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Tavcar R.,Cosylab | Dedic J.,Cosylab | Erjavec K.,Cosylab | Modic R.,Cosylab | And 2 more authors.
IPAC 2016 - Proceedings of the 7th International Particle Accelerator Conference | Year: 2016

This article presents a machine interlock system (MIS), designed and developed in collaboration between SINAP and Cosylab. The design is based on the experience and requirements of different accelerator facilities around the world, with the goal of providing, out of the box, the flexibility, reliability, availability, determinism, response speed, etc., which facilities need for a Machine Protection System (MPS). The goal of the MIS platform is to provide a reliable tool, which covers all the common MIS behaviour, required by an MPS designer. The system is based on a proven hardware platform, uses radiationtolerant FPGAS, has built-in redundancies for power supply, hardware components and logic and is configurable from EPICS. We present several design principles that were used and explain the features and principles of application. Furthermore, we present the system architecture, from hardware and firmware to software. The MIS system is currently being installed at the BNCT facility at the Ibaraki Neutron Medical Research Center in Japan and is planned in the treatment interlock system of AP-TRON, the Advanced Proton Therapy Facility in Shanghai, China. Copyright © 2016 CC-BY-3.0 and by the respective authors.


Laface E.,European Spallation Source ERIC | Levinsen Y.I.,European Spallation Source ERIC | List I.,Cosylab | Pelaia T.,Oak Ridge National Laboratory
IPAC 2016 - Proceedings of the 7th International Particle Accelerator Conference | Year: 2016

The ESS Linac Simulator (ELS) is the model that will be used at the European Spallation Source ERIC in Lund, Sweden, to simulate the transport of the beam envelope for the operations. During the machine restart in August 2015 at the Spallation Neutron Source (SNS) in Oak Ridge, USA, we were able to perform the first benchmarking studies of the ELS. In this paper, we present the results of the phase-scans performed in four RF cavities of the coupled-cavity linac at SNS compared with the same scans simulated in the ELS. The phase of the cavity was modified while the phase of the beam was recorded in two BPMs downstream from the cavity. This measurement was repeated for four independent cavities and the results are compared here with the model, which favourably reproduces the BPM response to the cavity scans. Copyright © 2016 CC-BY-3.0 and by the respective authors.


Iskra I.,Jozef Stefan Institute | Detela A.,Jozef Stefan Institute | Virsek M.,Jozef Stefan Institute | Nemanic V.,Jozef Stefan Institute | And 4 more authors.
Applied Physics Letters | Year: 2010

A capacitive-type counter of nanoparticles in air, based on measurement of the capacitance of a capacitor with a variable dielectric part, has been developed. The method is suitable for detection of aerosols in a wide concentration range, regardless of shape or chemical composition. The method is demonstrated experimentally and verified by numerical simulations. The counter allows for construction of a simple, portable, and cheap nanoparticle detector for air quality control. © 2010 American Institute of Physics.


Rescic M.,Cosylab | Fernandez L.,ESS | Nordt A.,ESS
IPAC 2013: Proceedings of the 4th International Particle Accelerator Conference | Year: 2013

The stakeholders of the European Spallation Source (ESS) Integrated Control System (ICS) reside in four main parts of the ESS facility: Accelerator, target, neutron instruments and conventional facilities. In order to maintain and support the standardised hardware and software platforms for controls all of the stakeholders' integration requirements and efforts must be strictly harmonised. This called for a decision by the ICS to perform the majority of the work in a package titled 'Integration Support', ranging from FPGA code development to EPICS integration. This exposes a high number of interfacing systems and devices. Planning of such activities for each system makes the standard waterfall planning model highly inefficient and risky. In order to properly address the planning risks the agile methodology is proposed - from product owners and teams to scrums and sprints, everything to offer a better and more efficient integration support to controls stakeholders.


Laface E.,ESS Lund | Rescic M.,Cosylab
IPAC 2012 - International Particle Accelerator Conference 2012 | Year: 2012

The European Spallation Source will be a 5 MW superconducting proton linac, with fixed target, for the production of a stream of neutrons. The entire machine, the target and all the instruments will be controlled by an Integrated Control System: this is a set of hardware and software tools created to provide the most possible easy and flexible interface for the operator daily usage in the control room. The hardware core of the Integrated Control System is the Control Box, a Linux-based computer designed to provide a common platform for the ESS hardware developers. The software front-end for the Control Box is the Experimental Physics and Industrial Control System - EPICS, a standard protocol used to control large facilities such as accelerators or nuclear power plants. In this paper the main characteristics of the Control Box and the EPICS system are presented. Copyright © 2012 by IEEE.


Tavcar R.,Cosylab | Stefanic R.,Cosylab | Kroflic Z.,Cosylab | Dedic J.,Cosylab | Gutleber J.,CERN
IPAC 2011 - 2nd International Particle Accelerator Conference | Year: 2011

MedAustron is a new particle accelerator-based ion beam research and therapy centre under construction in Wiener Neustadt, Austria. The timing system for its synchrotron-based accelerator is being developed in close collaboration with Cosylab. We have used Micro Research Finland (MRF) transfer layer and designed and implemented a generic, reusable high-level logic above transport layer inside the generator and receiver FPGA to fulfill machine specific requirements which exceed MRF's original high-level logic capabilities. The new timing system is suitable for small to mid-size accelerators. Its functionalities include support for virtual accelerators and a rich selection of event response mechanisms. The timing system uses a combination of a real-time link for downstream events and a non-real-time link for upstream messaging and non time-critical communication. This article explains the benefits of building a timing system on a proven, stable timing transport layer and describes the high-level services provided by MedAustron timing system. Copyright © 2011 by IPAC'11/EPS-AG.


Einfeld D.,Lund University | Plesko M.,COSYLAB | Schaper J.,HAWK University of Applied Sciences and Arts
Journal of Synchrotron Radiation | Year: 2014

By the beginning of 1990, three third-generation synchrotron light sources had been successfully commissioned in Grenoble, Berkeley and Trieste (ESRF, ALS and ELETTRA). Each of these new machines reached their target specifications without any significant problems. In parallel, already at that time discussions were underway regarding the next generation, the 'diffraction-limited light source (DLSR)', which featured sub-nmrad electron beam emittance, photon beam brilliance exceeding 10 22 and the potential to emit coherent radiation. Also, at about that time, a first design for a 3GeV DLSR was developed, based on a modified multiple-bend achromat (MBA) design leading to a lattice with normalized emittance of x = 0.5nmrad. The novel feature of the MBA lattice was the use of seven vertically focusing bend magnets with different bending angles throughout the achromat cell to keep the radiation integrals and resulting beam emittance low. The baseline design called for a 400m ring circumference with 12 straight sections of 6m length. The dynamic aperture behaviour of the DLSR lattice was estimated to produce >5h beam lifetime at 100mA stored beam current. © 2014 International Union of Crystallography.


Hassanzadegan H.,European Spallation Source ESS AB | Jansson A.,European Spallation Source ESS AB | StrnisJa K.,Cosylab.
IBIC 2013: Proceedings of the 2nd International Beam Instrumentation Conference | Year: 2013

The ESS Linac will include in total 21 Beam Current Monitors, mostly of ACCT type, to measure the average current over the 2.86 ms beam pulse, the pulse charge and the pulse profile. It is also planned to use a few Fast Current Transformers to check the performance of the fast beam choppers with a rise time as short as 10 ns. In addition to the absolute current measurement, the BCM system needs to measure the differential beam current and act on the Machine Interlock System if the difference exceeds some thresholds. The differential current measurement is particularly important in the low energy part of the Linac, where Beam Loss Monitors cannot reliably detect beam losses. This paper gives an overview of the ESS BCM system and presents some preliminary test results with a commercial ACCT and MTCA.4 electronics. Copyright © 2013 by JACoW.


List I.,Cosylab | Laface E.,European Spallation Source
IPAC 2014: Proceedings of the 5th International Particle Accelerator Conference | Year: 2014

TraceWin [1] is used at the European Spallation Source (ESS) as the design tool, while fast and accurate on-line models will be needed during the operations. Three models are compared: the ESS Linac Simulator (ELS) [2], TraceWin and the OpenXAL [3]. In all of the benchmarked models, dynamics of each beam-line element is, to the first order, represented by a transfer matrix. Differences in the matrices occur, since different reference frames are used and as well different assumptions about the energy of the particles are made. General transformations of the reference frames will be presented. Using those, the comparison of transfer maps among TraceWin and OpenXAL are given. When the differences between TraceWin and OpenXAL were unclear, the benchmark versus other code, like MAD-X [4] and Dynac [5] was done. The best implementations were combined into a new on-line model implementation Java ELS (or JELS) and at last the comparison of the latter with TraceWin is given. Copyright © 2014 CC-BY-3.0 and by the respective authors.


PubMed | COSYLAB, Lund University and HAWK University of Applied Sciences and Arts
Type: Journal Article | Journal: Journal of synchrotron radiation | Year: 2014

By the beginning of 1990, three third-generation synchrotron light sources had been successfully commissioned in Grenoble, Berkeley and Trieste (ESRF, ALS and ELETTRA). Each of these new machines reached their target specifications without any significant problems. In parallel, already at that time discussions were underway regarding the next generation, the `diffraction-limited light source (DLSR), which featured sub-nmrad electron beam emittance, photon beam brilliance exceeding 10(22) and the potential to emit coherent radiation. Also, at about that time, a first design for a 3GeV DLSR was developed, based on a modified multiple-bend achromat (MBA) design leading to a lattice with normalized emittance of x = 0.5nmrad. The novel feature of the MBA lattice was the use of seven vertically focusing bend magnets with different bending angles throughout the achromat cell to keep the radiation integrals and resulting beam emittance low. The baseline design called for a 400m ring circumference with 12 straight sections of 6m length. The dynamic aperture behaviour of the DLSR lattice was estimated to produce >5h beam lifetime at 100mA stored beam current.

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