Benoît Bolzon

Institut de Recherche sur les Lois Fondamentales de l'Univers

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Nicolas Chauvin

Université Claude Bernard Lyon 1

Keitaro Kondo

National Institutes for Quantum and Radiological Science and Technology

M. Sugimoto

National Institutes for Quantum and Radiological Science and Technology

Hervé Dzitko

Fusion for Energy

Philippe Cara

National University of Distance Education

Francesco Scantamburlo

Istituto Nazionale di Fisica Nucleare, Laboratori Nazionali di Legnaro

Atsushi Kasugai

National Institutes for Quantum and Radiological Science and Technology

Alvaro Marqueta

ITER

J. Knaster

Nagoya University

E. Fagotti

Istituto Nazionale di Fisica Nucleare, Laboratori Nazionali di Legnaro

Cooperative Institutions

European Organization for Nuclear Research

369

Centre National de la Recherche Scientifique

107

Commissariat à l'Énergie Atomique et aux Énergies Alternatives

106

CEA Paris-Saclay

Institut de Recherche sur les Lois Fondamentales de l'Univers

Université Paris-Saclay

Institut National de Physique Nucléaire et de Physique des Particules

SLAC National Accelerator Laboratory

Istituto Nazionale di Fisica Nucleare

Max Planck Society

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Development of calorimetry methodology for beam current measurement of the Linear IFMIF Prototype Accelerator (LIPAc)

Fusion Engineering and Design (2017)

Koichi Nishiyama J. Knaster Y. Okumura Alvaro Marqueta Giuseppe Pruneri

Duty cycle

10.1016/j.fusengdes.2017.10.011

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Citations (1)

Preliminary ground motion measurements at LNF site for the Super B project

Benoît Bolzon L. Brunetti A. Jérémie

Source

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Citations (0)

High Beam Current Operation with Beam Diagnostics at LIPAc

Saerom Kwon Tomoya Akagi F. Benedetti Benoît Bolzon Yann Carin

10.18429/jacow-hb2023-frc1i2

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Citations (1)

HIGH CHARGE PHIN PHOTO INJECTOR AT CERN WITH FAST PHASE SWITCHING WITHIN THE BUNCH TRAIN FOR BEAM COMBINATION

M. Divall Alexandra Andersson Benoît Bolzon E. Bravin E. Chevallay

The high charge PHIN photo-injector was developed within the framework of the European CARE program to provide an alternative to the drive beam thermionic gun in the CTF3 (CLIC Test Facility) at CERN. In PHIN 1908 electron bunches are delivered with bunch spacing of 1.5 GHz and 2.33 nC charge per bunch. Furthermore the drive beam generated by CTF3 requires several fast 180 deg phase-shifts with respect to the 1.5 GHz bunch repetition frequency in order to allow the beam combination scheme developed at CTF3. A total of 8 subtrains, each 140 ns long and shifted in phase with respect to each other, have to be produced with very high phase and amplitude stability. A novel fiber modulator based phase-switching technique developed on the laser system provides this phase-shift between two consecutive pulses much faster and cleaner than the base line scheme, where a thermionic electron gun and sub-harmonic bunching are used. The paper describes the fiber-based switching system and the measurements verifying the scheme. The paper also discusses the latest 8nC charge production and cathode life-time studies on Cs2Te.

Electron gun

Bunches

Harmonic

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Transverse Emittance Measurement of a 2.5 MeV Proton Beam on LIPAc, IFMIF’s Prototype

HAL (Le Centre pour la Communication Scientifique Directe) (2019)

Jacques Marroncle P. Abbon Tomoya Akagi Luca Bellan Benoît Bolzon

IFMIF (International Fusion Materials Irradiation Fa-cility) is an accelerator-driven neutron source aiming at testing fusion reactor materials. Under the Broader Ap-proach Agreement, a 125 mA / 9 MeV CW deuteron accelerator called LIPAc (Linear IFMIF Prototype Accel-erator) is currently under installation and commissioning at Rokkasho, Japan, to validate the IFMIF accelerator. During the beam commissioning at 5 MeV which started in June 2018, the horizontal and vertical transverse emit-tance of a 2.5 MeV proton beam have been measured downstream of the RFQ for different machine configura-tions. Such measurements were done with an emittance measurement unit composed of slits defining a beamlet of 200 µm width, then of steerers and finally of a SEM grids monitor. In this paper, the process and the system are first described. The secondary electron emission of SEM-Grid wires is then estimated based on measure-ments and results are close to the usual rule of thumb. Finally, emittance measurements are presented and comparisons with beam dynamics simulations show good agreement.

Fusion power

Beam emittance

10.18429/jacow-ibic2019-tupp006

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Commissioning Status of Linear IFMIF Prototype Accelerator (LIPAc)

HAL (Le Centre pour la Communication Scientifique Directe) (2018)

Atsushi Kasugai P. Abbon Tomoya Akagi L. Antoniazzi Nicolas Bazin

10.18429/jacow-hb2018-thp1wb01

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Validation of the Linear IFMIF Prototype Accelerator (LIPAc) in Rokkasho

Fusion Engineering and Design (2020)

Keitaro Kondo Tomoya Akagi Fernando Arranz Nicolas Bazin Luca Bellan

Duty cycle

Fusion power

10.1016/j.fusengdes.2020.111503

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Citations (25)

ESS nBLM: Beam Loss Monitors based on Fast Neutron Detection

HAL (Le Centre pour la Communication Scientifique Directe) (2018)

T. Papaevangelou H. Alves Stéphan Aune J. Beltramelli Quentin Bertrand

A new type of Beam Loss Monitor (BLM) system is being developed for use in the European Spallation Source (ESS) linac, primarily aiming to cover the low energy part (proton energies between 3-100 MeV). In this region of the linac, typical BLM detectors based on charged particle detection (i.e. Ionization Cham-bers) are not appropriate because the expected particle fields will be dominated by neutrons and photons. Another issue is the photon background due to the RF cavities, which is mainly due to field emission from the electrons from the cavity walls, resulting in brems-strahlung photons. The idea for the ESS neutron sensi-tive BLM system (ESS nBLM) is to use Micromegas detectors specially designed to be sensitive to fast neutrons and insensitive to low energy photons (X and gammas). In addition, the detectors must be insensitive to thermal neutrons, because those neutrons may not be directly correlated to beam losses. The appropriate configuration of the Micromegas operating conditions will allow excellent timing, intrinsic photon back-ground suppression and individual neutron counting, extending thus the dynamic range to very low particle fluxes.

MicroMegas detector

Neutron Detection

Spallation Neutron Source

10.18429/jacow-hb2018-tha1we04

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Citations (8)

Beam diagnostics of an ECR ion source on LIPAc injector for prototype IFMIF beam accelerator

Fusion Engineering and Design (2018)

Benoît Bolzon Tomoya Akagi Pierre-Yves Beauvais Philippe Cara J. M. Carmona

Beam emittance

Beam dump

10.1016/j.fusengdes.2018.04.128

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Citations (10)

High beam current operation with beam diagnostics at LIPAc

Journal of Instrumentation (2024)

Saerom Kwon P. Abbon Tomoya Akagi F. Benedetti Benoît Bolzon

Abstract The L inear I nternational Fusion Materials Irradiation Facility P rototype Ac celerator (LIPAc) is under commissioning in Rokkasho Fusion Institute in Japan and aims to accelerate 125 mA D+ at 9 MeV in Continuous Wave mode for validating the IFMIF accelerator design. To ensure a fine characterization and tuning of the machine many beam diagnostics are installed spanning from injector to the beam dump. The beam operations in 1.0 ms pulsed D+ at 5 MeV were successfully completed with a low power beam dump in 2019. Despite the challenges posed by the pandemic, the crucial transition to a new LINAC configuration was also finalized to enable operation in 1.0 ms — CW D+ at 5 MeV with the high-power beam dump. The 1 st beam operation of the configuration was carried out in 2021. The experiences and challenges encountered during these beam campaigns are described in this paper.

10.1088/1748-0221/19/05/t05013

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