First proton beam into the RFQ

First proton beam injected into the RFQ on 13 June 2018!!!

As a major milestone towards the validation of the IFMIF accelerator design, the first beam has been injected into the RFQ at the LIPAc (Linear IFMIF Prototype Accelerator) at Rokkasho on 13 June 2018.

Phase B configuration (stage at 5 MeV with deuterons and 2.5 MeV with protons)


Injector LEBT output current~7 mA, Low Power Beam Dump current (LPBD) ~1.9 mA -> about 30% of total transmission


After some optimization, on Friday 15 June 2018 more than 80% of transmission in the RFQ was achieved.

Injector LEBT output current 7.4 mA, RFQ transmission > 80%

This first campaign consisting of the full characterization of the proton beam at low duty cycle,  followed by an increase of the beam current up to 65mA, will last almost 8 weeks, and will be followed by the deuteron beam operation. Besides this important milestone being reached, LIPAc project will have to face other important challenges before the start of the next phase with the assembly of the SRF Linac at Rokkasho site and the installation of the HEBT/BD required to reach the final targeted 9MeV.


Congratulation to the LIPAc Operation Team!!!

The international team of European and Japanese scientists and engineers celebrating this important milestone


100mA beam extracted after long maintenance shutdown

After a shutdown period of more than five months long, along which a thorough maintenance campaign on the injector took place, 90keV proton beam, with more than 100mA current, was extracted again this week, in preparation for the last injector commissioning campaign that will span over 5 weeks until November 4th.

Main beam parameters
International team toast to the success of the last injector commissioning campaign

From October 3rd until November 4th the last campaign of the accelerator commissioning will take place. This time will be used to fine tune the source before the RFQ is finally assembled attached to it by the end of November. To assure the optimal condition of the injector for this important stage, a thorough maintenance campaign has been performed along the summer, with more than 70 interventions including vacuum system, PPS and control system upgrade, recalibration of high voltage power supplies, RF equipment and the complete cleanup and reassembly of the injector column.

In parallel, during this period, installation activities have progressed steadily. In the vault, the RFQ finalized the assembly of the four super modules and completed the bead pull measurement tests satisfactorily, in preparation for the last piping and cabling works. In addition, a task force from CIEMAT has been working on MEBT (bunchers, quadrupole magnets) and D-Plate (which hosts most of the beam instrumentation) to finalize the mechanical installation, pressure and vacuum tests and signal cabling. Regarding the RF system, all eight chains for the RFQ and two for the bunchers have been installed commissioning will start soon. Currently, coaxial transmission lines are under the final stage of installation.

Accelerator vault after summer installation activities
RF coaxial waveguides installation
RF coaxial waveguides

RFQ delivery reception at Rokkasho BA site

We are proud to announce that on February 22nd 2016 the RFQ supermodules boxes were received at Rokkasho BA site. The three supermodules were delivered separately by INFN, already preassembled and aligned in INFN Legnaro (Italian National Institute of Nuclear Physics). The RFQ, a 10 m long structure composed by 18 modules flanged together will be the longest and will accelerate the highest intensity beam in the world (D+ particle from 0.1 MeV to 5 MeV at 125 mA in CW).

Supermodule package unloading in front of BA accelerator building
Transportation of one supermodule package inside the vault
Supermodules packages stored in the vault near the beam dump wall











All the supermodule packages have been stored in the vault area waiting to start installation shortly, as it has been scheduled to start from March 31st. All the IFMIF community wants to thanks all INFN personel involved in the design, fabrication, assembly and testing of such high technology subsystem.

INFN RFQ team in front of the three supermodules at INFN Legnaro before delivery to Rokkasho
INFN RFQ team in front of the three supermodules at INFN Legnaro before delivery to Rokkasho

Last week  additional components delivered from CIEMAT were also received in Rokkasho, the spanish institute on energy and environmental sciences, including the HEBT cooling skid, the third RF module (after the already installed two first modules) and some ancillary components from the MEBT.

During this first half of year 2016 most components for next LIPAc Commissioning phase B are expected to be delivered to Rokkasho and to be installed, including the whole RFQ system, MEBT, diagnostics and D-Plate, RF Power system for RFQ and Bunchers, cooling system and the associated local control systems for all the above.

First plasma and ion beam extraction

First plasma and ion beam extraction have been achieved at the Linear IFMIF Prototype Accelerator

The IFMIF/ EVEDA team of colleagues behind this very important milestone

The International Fusion Materials Irradiation Facility (IFMIF) is one of the projects stemming from the Broader Approach Agreement, a partnership in fusion energy research between Europe and Japan. IFMIF is an accelerator-based neutron source that produces, using deuterium-lithium nuclear reactions, a large neutron flux similar to that expected at the first wall of a fusion reactor.
Two important milestones have recently been achieved at the Linear IFMIF Prototype Accelerator (LIPAc): the accomplishment of the first hydrogen plasma in the ionisation chamber and the first extraction of an ion beam (H+).
In the case of LIPAC, the Japanese Atomic Energy Agency (JAEA) has been responsible for the procurement of the conventional systems, such as the accelerator building, the secondary cooling system, and the machine and personnel protection system. Europe’s contribution, coordinated by Fusion for Energy (F4E), has been delivered by the European countries voluntarily contributing to the BA. The LIPAC injector has been developed and manufactured by France’s Commissariat à l’Énergie Atomique et aux Énergies Alternatives (CEA) Saclay. It has been successfully installed in Rokkasho, Japan,  and is now under commissioning.
The achievement of the first plasma and beam extraction has been an important achievement for the LIPAc team, including participating experts from France’s CEA, led by Raphael Gobin. After the accomplishment of the widely anticipated first plasma, extensively reported in Japanese media, within only two days, further commissioning allowed a proton beam of 100 keV and 100 mA to be obtained. The prospects are now excellent to reach the target of extracting a current of 140 mA of 100 keV D+ ions in the forthcoming commissioning phase with deuterium.

Low Energy Beam Transfer installed in Rokkasho

Visit to Noheji shrine

A key milestone related with the LIPAc Installation and Commissioning activities, that are going on in Rokkasho, took place on Tuesday 14 October. The project management from JAEA, F4E and PT went together to Hachimangu Shintoist Shrine in Noheji to pray for the success of LIPAc. Each of us made an offer to the Gods asking for their divine support to our project. Our actions were blessed with wind and rain from the strong typhoon that was passing over Japan those days.

Project management from JAEA, F4E and PT at the Hachimangu Temple in Noheji
Project management from JAEA, F4E and PT at the Hachimangu Shrine in Noheji

From left to right: M. Sugimoto, K. Shoji, S. O’hira, K. Ushigusa, J. Knaster, Y. Okumura, P. Cara, R. Heidinger, A. Kasugai, K. Iizuka

ITER Director-General gets update on Broader Approach

Rokkasho, Japan, 07 August 2014 ; (courtesy of ITER newsline)

In Rokkasho, on the eastern coastline of Japan, Europe and Japan are jointly carrying out advanced R&D activities in support of ITER and for successful development of the phases after ITER. Termed the “Broader Approach,” these efforts have been underway since 2007.

In early August, the Director-General of the ITER Organization, Osamu Motojima, and ITER Council Secretary, Sachiko Ishizaka, visited Rokkasho for an update on Broader Approach activities and to share information about progress at ITER.

The activities of the Broader Approach are essential for the phases after ITER in the world fusion program. One project, IFMIF/EVEDA, is validating the concept for a fusion-relevant neutron source based on Li(d,xn) reactions and will permit the rapid construction of such a facility within cost and schedule less than a decade from the time that a decision is taken. IFERC, another BA project, not only holds a supercomputer dedicated to plasma simulations for the world fusion community (Helios), but is also implementing research efforts towards a (post-ITER) DEMO reactor. JT-60SA, being a BA project as well, is a fusion experiment designed to support the operation of ITER and to investigate how best to optimise the operation of fusion power plants that are built after ITER

After visiting the facilities, including the injector of LIPAc, the Linear IFMIF Prototype Accelerator (LIPAc) that is presently under installation and commissioning, the visitors from ITER were able to appreciate the sound advancements and robust health of the Broader Approach projects.

Photo caption: After meeting the management of the Japan Atomic Energy Agency, ITER Director-General Motojima (second from left) gave a seminar to Broader Approach staff on the evolution of ITER. Juan Knaster, Project Leader of IFMIF/EVEDA (far left) and Noriyoshi Nakajima (not pictured), Project Leader of IFERC, explained the status of their respective projects and plans for the future. Council Secretary Sachiko Ishizaka is pictured fifth from right. Kenkichi Ushigusa, Director-General of Rokkasho Fusion Institute (JAEA) is pictured third from right.


6th IFMIF Workshop hosted by Nagoya and Kyoto Universities

Nagoya & Kyoto, Japan, 20-24 January 2014PosterOriginalSmallNews

The New Year brought a very important event for the IFMIF agenda: the 6th International IFMIF Workshop, kindly hosted by the universities of Nagoya and Kyoto, from Monday 20 to Friday 24 January 2014, where the most recent advances and achieved milestones of our project were shared among the community. In particular, the recent achievement of the IFMIF IIEDR (Intermediate IFMIF Engineering Design Report) submitted on schedule on June 2013, stamping the end of the IFMIF Engineering Design Activities, was thoroughly covered during the first day. Also, the on-going activities on the different EVEDA prototyping subprojects were discussed, with special relevance to the latest advances of the LIPAc accelerator, which installation is about to start.
The time we all passed together reinforced the links and allowed lots of valuable parallel discussions to exchange ideas and to clarify points of view, which are essential for the important coming milestones that we will have to overcome in the next months. Our project is entering a decisive phase but the global enthusiasm shared these days in Nagoya and Kyoto reflect a strong will to face the difficulties ahead, and are a foretaste of the coming successes.

Link to the workshop agenda


13th Meeting of the IFMIF/EVEDA Project Committee

Rokkasho, Japan, 19-20 March 2014

On 19- 20 March, the 13th Meeting of the IFMIF/EVEDA Project Committee (IFMIF PC-13) was held at the JAEA Rokkasho site.

The meeting was mainly devoted to the review of the updated Project Plan and the Annual Report 2013 for the IFMIF/EVEDA Project, to be submitted to the next Broader Approach Steering Committee (BA SC) for approval.

The IFMIF PC welcomed the relevant results of the investigations carried out with respect to the cavitation phenomena and observed thinning of the stainless steel conduits in the EVEDA Lithium Test Loop Experiments (ELTL), and encouraged JAEA to consider additional experimental time beyond the presently agreed test campaign scheduled termination date. Additional efforts towards the long term operation under vacuum were also deemed advisable to be taken into consideration in the near future.

Good news were also reported with regards the progress of the Linear IFMIF Prototype Accelerator (LIPAc) Installation and Commissioning activities. The IFMIF PC participants had the opportunity to see the advances of the on-site activities being jointly carried out by JAEA, Project Team, and CEA experts. The installation of the Ion Source and Low Energy Beam Transport line is now progressing at full speed moving forward the LIPAcfs 1st Stage Commissioning, which is presently planned to start by summer this year.

The successful NaK filling of the High Flux Test Module (HFTM) has unblocked the related test facilities validation activities, allowing in particular to launch the preparatory work for the BR2 fission reactor irradiation campaign at SCK-CEN (Mol, Belgium).

The next IFMIF/EVEDA Project Committee meeting will be held in Rokkasho (Japan) on 8-9 October 2014.