HB2018 - Classification: Commissioning and Operations

Paper	Title	Page
TUA1WD01	ESS Commissioning Plans	127
	N. Milas, R. De Prisco, M. Eshraqi, Y. Levinsen, R. Miyamoto, M. Muñoz, D.C. Plostinar ESS, Lund, Sweden
	The ESS linac is currently under construction in Lund, Sweden, and once completed it will deliver an unprecedented 5 MW of average power. The ion source and LEBT commissioning starts in 2018 and will continue with the RFQ, MEBT and the first DTL tank next year and up to the end of the fourth DTL tank in 2020. This paper will summarize the commissioning plans for the normal conducting linac with focus on the ion source and LEBT and application development for both commissioning and operation.
	Slides TUA1WD01 [1.552 MB]
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TUA1WD02	KOMAC Operation and Future Plans
	Y.-S. Cho KAERI, Daejon, Republic of Korea
	This talk is about KOMAC operation and future plans.
	Slides TUA1WD02 [7.375 MB]
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TUA1WD03	Commissioning Status and Plans of CSNS/RCS	133
	S.Y. Xu, Y.W. An, J. Chen, M.Y. Huang, H.F. Ji, Y. Li, S. Wang IHEP, Beijing, People's Republic of China X.H. Lu CSNS, Guangdong Province, People's Republic of China
	The China Spallation Neutron Source (CSNS) is an accelerator-based science facility. CSNS is designed to accelerate proton beam pulses to 1.6 GeV kinetic energy, striking a solid metal target to produce spallation neutrons. CSNS has two major accelerator systems, a linear accelerator (80 MeV Linac) and a 1.6 GeV rapid cycling synchrotron (RCS). The Beam commissioning of CSNS has been commissioned recently. Beam had been accelerated to 61 MeV at CSNS/Linac on April 24, 2017, and 1.6 GeV acceleration at CSNS/RCS was successfully accomplished on July 7, 2017 with the injection energy of 61 MeV. Beam had been accelerated to 80 MeV at CSNS/Linac on January 6, 2018, and 1.6 GeV acceleration at CSNS/RCS was successfully accomplished on January 18, 2018 with the injection energy of 80 MeV. The initial machine parameter tuning and various beam studies were completed. In this paper, the commissioning experiences are introduced.
	Slides TUA1WD03 [10.794 MB]
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TUA1WD04	High Intensity Proton Stacking at Fermilab: 700 kW Running	136
	R. Ainsworth, P. Adamson, B.C. Brown, D. Capista, K.J. Hazelwood, I. Kourbanis, D.K. Morris, M. Xiao, M.-J. Yang Fermilab, Batavia, Illinois, USA
	As part of the Nova upgrades in 2012, the Recycler was repurposed as proton stacker for the Main Injector with the aim to deliver 700 kW. Since January 2017, this design power has been run routinely. The steps taken to commission the Recycler and run at 700 kW operationally will be discussed as well as plans for future running.
	Slides TUA1WD04 [62.832 MB]
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TUA2WD01	FAIR Commissioning - Concepts and Strategies in View of High-Intensity Operation	141
	R.J. Steinhagen GSI, Darmstadt, Germany
	The Facility for Anti-Proton and Ion Research (FAIR) presently under construction, extends and supersedes GSI's existing infrastructure. Its core challenges include the precise control of highest proton and uranium ion beam intensities, the required extreme high vacuum conditions, machine protection and activation issues while providing a high degree of multi-user mode of operation with facility reconfiguration on time-scales of a few times per week. Being based on best-practices at other laboratories, this contribution outlines the applicable hardware and beam commissioning strategies, as well as concepts, beam-based and other accelerator systems that are being tested at the existing facility in view of the prospective FAIR operation.
	Slides TUA2WD01 [10.735 MB]
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TUA2WD02	High-Power Beam Operation at J-PARC	147
	S. Igarashi KEK, Ibaraki, Japan
	The Japan Proton Accelerator Research Complex (J-PARC) is a multipurpose high-power proton accelerator facility, comprising a 400 MeV linac, a 3 GeV rapid cycling synchrotron (RCS) and a 30 GeV main ring synchrotron (MR). RCS is now providing 500 kW beams to the materials and life science experimental facility (MLF) and its beam power will be increased step by step toward the design value of 1 MW. MR has been operated with the beam power of 500 kW at maximum for the long-baseline neutrino oscillation experiment (T2K). An upgrade plan of MR for the beam power of 1.3 MW for the T2K experiment is promoted with a faster cycling scheme.
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TUA2WD03	Automated Operation of EBIS Injector at BNL	153
	T. Kanesue, E.N. Beebe, S. Binello, B.D. Coe, M.R. Costanzo, L. DeSanto, S. Ikeda, J.P. Jamilkowski, N.A. Kling, D. Lehn, C.J. Liaw, V. Lo Destro, D.R. McCafferty, J. Morris, M. Okamura, R.H. Olsen, D. Raparia, R. Schoepfer, F. Severino, L. Smart, K. Zeno BNL, Upton, Long Island, New York, USA
	The RHIC-EBIS pre-injector is a heavy ion pre-injector to deliver multiple heavy ion species at 2 MeV/u to the AGS-Booster at the RHIC accelerator complex. In addition to collider experiments at RHIC, multiple heavy ion species are used for the NASA Space Radiation Laboratory (NSRL) to evaluate the risk of radiation in space in radiobiology, physics, and engineering. A GCR simulator is one of the operation modes of NSRL to simulate a galactic cosmic ray event, which requires switching multiple ion species within a short period of time. The RHIC-EBIS pre-injector delivers various heavy ion species independently for simultaneous operation of RHIC and NSRL. We developed an automated scheme of the rapid species change and it is routinely used by NSRL or Main Control Room for daily operation without assistance of RHIC-EBIS experts. The number of species change exceeds one hundred. This paper describes the automated operation of the RHIC-EBIS pre-injector and the operational performance. This work has been supported by Brookhaven Science Associates, LLC under Contract No. DE-SC0012704 with the U.S. Department of Energy, and by the National Aeronautics and Space Administration.
	Slides TUA2WD03 [1.999 MB]
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WEP2PO017	Study on the Leakage Fields of the Septum and Lambertson Magnets during the Beam Commissioning	303
	M.Y. Huang, S. Wang, S.Y. Xu IHEP, Beijing, People's Republic of China
	For China Spallation Neutron Source (CSNS), the septum magnets are the key part of the injection system and the lambertson magnet is the key part of the extraction system. If the leakage fields of the septum and lambertson magnets are large enough, the circular beam orbit of Rapid Cycling Synchrotron (RCS) would be affected. In this paper, during the beam commissioning, the leakage fields of the septum and lambertson magnets will be studied and their effects on the circular beam orbit will be given and discussed.
	Poster WEP2PO017 [0.852 MB]
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WEP2PO022	Study on the Phase Space Painting Injection during the Beam Commissioning for CSNS	309
	M.Y. Huang, S. Wang, S.Y. Xu IHEP, Beijing, People's Republic of China
	During the beam commissioning of China Spallation Neutron Source (CSNS), different injection methods were used in different periods. In the early stage, since the precise position of the injection point was unknown and the beam power was relatively small, the fixed point injection was selected. In the later period, in order to increase the beam power and reduce the beam loss, the phase space painting method was used. In this paper, the phase space painting in the horizontal and vertical planes is studied in detail and the beam commissioning results of different painting injection are given and discussed. In addition, the different injection effects of the fixed point injection and painting injection are compared and studied.
	Poster WEP2PO022 [0.708 MB]
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WEP2PO023	Timing Adjustment of Eight Kickers and a Method to Calibrate the Kicker Current Curves During the Beam Commissioning for CSNS	312
	M.Y. Huang, D.P. Jin, L. Shen, S. Wang, S.Y. Xu, P. Zhu IHEP, Beijing, People's Republic of China
	The extraction system is a key part of the China Spallation Neutron Source (CSNS) accelerator. It consists of two kinds of magnets: eight kickers and one lambertson. During the beam commissioning, the timing adjustment of eight kickers is a very important problem. In the paper, the methods to adjust the timing of eight kickers will be studied and applied to the beam commissioning. Then, the best method to adjust the timing of eight kickers will be given and used for a long time in the future.
	Poster WEP2PO023 [1.027 MB]
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WEP2PO027	Simulation of the Axial Injection Beam Line of the Reconstructed U200 Cyclotron of FLNR JINR	319
	N.Yu. Kazarinov, J. Franko, G.G. Gulbekyan, I.A. Ivanenko, I.V. Kalagin JINR, Dubna, Moscow Region, Russia
	Flerov Laboratory of Nuclear Reaction of Joint Institute for Nuclear Research begin the works under reconstruction of the cyclotron U200. The reconstructed cyclotron is intended for acceleration of heavy ions with mass-to-charge ratio A/Z within interval from 5 to 8 up to the fixed energies 3.5 and 5.3 MeV per unit mass. The intensity of the accelerated ions will be about 3 pmcA for lighter ions (A< 40) and about 0.3 pmcA for heavier ions (A<132). The cyclotron will be used in the microchip testing, production of the track pore membranes and for applied physics. The injection into cyclotron will be realized from the external superconducting ECR ion source. The simulation of the axial injection system of the cyclotron is presented in this report.
	Poster WEP2PO027 [0.679 MB]
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WEP2PO028	Conceptual Design of FLNR JINR Radiation Facility Based on DC130 Cyclotron	324
	N.Yu. Kazarinov, P.Yu. Apel, V. Bashevoy, V. Bekhterev, S.L. Bogomolov, O.N. Borisov, J. Franko, G.G. Gulbekyan, I.A. Ivanenko, I.V. Kalagin, V.I. Mironov, S.V. Mitrofanov, V.A. Semin, V.A. Skuratov, A. Tikhomirov JINR, Dubna, Moscow Region, Russia
	Flerov Laboratory of Nuclear Reaction of Joint Institute for Nuclear Research begins the works under the conceptual design of radiation facility based on the DC130 cyclotron. The facility is intended for SEE testing of microchips, for production of track membranes and for solving of applied physics problems. The DC130 cyclotron will accelerate heavy ions with mass-to-charge ratio A/Z of the range from 5 to 8 up to fixed energies 2 and 4.5 MeV per unit mass. The intensity of the accelerated ions will be about 1 pmcA for lighter ions (A<50) and about 0.1 pmcA for heavier ions (A>50). The injection into cyclotron will be realized from the external DECRIS-SC superconducting ECR ion source. The main magnet and acceleration system of DC130 is based on the U200 cyclotron ones that now is under reconstruction. The conceptual design parameters of various systems of the cyclotron and the set of experimental beam lines are presented in this report.
	Poster WEP2PO028 [1.955 MB]
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THA1WD01	Experience and Perspective of FFAG Accelerator	342
	Y. Mori Kyoto University, Research Reactor Institute, Osaka, Japan
	Funding: This work was funded by ImPACT Program of Council for Science, Technology and Innovation (Cabinet Office, Government of Japan) This talk is about operational challenge and perspective of Fixed Field Alternating Gradient accelerators, including the recent studies on advanced FFAG for high intensity secondary particles.
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THA1WD02	SNS Operation and Upgrade Plans
	A.P. Shishlo ORNL, Oak Ridge, Tennessee, USA
	Funding: This manuscript has been authored by UT-Battelle, LLC, under Contract No. DE-AC0500OR22725 with the U.S. Department of Energy. The future power upgrade and operation parameters of the Spallation Neutron Source at Oak Ridge National Laboratory are discussed. The installation of seven additional superconducting cavities in the existing free space of the linear accelerator will increase the beam energy to 1.3 GeV. More than 95% of the installed ring and transport systems are presently capable of 1.3 GeV operation. Combination of the new beam energy and increasing the average beam current by ~50% will double the accelerator power capability to 2.8 MW. The Mercury spallation neutron target will be upgraded to a capacity of 2.0 MW beam power.
	Slides THA1WD02 [4.211 MB]
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THA1WD03	Status and Beam Power Ramp-Up Plans of the Slow Extraction Operation at J-Parc Main Ring	347
	M. Tomizawa, Y. Arakaki, T. Kimura, S. Murasugi, R. Muto, K. Okamura, Y. Shirakabe, E. Yanaoka KEK, Ibaraki, Japan
	A 30 GeV proton beam accelerated in the J-PARC Main Ring (MR) is slowly extracted by the third integer resonant extraction and delivered to the hadron experimental hall. Slow extraction from the MR has unique characteristics that can be used to obtain a low beam loss rate. Devices with electrostatic septum (ESSs) and magnetic septa are placed in the long straight section with zero dispersion. The separatrix for the resonance is independent of the momentum at the septa when the horizontal chromaticity is set to zero. The resulting beam has a large step size and small angular spread, enabling a low hit rate of the beam at the first ESS. Under these conditions, a dynamic bump scheme has been applied to reduce the beam loss further. We have attained 50 kW operation at 5.2s cycle in the latest physics run. A suppression of instability during debunch process is also essential as well as low beam loss tunings. In this paper, a current status and future plans toward a higher beam power for the slow extraction are reported. Preliminary results for a 8 GeV slow extraction test for the muon to electron conversion search experiment (COMET) will be also briefly presented.
	Slides THA1WD03 [9.174 MB]
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THA1WD04	High-Brightness Challenges for the Operation of the CERN Injector Complex	352
	K. Hanke, S.C.P. Albright, R. Alemany-Fernández, H. Bartosik, E. Chapochnikova, H. Damerau, G.P. Di Giovanni, B. Goddard, A. Huschauer, V. Kain, A. Lasheen, M. Meddahi, B. Mikulec, G. Rumolo, R. Scrivens, F. Tecker CERN, Geneva, Switzerland
	CERN's LHC injectors are delivering high-brightness proton and ion beams for the Large Hadron Collider LHC. We review the present operation modes and beam performance, and highlight the limitations. We will then give an overview of the upgrade program that has been put in place to meet the demands of the LHC during the High-Luminosity LHC era.
	Slides THA1WD04 [4.746 MB]
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THA2WD01	Operation Challenges and Performance of the LHC During Run II	357
	R. Steerenberg, J. Wenninger CERN, Geneva, Switzerland
	The CERN Large Hadron Collider Run II saw an important increase in beam performance through both, improvements in the LHC and an increased beam brightness from the injectors, leading to a peak luminosity that exceeds the LHC design luminosity by more than a factor two. This contribution will give an overview of run 2, the main challenges encountered and it will address the measures applied to deal with and make use of the increased beam brightness. Finally potential areas where further performance improvement can be a realized will be identified.
	Slides THA2WD01 [6.709 MB]
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THA2WD02	Low Energy RHIC electron Cooling (LEReC): Challenges and Commissioning Progress
	A.V. Fedotov BNL, Upton, Long Island, New York, USA
	Funding: Work supported by the U.S. Department of Energy. The low-energy physics program at the Relativistic Heavy Ion Collider (RHIC), motivated by a search for the QCD phase transition critical point, requires operation at very low energies. At these energies, large nonlinear magnetic field errors and large beam sizes produce low beam lifetimes. A variety of beam dynamics effects such as IBS, space charge and beam-beam forces also contribute. An electron cooling technique is effective in counteracting luminosity degradation due to the IBS. To improve luminosities for the low energies of operation, the low energy RHIC electron cooler (LEReC) was constructed and is presently under commissioning. Required electron beam and its acceleration is provided by the photoemission electron gun followed by an RF accelerator. As a first step, one has to commission high-brightness high-current electron accelerator and achieve beam parameters suitable for cooling. This will be followed by commissioning of bunched electron beam cooling, and finally by producing high-brightness hadron beams via the cooling process. Here, we describe design aspects and challenges of such an approach, as well as summarize first commissioning results. on behalf of the LEReC team.
	Slides THA2WD02 [4.416 MB]
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THA2WD03	Real-Time Measurement of Fluctuations of Building Floor and Installed Devices of Large Scientific Equipment	362
	H. J. Choi, J.H. Han, H.-S. Kang, S.H. Kim, H.-G. Lee, S.B. Lee PAL, Pohang, Kyungbuk, Republic of Korea
	Several parts that comprise the large scientific equipment should be installed and operated at precise three-dimensional location coordinates X, Y, and Z through survey and alignment to ensure their optimal performance. As time goes by, however, the ground goes through uplift and subsidence, which consequently changes the coordinates of installed components and leads to alignment errors ΔX, ΔY, and ΔZ. As a result, the system parameters change, and the performance of the large scientific equipment deteriorates accordingly. Measuring the change in locations of systems comprising the large scientific equipment in real time would make it possible to predict alignment errors, locate any region with greater changes, realign components in the region fast, and shorten the time of survey and realignment. For this purpose, a WPS's (wire position sensor) are installed in undulator section and a HLS's (hydrostatic leveling sensor) are installed in PAL-XFEL building. This paper is designed to introduce installation status of HLS and WPS, operation status.
	Slides THA2WD03 [21.186 MB]
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Paper

Title

Page

ESS Commissioning Plans

127

N. Milas, R. De Prisco, M. Eshraqi, Y. Levinsen, R. Miyamoto, M. Muñoz, D.C. Plostinar
ESS, Lund, Sweden

The ESS linac is currently under construction in Lund, Sweden, and once completed it will deliver an unprecedented 5 MW of average power. The ion source and LEBT commissioning starts in 2018 and will continue with the RFQ, MEBT and the first DTL tank next year and up to the end of the fourth DTL tank in 2020. This paper will summarize the commissioning plans for the normal conducting linac with focus on the ion source and LEBT and application development for both commissioning and operation.

Slides TUA1WD01 [1.552 MB]

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-HB2018-TUA1WD01

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TUA1WD02

KOMAC Operation and Future Plans

Y.-S. Cho
KAERI, Daejon, Republic of Korea

This talk is about KOMAC operation and future plans.

Slides TUA1WD02 [7.375 MB]

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TUA1WD03

Commissioning Status and Plans of CSNS/RCS

133

S.Y. Xu, Y.W. An, J. Chen, M.Y. Huang, H.F. Ji, Y. Li, S. Wang
IHEP, Beijing, People's Republic of China
X.H. Lu
CSNS, Guangdong Province, People's Republic of China

The China Spallation Neutron Source (CSNS) is an accelerator-based science facility. CSNS is designed to accelerate proton beam pulses to 1.6 GeV kinetic energy, striking a solid metal target to produce spallation neutrons. CSNS has two major accelerator systems, a linear accelerator (80 MeV Linac) and a 1.6 GeV rapid cycling synchrotron (RCS). The Beam commissioning of CSNS has been commissioned recently. Beam had been accelerated to 61 MeV at CSNS/Linac on April 24, 2017, and 1.6 GeV acceleration at CSNS/RCS was successfully accomplished on July 7, 2017 with the injection energy of 61 MeV. Beam had been accelerated to 80 MeV at CSNS/Linac on January 6, 2018, and 1.6 GeV acceleration at CSNS/RCS was successfully accomplished on January 18, 2018 with the injection energy of 80 MeV. The initial machine parameter tuning and various beam studies were completed. In this paper, the commissioning experiences are introduced.

Slides TUA1WD03 [10.794 MB]

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TUA1WD04

High Intensity Proton Stacking at Fermilab: 700 kW Running

136

R. Ainsworth, P. Adamson, B.C. Brown, D. Capista, K.J. Hazelwood, I. Kourbanis, D.K. Morris, M. Xiao, M.-J. Yang
Fermilab, Batavia, Illinois, USA

As part of the Nova upgrades in 2012, the Recycler was repurposed as proton stacker for the Main Injector with the aim to deliver 700 kW. Since January 2017, this design power has been run routinely. The steps taken to commission the Recycler and run at 700 kW operationally will be discussed as well as plans for future running.

Slides TUA1WD04 [62.832 MB]

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TUA2WD01

FAIR Commissioning - Concepts and Strategies in View of High-Intensity Operation

141

R.J. Steinhagen
GSI, Darmstadt, Germany

The Facility for Anti-Proton and Ion Research (FAIR) presently under construction, extends and supersedes GSI's existing infrastructure. Its core challenges include the precise control of highest proton and uranium ion beam intensities, the required extreme high vacuum conditions, machine protection and activation issues while providing a high degree of multi-user mode of operation with facility reconfiguration on time-scales of a few times per week. Being based on best-practices at other laboratories, this contribution outlines the applicable hardware and beam commissioning strategies, as well as concepts, beam-based and other accelerator systems that are being tested at the existing facility in view of the prospective FAIR operation.

Slides TUA2WD01 [10.735 MB]

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reference for this paper ※ https://doi.org/10.18429/JACoW-HB2018-TUA2WD01

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TUA2WD02

High-Power Beam Operation at J-PARC

147

S. Igarashi
KEK, Ibaraki, Japan

The Japan Proton Accelerator Research Complex (J-PARC) is a multipurpose high-power proton accelerator facility, comprising a 400 MeV linac, a 3 GeV rapid cycling synchrotron (RCS) and a 30 GeV main ring synchrotron (MR). RCS is now providing 500 kW beams to the materials and life science experimental facility (MLF) and its beam power will be increased step by step toward the design value of 1 MW. MR has been operated with the beam power of 500 kW at maximum for the long-baseline neutrino oscillation experiment (T2K). An upgrade plan of MR for the beam power of 1.3 MW for the T2K experiment is promoted with a faster cycling scheme.

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TUA2WD03

Automated Operation of EBIS Injector at BNL

153

T. Kanesue, E.N. Beebe, S. Binello, B.D. Coe, M.R. Costanzo, L. DeSanto, S. Ikeda, J.P. Jamilkowski, N.A. Kling, D. Lehn, C.J. Liaw, V. Lo Destro, D.R. McCafferty, J. Morris, M. Okamura, R.H. Olsen, D. Raparia, R. Schoepfer, F. Severino, L. Smart, K. Zeno
BNL, Upton, Long Island, New York, USA

The RHIC-EBIS pre-injector is a heavy ion pre-injector to deliver multiple heavy ion species at 2 MeV/u to the AGS-Booster at the RHIC accelerator complex. In addition to collider experiments at RHIC, multiple heavy ion species are used for the NASA Space Radiation Laboratory (NSRL) to evaluate the risk of radiation in space in radiobiology, physics, and engineering. A GCR simulator is one of the operation modes of NSRL to simulate a galactic cosmic ray event, which requires switching multiple ion species within a short period of time. The RHIC-EBIS pre-injector delivers various heavy ion species independently for simultaneous operation of RHIC and NSRL. We developed an automated scheme of the rapid species change and it is routinely used by NSRL or Main Control Room for daily operation without assistance of RHIC-EBIS experts. The number of species change exceeds one hundred. This paper describes the automated operation of the RHIC-EBIS pre-injector and the operational performance.
This work has been supported by Brookhaven Science Associates, LLC under Contract No. DE-SC0012704 with the U.S. Department of Energy, and by the National Aeronautics and Space Administration.

Slides TUA2WD03 [1.999 MB]

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WEP2PO017

Study on the Leakage Fields of the Septum and Lambertson Magnets during the Beam Commissioning

303

M.Y. Huang, S. Wang, S.Y. Xu
IHEP, Beijing, People's Republic of China

For China Spallation Neutron Source (CSNS), the septum magnets are the key part of the injection system and the lambertson magnet is the key part of the extraction system. If the leakage fields of the septum and lambertson magnets are large enough, the circular beam orbit of Rapid Cycling Synchrotron (RCS) would be affected. In this paper, during the beam commissioning, the leakage fields of the septum and lambertson magnets will be studied and their effects on the circular beam orbit will be given and discussed.

Poster WEP2PO017 [0.852 MB]

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reference for this paper ※ https://doi.org/10.18429/JACoW-HB2018-WEP2PO017

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WEP2PO022

Study on the Phase Space Painting Injection during the Beam Commissioning for CSNS

309

M.Y. Huang, S. Wang, S.Y. Xu
IHEP, Beijing, People's Republic of China

During the beam commissioning of China Spallation Neutron Source (CSNS), different injection methods were used in different periods. In the early stage, since the precise position of the injection point was unknown and the beam power was relatively small, the fixed point injection was selected. In the later period, in order to increase the beam power and reduce the beam loss, the phase space painting method was used. In this paper, the phase space painting in the horizontal and vertical planes is studied in detail and the beam commissioning results of different painting injection are given and discussed. In addition, the different injection effects of the fixed point injection and painting injection are compared and studied.

Poster WEP2PO022 [0.708 MB]

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reference for this paper ※ https://doi.org/10.18429/JACoW-HB2018-WEP2PO022

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WEP2PO023

Timing Adjustment of Eight Kickers and a Method to Calibrate the Kicker Current Curves During the Beam Commissioning for CSNS

312

M.Y. Huang, D.P. Jin, L. Shen, S. Wang, S.Y. Xu, P. Zhu
IHEP, Beijing, People's Republic of China

The extraction system is a key part of the China Spallation Neutron Source (CSNS) accelerator. It consists of two kinds of magnets: eight kickers and one lambertson. During the beam commissioning, the timing adjustment of eight kickers is a very important problem. In the paper, the methods to adjust the timing of eight kickers will be studied and applied to the beam commissioning. Then, the best method to adjust the timing of eight kickers will be given and used for a long time in the future.

Poster WEP2PO023 [1.027 MB]

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reference for this paper ※ https://doi.org/10.18429/JACoW-HB2018-WEP2PO023

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WEP2PO027

Simulation of the Axial Injection Beam Line of the Reconstructed U200 Cyclotron of FLNR JINR

319

N.Yu. Kazarinov, J. Franko, G.G. Gulbekyan, I.A. Ivanenko, I.V. Kalagin
JINR, Dubna, Moscow Region, Russia

Flerov Laboratory of Nuclear Reaction of Joint Institute for Nuclear Research begin the works under reconstruction of the cyclotron U200. The reconstructed cyclotron is intended for acceleration of heavy ions with mass-to-charge ratio A/Z within interval from 5 to 8 up to the fixed energies 3.5 and 5.3 MeV per unit mass. The intensity of the accelerated ions will be about 3 pmcA for lighter ions (A< 40) and about 0.3 pmcA for heavier ions (A<132). The cyclotron will be used in the microchip testing, production of the track pore membranes and for applied physics. The injection into cyclotron will be realized from the external superconducting ECR ion source. The simulation of the axial injection system of the cyclotron is presented in this report.

Poster WEP2PO027 [0.679 MB]

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WEP2PO028

Conceptual Design of FLNR JINR Radiation Facility Based on DC130 Cyclotron

324

N.Yu. Kazarinov, P.Yu. Apel, V. Bashevoy, V. Bekhterev, S.L. Bogomolov, O.N. Borisov, J. Franko, G.G. Gulbekyan, I.A. Ivanenko, I.V. Kalagin, V.I. Mironov, S.V. Mitrofanov, V.A. Semin, V.A. Skuratov, A. Tikhomirov
JINR, Dubna, Moscow Region, Russia

Flerov Laboratory of Nuclear Reaction of Joint Institute for Nuclear Research begins the works under the conceptual design of radiation facility based on the DC130 cyclotron. The facility is intended for SEE testing of microchips, for production of track membranes and for solving of applied physics problems. The DC130 cyclotron will accelerate heavy ions with mass-to-charge ratio A/Z of the range from 5 to 8 up to fixed energies 2 and 4.5 MeV per unit mass. The intensity of the accelerated ions will be about 1 pmcA for lighter ions (A<50) and about 0.1 pmcA for heavier ions (A>50). The injection into cyclotron will be realized from the external DECRIS-SC superconducting ECR ion source. The main magnet and acceleration system of DC130 is based on the U200 cyclotron ones that now is under reconstruction. The conceptual design parameters of various systems of the cyclotron and the set of experimental beam lines are presented in this report.

Poster WEP2PO028 [1.955 MB]

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THA1WD01

Experience and Perspective of FFAG Accelerator

342

Y. Mori
Kyoto University, Research Reactor Institute, Osaka, Japan

Funding: This work was funded by ImPACT Program of Council for Science, Technology and Innovation (Cabinet Office, Government of Japan)
This talk is about operational challenge and perspective of Fixed Field Alternating Gradient accelerators, including the recent studies on advanced FFAG for high intensity secondary particles.

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THA1WD02

SNS Operation and Upgrade Plans

A.P. Shishlo
ORNL, Oak Ridge, Tennessee, USA

Funding: This manuscript has been authored by UT-Battelle, LLC, under Contract No. DE-AC0500OR22725 with the U.S. Department of Energy.
The future power upgrade and operation parameters of the Spallation Neutron Source at Oak Ridge National Laboratory are discussed. The installation of seven additional superconducting cavities in the existing free space of the linear accelerator will increase the beam energy to 1.3 GeV. More than 95% of the installed ring and transport systems are presently capable of 1.3 GeV operation. Combination of the new beam energy and increasing the average beam current by ~50% will double the accelerator power capability to 2.8 MW. The Mercury spallation neutron target will be upgraded to a capacity of 2.0 MW beam power.

Slides THA1WD02 [4.211 MB]

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THA1WD03

Status and Beam Power Ramp-Up Plans of the Slow Extraction Operation at J-Parc Main Ring

347

M. Tomizawa, Y. Arakaki, T. Kimura, S. Murasugi, R. Muto, K. Okamura, Y. Shirakabe, E. Yanaoka
KEK, Ibaraki, Japan

A 30 GeV proton beam accelerated in the J-PARC Main Ring (MR) is slowly extracted by the third integer resonant extraction and delivered to the hadron experimental hall. Slow extraction from the MR has unique characteristics that can be used to obtain a low beam loss rate. Devices with electrostatic septum (ESSs) and magnetic septa are placed in the long straight section with zero dispersion. The separatrix for the resonance is independent of the momentum at the septa when the horizontal chromaticity is set to zero. The resulting beam has a large step size and small angular spread, enabling a low hit rate of the beam at the first ESS. Under these conditions, a dynamic bump scheme has been applied to reduce the beam loss further. We have attained 50 kW operation at 5.2s cycle in the latest physics run. A suppression of instability during debunch process is also essential as well as low beam loss tunings. In this paper, a current status and future plans toward a higher beam power for the slow extraction are reported. Preliminary results for a 8 GeV slow extraction test for the muon to electron conversion search experiment (COMET) will be also briefly presented.

Slides THA1WD03 [9.174 MB]

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THA1WD04

High-Brightness Challenges for the Operation of the CERN Injector Complex

352

K. Hanke, S.C.P. Albright, R. Alemany-Fernández, H. Bartosik, E. Chapochnikova, H. Damerau, G.P. Di Giovanni, B. Goddard, A. Huschauer, V. Kain, A. Lasheen, M. Meddahi, B. Mikulec, G. Rumolo, R. Scrivens, F. Tecker
CERN, Geneva, Switzerland

CERN's LHC injectors are delivering high-brightness proton and ion beams for the Large Hadron Collider LHC. We review the present operation modes and beam performance, and highlight the limitations. We will then give an overview of the upgrade program that has been put in place to meet the demands of the LHC during the High-Luminosity LHC era.

Slides THA1WD04 [4.746 MB]

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THA2WD01

Operation Challenges and Performance of the LHC During Run II

357

R. Steerenberg, J. Wenninger
CERN, Geneva, Switzerland

The CERN Large Hadron Collider Run II saw an important increase in beam performance through both, improvements in the LHC and an increased beam brightness from the injectors, leading to a peak luminosity that exceeds the LHC design luminosity by more than a factor two. This contribution will give an overview of run 2, the main challenges encountered and it will address the measures applied to deal with and make use of the increased beam brightness. Finally potential areas where further performance improvement can be a realized will be identified.

Slides THA2WD01 [6.709 MB]

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THA2WD02

Low Energy RHIC electron Cooling (LEReC): Challenges and Commissioning Progress

A.V. Fedotov
BNL, Upton, Long Island, New York, USA

Funding: Work supported by the U.S. Department of Energy.
The low-energy physics program at the Relativistic Heavy Ion Collider (RHIC), motivated by a search for the QCD phase transition critical point, requires operation at very low energies. At these energies, large nonlinear magnetic field errors and large beam sizes produce low beam lifetimes. A variety of beam dynamics effects such as IBS, space charge and beam-beam forces also contribute. An electron cooling technique is effective in counteracting luminosity degradation due to the IBS. To improve luminosities for the low energies of operation, the low energy RHIC electron cooler (LEReC) was constructed and is presently under commissioning. Required electron beam and its acceleration is provided by the photoemission electron gun followed by an RF accelerator. As a first step, one has to commission high-brightness high-current electron accelerator and achieve beam parameters suitable for cooling. This will be followed by commissioning of bunched electron beam cooling, and finally by producing high-brightness hadron beams via the cooling process. Here, we describe design aspects and challenges of such an approach, as well as summarize first commissioning results.
on behalf of the LEReC team.

Slides THA2WD02 [4.416 MB]

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THA2WD03

Real-Time Measurement of Fluctuations of Building Floor and Installed Devices of Large Scientific Equipment

362

H. J. Choi, J.H. Han, H.-S. Kang, S.H. Kim, H.-G. Lee, S.B. Lee
PAL, Pohang, Kyungbuk, Republic of Korea

Several parts that comprise the large scientific equipment should be installed and operated at precise three-dimensional location coordinates X, Y, and Z through survey and alignment to ensure their optimal performance. As time goes by, however, the ground goes through uplift and subsidence, which consequently changes the coordinates of installed components and leads to alignment errors ΔX, ΔY, and ΔZ. As a result, the system parameters change, and the performance of the large scientific equipment deteriorates accordingly. Measuring the change in locations of systems comprising the large scientific equipment in real time would make it possible to predict alignment errors, locate any region with greater changes, realign components in the region fast, and shorten the time of survey and realignment. For this purpose, a WPS's (wire position sensor) are installed in undulator section and a HLS's (hydrostatic leveling sensor) are installed in PAL-XFEL building. This paper is designed to introduce installation status of HLS and WPS, operation status.

Slides THA2WD03 [21.186 MB]

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