IPAC2016 - List of Authors (Laface, E.)

Paper	Title	Page
WEPOR049	Jupyterhub at the ESS. An Interactive Python Computing Environment for Scientists and Engineers	2778
	L. Fernández, R. Andersson, H. Hagenrud, T. Korhonen, E. Laface ESS, Lund, Sweden B. Zupanc Cosylab, Ljubljana, Slovenia
	The European Spallation Source will be the world's most powerful neutron source, once its construction is finished. In order to design, build and operate this complex machine many different software components and frameworks will be needed. One of those is Jupyterhub, a scripting environment for data analysis, scientific computing and physics simulations. Jupyterhub is a multiuser version of the IPython notebook (Jupyter) that can be deployed in a centralized server; It provides centralized authentication, centralized deployment, promotes collaboration and provides access to the most advanced libraries for data cleaning and transformation, simulation and statistics. At the Integrated Controls System Division a customized version of Jupyterhub was deployed, providing sandboxed environments to users using Docker containers. Among other characteristics of this installation we can find: clustering, load balancing, A/B testing, Amazon Web Services integration, nbviewer and OpenXAL integration.
DOI •	reference for this paper ※ DOI:10.18429/JACoW-IPAC2016-WEPOR049
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WEPOY041	Fast Tracking of Nonlinear Dynamics in the ESS Linac Simulator via Particle-Count Invariance	3080
SUPSS063	use link to see paper's listing under its alternate paper code
	B.T. Folsom, E. Laface ESS, Lund, Sweden
	Real-time beam modeling has been used in accelerator diagnostics for several decades. Along the way, the theory for matrix calculations of linear forces has matured, allowing for fast calculations of a beam's momentum and position distributions. This formalism becomes complicated and ultimately breaks down with high-order beam elements like sextupoles. Such elements can be accurately modeled with a Lie-algebra approach, but these techniques are generally implemented in slower, offline multiparticle tracking software. Here, we demonstrate an adaptation of the conventional Lie techniques for rapid first-order tracking of position, which is accomplished by treating a bunch's particle count as an invariant.
DOI •	reference for this paper ※ DOI:10.18429/JACoW-IPAC2016-WEPOY041
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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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Paper

Title

Page

Jupyterhub at the ESS. An Interactive Python Computing Environment for Scientists and Engineers

2778

L. Fernández, R. Andersson, H. Hagenrud, T. Korhonen, E. Laface
ESS, Lund, Sweden
B. Zupanc
Cosylab, Ljubljana, Slovenia

The European Spallation Source will be the world's most powerful neutron source, once its construction is finished. In order to design, build and operate this complex machine many different software components and frameworks will be needed. One of those is Jupyterhub, a scripting environment for data analysis, scientific computing and physics simulations. Jupyterhub is a multiuser version of the IPython notebook (Jupyter) that can be deployed in a centralized server; It provides centralized authentication, centralized deployment, promotes collaboration and provides access to the most advanced libraries for data cleaning and transformation, simulation and statistics. At the Integrated Controls System Division a customized version of Jupyterhub was deployed, providing sandboxed environments to users using Docker containers. Among other characteristics of this installation we can find: clustering, load balancing, A/B testing, Amazon Web Services integration, nbviewer and OpenXAL integration.

DOI •

reference for this paper ※ DOI:10.18429/JACoW-IPAC2016-WEPOR049

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

WEPOY041

Fast Tracking of Nonlinear Dynamics in the ESS Linac Simulator via Particle-Count Invariance

3080

SUPSS063

use link to see paper's listing under its alternate paper code

B.T. Folsom, E. Laface
ESS, Lund, Sweden

Real-time beam modeling has been used in accelerator diagnostics for several decades. Along the way, the theory for matrix calculations of linear forces has matured, allowing for fast calculations of a beam's momentum and position distributions. This formalism becomes complicated and ultimately breaks down with high-order beam elements like sextupoles. Such elements can be accurately modeled with a Lie-algebra approach, but these techniques are generally implemented in slower, offline multiparticle tracking software. Here, we demonstrate an adaptation of the conventional Lie techniques for rapid first-order tracking of position, which is accomplished by treating a bunch's particle count as an invariant.

DOI •

reference for this paper ※ DOI:10.18429/JACoW-IPAC2016-WEPOY041

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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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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

Export •

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