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Ljubljana, Slovenia

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. Source

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. Source

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. Source

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. Source

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. Source

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