac before installing the SRF linac. The lattice for the deuteron beam of 5 MeV and 125 mA at the commissioning phase-B+ was designed.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2019-MOPTS051
About •	paper received ※ 15 May 2019       paper accepted ※ 23 May 2019       issue date ※ 21 June 2019
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MOPTS056	Optimization of SC Cavity Type for CSNS Linac Upgrade	987
	Y. Wang, M.X. Fan, A.H. Li, B. Li, P.H. Qu IHEP CSNS, Guangdong Province, People’s Republic of China J.P. Dai, H.C. Liu, P. Sha IHEP, Beijing, People’s Republic of China X.L. Wu DNSC, Dongguan, People’s Republic of China
	In order to increase CSNS beam power from 100kW to 500kW, the Linac injection energy need to be increased from 80MeV to 300MeV. The combined layout of superconducting spoke cavities and elliptical cavities will be adopted to accelerate H− beam to 300MeV. Two operation frequency of spoke cavities were compared with single and double spoke structure, a compact 648MHz βg=0.4 single spoke cavity was proposed, and the RF performance was presented, as well as the MP behavior.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2019-MOPTS056
About •	paper received ※ 09 May 2019       paper accepted ※ 20 May 2019       issue date ※ 21 June 2019
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MOPTS057	SSPA upgrade plan design for CiADS	990
	Q. Chen, Z. Gao, Y. He, G. Huang, R. Huang, T.C. Jiang, S.H. Liu, L.P. Sun, X.W. Wang, Z.J. Wang, W.M. Yue IMP/CAS, Lanzhou, People’s Republic of China
	Funding: Supported by the National natural science foundation of China (Grand No. 11525523 and 91426303) For ADS application, both research and commercial facilities requires extremely large amount of RF power to drive several mega watts beam power, so proper RF power upgrade plan can reduce the budget per phase and increase the valuable experience in engineering. CiADS (China initiative Accelerator Drive System) proposes to employ SSPA (Solid State Power Amplifier) as RF power source for flexible configuring and upgrading in the future. In this paper, from an engineering point of view, it is acceptable if proper matching beam current was selected for adopting fixed-coupling input coupler while only sacrificed some RF power during the upgrade plan. SSPA upgrade plan start with the stablility requirement to determine bandwidth, then combined with other RF power requirements to select output level, finally, checking how much the surplus of selected level SSPA for detuning control. The calculation and evaluation results for a §I{545}{MeV} physical design lattice illustrate that some resonance cavities had very limited surplus RF power left for detuning control that provided necessary optimization direction and guidelines for both physical design and SSPA arrangement.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2019-MOPTS057
About •	paper received ※ 30 April 2019       paper accepted ※ 20 May 2019       issue date ※ 21 June 2019
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MOPTS059	The Status of CiADS Superconducting LINAC	994
	Z.J. Wang, Y. He, G. Huang, S.H. Liu, T. Tan, Y.Q. Wan, F.F. Wang, W.M. Yue IMP/CAS, Lanzhou, People’s Republic of China
	CiADS (China initiative Accelerator Driven System) approved by Chinese government at 2016 aims to build the first ADS experimental facility to demonstrate the nuclear waste transmutation. The CiADS driving linac can accelerate 5 mA proton beam to 500 MeV at the beam power up to 2.5 MW with the state-of-the-art accelerator technologies. The challenging programs include beam loss control-oriented physics design, high performance CW operated superconducting cavities, SRF cryomod-ules, and highly efficient RF amplifier system. As the driving linac of the ADS system, the RAMI characters will serve as the design philosophy to guide the physics design and the choice of technical routes. The physics design and key technologies of the high-power machine are descried in the paper.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2019-MOPTS059
About •	paper received ※ 14 May 2019       paper accepted ※ 24 May 2019       issue date ※ 21 June 2019
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MOPTS063	Design and Low Power Test of a Prototype HOM LINAC	1001
	L. Lu, T. He, C.C. Xing, L. Yang IMP/CAS, Lanzhou, People’s Republic of China L. Yang University of Chinese Academy of Sciences, Beijing, People’s Republic of China
	A 325MHz HOM (higher order mode) type linac was proposed and studied for proton or heavy ion acceleration in medium energy region. The cavity was finished the fabrication already by using copper and aluminum material. We will report results of low power test of the HOM linac in this paper.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2019-MOPTS063
About •	paper received ※ 29 April 2019       paper accepted ※ 23 May 2019       issue date ※ 21 June 2019
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MOPTS072	RF DESIGN OF AN 81.25 MHz BENT-VANE TYPE RFQ	1015
SUSPFO078	use link to see paper's listing under its alternate paper code
	L. Yang, T. He, Y. He, L. Lu, C.C. Xing, L. Yang IMP/CAS, Lanzhou, People’s Republic of China A.H. Li IHEP, Beijing, People’s Republic of China
	The bent-vane type RFQ is proposed at IMP, Chinese Academy of Sciences, which can downsize cross section and has the simple cooling system in low frequency field. The vanes of the four-vane type RFQ are bent to form the new RFQ structure. In order to research its RF properties, the prototype cavity of an 81.25 MHZ bent-vane type RFQ is designed. This paper presents the preliminary RF design of the prototype cavity.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2019-MOPTS072
About •	paper received ※ 17 May 2019       paper accepted ※ 20 May 2019       issue date ※ 21 June 2019
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MOPTS075	Design and Experiment of a Window-Type CW Deuteron RFQ	1021
	K. Zhu, M.J. Easton, P.P. Gan, S.L. Gao, H.P. Li, S. Liu, Y.R. Lu, Q.Y. Tan, L. Tao, Z. Wang PKU, Beijing, People’s Republic of China W.P. Dou, Y. He, C. Wang, Q. Wu, H.W. Zhao IMP/CAS, Lanzhou, People’s Republic of China
	A deutron CW RFQ was designed and fabricated in Peking University. It will accelerate 50mA CW deutron beam from 50keV to 1MeV at 162.5MHz. The novel structure of four-vane with window was used to seperate the dipole mode from the working mode. The field tuning of this RFQ was different from conventional four vane RFQ because that the four quadrants of RFQ cavity were coupled. The discipline of field tuning was studied by simulation and experiment. The beam dynamics of the RFQ was designed by equipartation and matching method, limit current effect was considered at the same time. The final design result of the RFQ was: voltage between electrodes was 60kV, transport efficiency of RFQ is 98%, field unflatness is less than 2% after tuning, the deformation of RFQcavity is less than 80um. Only 47 hours was spent to increase CW power of cavity from 0 to 55kW in high power test and The RFQ can working stable at the design voltage. The preliminary H2+ beam exeperiment has been done and 1.78mA CW beam was obtained at exit of RFQ. This paper will introduce the detail of design and experiment of the RFQ.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2019-MOPTS075
About •	paper received ※ 22 May 2019       paper accepted ※ 24 May 2019       issue date ※ 21 June 2019
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MOPTS077	RCCS Operation and Characteristics in Resonance Frequency Control Mode at KOMAC	1025
	K.H. Kim, H.S. Jeong, H.S. Kim, S.G. Kim, H.-J. Kwon, Y.G. Song Korea Atomic Energy Research Institute (KAERI), Gyeongbuk, Republic of Korea
	Funding: This work has been supported through KOMAC (Korea Multi-purpose Accelerator Complex) operation fund of KAERI by MSIT (Ministry of Science and ICT) A 100-MeV proton accelerator is under operation at Korea Multi-purpose Accelerator Complex (KOMAC). The resonance control cooling system (RCCS) has supplied the cooling water to drift tube linac (DTL). The DTL need to keep the resonant frequency of 350MHz during the operation. RCCS has a critical role in sustaining the acceptable resonant frequency error in DTL by adopting the resonance frequency control mode. Details on the RCCS operation in resonance frequency control mode will be given in this study.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2019-MOPTS077
About •	paper received ※ 15 May 2019       paper accepted ※ 20 May 2019       issue date ※ 21 June 2019
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MOPTS080	Status and Installation Plan of RISP RFQ at Project Site	1031
	B.-S. Park, I.S. Hong IBS, Daejeon, Republic of Korea
	Funding: Supported by the Rare Isotope Science Project of Institute for Basic Science funded by the Ministry of Science, ICT (MSIP) and the National Research Foundation (NRF) of Korea (2013M7A1A1075764). The Rare Isotope Science Project (RISP) at Institute for Basic Science (IBS) has been developed a Radio Frequency Quadrupole(RFQ), which was fabricated and commissioned at the off-site test facility. An O+7 beam was accelerated from 10keV/u to 516keV/u as a preliminary beam test. For CW and high power operation, RF conditioning test was also conducted. The RISP RFQ is 5 meters long, 1 meter in diameter and weighs about 16 tons. It was disassembled and transported to the project site, Sin-dong, for installation as the injector system. The installation commenced in April 2019 and the commissioning of the injector system is expected to begin in early 2020. In this paper, the installation status and plans were summarized.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2019-MOPTS080
About •	paper received ※ 15 May 2019       paper accepted ※ 18 May 2019       issue date ※ 21 June 2019
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MOPTS083	Beam Dynamics Simulation with an Updated Model for the ESS Ion Source and Low Energy Beam Transport	1042
	E. Nilsson, M. Eshraqi, J.F. Esteban Müller, Y. Levinsen, N. Milas, R. Miyamoto ESS, Lund, Sweden
	Beam dynamics simulation of the ion source (IS) and low energy beam transport (LEBT) of the European Spallation Source (ESS) Linac is conducted with TraceWin and IBSimu code. TraceWin allows multi-particle tracking based on a particle-in-cell space-charge solver and is the standard simulation tool of the whole ESS Linac. IBSimu is based on a Vlasov solver and allows to simulate beam extraction from plasma as well as the beam transport in the LEBT. In preparation for beam commissioning of the IS and LEBT in the ESS Linac tunnel, which started in September 2018 and is ongoing as of the timing of writing this paper, the simulation models of the IS and LEBT in these two codes were updated. This paper reports the effort for these updates, including the beam distribution out of the IS, electromagnetic field map of the LEBT solenoid, more realistic aperture structure in the LEBT, as well as updated LEBT solenoids scan simulation.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2019-MOPTS083
About •	paper received ※ 17 May 2019       paper accepted ※ 18 May 2019       issue date ※ 21 June 2019
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MOPTS084	ESS Low Energy Beam Transport Tuning During the First Beam Commissioning Stage	1046
	R. Miyamoto, C.S. Derrez, E. Laface, Y. Levinsen, N. Milas, A.G. Sosa, R. Tarkeshian, C.A. Thomas ESS, Lund, Sweden
	Beam commissioning of the ion source (IS) and low energy beam transport (LEBT) of the European Spallation Source is ongoing on its site as of writing this paper and continues until June 2019. The LEBT consists of two solenoids with integrated dipole correctors to steer, focus, and match the high current divergent beam out of the IS to the following radio frequency quadrupole (RFQ). It is also equipped with a suite of diagnostics devices to provide a full characterization of the beam for achieving a good transport within the LEBT, optimizing the matching to the RFQ, and also providing references to numerical simulations. This paper presents results of beam characterization campaign from the ongoing beam commissioning period, including the matching at the RFQ interface based on emittance sampling for varied strengths of the solenoids and verification of the linear model for the trajectory and beam envelope.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2019-MOPTS084
About •	paper received ※ 21 May 2019       paper accepted ※ 22 May 2019       issue date ※ 21 June 2019
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MOPTS096	Linac4: Reliability Run Results and Source Extraction Studies	1090
	D. Noll, G. Bellodi, S.B. Bertolo, F.D.L. Di Lorenzo, J.-B. Lallement, J. Lettry, A.M. Lombardi, C.M. Mastrostefano, B. Mikulec, M. O’Neil, S. Schuh, R. Wegner CERN, Meyrin, Switzerland
	Linac4, a 160 MeV, 352.2 MHz linear accelerator, has been fully commissioned and will take its place as new injector to the CERN chain of accelerators during the long shutdown (LS2) in 2019-2020. In the past year, it has been continuously providing beam during a test run to assess its reliability in view of the connection to the LHC injector chain. The target reliability of more than 90% has been demonstrated during the accumulated nine months of run in 2017 and 2018. The beam quality at 160 MeV is suitable for producing all beams for the CERN physics program of today. Nevertheless, the limited peak current of 30mA might be a limitation for future high intensity programs. The bottleneck has been identified at the low energy end of the accelerator. In the meantime, beam extraction and low energy beam transport studies are ongoing at a dedicated test stand with the goal to reach beam currents from the pre-injector up to 45 mA. We will present the status of the modelling of the pre-injector and possible solutions to reach higher beam currents from the RFQ along with results from the reliability run.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2019-MOPTS096
About •	paper received ※ 30 April 2019       paper accepted ※ 19 May 2019       issue date ※ 21 June 2019
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MOPTS103	First Results of Beam Commissioning on the ESS Site for the Ion Source and Low Energy Beam Transport	1118
	R. Miyamoto, R.E. Bebb, E.C. Bergman, B. Bertrand, H. Danared, C.S. Derrez, E.M. Donegani, M. Eshraqi, J.F. Esteban Müller, T. Fay, V. Grishin, B. Gålnander, S. Haghtalab, H. Hassanzadegan, A. Jansson, H. Kocevar, E. Laface, Y. Levinsen, M. Mansouri, C.A. Martins, J.P.S. Martins, N. Milas, M. Muñoz, E. Nilsson, D.C. Plostinar, C. Rosati, T.J. Shea, A.G. Sosa, R. Tarkeshian, L. Tchelidze, C.A. Thomas, P.L. van Velze ESS, Lund, Sweden I. Bergstrom CERN, Meyrin, Switzerland L. Celona, L. Neri INFN/LNS, Catania, Italy
	The European Spallation Source (ESS), currently under construction in Lund, Sweden, will be a spallation neutron source driven by a proton linac of an unprecedented 5 MW beam power. Such a high power requires its ion source (IS) to produce proton beam pulses at 14 Hz with a high peak current more than 62.5 mA and a long plateau up to §I{3}{ms}. The IS and the following low energy beam transport (LEBT) section were manufactured and tested with beam to meet ESS requirements at INFN-LNS and delivered to ESS towards the end of 2017. Beam commissioning of these two sections on the ESS site has started in September 2018 and will continue until the end of June 2019. This paper provides an overview on this first beam commissioning period at ESS and also presents results of IS characterization and testing on LEBT functionalities.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2019-MOPTS103
About •	paper received ※ 20 May 2019       paper accepted ※ 23 May 2019       issue date ※ 21 June 2019
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MOPTS110	FLUKA-MARS15 Simulations To Optimize the Fermilab PIP-II Movable Beam Absorber	1136
	L. Lari, F.G. Garcia, Y. He, I. Kourbanis, N.V. Mokhov, E. Pozdeyev, I.L. Rakhno Fermilab, Batavia, Illinois, USA F. Cerutti, L.S. Esposito, L. Lari CERN, Meyrin, Switzerland
	PIP-II is the Fermilab’s flagship project to provide powerful, high-intensity proton beams to the laboratory’s experiments. The heart of the PIP-II project is an H− 800 MeV superconducting linear accelerator. In order to commission the beam and operate safely the linac, several constraints were evaluated. The design of a movable 5 kW beam absorber was finalized to allow staged beam commissioning in different linac locations. Prompt and residual radiation levels were calculated, and radiation shields were optimized to keep those values within the acceptable levels in the areas surrounding beam absorber. Monte Carlo calculations with FLUKA and MARS15 codes are presented in the paper to support these studies.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2019-MOPTS110
About •	paper received ※ 14 May 2019       paper accepted ※ 20 May 2019       issue date ※ 21 June 2019
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MOPTS111	Primary Beam Dynamics Design of a Heavy-Ion IH-DTL With Electromagnetic Quadrupoles	1140
	P.F. Ma, X. Guan, R. Tang, X.W. Wang, Q.Z. Xing, X.D. Yu, S.X. Zheng TUB, Beijing, People’s Republic of China
	A new IH-DTL beam dynamics scheme, IH-EMQ (ElectroMagnetic Quadrupole) is presented to obtain a large longitudinal acceptance. In this scheme, electromagnetic quadrupoles are installed inside the drift tubes of IH-DTL. A large-longitudinal-acceptance heavy-ion IH-DTL design is described in this paper. With the limit current of 25 mA, the 90% normalized longitudinal acceptance reaches 87.8 pi.deg. MeV for the 60 MeV 107Au30+, which is 8 times of the input emittance.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2019-MOPTS111
About •	paper received ※ 09 April 2019       paper accepted ※ 17 May 2019       issue date ※ 21 June 2019
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MOPTS114	Upgrades for Subsystems of the 200 MeV H− Linac at BNL	1152
	D. Raparia, G. Atoian, D.M. Gassner, D. Goldberg, O. Gould, T. Lehn, V. LoDestro, M. Mapes, M. Mapes, I. Marneris, S. Polizzo, J. Ritter, A. Zaltsman, A. Zelenski BNL, Upton, Long Island, New York, USA
	Funding: Work supported by Brookhaven Science Associates, LLC under Contract No. DE-AC02-98CH10886 with the U.S. Department of Energy. To increase the average current for isotope production by factor of two, we have undertaken several upgrades for our 50-year-old 200 MeV H− linac. Average current will be double by increasing the beam pulse length. We are testing the DTL tanks reliability by increasing RF pulse length and replacing weak RF joints. We are in the process of replace 50-year old ion pumps and a new PLC based vacuum I&C system for the DTL tanks. We are also upgrading/replacing/adding LLRF, diagnostics, machine protection system, and quadrupole power supply. Paper will present status of these activity and future plan.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2019-MOPTS114
About •	paper received ※ 15 May 2019       paper accepted ※ 23 May 2019       issue date ※ 21 June 2019
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MOPTS118	3D Electromagnetic/PIC Simulations for a Novel RFQ/RFI Linac Design	1158
	S.J. Smith, S. Biedron, A.M.N. Elfrgani, E. Schamiloglu, S.I. Sosa Guitron University of New Mexico, Albuquerque, USA P.G. Bethoney, M.S. Curtin, B. Hartman, T. Pressnall, D.A. Swenson Ion Linac Systems, Inc., Albuquerque, USA T.B. Bolin Element Aero, Chicago, USA J.R. Cary, D.M. Cheatham Tech-X, Boulder, Colorado, USA
	Funding: This work was supported by Ion Linac Systems, Albuquerque, NM. Using the commercial software VSim 9, a highly parallelized particle-in-cell/finite difference time-domain modeling code, the performance of an existing novel RFQ/RFI linac structure designed by Ion Linac Systems is evaluated. This effort is aimed towards having an up to date full 3D start-to-end simulation of the accelerator system, which does not exist currently. The structure used is an efficient 200-MHz, 2.5-MeV, CW-RFQ/RFI proton linac. The methods employed in VSim for modelling and parameter setup are presented, along with the simulation procedures for both the Electromagnetic and PIC solver. The important figures of merit for the structure are given including the Q-factor, field distributions, shunt impedance, and important beam properties. These are then contrasted with the initial design values and analytical calculations.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2019-MOPTS118
About •	paper received ※ 15 May 2019       paper accepted ※ 21 May 2019       issue date ※ 21 June 2019
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MOPTS120	Commissioning of the New Experimental FODO Line at the SNS Beam Test Facility	1164
	A.V. Aleksandrov, S.M. Cousineau, K.J. Ruisard, V. Tzoganis, A.P. Zhukov ORNL, Oak Ridge, Tennessee, USA Z.L. Zhang UTK, Knoxville, Tennessee, USA
	The SNS Beam Test Facility consists of a 2.5MeV proton accelerator and a beam line with various diagnostics for high intensity beam dynamics study. A FODO line consisting of 19 quadrupole magnets and a large dynamic range emittance monitor has been added recently. The new setup is design for experimental study of mechanisms of halo formation in mismatched high intensity beams. We present results of the new beam line commissioning with beam.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2019-MOPTS120
About •	paper received ※ 07 May 2019       paper accepted ※ 21 May 2019       issue date ※ 21 June 2019
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WEPTS118	Results of CEA Tests of SARAF Couplers Prototypes	3382
	G. Ferrand, Y. Baron, S. Bouaziz, D. Chirpaz-Cerbat, R. Cubizolles, F. Gohier, S. Ladegaillerie, A. Lotode, C. Madec, G. Monnereau, N. Pichoff, O. Piquet CEA-IRFU, Gif-sur-Yvette, France C. Boulch, E. Fayette, P. Guiho, Y. Lussignol, C. Servouin CEA-DRF-IRFU, France
	CEA is committed to delivering a Medium Energy Beam Transfer line and a superconducting linac (SCL) for SARAF accelerator in order to accelerate 5 mA beam of either protons from 1.3 MeV to 35 MeV or deuterons from 2.6 MeV to 40 MeV. The SCL consists in 4 cryomodules. The first two cryomodules host 6 and 7 half-wave resonator (HWR) low beta cavities (β = 0.09) at 176 MHz. The last two identical cryomodule will host 7 HWR high-beta cavities (β = 0.18) at 176 MHz. The maximal required power to be transmitted to the beam is 11.4 kW for high-beta cavity couplers. This document presents the results of the coupler tests and conditioning.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2019-WEPTS118
About •	paper received ※ 23 April 2019       paper accepted ※ 22 May 2019       issue date ※ 21 June 2019
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THPTS116	The SARAF-LINAC Project 2019 Status	4352
	N. Pichoff, R.D. Duperrier, G. Ferrand, B. Gastineau, F. Gougnaud, M. Jacquemet, C. Madec, O. Piquet, Th. Plaisant, F. Senée, D. Uriot CEA-IRFU, Gif-sur-Yvette, France D. Berkovits, J. Luner, A. Perry, E. Reinfeld Soreq NRC, Yavne, Israel
	SNRC and CEA collaborate to the upgrade of the SARAF accelerator to 5 mA CW 40 MeV deuteron and proton beams (Phase 2). CEA is in charge of the design, construction and commissioning of the MEBT line and the superconducting linac (SARAF-LINAC Project). The prototypes of the 176 MHz NC rebuncher, SC cavities, RF coupler and SC solenoid-Package have been tested recently. Meanwhile, the cryomodules technical specifications have been written and called for tender. This paper presents the status of the SARAF-LINAC Project at April 2019.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2019-THPTS116
About •	paper received ※ 13 May 2019       paper accepted ※ 22 May 2019       issue date ※ 21 June 2019
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THPTS117	Results of CEA Tests of SARAF Cavities Prototypes	4356
	G. Ferrand, G. Jullien, S. Ladegaillerie, F. Leseigneur, C. Madec, N. Misiara, N. Pichoff, O. Piquet, L. Zhao CEA-IRFU, Gif-sur-Yvette, France P. Carbonnier, F. Éozénou, E. Fayette, L. Maurice, C. Servouin CEA-DRF-IRFU, France A. Pérolat CEA, Gif-sur-Yvette, France
	CEA is committed to delivering a Medium Energy Beam Transfer line and a superconducting linac (SCL) for SARAF accelerator in order to accelerate 5mA beam of either protons to 35 MeV or deuterons to 40 MeV. The SCL consists in 4 cryomodules. The first two cryomodules host 6 & 7 half-wave resonator (HWR) low beta cavities (β = 0.09) at 176 MHz, and the last two crymodules host 7 HWR medium beta cavities (β = 0.18). The low beta prototype was qualified, the medium beta is being qualified. The results of the RF tests will be presented in this poster.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2019-THPTS117
About •	paper received ※ 23 April 2019       paper accepted ※ 23 May 2019       issue date ※ 21 June 2019
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