Keyword: interface
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MOPAB011 Impact on the HL-LHC Triplet Region and Experiments From Asynchronous Beam Dumps on Tertiary Collimators proton, neutron, photon, optics 96
 
  • A. Tsinganis, R. Bruce, F. Cerutti, A. Lechner
    CERN, Geneva, Switzerland
  
  Accidental beam impacts on the tertiary collimators (TCTs) can lead to significant energy deposition in the triplet region and to leakage of the induced particle shower towards the experimental cavern. In this work, carried out in the context of the planned High Luminosity Upgrade of the LHC, severe impacts from asynchronous beam dumps on the horizontal tertiary collimators in cells 4 and 6 of the CMS insertion were studied, with half or a full proton bunch impacting on a collimator jaw. The choice of jaw material is shown to be of great importance, with over a factor of 10 increase in peak energy density values in the triplet coils moving from tungsten (Inermet) to molybdenum graphite jaws. Nevertheless, although the quench limit is exceeded in at least one or more triplet magnets in all the evaluated scenarios, values remain well below the damage limit. Energy spectra of particles leaking into the experimental cavern have also been estimated and are presented here.  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2017-MOPAB011  
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MOPIK095 Implementation Issues and First Results of the ESS Beam Current Monitor System electronics, linac, ion-source, FPGA 745
 
  • H. Hassanzadegan, M.D. Donna, A. Jansson, H. Kocevar, T.J. Shea
    ESS, Lund, Sweden
  • M. Werner
    DESY, Hamburg, Germany
  
  The BCM system of the European Spallation Source needs to measure several beam parameters including pulse profile, charge, current, pulse width and repetition frequency. Moreover, it will measure differential beam currents using several ACCT pairs along the linac. This is particularly important at low beam energies where BLMs cannot be used for measuring beam losses. Due to the ESS-specific requirements, the BCM software and firmware will be customized. Also, parts of the electronics may need to be customized to be consistent with the ESS standard electronics platform, hence facilitate maintenance and maximize synergy with other systems. Technical challenges include maintaining signal integrity and a fast response despite large variations in the sensor cable length and ambient temperature, as well as minimizing the effect of the ground voltage fluctuations. This paper gives a general overview of the design and focuses on a few technical issues that are particularly important for satisfying the performance requirements. Also, BCM test results in laboratory conditions as well as preliminary results with the ESS ion source will be presented.  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2017-MOPIK095  
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MOPIK126 Establishing a Project Management Office for the Large Scale Multi Project FAIR project-management, site, controls, operation 835
 
  • F. Becker, S. Deveaux, A. Fröhlich, G. Hickler, M. Lautenschläger, M. Raponi, B. Schoenfelder, M. Strangmann, N. Winters
    GSI, Darmstadt, Germany
  • J.R. Regler, D. Urner
    FAIR, Darmstadt, Germany
  
  The Facility for Antiproton and Ion Research (FAIR) is a large scale multi project comprising 10 subprojects in the field of accelerators (pLINAC, SIS100, SuperFRS, p-bar Separator, Collector Ring, High Energy Storage Ring), experiments (CBM, APPA, NUSTAR, PANDA) and civil construction. This contribution describes an integrated approach how a controlling type project management office (PMO) was established, meeting the overall requirements for project steering and specific requirements of the subprojects and international partners involved. Major responsibilities of the PMO are project planning, integrated reporting, cost and budget control, risk management, in-kind coordination & procurement, quality assurance & configuration management. Core processes, roles and responsibilities, methodology and interfaces internally and towards the project pillars are presented.  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2017-MOPIK126  
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MOPVA075 Development of High Sensitive X-Ray Mapping for SC Cavities cavity, survey, operation, cryogenics 1040
 
  • H. Tongu, H. Hokonohara, Y. Iwashita
    Kyoto ICR, Uji, Kyoto, Japan
  • R.L. Geng, A.D. Palczewski
    JLab, Newport News, Virginia, USA
  • H. Hayano, T. Kubo, T. Saeki, Y. Yamamoto
    KEK, Ibaraki, Japan
  • H. Oikawa
    Utsunomiya University, Utsunomiya, Japan
  
  We developed an X-ray mapping system sX-map for superconducting cavities. The sensors are inserted under the stiffener rings between cavity cells, whose locations are close to the iris areas. The whole circuits are im-mersed in liquid He and the multiplexed signals reduces the number of cables to the room temperature region. sX-map has the advantages in its compact size, low cost and simple setup for nondestructive inspections. The sX-map system detected X-rays from field emissions in vertical RF tests of ILC 9-cell cavities at Jefferson Lab (JLab) and KEK. sX-map showed an excellent performance in the meas-urement test at JLab, it exhibited a high sensitivity com-pared with an the fixed diode rings colocated at irises and ion chamber located out side of the vertical test cryostat.  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2017-MOPVA075  
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MOPVA114 Materials Characterization for SRF Cavities: Gaining Insight Into Nb3Sn ion, SRF, cavity, electron 1111
 
  • J. Tuggle
    Virginia Polytechnic Institute and State University, Blacksburg, USA
  • G.V. Eremeev, A.D. Palczewski, C.E. Reece
    JLab, Newport News, Virginia, USA
  • M.J. Kelley, U. Pudasaini
    The College of William and Mary, Williamsburg, Virginia, USA
  
  Funding: JLab work supported by U.S. DOE Contract No. DE-AC05-06OR23177. Work at William & Mary and Virginia Tech supported by the Office of High Energy Physics, U.S. Department of Energy grant DE-SC-0014475
Although SRF accelerators are an invaluable research tool they can be painfully expensive to construct and operate at the current level of SRF technology. This cost is significantly due to the necessity to operate at a temperature of only 2K. Considerable research is currently underway into next generation SRF cavity technologies such as Ndoping and Nb3Sn coating. Both of these technologies will lower the cryogenic load of accelerators, correspondingly lowering both construction and operating costs. However, current understanding of either technology is incomplete and in order to elucidate the underlying mechanisms there is a need to push current characterization methods forward. In this work, ion beam techniques (e.g. focused ion beam (FIB)), and electron backscatter diffraction (EBSD) were applied to help understand Nb3Sn coating mechanisms. This presentation will focus on characterization, providing examples of EBSD work, along with discussion of some of the issues encountered while trying to produce high quality EBSD data. 		 
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2017-MOPVA114  
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TUPAB108 Upgrade of BTS Control System for the Taiwan Light Source controls, EPICS, operation, GUI 1570
 
  • Y.-S. Cheng, J. Chen, K.T. Hsu, K.H. Hu, C.H. Huang, D. Lee, C.Y. Liao, C.Y. Wu
    NSRRC, Hsinchu, Taiwan
  
  The Taiwan Light Source (TLS) is a third generation of synchrotron light source, and it has been operated since 1993. The TLS control system is a proprietary design. It was performed minor upgrade several times to avoid obsolete of some system components and keep up-to-date during last two decades. The control system of BTS (Booster-to-Storage ring) transport line includes control interfaces of power supplies, screen monitors, vacuum and temperature. The cPCI (CompactPCI) based EPICS IOC (Input Output Controller) has been adopted for renewing TLS BTS control system to replace the existed VME based ILC (Intelligent Local Controller) to be as an easy-to-maintain control environment. Moreover, each TLS control console supports not only the existing control software interfaces, but also the newly developed EPICS graphical user interfaces. Upgraded TLS BTS control system had been successfully commissioning in February 2017. Compare new system with old system, new system provides more functionality, fast response, and highly reliability. The efforts are summarized at this paper.  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2017-TUPAB108  
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TUPIK007 VisualPIC: A New Data Visualizer and Post-Processor for Particle-in-Cell Codes simulation, software, plasma, GUI 1696
 
  • A. Ferran Pousa, R.W. Aßmann
    DESY, Hamburg, Germany
  • A. Martinez de la Ossa
    University of Hamburg, Hamburg, Germany
  
  Numerical simulations are heavily relied on for evaluating optimal working points with plasma accelerators and for predicting their performance. These simulations produce high volumes of complex data, which is often analyzed by scientists with individually prepared software and analysis tools. As a consequence, there is a lack of a commonly available, quick, complete and easy-to-use data visualizer for Particle-In-Cell simulation codes. VisualPIC is a new application created with the aim of filling that void, providing a graphical user interface with advanced tools for 2D and 3D data visualization, post-processing and particle tracking. The program is developed under the principles of open source and with a modular design, an approach and architecture which allow interested scientists to contribute by adding new features or compatibility for additional simulation codes.  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2017-TUPIK007  
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TUPIK060 Human Factors in the Design of Control-Rooms for ESS controls, factory, operation, target 1830
 
  • P. Le Darz, S.G. Collier, M. Rosenqvist
    IFE, Halden, Norway
  
  Funding: The Research Council of Norway [ForskningsrÃ¥det]
Norway contributes in kind to the building of ESS. Part of this work concerns the human factors aspects of the control-rooms for the operators of the machine. IFE is applying international standards on human factors (e.g., ISO 11064) to the design of the main control-room (MCR) and a local control-room (LCR). The work is also intended to satisfy regulatory requirements. So far, for the MCR, we have completed a concept design. User requirements clarification involved interviews with stakeholders and visits to similar facilities. Concept design for the MCR was iterative and involved a user reference-group set up for the project. During several workshops, alternatives for layout and workstations were discussed and modeled using 3D graphics. The chosen concept design and 3D model were then checked against standards. The resulting design was approved by the user-group and now goes forward to detailed design and realization. We have also completed detailed design of the LCR so that it is available for commissioning before the MCR is built. IFE also contributes to the human-machine interface design in other projects, such as for alarm system design and a logbook software application. 		 
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2017-TUPIK060  
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TUPIK065 A Software for Smoothing Magnet Track in Particle Accelerator* software, alignment, storage-ring, network 1842
 
  • Q. Zhang, X.Y. He, G. Liu, W. Wang
    USTC/NSRL, Hefei, Anhui, People's Republic of China
  
  This article describes a software for smoothing magnet track in particle accelerator. This paper introduces the development process of the software from the aspects of interface design, algorithm analysis, parameter meaning and so on. Magnet track smoothing means that under the conditions of meeting absolute accuracy, if the relative position error of the adjacent magnet is too large, it will cause the loss of beam, we call the track curve is not smooth enough. Smooth analysis can find these magnet components, the curve is smooth after a reasonable ad-justment. The software is based on the least square method. The software is tested by using the data of HLS storage ring, the results meet the needs of the work.  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2017-TUPIK065  
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TUPIK083 Methodology, Design and Physical Deployment of Highly Dependable PLC Based Interlock Systems for ESS vacuum, PLC, operation, hardware 1887
 
  • M. Zaera-Sanz, S. Kövecses, A. Nordt
    ESS, Lund, Sweden
  
  Approximately 350 resistive magnets, 110 vacuum gate valves and 30 interceptive devices will be installed in the 600 m long linear accelerator at ESS, transporting the proton beam from the source to the target station. In order to protect this equipment from damage and to take the appropriate actions required to minimise recovery time, a dedicated set of PLC based interlock systems are being designed. The magnet powering interlock system will safely switch off a Power Converter (PC) upon the detection of an internal magnet or PC failure. The interceptive devices interlock system will protect Faraday cups, wire scanners, EMUs and LBMs from a beam mode that they cannot withstand by allowing/removing permission for movement. The vacuum gates interlock system will protect the gate valves in case of unexpected closing. The target interlock system will protect the target system by acting on motors, compressors, etc. These interlock systems will inform the beam interlock system to inhibit further beam operation by stopping beam if required. The methodology, design and physical deployment of the four interlock systems will be presented.  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2017-TUPIK083  
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TUPIK084 The EPICS Based Control System at the FREIA Laboratory EPICS, controls, PLC, radiation 1890
 
  • K. Fransson, K.J. Gajewski, M. Jacewicz, M. Jobs, R.J.M.Y. Ruber, V.G. Ziemann
    Uppsala University, Uppsala, Sweden
  
  FREIA (Facility for REsearch and Instrumentation for Accelerator development) Laboratory at Uppsala University, Sweden, is a new facility, inaugurated 2013. Initially FREIA is testing and developing superconducting accelerating cavities and high power RF sources in collaboration with the European Spallation Source (ESS). Later projects include testing of superconducting cavities and magnets for the high luminosity LHC. The high level control, alarm system and archiving is implemented in EPICS. Presently this includes a helium liquefaction plant, a horizontal test cryostat, two high power RF amplifiers, a low level RF system, environment monitoring and safety systems. Some attention will be given to integration of commercially acquired systems as well as the safety system, interlocks and radiation monitoring. The implementation of the EPICS environment follows closely that of ESS and thus can provide a test bench for developments at ESS.  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2017-TUPIK084  
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TUPIK091 Simulation Tools for the Design and Performance Evaluation of Transverse Feedback Systems feedback, framework, simulation, pick-up 1912
 
  • J. Komppula, W. Höfle, K.S.B. Li
    CERN, Geneva, Switzerland
  
  Transverse feedback systems are used in synchrotrons and storage rings to damp injection oscillations and suppress transverse instabilities. Especially instabilities driven by high intensity beams in future circular colliders such as the FCC set challenging requirements for transverse feedback systems. In order to develop a transverse feedback system able to meet those requirements, sophisticated simulation tools are required. For this purpose, a new modular framework for modeling a transverse feedback system has been developed in Python. The framework can be used as a transverse feedback module in the macro-particle beam dynamics simulation code PyHEADTAIL or as a separate tool for studying a feedback model from a control theory point of view by using a simple signal models for the beam. The main principle of the code is presented and simulation methods used for the conceptual design of the FCC are discussed.  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2017-TUPIK091  
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WEPAB121 Database for NSLS-II Accelerator Operation database, operation, controls, software 2854
 
  • J. Choi, R.I. Farnsworth, T.V. Shaftan, G.J. Weiner, X. Yang
    BNL, Upton, Long Island, New York, USA
  
  Funding: DOE Contract No: DE-SC0012704
NSLS-II is employing a database and corresponding user interfaces which are used for the accelerator data sharing and management. The database include operation related information such as beam optics parameters, magnet measurement data, survey data and operation summary. To improve the usability, other functionalities are also being added. However, due to the limited scope, the general expectation of the overall facility cannot not be met and, in order to solve the issue, we are in the process of adopting Component Database (ComponentDB) developed at Advanced Photon Source (APS). This paper shows the current status of the process. 		 
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2017-WEPAB121  
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WEPAB138 Prototyping High-Gradient mm-Wave Accelerating Structures accelerating-gradient, experiment, cavity, RF-structure 2902
 
  • E.A. Nanni, V.A. Dolgashev, A.A. Haase, J. Neilson, S.G. Tantawi
    SLAC, Menlo Park, California, USA
  • S.C. Schaub
    MIT, Cambridge, Massachusetts, USA
  • B. Spataro
    INFN/LNF, Frascati (Roma), Italy
  • R.J. Temkin
    MIT/PSFC, Cambridge, Massachusetts, USA
  
  We present single-cell accelerating structures designed for high-gradient testing at 110 GHz. The purpose of this work is to study the basic physics of ultrahigh vacuum RF breakdown in high-gradient RF accelerators. The accelerating structures are pi-mode standing-wave cavities fed with a TM01 circular waveguide. The structures are fabricated using precision milling out of two metal blocks, and the blocks are joined with diffusion bonding and brazing. The impact of fabrication and joining techniques on the cell geometry and RF performance will be discussed. First prototypes had a measured Qo of 2800, approaching the theoretical design value of 3300. The geometry of these accelerating structures are as close as practical to single-cell standing-wave X-band accelerating structures more than 40 of which were tested at SLAC. This wealth of X-band data will serve as a baseline for these 110 GHz tests. The structures will be powered with short pulses from a MW gyrotron oscillator. RF power of 1 MW may allow us to reach an accelerating gradient of 400 MeV/m.  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2017-WEPAB138  
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WEPIK111 Derivation of a Finite Element Formulation From a Lagrangian for the Electromagnetic Potentials electromagnetic-fields, coupling, operation, resonance 3208
 
  • A.R. Vrielink, M.H. Nasr, S.G. Tantawi
    SLAC, Menlo Park, California, USA
  
  Conventional electromagnetic finite element solvers typically solve a weak formulation of the Helmholtz wave equation. While mathematically this approach is correct, it does not fully reflect the fundamental physics involved. We offer an alternative variational formulation which is not derived from the Helmholtz wave equation but is more fundamentally tied to the physics of the system: a Lagrangian for the electromagnetic potentials. Solving for the potentials directly allows for a natural accounting of the beam wave interaction. It could also potentially avoid the issue of deleterious spurious modes inherent when selecting the Coulomb gauge and enforcing the subsequent divergence free condition, eliminating the need for vector basis functions. Herein we present the theory and the resulting formulation including a discussion on gauge fixing. We conclude with some numerical results demonstrating the potential of this formulation.  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2017-WEPIK111  
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WEPIK112 A 2D Finite Element Solver for Electromagnetic Fields with m-fold Azimuthal Symmetry operation, simulation, gun, cavity 3211
 
  • A.R. Vrielink, M.H. Nasr, S.G. Tantawi
    SLAC, Menlo Park, California, USA
  
  Radiofrequency (RF) cavities for use in accelerators, from RF sources to accelerating and transverse cavities, often exhibit m-fold azimuthal symmetry. For cases where m>0, commercially available finite element codes used to simulate the beam-wave interaction typically require a full 3D simulation. We have derived a finite element formulation which accounts for the known azimuthal dependence of the electromagnetic fields, allowing us to solve for these problems on a 2D mesh and reducing simulation times significantly. The theory, including the construction of the local finite element matrices and the selection of appropriate basis functions, will be presented in addition to numerical results.  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2017-WEPIK112  
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WEPVA019 Group Velocity Matching in Dielectric-Lined Waveguides and its Role in Electron-THz Interaction electron, acceleration, simulation, accelerating-gradient 3296
 
  • A.L. Healy, G. Burt
    Cockcroft Institute, Lancaster University, Lancaster, United Kingdom
  • D.M. Graham
    The University of Manchester, The Photon Science Institute, Manchester, United Kingdom
  • S.P. Jamison
    STFC/DL/ASTeC, Daresbury, Warrington, Cheshire, United Kingdom
  
  Terahertz(THz)-driven dielectric-lined waveguides have applications in electron manipulation, particularly acceleration, as the use of dielectric allows for phase velocities below the speed of light. However matching a single frequency to the correct velocity does not maximise electron-THz interaction; waveguide dispersion typically results in an unmatched group velocity and so the pulse envelope of a short THz pulse changes along the length of the structure. This reduces field amplitude and therefore accelerating gradient as the envelope propagates at a different velocity to the electron. Presented here is an analysis of the effect of waveguide dispersion on THz-electron interaction and its influence on structure dimensions and choice of THz pulse generation. This effect on net acceleration is demonstrated via an example of a structure excited by a single-cycle THz pulse, with a comparison of multi-cycle, lower intensity THz pulses on net acceleration.  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2017-WEPVA019  
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WEPVA068 Design and Development of Accelerator Magnet Power Supply Based on SiC-MOSFET power-supply, controls, experiment, operation 3429
 
  • L. Yang, F. Long, Z.H. ZhenHua
    IHEP, Beijing, People's Republic of China
  
  SiC is a new type of semiconducting material with rapid development after the first generation and the second generation of semiconductor materials represented by silicon and gallium arsenide. SiC-MOSFET has a high frequency, high breakdown voltage, high temperature, radiation and many other points, suitable for future use in the accelerator magnet power supply. In this paper, the development and operation of a SiC-MOSFET-based accelerator magnet power supply are described in detail. The experiment results show that the performance of this power supply is superior to that of the same specification using Si-MOSFET. The power supply adopts one-way AC power supply, and the output stage adopts the full bridge circuit topology. The power device adopts C2M0040120D SiC-MOSFET, the working frequency is 30 kHz, the output current is ± 20A, the output voltage is ± 20V, and power is 400W. The Digital Power Supply Control Module (DPSCM) is used to realize high-precision digital closed-loop control, which supports on-line debugging and PC control. Power supply can be used to correct the magnet power, with high efficiency, high stability, and fast response and so on.  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2017-WEPVA068  
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WEPVA085 Development of High Stabile Magnet Power Supply FPGA, power-supply, experiment, dipole 3455
 
  • K.-H. Park, J.H. Han, S.-H. Jeong, Y.G. Jung, D.E. Kim, H.-G. Lee, S.B. Lee, B.G. Oh, H.S. Suh
    PAL, Pohang, Kyungbuk, Republic of Korea
  
  A high stable magnet power supply (MPS) was devel-oped, which was a bipolar type with 200A of the output current at the 40V of output voltage. The MPS has been implemented by the digital signal processing technology using the DSP, FPGA, ADCs and so on. The output cur-rent stability of the MPS showed about 4 ppm peak-to-peak in a short term experiment at the 200A of its full output current. This paper shows the several design con-siderations being implemented to this high stable MPS. Some experimental data such as output stability, some waveforms and so on are given in this paper.  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2017-WEPVA085  
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WEPVA102 Design of the New CERN nTOF Neutron Spallation Target: R&D and Prototyping Activities target, neutron, operation, proton 3503
 
  • R. Esposito, M. Calviani, T. Coiffet, M. Delonca, L. Dufay-Chanat, E. Gallay, M. Guinchard, D. Horvath, T. Koettig, A.P. Perez, A.T. Perez Fontenla, A. Perillo-Marcone, S. Sgobba, M.A. Timmins, A. Vacca, V. Vlachoudis
    CERN, Geneva, Switzerland
  • M. Beregret
    UTBM, Belfort, France
  • L. Gomez Pereira
    University of Vigo, Pontevedra, Spain
  • F. Latini
    University of Rome La Sapienza, Rome, Italy
  • R. Logé
    EPFL, Lausanne, Switzerland
  
  A new spallation target for the CERN neutron time-of-flight facility will be installed during Long Shutdown 2 (2019-2020), with the objective of improving operational reliability, avoiding water contamination of spallation products, corrosion/erosion and creep phenomena, as well as optimizing it for the 20 m distant vertical experimental area 2, whilst keeping the same physics performances of the current target at the 200 m far experimental area 1. Several solutions have been studied with FLUKA Monte Carlo simulations in order to find the optimal solution with respect to neutron fluence, photon background, resolution function, energy deposition and radiation damage. Thermo-mechanical studies (including CFD simulations) have been performed in order to evaluate and optimize the target ability to withstand the beam loads in terms of maximum temperatures reached, cooling system efficiency, maximum stresses, creep and fatigue behaviour of the target materials, leading to a preliminary mechanical design of the target. This paper also covers the further prototyping and material characterization activities carried out in order to validate the feasibility of the investigated solutions.  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2017-WEPVA102  
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WEPVA105 Upgrading of Ageing CERN Underground Infrastructure to Fulfil the Space Requirements of New Facilities at CERN monitoring, experiment, gun, electron 3510
 
  • A. Martínez Sellés, E. Carlier, V. Di Murro, B. Goddard, E. Gschwendtner, F.J. Magnin, R.F. Morton, J.A. Osborne
    CERN, Geneva, Switzerland
  • V. Di Murro
    University of Cambridge, Cambridge, United Kingdom
  
  Particle accelerator technology is constantly being developed, and new equipment and machines replace the former ones to keep pushing the energy and intensity frontiers. Therefore, in order to meet the space requirements of new equipment, the infrastructure often needs to be modified, and given its rigid nature, this presents a challenge for the civil engineers to provide the needed space without compromising the safety and serviceability of the structures. In this paper two underground works are presented: a new cross-passage tunnel for the AWAKE experiment completed in 2014 and the future SPS Beam Dump. The challenges that must be faced are: (a) to make sure that the movements of the adjacent structures remain within admissible limits, (b) to design and execute the works such that the life span of the structure is not reduced, (c) To ensure the effectiveness of existing and new drainage systems during and after the works. For these purposes, in the frame of future tunnel asset management, the use of novel and conventional monitoring techniques plays a crucial role as it can predict in real time potential tunnel deformations which can lead, in the worst scenario, to tunnel failure  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2017-WEPVA105  
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WEPVA150 New Controller for High Voltage Converter Modulator at Spallation Neutron Source controls, LabView, timing, high-voltage 3621
 
  • D.L. Brown, X. Geng, S.W. Lee, M. Wezensky, A.P. Zhukov
    ORNL, Oak Ridge, Tennessee, USA
  
  Funding: This manuscript has been authored by UT-Battelle, LLC under Contract No. DE-AC05-00OR22725 with the U.S. Department of Energy.
We have developed a new control system for the high voltage converter modulator at the Spallation Neutron Source to replace the original control system designed by Los Alamos National Laboratory which is approaching obsolescence. The new controller, based on national instruments PXI/FlexRIO FPGA hardware, offers enhancements over the original system such as modular construction, flexibility and non-proprietary software. The new controller also provides new capabilities like modulator pulse flattening, waveform capture & first fault detection. This paper will discuss the design of the system, including the human machine interface, based on lessons learned at the Spallation Neutron Source and other projects. It will also discuss performance and other issues related to operation in an accelerator facility which requires high availability. To date half of the high voltage converter modulators have been upgraded with the new controller with the remainder scheduled for completion by mid-2017. 		 
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2017-WEPVA150  
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THPAB019 PSPA, a Web Platform for Simulation of Particle Accelerator simulation, lattice, linac, positron 3730
 
  • M.E. Biagini, A. Variola
    INFN/LNF, Frascati (Roma), Italy
  • L. Garnier, H. Guler, C. Helft, G. Le Meur, M. Nicolas, A. Pérus, F. Touze
    LAL, Orsay, France
  
  PSPA (Platform for Simulation of Particle Accelerators) is an original web-based interactive simulation platform for designing and modelling particle accelerators created at Laboratoire de l'Accélérateur Linéaire, Orsay. It aims at eventually containing all the tools to make a start-to-end simulation of an accelerator, and make it possible to run interactively several open source simulations codes available worldwide. At the moment, the focus is on electron/positron accelerators. PSPA will optimize the work of accelerator designers by factoring once and for all the tedious, time-consuming and error prone process of translating data formats between the various codes involved in the modelling of a machine, controlling the repeated execution of these models by easily varying some parameter and managing the associated data. Moreover, as a truly innovative feature, it will provide a convenient means for testing different physical models of a given part of a machine. The status of the project is described in this paper, and examples of its application to the ThomX compact Compton backscattering source at LAL are presented.  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2017-THPAB019  
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THPAB043 Evolution of Python Tools for the Simulation of Electron Cloud Effects simulation, electron, hadron, toolkit 3803
 
  • G. Iadarola, E. Belli, K.S.B. Li, L. Mether, A. Romano, G. Rumolo
    CERN, Geneva, Switzerland
  
  PyECLOUD was originally developed as a tool for the simulation of electron cloud build-up in particle accelerators. Over the last five years the code has become part of a wider set of modular and scriptable python tools that can be combined to study different effects of the e-cloud in increasingly complex scenarios. The Particle In Cell solver originally included in PyECLOUD later developed into a stand-alone general purpose library (PyPIC) that now includes advanced features like a refined modeling of curved boundaries and optimized resolution based on the usage of nested grids. The effects of the e-cloud on the beam dynamics can be simulated interfacing PyECLOUD with the PyHEADTAIL code. These simulations can be computationally very demanding due to the multi-scale nature of this kind of problems. Hence, a dedicated parallelization layer (PyPARIS) has been recently developed to profit of parallel computing resources in order to significantly speed-up the computation.  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2017-THPAB043  
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THPAB060 pyAT: A Python Build of Accelerator Toolbox lattice, synchrotron, synchrotron-radiation, radiation 3855
 
  • W.A.H. Rogers
    DLS, Oxfordshire, United Kingdom
  • N. Carmignani, L. Farvacque, B. Nash
    ESRF, Grenoble, France
  
  Accelerator Toolbox* (AT) is a particle accelerator modelling tool originally written in MATLAB. It is used at many accelerator facilities, particularly synchrotron light sources, as an on-line model and is also used for off-line beam dynamics studies. For speed of execution, the tracking engine of AT was written in C and compiled for use in MATLAB. The C-based implementation allowed re-use of of the tracking engine compiled against the core Python libraries to create a Python version of AT. For additional purposes of speed, the C interface to the integration routines has been modified allowing equal speeds for both MATLAB and Python interfaces, with an increase in speed relative to the original MATLAB version. This paper describes the adaptation process, including adapting the MATLAB build, creating the Python build and laying the foundations for the additional Python library implementation. Speed benchmarks are included with comparison to other tracking codes Elegant and MADX.
* A. Terebilo, Accelerator Toolbox for MATLAB, SLAC-PUB-8732 (2001) 		 
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2017-THPAB060  
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THPAB074 MuSim, a Graphical User Interface for Multiple Simulation Programs simulation, proton, electron, storage-ring 3880
 
  • T.J. Roberts, R.J. Abrams, M.A. Cummings
    Muons, Inc, Illinois, USA
  • Y. Bao
    UCR, Riverside, California, USA
  
  MuSim is a user-friendly program designed to interface to many different particle simulation codes, regardless of their data formats or geometry descriptions. It presents the user with a compelling graphical user interface that includes a flexible 3-D view of the simulated world plus powerful editing and drag-and-drop capabilities. All aspects of the design can be parameterized so that parameter scans and optimizations are easy. It is simple to create plots and display events in the 3-D viewer, allowing for an effortless comparison of different simulation codes. Simulation codes: G4beamline 3.02, MCNP 6.1, and MAD-X; more are coming. Many accelerator design tools and beam optics codes were written long ago, with primitive user interfaces by today's standards. MuSim is specifically designed to make it easy to interface to such codes, providing a common user experience for all, and permitting the construction and exploration of models with very little overhead. For today's technology-driven students, graphical interfaces meet their expectations far better than text-based tools, and education in accelerator physics is one of our primary goals.  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2017-THPAB074  
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THPAB104 Engineering Documentation and Asset Management for the European XFEL Accelerator operation, database, status, SRF 3960
 
  • L. Hagge, J.A. Dammann, T.T. Hongisto, J. Kreutzkamp, D. Käfer, B. List, S. Rohwedder, S. Sühl, N. Welle
    DESY, Hamburg, Germany
  • A. Frank
    European XFEL, Schenefeld, Germany
  
  At the European XFEL, extensive technical documentation has been created during design and construction of the accelerator. It is based on a configuration database (the DESY EDMS), which provides an inventory of major accelerator systems. The configuration database registers components and their used materials, tracks component design and fabrication history, and contains engineering documents and drawings, and work and inspection records. Technical documentation can be accessed through intuitive reports and navigational tree structures, representing specific beamline sections or areas of the facility. Access on mobile devices in the accelerator tunnel is supported by component tags with QR codes. A dedicated front-end has been developed for automatically uploading and cross-linking documents to the configuration database, reducing documentation efforts in the project teams. The configuration database now serves as a foundation for upcoming technical operation and maintenance activities. The paper provides an overview of the available engineering documentation and its access methods, and discusses its expected role and benefits in future maintenance processes.  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2017-THPAB104  
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THPAB121 The Study of Accelerator Data Archiving and Retrieving Software database, EPICS, software, operation 4007
 
  • Y.S. Qiao, G. Lei, Z. Zhao
    IHEP, Beijing, People's Republic of China
  
  This paper presents a novel archiving and retrieving software designed for BEPC-II and other particle accelerators. At BEPC-II, real-time data are stored as index files recorded by traditional EPICS Channel Archiver. Never-theless, index files are not suitable for long-term maintenance and difficult for data analysis. The NoSQL database MongoDB is used for this new system due to aging technologies, so as to promote the data storage reliability, usability, and possible future advanced data analysis. A cross-platform UI (User Interface) has also been developed to make it quicker and easier to access the database. The writing and query performance are tested for this software.  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2017-THPAB121  
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THPAB137 New Approach in Developing Open XAL Applications GUI, software, framework, controls 4043
 
  • C. Rosati, E. Laface
    ESS, Lund, Sweden
  
  Open XAL project is a pure-Java open source development environment used for creating accelerator physics applications, scripts and services. Working with Open XAL requires developing a Java application with a prominent graphical user interface, allowing the final user to interact with the accelerator model, and to graphically view the results such interaction produced. Nevertheless the Open XAL support for specialized components (handling plotting, EPICS connection) and for a document-view application framework, relieving the developer of the burden related with this programming aspects, a lot of boilerplate code has still to be created, making the developer spending more time in UI than in accelerator physics code. In this paper a new approach in developing Open XAL applications is explained. Here the developer is relieved of the UI-related common code code by using software tools, allowing him to visually design the flow of data and events between the various elements of the applications (widgets and models), and automatically generate the application code, where code generation can be customized to use one of the available plugged programming languages (Java, Python, JS, …).  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2017-THPAB137  
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THPIK033 RF-Mechanical Design and Prototyping of the SPES RFQ rfq, vacuum, alignment, simulation 4166
 
  • L. Ferrari, A. Palmieri, A. Pisent
    INFN/LNL, Legnaro (PD), Italy
  
  The SPES RFQ is designed in order to accelerate beams in CW with A/q ratios from 3 to 7 from the Charge Breeder through the MRMS and the selection and injection lines up to the MEBT. RFQ is composed of 6 modules about 1.2 m long each. Each module is basically composed of a Stainless Steel Tank and four OFE Copper Electrodes (obtained by brazing of two subassemblies in order to spare material). A copper layer is electrodeposited on the tank inner surface and a spring joint between tank and electrode is used in order to seal the RF. In this paper the main result of the design of the RFQ (with particular focus on the RF-mechanical aspects and thermo-structural calculations), the RFQ prototyping strategy as well as the construction and assembly procedure of RFQ modules are described.  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2017-THPIK033  
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THPVA050 Latest Progress of Magnet Girder Prototypes for HEPS-TF controls, alignment, photon, target 4551
 
  • H. Wang, C. H. Li, S.J. Li, H. Qu, Z. Wang, L. Wu
    IHEP, Beijing, People's Republic of China
  
  The magnet girder technology is one of the key tech-nologies which should be overcome in the stage of HEPS-TF (Test Facility of High Energy Photon Source). The girder should be beam-based aligned, and must has high adjusting precision and high stability as well. For these issues, two girder systems are designed and developed. This paper will describe the latest progress of the girder prototypes, including structure design updates, control system progress, and processing and assembling of Girder I prototype.  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2017-THPVA050  
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THPVA053 Design of the Girder Control System for HEPS-TF controls, hardware, photon, status 4560
 
  • S.J. Li, C. H. Li, J. Liu, H. Wang, Z. Wang
    IHEP, Beijing, People's Republic of China
  
  To make the alignment become easier, the HEPS-TF (High Energy Photon Source-Test Facility) magnet girder, which is different from the conventional one, is designed to achieve the goal of adjusting the girder's position and orientation online. The control system is one of the key sub-part. This Paper will describe the control system design, especially on the hardware configuration, software programming as well as user interface design.  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2017-THPVA053  
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THPVA093 Open XAL Status Report 2017 GUI, software, controls, site 4676
 
  • A.P. Zhukov, C.K. Allen, A.P. Shishlo
    ORNL, Oak Ridge, Tennessee, USA
  • D.A. Brown
    NMSU, Las Cruces, New Mexico, USA
  • Y.-C. Chao
    SLAC, Menlo Park, California, USA
  • C.P. Chu, Y. Li
    IHEP, Beijing, People's Republic of China
  • J.F. Esteban Müller, B.T. Folsom, E. Laface, Y.I. Levinsen, C. Rosati
    ESS, Lund, Sweden
  • P. Gillette, P. Laurent, E. Lécorché, G. Normand
    GANIL, Caen, France
  • I. List, M. Pavleski
    Cosylab, Ljubljana, Slovenia
  • X.H. Lu
    CSNS, Guangdong Province, People's Republic of China
  • J.E. Muller
    CERN, Geneva, Switzerland
  
  The Open XAL accelerator physics software platform is being developed through an international collaboration among several facilities since 2010 The goal of the collaboration is to establish Open XAL as a multi-purpose software platform supporting a broad range of tool and application development in accelerator physics (Open XAL also ships with a suite of general purpose accelerator applications). This paper discusses progress in beam dynamics simulation, interaction with control system and software organization. We present the current status of the project, a roadmap for continued development and an overview of the project status at each participating facility.  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2017-THPVA093  
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THPVA104 Design of New Spectrum Data Acquisition System timing, framework, data-acquisition, controls 4707
 
  • Z.X. Shao, H. Gao, W. Liu, C.Y. Pan
    USTC/NSRL, Hefei, Anhui, People's Republic of China
  
  Funding: Project supported by the National Basic Research Program of China, the National Key Scientific Instrument and Equipment Development Projects, China (2014YQ120351).
To solve the problem of spectrum acquisition in LIBS (Laser-Induced Breakdown Spectroscopy), a real-time data acquisition system was designed based on PSoC (Programmable System-On-Chip). First, the linear array CCD with electronic shutter function TCD1304DG has been used as detector .And then, the AD7621, a 16-bit analog-to-digital converter, was used to convert signal from the AFE (Analog Front End). After that, a high-integrated, low-power PSoC5LP was used as core controller, it works to complete the driver and data communication, including CCD , ADC, FIFO, the USB interface, etc. At last, a WIFI module has been added to the system for the convenience of users as well as follow-up research. The result through board-level testing indicates that the system in the spectrum acquisition is stable and accurate, and the indicators meet the LIBS project requirements. 		 
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2017-THPVA104  
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THPVA125 Status of Commissioning of Gantry 3 at the PSI PROSCAN Facility coupling, operation, controls, proton 4744
 
  • A. Koschik, J.P. Duppich, M. Eichin, P. Fernandez Carmona, A. Gerbershagen, A.L. Lomax, D. Meer, S. Safai, J.M. Schippers, D.C. Weber
    PSI, Villigen PSI, Switzerland
  
  Paul Scherrer Institute currently extends its PROSCAN facility with a third gantry treatment room - Gantry 3, which is realized in a research collaboration with Varian Medical Systems. The main research goals at the PROSCAN facility include further development of precise spot scanning and optimized beam delivery with low dead-time for treatment of moving targets. Consequently Gantry 3 is designed to feature advanced pencil beam scanning technology with a large scan field size of 30x40cm, integrated cone beam CT functionality and will in the future allow fast energy layer switching. The main challenge in realizing Gantry 3 is the integration of the Varian Gantry into the existing PROSCAN control system environment, allowing seamless beam operation. Installation of the additional treatment room has started in summer 2015 followed by the integration and technical commissioning phases of the Gantry in 2016, all during full operation of the existing treatment areas at our facility. We report about the special challenges and achieved performance results during commissioning of the Varian Gantry system in combination with the PSI PROSCAN facility.  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2017-THPVA125  
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