Keyword: ion-source
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MOPKS003 High Resolution Ion Beam Profile Measurement System ion, target, LabView, detector 164
  • J.G. Lopes
    ISEL, Lisboa, Portugal
  • F.A. Corrêa Alegria
    IT, Lisboa, Portugal
  • J.G. Lopes, L.M. Redondo
    CFNUL, Lisboa, Portugal
  • J. Rocha
    ITN, Sacavém, Portugal
  A high resolution system designed for measuring the ion beam profile in the ion implanter installed at the Ion Beam Laboratory of the Technological Nuclear Institute (ITN) is described. Low energy, high current ion implantation is becoming increasingly important in todays technology. In order to achieve this, the use of electrostatic lens to decelerate a focused ion beam is essential, but one needs to measure, with high resolution, the 2D beam profile. Traditional beam profile monitors using a matrix of detectors, like Faraday Cups, were used. They are, in essence, discrete systems since they only measure the beam intensity in fixed positions. In order to increase the resolution further, a new system was developed that does a continuous measurement of the profile, made of a circular aluminum disc with a curved slit which extends approximately from the center of the disc to its periphery. The disc is attached to the ion implanter target, which is capable of rotating on its axis. A cooper wire, positioned behind the slit, works like a Faraday Cup and the current generated, proportional to the beam intensity, is measured. As the ion implanter is capable of scanning the beam over the target, the combination of vertical beam scanning with aluminum disc rotation allows the beam profile to be measured continuously in two dimensions. Hence, the developed system including the computer controlled positioning of the beam over the moving curved slit, the data acquisition and the beam profile representation, is described.  
poster icon Poster MOPKS003 [0.744 MB]  
MOPMN005 ProShell – The MedAustron Accelerator Control Procedure Framework interface, controls, ion, framework 246
  • R. Moser, A.B. Brett, M. Marchhart, C. Torcato de Matos
    EBG MedAustron, Wr. Neustadt, Austria
  • J. Dedič, S. Sah
    Cosylab, Ljubljana, Slovenia
  • J. Gutleber
    CERN, Geneva, Switzerland
  MedAustron is a centre for ion-therapy and research in currently under construction in Austria. It features a synchrotron particle accelerator for proton and carbon-ion beams. This paper presents the architecture and concepts for implementing a procedure framework called ProShell. Procedures to automate high level control and analysis tasks for commissioning and during operation are modelled with Petri-Nets and user code is implemented with C#. It must be possible to execute procedures and monitor their execution progress remotely. Procedures include starting up devices and subsystems in a controlled manner, configuring, operating O(1000) devices and tuning their operational settings using iterative optimization algorithms. Device interfaces must be extensible to accommodate yet unanticipated functionalities. The framework implements a template for procedure specific graphical interfaces to access device specific information such as monitoring data. Procedures interact with physical devices through proxy software components that implement one of the following interfaces: (1) state-less or (2) state-driven device interface. Components can extend these device interfaces following an object-oriented single inheritance scheme to provide augmented, device-specific interfaces. As only two basic device interfaces need to be defined at an early project stage, devices can be integrated gradually as commissioning progresses. We present the architecture and design of ProShell and explain the programming model by giving the simple example of the ion source spectrum analysis procedure.  
poster icon Poster MOPMN005 [0.948 MB]  
MOPMU007 ISHN Ion Source Control System Overview controls, EPICS, ion, operation 436
  • M. Eguiraun, I. Arredondo, J. Feuchtwanger, G. Harper, M. del Campo
    ESS-Bilbao, Zamudio, Spain
  • J. Jugo
    University of the Basque Country, Faculty of Science and Technology, Bilbao, Spain
  • S. Varnasseri
    ESS Bilbao, LEIOA, Spain
  Funding: The present work is supported by the Basque Government and Spanish Ministry of Science and Innovation.
ISHN project consists of a Penning ion source which will deliver up to 65mA of H beam pulsed at 50 Hz with a diagnostics vessel for beam testing purposes. The present work analyzes the control system of this research facility. The main devices of ISHN are the power supplies for high density plasma generation and beam extraction, the H2 supply and Cesium heating system, plus refrigeration, vacuum and monitoring devices. The control system implemented with LabVIEW is based on PXI systems from National Instruments, using two PXI chassis connected through a dedicated fiber optic link between HV platform and ground. Source operation is managed by a real time processor at ground, while additional tasks are performed by means of an FPGA located at HV. The real time system manages the control loop of heaters, the H2 pulsed supply for a stable pressure in the plasma chamber, data acquisition from several diagnostics and sensors and the communication with the control room. The FPGA generates the triggers for the different power supplies and H2 flow as well as some data acquisition at high voltage. A PLC is in charge of the vacuum control (two double stage pumps and two turbo pumps), and it is completely independent of the source operation for avoiding risky failures. A dedicated safety PLC is installed to handle personnel safety issues. Current running diagnostics are, ACCT, DCCT, Faraday Cup and a pepperpot. In addition, a MySQL database stores the whole operation parameters while source is running. The aim is to test and train in accelerator technologies for future developments.
poster icon Poster MOPMU007 [1.382 MB]