IPAC2016 - List of Authors (Levinsen, Y.I.)

Paper	Title	Page
MOPOY045	ESS Linac Beam Physics Design Update	947
	M. Eshraqi, H. Danared, R. De Prisco, A. Jansson, Y.I. Levinsen, M. Lindroos, R. Miyamoto, M. Muñoz, A. Ponton ESS, Lund, Sweden
	The European Spallation Source, ESS, uses a linear accelerator to bombard the tungsten target with the high intensity protons beam for producing intense beams of neutrons. The nominal average beam power of the linac is 5~MW with a peak beam power at target of 125~MW. This paper focuses on the beam dynamics design of the ESS linac and the diagnostics elements used for the tuning of the lattice and matching between sections.
DOI •	reference for this paper ※ DOI:10.18429/JACoW-IPAC2016-MOPOY045
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TUPMR020	In-depth Analysis and Optimization of the European Spallation Source Front End Lattice	1274
	Y.I. Levinsen, M. Eshraqi ESS, Lund, Sweden L. Celona, L. Neri INFN/LNS, Catania, Italy
	The European Spallation Source front end will deliver a 62.5 mA beam current of 2.8 ms duration at 352 MHz to the downstream linac, which in turn will produce a 5 MW proton beam onto the target. Such unprecedented beam power requires a high quality beam with accurate and stable beam parameters in order to assure low beam losses and safe transport through the linac. In this paper we present advanced tuning methods for the low energy beam transport and the radio frequency quadrupole.
DOI •	reference for this paper ※ DOI:10.18429/JACoW-IPAC2016-TUPMR020
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WEPOY042	Open XAL Status Report 2016	3083
	T.A. Pelaia II, C.K. Allen, A.P. Shishlo, A.P. Zhukov ORNL, Oak Ridge, Tennessee, USA D.A. Brown NMSU, Las Cruces, New Mexico, USA Y.-C. Chao TRIUMF, Canada's National Laboratory for Particle and Nuclear Physics, Vancouver, Canada C.P. Chu, Y. Zhang FRIB, East Lansing, Michigan, USA P. Gillette, P. Laurent, E. Lécorché, G. Normand GANIL, Caen, France E. Laface, Y.I. Levinsen, M. Muñoz ESS, Lund, Sweden Y. Li IHEP, Beijing, People's Republic of China I. List, M. Pavleski Cosylab, Ljubljana, Slovenia X.H. Lu CSNS, Guangdong Province, People's Republic of China
	Funding: This manuscript has been authored by UT-Battelle, LLC, under Contract No. DE-AC0500OR22725 with the U.S. Department of Energy. Formed in 2010, the Open XAL accelerator physics software platform was developed through an international collaboration among several facilities to establish it as a standard for accelerator physics software. While active development continues, the project has now matured. This paper presents 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 ※ DOI:10.18429/JACoW-IPAC2016-WEPOY042
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WEPOY043	Plans for the European Spallation Source Beam Physics Control Software	3086
	Y.I. Levinsen, R. De Prisco, M. Eshraqi, E. Laface, R. Miyamoto, M. Muñoz ESS, Lund, Sweden I. List Cosylab, Ljubljana, Slovenia
	The commissioning and operations planning for the European Spallation Source is currently being defined. It is foreseen that the ESS will begin to deliver beam on target by mid 2019, something which is urging a well structured and thought through plan both for commissioning and operations. In this paper we will discuss the plans for beam physics operational software, priorities and software services needed during the different stages of beam commissioning.
DOI •	reference for this paper ※ DOI:10.18429/JACoW-IPAC2016-WEPOY043
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THPMB037	Comparing the Transverse Dynamics of the ESS Linac Simulator and the Spallation Neutron Source Linac	3314
	E. Laface, Y.I. Levinsen ESS, Lund, Sweden T.A. Pelaia II ORNL, Oak Ridge, Tennessee, USA
	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 during operations. On August 12th 2015, we had the opportunity to use two hours of beam time in the linac of the Spallation Neutron Source in Oak Ridge to benchmark ELS. In this paper we present the results of the transverse dynamics measurements. Such measurements are obtained upon kicking the beam in the medium-energy beam transport (MEBT) and measuring the effect of the oscillation of the beam centroid in 58 beam position monitors (BPMs). The ELS model and these measurements are in agreement with an average discrepancy of 4% in the superconducting section of the accelerator.
DOI •	reference for this paper ※ DOI:10.18429/JACoW-IPAC2016-THPMB037
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THPMB038	Comparing RF-Cavity Phase-Scan Simulations in the ESS Linac Simulator with Measurements Taken in the Spallation Neutron Source Coupled-Cavity Linac	3317
	E. Laface, Y.I. Levinsen ESS, Lund, Sweden I. List Cosylab, Ljubljana, Slovenia T.A. Pelaia II ORNL, Oak Ridge, Tennessee, USA
	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.
DOI •	reference for this paper ※ DOI:10.18429/JACoW-IPAC2016-THPMB038
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THPMB039	Voltage Error Studies in the ESS RFQ	3320
	A. Ponton, Y.I. Levinsen, E. Sargsyan ESS, Lund, Sweden A.C. France, O. Piquet, B. Pottin CEA/IRFU, Gif-sur-Yvette, France
	During the fabrication of an RFQ, deviation from the perfect geometry will occur during assembling, brazing and machining the different parts. These geometrical defects will impact the theoretical inter-vane voltage, given by the beam dynamics, by altering the quadrupolar component as well as adding dipolar terms in the voltage function. Tuners can correct partially the effect of the manufacturing. The study summarizes the effects of the voltage errors on the beam quality in the case of the ESS RFQ with a harmonic analysis of the voltage function. We discuss the acceptable level of voltage errors and associated mechanical tolerances.
DOI •	reference for this paper ※ DOI:10.18429/JACoW-IPAC2016-THPMB039
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FRYAA02	ESS Progressing into Construction	4266
	M. Lindroos, H. Danared, M. Eshraqi, R. Garoby, A. Jansson, Y.I. Levinsen, C.A. Martins, A. Ponton ESS, Lund, Sweden
	The construction of the European Spallation Source, ESS, started in summer 2014. At the site in Lund, the accelerator tunnel will be completed at the time of IPAC16, while prototyping and manufacturing or prepara-tions for manpower contributions are going on in more 23 laboratories distributed over the 12 European countries collaborating on the accelerator project. Major technical milestones have been reached include the testing of su-perconducting cavity prototypes of two families to values above design gradients, the first ESS modulator has been tested to 90 kV and the first klystron prototype has been received in April 2016. Equally important developments are taking place at many partner laboratories. The presen-tation will summarize the status of the ESS accelerator project by the time of IPAC16..
	Slides FRYAA02 [66.734 MB]
DOI •	reference for this paper ※ DOI:10.18429/JACoW-IPAC2016-FRYAA02
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Paper

Title

Page

ESS Linac Beam Physics Design Update

947

M. Eshraqi, H. Danared, R. De Prisco, A. Jansson, Y.I. Levinsen, M. Lindroos, R. Miyamoto, M. Muñoz, A. Ponton
ESS, Lund, Sweden

The European Spallation Source, ESS, uses a linear accelerator to bombard the tungsten target with the high intensity protons beam for producing intense beams of neutrons. The nominal average beam power of the linac is 5~MW with a peak beam power at target of 125~MW. This paper focuses on the beam dynamics design of the ESS linac and the diagnostics elements used for the tuning of the lattice and matching between sections.

DOI •

reference for this paper ※ DOI:10.18429/JACoW-IPAC2016-MOPOY045

Export •

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

TUPMR020

In-depth Analysis and Optimization of the European Spallation Source Front End Lattice

1274

Y.I. Levinsen, M. Eshraqi
ESS, Lund, Sweden
L. Celona, L. Neri
INFN/LNS, Catania, Italy

The European Spallation Source front end will deliver a 62.5 mA beam current of 2.8 ms duration at 352 MHz to the downstream linac, which in turn will produce a 5 MW proton beam onto the target. Such unprecedented beam power requires a high quality beam with accurate and stable beam parameters in order to assure low beam losses and safe transport through the linac. In this paper we present advanced tuning methods for the low energy beam transport and the radio frequency quadrupole.

DOI •

reference for this paper ※ DOI:10.18429/JACoW-IPAC2016-TUPMR020

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WEPOY042

Open XAL Status Report 2016

3083

T.A. Pelaia II, C.K. Allen, A.P. Shishlo, A.P. Zhukov
ORNL, Oak Ridge, Tennessee, USA
D.A. Brown
NMSU, Las Cruces, New Mexico, USA
Y.-C. Chao
TRIUMF, Canada's National Laboratory for Particle and Nuclear Physics, Vancouver, Canada
C.P. Chu, Y. Zhang
FRIB, East Lansing, Michigan, USA
P. Gillette, P. Laurent, E. Lécorché, G. Normand
GANIL, Caen, France
E. Laface, Y.I. Levinsen, M. Muñoz
ESS, Lund, Sweden
Y. Li
IHEP, Beijing, People's Republic of China
I. List, M. Pavleski
Cosylab, Ljubljana, Slovenia
X.H. Lu
CSNS, Guangdong Province, People's Republic of China

Funding: This manuscript has been authored by UT-Battelle, LLC, under Contract No. DE-AC0500OR22725 with the U.S. Department of Energy.
Formed in 2010, the Open XAL accelerator physics software platform was developed through an international collaboration among several facilities to establish it as a standard for accelerator physics software. While active development continues, the project has now matured. This paper presents 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 ※ DOI:10.18429/JACoW-IPAC2016-WEPOY042

Export •

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

WEPOY043

Plans for the European Spallation Source Beam Physics Control Software

3086

Y.I. Levinsen, R. De Prisco, M. Eshraqi, E. Laface, R. Miyamoto, M. Muñoz
ESS, Lund, Sweden
I. List
Cosylab, Ljubljana, Slovenia

The commissioning and operations planning for the European Spallation Source is currently being defined. It is foreseen that the ESS will begin to deliver beam on target by mid 2019, something which is urging a well structured and thought through plan both for commissioning and operations. In this paper we will discuss the plans for beam physics operational software, priorities and software services needed during the different stages of beam commissioning.

DOI •

reference for this paper ※ DOI:10.18429/JACoW-IPAC2016-WEPOY043

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

THPMB037

Comparing the Transverse Dynamics of the ESS Linac Simulator and the Spallation Neutron Source Linac

3314

E. Laface, Y.I. Levinsen
ESS, Lund, Sweden
T.A. Pelaia II
ORNL, Oak Ridge, Tennessee, USA

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 during operations. On August 12th 2015, we had the opportunity to use two hours of beam time in the linac of the Spallation Neutron Source in Oak Ridge to benchmark ELS. In this paper we present the results of the transverse dynamics measurements. Such measurements are obtained upon kicking the beam in the medium-energy beam transport (MEBT) and measuring the effect of the oscillation of the beam centroid in 58 beam position monitors (BPMs). The ELS model and these measurements are in agreement with an average discrepancy of 4% in the superconducting section of the accelerator.

DOI •

reference for this paper ※ DOI:10.18429/JACoW-IPAC2016-THPMB037

Export •

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

THPMB038

Comparing RF-Cavity Phase-Scan Simulations in the ESS Linac Simulator with Measurements Taken in the Spallation Neutron Source Coupled-Cavity Linac

3317

E. Laface, Y.I. Levinsen
ESS, Lund, Sweden
I. List
Cosylab, Ljubljana, Slovenia
T.A. Pelaia II
ORNL, Oak Ridge, Tennessee, USA

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.

DOI •

reference for this paper ※ DOI:10.18429/JACoW-IPAC2016-THPMB038

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

THPMB039

Voltage Error Studies in the ESS RFQ

3320

A. Ponton, Y.I. Levinsen, E. Sargsyan
ESS, Lund, Sweden
A.C. France, O. Piquet, B. Pottin
CEA/IRFU, Gif-sur-Yvette, France

During the fabrication of an RFQ, deviation from the perfect geometry will occur during assembling, brazing and machining the different parts. These geometrical defects will impact the theoretical inter-vane voltage, given by the beam dynamics, by altering the quadrupolar component as well as adding dipolar terms in the voltage function. Tuners can correct partially the effect of the manufacturing. The study summarizes the effects of the voltage errors on the beam quality in the case of the ESS RFQ with a harmonic analysis of the voltage function. We discuss the acceptable level of voltage errors and associated mechanical tolerances.

DOI •

reference for this paper ※ DOI:10.18429/JACoW-IPAC2016-THPMB039

Export •

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

FRYAA02

ESS Progressing into Construction

4266

M. Lindroos, H. Danared, M. Eshraqi, R. Garoby, A. Jansson, Y.I. Levinsen, C.A. Martins, A. Ponton
ESS, Lund, Sweden

The construction of the European Spallation Source, ESS, started in summer 2014. At the site in Lund, the accelerator tunnel will be completed at the time of IPAC16, while prototyping and manufacturing or prepara-tions for manpower contributions are going on in more 23 laboratories distributed over the 12 European countries collaborating on the accelerator project. Major technical milestones have been reached include the testing of su-perconducting cavity prototypes of two families to values above design gradients, the first ESS modulator has been tested to 90 kV and the first klystron prototype has been received in April 2016. Equally important developments are taking place at many partner laboratories. The presen-tation will summarize the status of the ESS accelerator project by the time of IPAC16..

Slides FRYAA02 [66.734 MB]

DOI •

reference for this paper ※ DOI:10.18429/JACoW-IPAC2016-FRYAA02

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