LINAC2016 - List of Authors (Miyamoto, R.)

Paper	Title	Page
MOPRC013	Tracking Based Courant-Snyder Parameter Matching in a Linac with a Strong Space-Charge Force	93
	R. Miyamoto ESS, Lund, Sweden
	During the design of a hadron linac, matching at the interfaces of different structures or lattice periods is often performed with the linear approximation of the space-charge force. When space-charge is extremely strong, like in the low energy part of the proton linac of the European Spallation Source, such a matching method is not always good enough and could lead to a residual mismatch at the design level. To avoid this, a matching scheme based on iterations of tracking, thus including the full effect of the space-charge force, is developed. This paper presents the scheme itself as well as its application to the ESS linac.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-LINAC2016-MOPRC013
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MOPLR059	Commissioning Plans for the ESS DTL	264
	M. Comunian, L. Bellan, F. Grespan, A. Pisent INFN/LNL, Legnaro (PD), Italy M. Eshraqi, R. Miyamoto ESS, Lund, Sweden
	The Drift Tube Linac (DTL) of the European Spallation Source (ESS) is designed to operate at 352.2 MHz with a duty cycle of 4% (a beam pulse of 2.86 ms, 14 Hz repetition period) and will accelerate a proton beam of 62.5 mA pulse peak current from 3.62 to 90 MeV. This article describes the commissioning strategy plans for the DTL part of the linac, techniques for finding the RF set-point of the 5 tanks and steering approach. Typical beam parameters, as proposed for commissioning purposes, are discussed as well and how the commissioning sequence of the tanks fits together with ongoing installation works in the tunnel.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-LINAC2016-MOPLR059
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MOPLR069	Implication of Manufacturing Errors on the Layout of Stabilization System and on the Field Quality in a Drift Tube Linac - RF DTL Error Study	290
	R. De Prisco, A.R. Karlsson Lund University, Lund, Sweden M. Eshraqi, Y.I. Levinsen, R. Miyamoto ESS, Lund, Sweden
	The field flatness and the layout of the stabilization system in a drift tube linac are strongly dependent on the manufacturing errors that affect the local resonant frequency. In this paper a methodology is presented to study, firstly, the sensitivity of the resonant frequency and of the field flatness to each geometrical parameter of the drift tubes; then a set of tolerances for each parameter is found and a stabilization system layout is defined in order to keep the field flatness within an acceptable limit.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-LINAC2016-MOPLR069
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MOPLR070	Integration of Interfaces and Stabilization System in the Design of a Drift Tube Linac	294
	R. De Prisco, A.R. Karlsson Lund University, Lund, Sweden M. Eshraqi, Y.I. Levinsen, R. Miyamoto ESS, Lund, Sweden
	Making an accurate RF design of any accelerating structure is fundamental to ensure that electromagnetic and beam dynamics requirements will be achieved. This is essential for the most complicated accelerating structures like the drift tube linac: in this case a meticulous design facilitates the RF commissioning too. In this paper the influence of the interfaces and of the field stabilization system on the RF design is analyzed and an advanced design methodology to mitigate field degradation is presented.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-LINAC2016-MOPLR070
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

Paper

Title

Page

Tracking Based Courant-Snyder Parameter Matching in a Linac with a Strong Space-Charge Force

93

R. Miyamoto
ESS, Lund, Sweden

During the design of a hadron linac, matching at the interfaces of different structures or lattice periods is often performed with the linear approximation of the space-charge force. When space-charge is extremely strong, like in the low energy part of the proton linac of the European Spallation Source, such a matching method is not always good enough and could lead to a residual mismatch at the design level. To avoid this, a matching scheme based on iterations of tracking, thus including the full effect of the space-charge force, is developed. This paper presents the scheme itself as well as its application to the ESS linac.

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-LINAC2016-MOPRC013

Export •

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

MOPLR059

Commissioning Plans for the ESS DTL

264

M. Comunian, L. Bellan, F. Grespan, A. Pisent
INFN/LNL, Legnaro (PD), Italy
M. Eshraqi, R. Miyamoto
ESS, Lund, Sweden

The Drift Tube Linac (DTL) of the European Spallation Source (ESS) is designed to operate at 352.2 MHz with a duty cycle of 4% (a beam pulse of 2.86 ms, 14 Hz repetition period) and will accelerate a proton beam of 62.5 mA pulse peak current from 3.62 to 90 MeV. This article describes the commissioning strategy plans for the DTL part of the linac, techniques for finding the RF set-point of the 5 tanks and steering approach. Typical beam parameters, as proposed for commissioning purposes, are discussed as well and how the commissioning sequence of the tanks fits together with ongoing installation works in the tunnel.

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-LINAC2016-MOPLR059

Export •

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

MOPLR069

Implication of Manufacturing Errors on the Layout of Stabilization System and on the Field Quality in a Drift Tube Linac - RF DTL Error Study

290

R. De Prisco, A.R. Karlsson
Lund University, Lund, Sweden
M. Eshraqi, Y.I. Levinsen, R. Miyamoto
ESS, Lund, Sweden

The field flatness and the layout of the stabilization system in a drift tube linac are strongly dependent on the manufacturing errors that affect the local resonant frequency. In this paper a methodology is presented to study, firstly, the sensitivity of the resonant frequency and of the field flatness to each geometrical parameter of the drift tubes; then a set of tolerances for each parameter is found and a stabilization system layout is defined in order to keep the field flatness within an acceptable limit.

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-LINAC2016-MOPLR069

Export •

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

MOPLR070

Integration of Interfaces and Stabilization System in the Design of a Drift Tube Linac

294

R. De Prisco, A.R. Karlsson
Lund University, Lund, Sweden
M. Eshraqi, Y.I. Levinsen, R. Miyamoto
ESS, Lund, Sweden

Making an accurate RF design of any accelerating structure is fundamental to ensure that electromagnetic and beam dynamics requirements will be achieved. This is essential for the most complicated accelerating structures like the drift tube linac: in this case a meticulous design facilitates the RF commissioning too. In this paper the influence of the interfaces and of the field stabilization system on the RF design is analyzed and an advanced design methodology to mitigate field degradation is presented.

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-LINAC2016-MOPLR070

Export •

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