Guillaume Devanz
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View article: Instrumentation for High Performance Cavities and Cryomodule Field Emission Analysis
Instrumentation for High Performance Cavities and Cryomodule Field Emission Analysis Open
Field emission (FE) is one of the main reasons for the degradation of accelerator cryomodules, as field emitted current tends to become more severe during the beam operation. It is essential to better understand how this phenomenon is gene…
View article: Performance Analysis from ESS Cryomodule Testing at CEA
Performance Analysis from ESS Cryomodule Testing at CEA Open
CEA Saclay is in charge of the production of 30 elliptical cavities cryomodule as part of the in Kind contribution to the ESS superconducting. The two medium and high beta prototypes and the three first of each type of the series cryomodul…
View article: Design, Fabrication, and Test of a 175 MHz, β = 0.18, Half Wave Resonator for the IFMIF-DONES SRF-Linac
Design, Fabrication, and Test of a 175 MHz, β = 0.18, Half Wave Resonator for the IFMIF-DONES SRF-Linac Open
The IFMIF-DONES facility will serve as a fusion-like neutron source for the assessment of materials damage in future fusion reactors. The neutron flux will be generated by the interaction between the lithium curtain and the deuteron beam f…
View article: Time Resolved Field Emission Detection During ESS Cryomodule Tests
Time Resolved Field Emission Detection During ESS Cryomodule Tests Open
At CEA-Saclay we are currently testing the European Spallation Source (ESS) high beta cryomodules (CM). Each cryomodule is equipped with four superconducting elliptical cavities with their ancillaries (fundamental power couplers (FPC), fre…
View article: Results of the RF Power Tests of the ESS Cryomodules Tested at CEA
Results of the RF Power Tests of the ESS Cryomodules Tested at CEA Open
Eight of the medium and high beta cryomodules deliv-ered to ESS by CEA are tested at CEA before delivery; the two medium and high beta prototypes and the three first of each type of the series. The goal of these tests is to validate the as…
View article: Field Emission Studies During ESS Cryomodule Tests at CEA Saclay
Field Emission Studies During ESS Cryomodule Tests at CEA Saclay Open
For the development of efficient superconducting cavi-ties, field emission is an important parasitic phenomena to monitor. A diagnostic system composed of Geiger-Mueller (G-M) probes, NaI(Tl) scintillators are placed in the cryomodule test…
View article: Status of the High Power Couplers for ESS Elliptical Cavities
Status of the High Power Couplers for ESS Elliptical Cavities Open
In the framework of the European Spallation Source (ESS), CEA Paris-Saclay is responsible for the delivery of 30 cryomodules (9 medium beta (β = 0.67) and 21 high beta (β = 0.86) ones). Each cryomodule contains 4 elliptical cavities equipp…
View article: The ESS Elliptical Cavity Cryomodules Production at CEA
The ESS Elliptical Cavity Cryomodules Production at CEA Open
CEA in Kind contribution to the ESS superconducting LINAC includes 30 elliptical medium and high-beta cryomodules. CEA is in charge of the production of all the components (except the cavities delivered by LASA and STFC) as well as the ass…
View article: Field Emission Studies on ESS Elliptical Prototype Cavities at CEA Saclay
Field Emission Studies on ESS Elliptical Prototype Cavities at CEA Saclay Open
CEA Saclay is in charge of the cavity prototypes that is designing, manufacturing, testing and integrating them into demonstrator cryomodules. We have manufactured 6 medium beta and 5 high beta cavities. As part of these activities we are …
View article: Analysis of the Results of the Tests of IFMIF Accelerating Units
Analysis of the Results of the Tests of IFMIF Accelerating Units Open
The prototype IFMIF-EVEDA cryomodule encloses eight superconducting 175 MHz β=0.09 Half-Wave Resonators (HWR). They are designed together with the power coupler to accelerate a high intensity deuteron beam (125 mA) from to 5 to 9 MeV. Two …
View article: Conditioning of the First Mass Production Power Couplers for the ESS Elliptical Cavities
Conditioning of the First Mass Production Power Couplers for the ESS Elliptical Cavities Open
In the framework of the European Spallation Source (ESS), CEA Paris-Saclay is in charge of the delivery of 9 medium beta (β = 0.67) and 21 high beta (β = 0.86) cryomodules. Each cryomodule is composed of 4 cavities equipped with RF (Radio …
View article: IFMIF Resonators Development and Performance
IFMIF Resonators Development and Performance Open
The prototype IFMIF cryomodule encloses eight superconducting 175 MHz beta 0.09 Half-Wave Resonators (HWR). They are designed together with the power coupler to accelerate a high intensity deuteron beam (125 mA) from to 5 to 9 MeV. One pro…
View article: Preliminary Design of the IFMIF-DONES Superconducting Linac
Preliminary Design of the IFMIF-DONES Superconducting Linac Open
The linear accelerator for the DONES facility (DEMO oriented neutron source) will serve as a neutron source for the assessment of materials damage in future fusion reactors. The DONES accelerator, which is based on the design of LIPac (Lin…
View article: Tests at High RF Power of the ESS Medium Beta Cryomodule Demonstrator
Tests at High RF Power of the ESS Medium Beta Cryomodule Demonstrator Open
CEA is in charge of the 30 elliptical medium and high-beta cryomodules to be installed in the ESS tunnel in Lund, Sweden. Before launching the assembly of the series cryomodules, CEA developed a medium-beta cryomodule technology demonstrat…
View article: Validation of the Series Power Couplers of the LIPAc SRF Linac
Validation of the Series Power Couplers of the LIPAc SRF Linac Open
In the framework of the IFMIF/EVEDA project, the cryomodule of the Linear IFMIF Prototype Accelerator (LIPAc) will be assembled then tested at Rokkasho in 2019. Eight Series Power Couplers (PC) operating at 175 MHz were manufactured under …
View article: Status of the IFMIF/EVEDA Superconducting Linac
Status of the IFMIF/EVEDA Superconducting Linac Open
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. A prototype of …
View article: ESS Prototype Cavities Developed at CEA Saclay
ESS Prototype Cavities Developed at CEA Saclay Open
The ESS elliptical superconducting Linac consists of two types of 704.42 MHz cavities, medium and high beta, to accelerate the beam from 216 MeV up to the final energy at 2 GeV. The medium and high-beta parts of the Linac are composed of 3…
View article: First High Power Test of the ESS High Beta Elliptical Cavity
First High Power Test of the ESS High Beta Elliptical Cavity Open
ESS, the European Spallation Source, will adopt elliptical multi-cell superconducting cavities with a beta value of 0.86 to accelerate the proton beam up to 2 GeV at the last section of the linac. A 5-cell high-beta cavity for ESS project …
View article: Preliminary Test Results of the First ESS Elliptical Cryomodule Demonstrator
Preliminary Test Results of the First ESS Elliptical Cryomodule Demonstrator Open
Two ESS elliptical cavities cryomodule prototypes are being developed and will be tested at CEA Saclay before starting the series production. This paper presents the preliminary test results of the first medium beta cavities cryomodule dem…
View article: First Results of the IFMIF/EVEDA-SaTHoRI Tests
First Results of the IFMIF/EVEDA-SaTHoRI Tests Open
The SaTHoRI test stand (Satellite de Tests Horizontal des Résonateurs IFMIF) aims to characterize a jacketed and fully dressed cavity with its coupler and tuner. A dedicated test cryostat has been manufactured and is connected to an existi…
View article: Investigation of BCP Parameters for Mastery of SRF Cavity Treatment
Investigation of BCP Parameters for Mastery of SRF Cavity Treatment Open
Mastery of Standard Buffered Chemical Polishing (with mixture of hydrofluoric, nitric and phosphoric acids) is of paramount importance for the treatment of SRF resonators with complex geometry has IFMIF half-wave resonators, in order to co…
View article: Developments and Progress with ESS Elliptical Cryomodules at CEA-Saclay and IPN-orsay
Developments and Progress with ESS Elliptical Cryomodules at CEA-Saclay and IPN-orsay Open
CEA Saclay in collaboration with IPN Orsay is in charge of the ESS elliptical cavities cryomodule design, prototyping and series production. Two cryomodule prototypes are being developed and will be tested at CEA Saclay before starting the…
View article: Status of the IFMIF LIPAc SRF Linac
Status of the IFMIF LIPAc SRF Linac Open
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. A prototype of …
View article: The Superconducting Radio-Frequency Linear Accelerator Components for the European Spallation Source: First Test Results
The Superconducting Radio-Frequency Linear Accelerator Components for the European Spallation Source: First Test Results Open
The European Spallation Source requires a pulsed Linac with an average beam power on the target of 5MW which is about five times higher than the most powerful spallation source in operation today. Over 97% of the acceleration occurs in sup…
View article: ESS SRF Linear Accelerator Components Preliminary Results and Integration
ESS SRF Linear Accelerator Components Preliminary Results and Integration Open
The European Spallation Source (ESS) is a pan-European project and one of world's largest research infrastructures based on neutron sources. This collaborative project is funded by a collaboration of 17 European countries and is under cons…
View article: Manufacturing Status of the IFMIF LIPAc SRF Linac
Manufacturing Status of the IFMIF LIPAc SRF Linac Open
This paper gives the fabrication status of the IFMIF cryomodule. This cryomodule will be part of the Linear IFMIF Prototype Accelerator (LIPAc) whose construction is ongoing at Rokkasho, Japan. It is a full scale of one of the IFMIF accele…
View article: Vertical Test Results on ESS Medium Beta Elliptical Cavity Prototype
Vertical Test Results on ESS Medium Beta Elliptical Cavity Prototype Open
The ESS elliptical superconducting Linac consists of two types of 704.42 MHz cavities, medium and high beta, to accelerate the beam from 216 MeV (spoke cavity Linac) up to the final energy at 2 GeV. The last Linac optimization, called Opti…
View article: Status of the ESS Elliptical Cryomodules at CEA Saclay
Status of the ESS Elliptical Cryomodules at CEA Saclay Open
The first ESS prototype cryomodule with medium beta cavities named M-ECCTD is being assembled at CEA Saclay. The Q curves of the 4 cavities mounted inside the cryomodule are presented, and the four power couplers have been conditioned at h…
View article: Manufacturing and Validation Tests of IFMIF Low-Beta HWRs
Manufacturing and Validation Tests of IFMIF Low-Beta HWRs Open
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. A prototype of …
View article: Vertical Test Results on ESS Medium and High Beta Elliptical Cavity Prototypes Equipped with Helium Tank
Vertical Test Results on ESS Medium and High Beta Elliptical Cavity Prototypes Equipped with Helium Tank Open
The ESS elliptical superconducting Linac consists of two types of 704.42 MHz cavities, medium and high beta, to accelerate the beam from 216 MeV (spoke cavity Linac) up to the final energy at 2 GeV. The last Linac optimization, called Opti…