IPAC2017 - List of Authors (Midttun, O.)

Paper	Title	Page
MOPAB023	ESS Emittance Measurements at INFN CATANIA	123
	O. Tuske, P. Daniel-Thomas, J.F. Denis, Y. Gauthier, T.J. Joannem, N. Misiara, V. Nadot, G. Perreu, F. Senée, V. Silva CEA/IRFU, Gif-sur-Yvette, France L. Celona, L. Neri INFN/LNS, Catania, Italy B. Cheymol, T.J. Shea ESS, Lund, Sweden I. Chu, M. Monteremand CEA LITEN, CEA Grenoble, Grenoble, France Ø. Midttun University of Bergen, Bergen, Norway T.V. Vacher CEA/DSM/IRFU, France
	Beam characteristics at low energy are an absolute necessity for an acceptable injection in the next stage of a linear accelerator, and are also necessary to reduce beam loss and radiation inside the machine. CEA is taking part of ESS linac construction, by designing Emittance Measurement Units (EMU) for the Low Energy Beam Transport (LEBT). The EMU are designed to qualify the proton beam produced by the INFN Catania ion source. This measurement has been decided to be time resolved, allowing to follow the beam emittance reduction, during the pulse length. A 1Mhz acquisition board controlled by EPICS save raw datas to an archiver in order to be able to post process the measurements for time resolution. The design corresponds to an Allison's scanner, using entrance and exit slits, electrostatic plates and a faraday cup. The beamstopper protects the device and can be removable to fit to beam power. It has been manufactured by the CEA/LITEN with copper tungsten HIP technique. This article report the first measurements on the ESS injector at INFN CATANIA.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2017-MOPAB023
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MOPVA037	Development and Commissioning of the Doppler-Shift Unit for the Measurement of the Ion Species Fractions and Beam Energy of the ESS Proton Source	936
	C.A. Thomas, T.J. Shea ESS, Lund, Sweden J. Fils GSI, Darmstadt, Germany Y. Lussignol, P. Mattei CEA/DSM/IRFU, France Ø. Midttun University of Bergen, Bergen, Norway L. Neri INFN/LNS, Catania, Italy F. Senée, O. Tuske CEA/IRFU, Gif-sur-Yvette, France
	ESS proton source is in going to be soon delivered to the ESS project. In order to qualify the source, a series of beam instrumentation diagnostics have been designed and produced. In particular, a specific spectrograph dedicated to the fraction species measurement is currently commissioned. This instrument not only is capable of measuring the fraction species produced by the source, but also it can measure their energy and energy spread, the mass of the different species, and additional spectral rays coming from the gas species in presence in the vacuum chamber. We present in this paper the commissioning of this instrument, the Doppler Shift unit, dedicated to the measurement of the fraction species.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2017-MOPVA037
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THPVA013	Benchmarking of the ESS LEBT in TraceWin and IBSimu	4445
	Ø. Midttun University of Bergen, Bergen, Norway Y.I. Levinsen, R. Miyamoto, D.C. Plostinar ESS, Lund, Sweden
	The modeling of the proton beam in the ESS accelerator starts with a beam distribution as an input to the TraceWin code currently used as the simulation tool. This input is typically a Gaussian distribution, a distribution from other codes, or data from an emittance measurement. The starting point of these simulations is therefore located somewhere along the low energy beam transport (LEBT) close to the ion source. In this paper, we propose to use IBSimu to model the beam extraction from the ion source, which provides an input beam distribution to TraceWin. IBSimu is a computer simulation package for ion optics, plasma extraction, and space charge dominated ion beam transport. We also present a benchmarking of the beam tracking through the LEBT using both these tools, and propose a transition interface to handover the beam distribution from IBSimu to TraceWin.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2017-THPVA013
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Paper

Title

Page

ESS Emittance Measurements at INFN CATANIA

123

O. Tuske, P. Daniel-Thomas, J.F. Denis, Y. Gauthier, T.J. Joannem, N. Misiara, V. Nadot, G. Perreu, F. Senée, V. Silva
CEA/IRFU, Gif-sur-Yvette, France
L. Celona, L. Neri
INFN/LNS, Catania, Italy
B. Cheymol, T.J. Shea
ESS, Lund, Sweden
I. Chu, M. Monteremand
CEA LITEN, CEA Grenoble, Grenoble, France
Ø. Midttun
University of Bergen, Bergen, Norway
T.V. Vacher
CEA/DSM/IRFU, France

Beam characteristics at low energy are an absolute necessity for an acceptable injection in the next stage of a linear accelerator, and are also necessary to reduce beam loss and radiation inside the machine. CEA is taking part of ESS linac construction, by designing Emittance Measurement Units (EMU) for the Low Energy Beam Transport (LEBT). The EMU are designed to qualify the proton beam produced by the INFN Catania ion source. This measurement has been decided to be time resolved, allowing to follow the beam emittance reduction, during the pulse length. A 1Mhz acquisition board controlled by EPICS save raw datas to an archiver in order to be able to post process the measurements for time resolution. The design corresponds to an Allison's scanner, using entrance and exit slits, electrostatic plates and a faraday cup. The beamstopper protects the device and can be removable to fit to beam power. It has been manufactured by the CEA/LITEN with copper tungsten HIP technique. This article report the first measurements on the ESS injector at INFN CATANIA.

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2017-MOPAB023

Export •

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

MOPVA037

Development and Commissioning of the Doppler-Shift Unit for the Measurement of the Ion Species Fractions and Beam Energy of the ESS Proton Source

936

C.A. Thomas, T.J. Shea
ESS, Lund, Sweden
J. Fils
GSI, Darmstadt, Germany
Y. Lussignol, P. Mattei
CEA/DSM/IRFU, France
Ø. Midttun
University of Bergen, Bergen, Norway
L. Neri
INFN/LNS, Catania, Italy
F. Senée, O. Tuske
CEA/IRFU, Gif-sur-Yvette, France

ESS proton source is in going to be soon delivered to the ESS project. In order to qualify the source, a series of beam instrumentation diagnostics have been designed and produced. In particular, a specific spectrograph dedicated to the fraction species measurement is currently commissioned. This instrument not only is capable of measuring the fraction species produced by the source, but also it can measure their energy and energy spread, the mass of the different species, and additional spectral rays coming from the gas species in presence in the vacuum chamber. We present in this paper the commissioning of this instrument, the Doppler Shift unit, dedicated to the measurement of the fraction species.

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2017-MOPVA037

Export •

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

THPVA013

Benchmarking of the ESS LEBT in TraceWin and IBSimu

4445

Ø. Midttun
University of Bergen, Bergen, Norway
Y.I. Levinsen, R. Miyamoto, D.C. Plostinar
ESS, Lund, Sweden

The modeling of the proton beam in the ESS accelerator starts with a beam distribution as an input to the TraceWin code currently used as the simulation tool. This input is typically a Gaussian distribution, a distribution from other codes, or data from an emittance measurement. The starting point of these simulations is therefore located somewhere along the low energy beam transport (LEBT) close to the ion source. In this paper, we propose to use IBSimu to model the beam extraction from the ion source, which provides an input beam distribution to TraceWin. IBSimu is a computer simulation package for ion optics, plasma extraction, and space charge dominated ion beam transport. We also present a benchmarking of the beam tracking through the LEBT using both these tools, and propose a transition interface to handover the beam distribution from IBSimu to TraceWin.

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2017-THPVA013

Export •

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