SRF2015 - List of Authors (Piquet, O.)

Paper	Title	Page
TUPB007	Progress in the Elliptical Cavities and Cryomodule Demonstrators for the ESS LINAC	544
	F. Peauger, C. Arcambal, S. Berry, N. Berton, P. Bosland, E. Cenni, J.-P. Charrier, G. Devanz, F. Éozénou, F. Gougnaud, A. Hamdi, X. Hanus, P. Hardy, V.M. Hennion, T. Joannem, F. Leseigneur, D. Loiseau, C. Madec, L. Maurice, O. Piquet, J. Plouin, J.P. Poupeau, B. Renard, D. Roudier, P. Sahuquet, C. Servouin CEA/DSM/IRFU, France C. Darve, N. Elias ESS, Lund, Sweden G. Olivier IPN, Orsay, France
	The European Spallation Source (ESS) accelerator is a large superconducting linac under construction in Lund, Sweden. A collaboration between CEA Saclay, IPN Orsay and ESS-AB is established to design the elliptical cavities cryomodule of the linac. It is foreseen to build and test two cryomodule demonstrators within the next two years. We present the design evolution and the fabrication status of the cryomodule components housing four cavities. The latest test results of two prototype cavities are shown. The cryomodule assembly process and the on-going testing infrastructures at CEA Saclay are also described.
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THPB045	Progress in IFMIF Half Wave Resonators Manufacturing and Test Preparation	1191
	G. Devanz, N. Bazin, G. Disset, P. Hardy, O. Piquet, J. Plouin CEA/DSM/IRFU, France H. Dzitko, H. Jenhani, J. Neyret, N. Sellami CEA/IRFU, Gif-sur-Yvette, France
	The IFMIF accelerator aims to provide an accelerator-based D-Li neutron source to produce high intensity high energy neutron flux to test samples as possible candidate materials to a full lifetime of fusion energy reactors. The first phase of the project aims at validating the technical options for the construction of an accelerator prototype, called LIPAc (Linear IFMIF Prototype Accelerator). A cryomodule hosting 8 Half Wave Resonators (HWR) at 175 MHz will provide the acceleration from 5 to 9 MeV. We report on the progress of the HWR manufacturing. A pre-series cavity will be used to assess and optimize the tuning procedure of the HWR, as well as the processing steps and related tooling. A new horizontal test cryostat (SATHORI) is also being set up at Saclay in the existing SRF test area. The SATHORI is dedicated to the IFMIF HWR performance check, fully equipped with its power coupler and cold tuning system. A 30kW-RF power will be available for these tests.
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THPB078	Status of the Power Couplers for the ESS Elliptical Cavity Prototypes	1309
	C. Arcambal CEA/IRFU, Gif-sur-Yvette, France P. Bosland, M. Desmons, G. Devanz, G. Ferrand, A. Hamdi, P. Hardy, H. Jenhani, F. Leseigneur, C. Marchand, F. Peauger, O. Piquet, D. Roudier, C. Servouin CEA/DSM/IRFU, France C. Darve ESS, Lund, Sweden
	In the frame of the European Spallation Source (ESS) project, a linear accelerator composed of a superconducting section is being developed. This accelerator owns two kinds of cavities called “medium beta cavity” (β=0.67) and “high beta cavity” (β= 0.86). These cavities are equipped with RF power couplers whose main characteristics are: fundamental frequency: 704.42MHz, peak RF power: 1.1MW, repetition rate: 14Hz, RF pulse width>3.1ms. These couplers are common to the two cavities. The CEA Saclay is responsible for the design, the manufacture, the preparation and the conditioning of the couplers used for the Elliptical Cavities Cryomodule Technological Demonstrators (ECCTD). This work is performed in collaboration with ESS and the IPNO. This paper describes the coupler architecture, its different components, the main characteristics and the specific features of its elements (RF performance, dissipated power, cooling, coupler box test for the conditioning). The status of the manufacture of each coupler part is also presented.
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FRBA01	Technical and Logistical Challenges for IFMIF-LIPAC Cryomodule Construction	1453
	H. Dzitko, N. Bazin, A. Bruniquel, P. Charon, S. Chel, G. Devanz, G. Disset, P. Gastinel, P. Hardy, J. Neyret, J. Relland, B. Renard, N. Sellami, M.R. Vallcorba-Carbonell CEA/IRFU, Gif-sur-Yvette, France N. Berton, P. Contrepois, V.M. Hennion, H. Jenhani, O. Piquet CEA/DSM/IRFU, France D. Gex, G. Phillips F4E, Germany A. Kasughai Japan Atomic Energy Agency (JAEA), International Fusion Energy Research Center (IFERC), Rokkasho, Kamikita, Aomori, Japan J. Knaster IFMIF/EVEDA, Rokkasho, Japan D. Regidor, F. Toral CIEMAT, Madrid, Spain
	This paper provides an overview of the final design and fabrication status of the IFMIF cryomodule, including the design issues, and deals with the strategies implemented in order to mitigate the main technical and logistical risks identified. The seismic constraints as well as licensing requirements, transportation issue and assembly process are also addressed. The IFMIF cryomodule presented here will be part of the LIPAc project (Linear IFMIF Prototype Accelerator). It is a full scale prototype of one of the IFMIF accelerators, from the injector to the first cryomodule, aiming at validating the technical options for the future accelerator-based D-Li neutron source to produce high intensity high energy neutron flux for testing of candidate materials for use in fusion energy reactors. The cryomodule contains all the equipment to transport and accelerate a 125 mA deuteron beam from an input energy of 5 MeV up to 9 MeV. It consists of a horizontal cryostat of about 6 m long, 3 m high and 2 m wide, which includes 8 superconducting HWRs for beam acceleration working at 175 MHz and at 4.5 K, 8 power couplers to provide RF power to cavities, and 8 Solenoid Packages as focusing elements.
	Slides FRBA01 [9.263 MB]
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TUPB100	CEA Experience and Effort to Limit Magnetic Flux Trapping in Superconducting Cavities	847
	J. Plouin, F. Leseigneur CEA/DSM/IRFU, France N. Bazin, P. Charon, G. Devanz, H. Dzitko, P. Hardy, J. Neyret, O. Piquet CEA/IRFU, Gif-sur-Yvette, France
	Protecting superconducting cavities from the surrounding static magnetic field is considered as a key point to reach very good cavity performances. This can be achieved by both limiting the causes of magnetic flux around the cavity in the cryomodule, and enclosing cavities and/or cryomodules into magnetic shields. We will present the effort made at CEA into this direction: shield design, shield material characterization, at room and cryogenic temperature, and search and attenuation of the magnetic background present in the cryomodule during the cavities superconducting transition. This last point will be especially studied for the IFMIF project where the cryomodule houses the focusing magnets. Aspects of the cold magnetic shields for ESS will also be discussed.
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WEBA04	Performances of Spiral2 Low and High Beta Cryomodules	967
	C. Marchand, P. Bosland, G. Devanz, O. Piquet CEA/IRFU, Gif-sur-Yvette, France P.-E. Bernaudin, R. Ferdinand GANIL, Caen, France Y. Gómez Martínez LPSC, Grenoble Cedex, France D. Longuevergne, G. Olry IPN, Orsay, France
	All SPIRAL2 cryomodules (twelve with one quarter wave resonator (QWR) at β=0.07 and seven with two QWRs at β=0.12) have been produced and qualified, and are now in installation phase on the LINAC at GANIL. After a general introduction on the LINAC, we will first remember and compare the different design choices taken for the two families of cryomodules. We will then present a summary of the techniques used for the preparation and integration of the cavities in the cryomodules, and compare the achieved performances with design parameters. At last, we describe the status of the LINAC installation as of end of August 2015.
	Slides WEBA04 [4.577 MB]
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Paper

Title

Page

Progress in the Elliptical Cavities and Cryomodule Demonstrators for the ESS LINAC

544

F. Peauger, C. Arcambal, S. Berry, N. Berton, P. Bosland, E. Cenni, J.-P. Charrier, G. Devanz, F. Éozénou, F. Gougnaud, A. Hamdi, X. Hanus, P. Hardy, V.M. Hennion, T. Joannem, F. Leseigneur, D. Loiseau, C. Madec, L. Maurice, O. Piquet, J. Plouin, J.P. Poupeau, B. Renard, D. Roudier, P. Sahuquet, C. Servouin
CEA/DSM/IRFU, France
C. Darve, N. Elias
ESS, Lund, Sweden
G. Olivier
IPN, Orsay, France

The European Spallation Source (ESS) accelerator is a large superconducting linac under construction in Lund, Sweden. A collaboration between CEA Saclay, IPN Orsay and ESS-AB is established to design the elliptical cavities cryomodule of the linac. It is foreseen to build and test two cryomodule demonstrators within the next two years. We present the design evolution and the fabrication status of the cryomodule components housing four cavities. The latest test results of two prototype cavities are shown. The cryomodule assembly process and the on-going testing infrastructures at CEA Saclay are also described.

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reference for this paper to ※ BibTeX, ※ LaTeX, ※ Text, ※ RIS/RefMan, ※ EndNote (xml)

THPB045

Progress in IFMIF Half Wave Resonators Manufacturing and Test Preparation

1191

G. Devanz, N. Bazin, G. Disset, P. Hardy, O. Piquet, J. Plouin
CEA/DSM/IRFU, France
H. Dzitko, H. Jenhani, J. Neyret, N. Sellami
CEA/IRFU, Gif-sur-Yvette, France

The IFMIF accelerator aims to provide an accelerator-based D-Li neutron source to produce high intensity high energy neutron flux to test samples as possible candidate materials to a full lifetime of fusion energy reactors. The first phase of the project aims at validating the technical options for the construction of an accelerator prototype, called LIPAc (Linear IFMIF Prototype Accelerator). A cryomodule hosting 8 Half Wave Resonators (HWR) at 175 MHz will provide the acceleration from 5 to 9 MeV. We report on the progress of the HWR manufacturing. A pre-series cavity will be used to assess and optimize the tuning procedure of the HWR, as well as the processing steps and related tooling. A new horizontal test cryostat (SATHORI) is also being set up at Saclay in the existing SRF test area. The SATHORI is dedicated to the IFMIF HWR performance check, fully equipped with its power coupler and cold tuning system. A 30kW-RF power will be available for these tests.

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reference for this paper to ※ BibTeX, ※ LaTeX, ※ Text, ※ RIS/RefMan, ※ EndNote (xml)

THPB078

Status of the Power Couplers for the ESS Elliptical Cavity Prototypes

1309

C. Arcambal
CEA/IRFU, Gif-sur-Yvette, France
P. Bosland, M. Desmons, G. Devanz, G. Ferrand, A. Hamdi, P. Hardy, H. Jenhani, F. Leseigneur, C. Marchand, F. Peauger, O. Piquet, D. Roudier, C. Servouin
CEA/DSM/IRFU, France
C. Darve
ESS, Lund, Sweden

In the frame of the European Spallation Source (ESS) project, a linear accelerator composed of a superconducting section is being developed. This accelerator owns two kinds of cavities called “medium beta cavity” (β=0.67) and “high beta cavity” (β= 0.86). These cavities are equipped with RF power couplers whose main characteristics are: fundamental frequency: 704.42MHz, peak RF power: 1.1MW, repetition rate: 14Hz, RF pulse width>3.1ms. These couplers are common to the two cavities. The CEA Saclay is responsible for the design, the manufacture, the preparation and the conditioning of the couplers used for the Elliptical Cavities Cryomodule Technological Demonstrators (ECCTD). This work is performed in collaboration with ESS and the IPNO. This paper describes the coupler architecture, its different components, the main characteristics and the specific features of its elements (RF performance, dissipated power, cooling, coupler box test for the conditioning). The status of the manufacture of each coupler part is also presented.

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FRBA01

Technical and Logistical Challenges for IFMIF-LIPAC Cryomodule Construction

1453

H. Dzitko, N. Bazin, A. Bruniquel, P. Charon, S. Chel, G. Devanz, G. Disset, P. Gastinel, P. Hardy, J. Neyret, J. Relland, B. Renard, N. Sellami, M.R. Vallcorba-Carbonell
CEA/IRFU, Gif-sur-Yvette, France
N. Berton, P. Contrepois, V.M. Hennion, H. Jenhani, O. Piquet
CEA/DSM/IRFU, France
D. Gex, G. Phillips
F4E, Germany
A. Kasughai
Japan Atomic Energy Agency (JAEA), International Fusion Energy Research Center (IFERC), Rokkasho, Kamikita, Aomori, Japan
J. Knaster
IFMIF/EVEDA, Rokkasho, Japan
D. Regidor, F. Toral
CIEMAT, Madrid, Spain

This paper provides an overview of the final design and fabrication status of the IFMIF cryomodule, including the design issues, and deals with the strategies implemented in order to mitigate the main technical and logistical risks identified. The seismic constraints as well as licensing requirements, transportation issue and assembly process are also addressed. The IFMIF cryomodule presented here will be part of the LIPAc project (Linear IFMIF Prototype Accelerator). It is a full scale prototype of one of the IFMIF accelerators, from the injector to the first cryomodule, aiming at validating the technical options for the future accelerator-based D-Li neutron source to produce high intensity high energy neutron flux for testing of candidate materials for use in fusion energy reactors. The cryomodule contains all the equipment to transport and accelerate a 125 mA deuteron beam from an input energy of 5 MeV up to 9 MeV. It consists of a horizontal cryostat of about 6 m long, 3 m high and 2 m wide, which includes 8 superconducting HWRs for beam acceleration working at 175 MHz and at 4.5 K, 8 power couplers to provide RF power to cavities, and 8 Solenoid Packages as focusing elements.

Slides FRBA01 [9.263 MB]

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TUPB100

CEA Experience and Effort to Limit Magnetic Flux Trapping in Superconducting Cavities

847

J. Plouin, F. Leseigneur
CEA/DSM/IRFU, France
N. Bazin, P. Charon, G. Devanz, H. Dzitko, P. Hardy, J. Neyret, O. Piquet
CEA/IRFU, Gif-sur-Yvette, France

Protecting superconducting cavities from the surrounding static magnetic field is considered as a key point to reach very good cavity performances. This can be achieved by both limiting the causes of magnetic flux around the cavity in the cryomodule, and enclosing cavities and/or cryomodules into magnetic shields. We will present the effort made at CEA into this direction: shield design, shield material characterization, at room and cryogenic temperature, and search and attenuation of the magnetic background present in the cryomodule during the cavities superconducting transition. This last point will be especially studied for the IFMIF project where the cryomodule houses the focusing magnets. Aspects of the cold magnetic shields for ESS will also be discussed.

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reference for this paper to ※ BibTeX, ※ LaTeX, ※ Text, ※ RIS/RefMan, ※ EndNote (xml)

WEBA04

Performances of Spiral2 Low and High Beta Cryomodules

967

C. Marchand, P. Bosland, G. Devanz, O. Piquet
CEA/IRFU, Gif-sur-Yvette, France
P.-E. Bernaudin, R. Ferdinand
GANIL, Caen, France
Y. Gómez Martínez
LPSC, Grenoble Cedex, France
D. Longuevergne, G. Olry
IPN, Orsay, France

All SPIRAL2 cryomodules (twelve with one quarter wave resonator (QWR) at β=0.07 and seven with two QWRs at β=0.12) have been produced and qualified, and are now in installation phase on the LINAC at GANIL. After a general introduction on the LINAC, we will first remember and compare the different design choices taken for the two families of cryomodules. We will then present a summary of the techniques used for the preparation and integration of the cavities in the cryomodules, and compare the achieved performances with design parameters. At last, we describe the status of the LINAC installation as of end of August 2015.

Slides WEBA04 [4.577 MB]

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