IPAC2014 - List of Authors (Nordt, A.)

Paper	Title	Page
MOPME045	Overview on the Design of the Machine Protection System for ESS	472
	A. Nordt ESS, Lund, Sweden A. Apollonio, R. Schmidt CERN, Geneva, Switzerland
	Scope of the Machine Protection System (MPS) for the European Spallation Source (ESS) is to protect equipment located in the accelerator, target station, neutron instruments and conventional facilities, from damage induced by beam losses or malfunctioning equipment. The MPS design function is to inhibit beam production within a few microseconds for the fastest failures at a safety integrity level of SIL2 according to the IEC61508 standard. These requirements result from a hazard and risk analysis being performed for the all systems at ESS. In a next step the architecture and topology of the distributed machine interlock system has been developed and will be presented. At the same time as MPS seeks to protect equipment it must protect the beam by avoiding triggering false stops of beam production, leading to unnecessary downtime of the ESS facility.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-MOPME045
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THPME042	Preliminary Functional Analysis and Operating Modes of ESS 704 MHz Superconducting Radio-Frequency Linac	3317
	N. Elias, C. Darve, J. Fydrych, A. Nordt, D.P. Piso ESS, Lund, Sweden
	The European Spallation Source (ESS) is one of Europe’s largest planned research infrastructures. The project is funded by a collaboration of 17 European countries and is under design and construction in Lund, Sweden. Three families of Superconducting Radio-Frequency (SRF) cavities are being prototyped, counting the spoke resonators with a geometric beta of 0.5, medium-beta elliptical cavities (β=0.67) and high beta elliptical cavities (β=0.86). The ESS linac will produce 2.86 ms long proton pulses with a repetition rate of 14 Hz (4 % duty cycle), a beam current of 62.5 mA and an average beam power of 5 MW. A control system is being developed to operate the different accelerator systems. All operating modes of the superconducting linac shall ensure a safe operation of the accelerator. This paper presents the preliminary functional analysis and the operating modes of the 704 MHz SRF linac.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-THPME042
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THPRI019	Reliability and Availability Modeling for Accelerator Driven Facilities	3803
	O. Rey Orozko, E. Bargalló, A. Nordt ESS, Lund, Sweden A. Apollonio, R. Schmidt CERN, Geneva, Switzerland
	Accelerator driven facilities are and will have to be designed to a very high level of reliability and beam availability to meet expectations of the users and experiments. In order to fulfill these demanding requirements on reliability and overall beam availability, statistical models have been developed. We compare different statistical reliability models as well as tools in terms of their performance, capacity and user-friendliness. In addition we also benchmarked some of the existing models. We will present in detail a tool being used for LHC and LINAC4 which is based on the commercially available software package Isograph and a tool using Excel, which was developed in house for ESS-systems. The impact of an early reliability modeling on the design of mission critical systems will be presented as well.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-THPRI019
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Paper

Title

Page

Overview on the Design of the Machine Protection System for ESS

472

A. Nordt
ESS, Lund, Sweden
A. Apollonio, R. Schmidt
CERN, Geneva, Switzerland

Scope of the Machine Protection System (MPS) for the European Spallation Source (ESS) is to protect equipment located in the accelerator, target station, neutron instruments and conventional facilities, from damage induced by beam losses or malfunctioning equipment. The MPS design function is to inhibit beam production within a few microseconds for the fastest failures at a safety integrity level of SIL2 according to the IEC61508 standard. These requirements result from a hazard and risk analysis being performed for the all systems at ESS. In a next step the architecture and topology of the distributed machine interlock system has been developed and will be presented. At the same time as MPS seeks to protect equipment it must protect the beam by avoiding triggering false stops of beam production, leading to unnecessary downtime of the ESS facility.

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-MOPME045

Export •

reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

THPME042

Preliminary Functional Analysis and Operating Modes of ESS 704 MHz Superconducting Radio-Frequency Linac

3317

N. Elias, C. Darve, J. Fydrych, A. Nordt, D.P. Piso
ESS, Lund, Sweden

The European Spallation Source (ESS) is one of Europe’s largest planned research infrastructures. The project is funded by a collaboration of 17 European countries and is under design and construction in Lund, Sweden. Three families of Superconducting Radio-Frequency (SRF) cavities are being prototyped, counting the spoke resonators with a geometric beta of 0.5, medium-beta elliptical cavities (β=0.67) and high beta elliptical cavities (β=0.86). The ESS linac will produce 2.86 ms long proton pulses with a repetition rate of 14 Hz (4 % duty cycle), a beam current of 62.5 mA and an average beam power of 5 MW. A control system is being developed to operate the different accelerator systems. All operating modes of the superconducting linac shall ensure a safe operation of the accelerator. This paper presents the preliminary functional analysis and the operating modes of the 704 MHz SRF linac.

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-THPME042

Export •

reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

THPRI019

Reliability and Availability Modeling for Accelerator Driven Facilities

3803

O. Rey Orozko, E. Bargalló, A. Nordt
ESS, Lund, Sweden
A. Apollonio, R. Schmidt
CERN, Geneva, Switzerland

Accelerator driven facilities are and will have to be designed to a very high level of reliability and beam availability to meet expectations of the users and experiments. In order to fulfill these demanding requirements on reliability and overall beam availability, statistical models have been developed. We compare different statistical reliability models as well as tools in terms of their performance, capacity and user-friendliness. In addition we also benchmarked some of the existing models. We will present in detail a tool being used for LHC and LINAC4 which is based on the commercially available software package Isograph and a tool using Excel, which was developed in house for ESS-systems. The impact of an early reliability modeling on the design of mission critical systems will be presented as well.

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-THPRI019

Export •

reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)