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.
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.
On Thursday 21 April, a celebration took place as major accelerator components had been transported by F4E to the Rokkasho Fusion Centre allowing the start of second phase in the commissioning of LIPAc. This is another major milestone on road of success for the IFMIF/EVEDA Project. Already in 2013, the engineering design activities were successfully accomplished on schedule. By 2015, the Target and Test facility validation activities were fully completed, with the exception of the on-going corrosion/erosion tests in the lithium loop constructed in Brasimone by ENEA. This facility is now providing important results to quantify the corrosion/erosion rates of fusion reactor steel grades in contact with a high speed flow of liquid lithium.
The LIPAc is under installation and commissioning in Rokkasho. Its key systems are designed and manufactured mainly by CEA, CIEMAT and INFN integrating also some important components contributed by SCK-CEN (see Figure above for a breakdown of the contributions). The LIPAc is designated to operate in unprecedented beam conditions at the cutting edge of present days’ accelerators technologies. During the previous meeting of Broader Approach Steering Committee (BASC-17), hosted on 11 December 2015 by RFX, an extension of the LIPAc validation period until December 2019 was approved. The deuteron source (Injector) developed by CEA has demonstrated that the beam characteristics are achievable in a parameter field never reached before (100 kA and 140 mA deuteron beam). An operational point with protons to be used as beam input to the ensuing accelerator stage, the Radio Frequency Quadrupole (RFQ) developed by INFN, has been determined. Additional commissioning of the Injector towards the mandated operation mode in Continuous Wave, i.e. 100% duty cycle of the beam, will take place during 2016 interleaved with the preparation activities for beam commissioning with the RFQ. The RFQ now under installation at Rokkasho is the longest one ever constructed. Today 6 out of 8 RF power chains developed by CIEMAT are already installed, which are to deliver 200 kW each to operate the RFQ. The last two chains are to arrive before the summer.
The celebration of the success of the Injector commissioning and the start of installation of the RFQ and the RF power generator for the Linear IFMIF Prototype Accelerator enjoyed utmost interest among European and Japanese partners. The celebration received the participation of representation from the European Delegation in Japan and the Embassies of all the six European countries that have been involved in the IFMIF/EVEDA project. Among the European guests were the Ambassador of Spain to Japan, Gonzalo de Benito; the Director of Nuclear Energy, Safety and ITER of the DG Energy in the European Commission, Massimo Garribba; the Chairman of the Governing Board of F4E, Joaquin Sanchez; the Chairman of CEA, Daniel Verwaerde, the member of the Executive Board of INFN, Eugenio Nappi; the Directors of INFN Legnaro, Giovanni Fiorentini, and of INFN Torino, Amedeo Staiano; Angel Ibarra from CIEMAT. Among the Japanese guests were the Governor of Aomori Prefecture, Shingo Mimura; the President of QST, Toshio Hirano; the President of JAEA (to which the Japanese Fusion programme belong to until 31 March 2016), Toshio Kodama; the Deputy Director General of Research and Development Bureau at MEXT; Shuichiro Itakura.
The 9th LIPAc Technical Meeting (LTM09) was held at the IFERC Site in Rokkasho, Japan, from 19th to 22nd April 2016. More than 40 experts from different involved institutes, including CEA (Saclay, France), INFN (Legnaro, Italy), QST (Rokkasho, Japan), CIEMAT (Madrid, Spain), F4E (Garching, Germany) and the IFMIF/EVEDA Project Team; attended the meeting. In addition, Japanese experts from KEK and J-PARC attended on behalf of QST.
Many satellite meetings were held, with devoted discussions on most of the accelerator systems, including the MEBT (Medium Energy Beam Transport), HEBT (High Energy Beam Transport) and the Beam Dump; the control systems, including vacuum system integration and its overall process management, the control room configuration; the different phases of LIPAc commissioning, including integrated operation scenarios and beam dynamics issues; and the cryomodule assembly.
During the LTM, much detailed technical information was presented, highlighting the significant progress that has been made for the manufacture and installation of various components since the previous LTM08 held in Garching (Germany) on 24-26 November 2015.
The main outcomes presented during the meeting are listed below:
Over the last 6 months injector operations have been very intense: 3 measurements campaigns were carried out as well as curative and major preventive maintenance. The deuteron beam commissioning performed in December 2015 gave promising results, the emittance met specifications at 20 % and 50 % duty cycle for currents of 110 mA at the level of the beam stop. In March 2016, the measurement campaign with a proton beam, which is a scaled version by a factor of 0.5 in intensity and energy, but with the same perveance as a deuteron beam, enabled to find a good working point at 10 % duty cycle. The last measurement campaign was very effective thanks to the careful maintenance performed and to Tracewin simulations which made it possible to determine the most interesting sets of machine parameters giving the best beam characteristic
- RF power systems
Remarkable progress was made for the RF system, with the delivery and installation inside RF power supply area of the Accelerator Building of all of the HVPSs and the first three RF Modules for the RFQ. The main cable trays, panel boards and grounding systems have also been installed, and the transformers and the HV breakers on the electrical platform are complete.
The four RF modules for the SRF LINAc have been manufactured, and the first unit has been partially tested and will soon be ready for shipment. It will be shipped to CEA Saclay for integration on the Sathori Test Stand.
The RFQ super module installation was successfully completed according to the schedule presented at LTM08 (Garching, Germany). The bead pull measurements will commence on 25/04/16 and will be completed by the end of July after 3 campaigns of measurement. The RFQ will then be relocated to its final position immediately afterwards.
The RFQ cooling skid and accessories are at Rokkasho and the water cooling skid requires some adjustment before its final installation/site commissioning.
The MEBT arrived in Rokkasho in March 2016, and was temporarily positioned inside the Accelerator Vault by the end of March. The electrical cubicles and other electrical equipment are expected to arrive in the middle of July, while the cooling skid, piping and associated accessories are currently being manufactured
The D-plate was installed inside the Accelerator Vault in a temporary position, in April 2016.
- SRF Linac
While licensing activities for the complete cryomodule continue, the formal approval of the cavity design by KHK was obtained representing a great success for those involved.
Manufacturing contracts for all critical components have now been placed, and the tender process for a number of non-critical-path items has also been launched. Agreement has nearly been reached on the definition of the requirements for the clean room to be constructed at Rokkasho, and the tendering process for the clean room’s construction is expected to start by June.
The main cryogenic system components, including He compressors, oil removal system and cold box, have been manufactured and delivered to Rokkasho.
The requirements for the licensing of the cryoplant have been clarified. The cryoplant distribution piping and equipment are currently being designed.
- HEBT/Beam Dump
The HEBT water cooling skid, which will cool the magnet of the MEBT and HEBT, arrived in Rokkasho in January 2016. It was positioned inside the Accelerator HEX room and the piping is expected to start after the final positioning of the MEBT, which will intervene after the final positioning and back out of the RFQ.
A number of manufacturing contracts for the HEBT are ongoing, including the construction of the quadrupole and dipole. The design of the beam chambers is complete and the technical specifications have been prepared. The remaining components, i.e., power supply, supports, magnets coil system, vacuum pumps and associated equipment; have also been designed and are being procured.
Design for manufacture continues for both the Beam Dump low alloy steel shielding and mobile shielding, with manufacturing expected to start for both at the end of May 2016. Final assembly and acceptance tests are expected to commence in September. Manufacturing is progressing well for the Beam Dump cartridge.
- Control system
The dedicated Control Systems and LIPAc Operation satellite meeting was fruitful. It was identified that the integration of the different LCS into the CCS is on the critical path and mitigation actions should be considered. It was agreed also the need to tackle the various operational issues e.g. setup of the vacuum systems, identifying the thresholds for the MPS and setup of common operating procedures. An operating procedure for phase B, including a start-up procedure needs to be prepared urgently and missing operations with possible proposed configurations must be identified.
The meeting was successful in spite the overlapping of Broader Approach Steering Committee half-yearly meeting (BASC) and LIPAc ceremony. The main actors who have done all the technical work could also attend LIPAc ceremony and finally to the pleasant banquet that took place in the Kizan restaurant in Misawa, together with all ceremony participants for the celebration of success of the Injector commissioning and the start of installation of the RFQ and RF power generation for the LIPAc.
See you at the next LTM10 at the end of November 2016, again in Rokkasho (Japan)
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).
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.
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.
See the news here
The 7th LIPAc Technical Meeting (LTM07) was held at Rokkasho, BA site Fusion Research Center (Japan) from 15th to 17th June 2015, and on the following two days Satellite meetings with more detailed technical discussions were held.
More than 40 experts from CEA (Saclay, France), INFN (Legnaro, Italy), JAEA (Rokkasho, Japan), CIEMAT (Madrid, Spain), F4E (Garching, Germany)and the IFMIF/EVEDA Project Team attended the meeting with additional European experts contributing remotely by videoconference.
The technical information that was presented at the meeting highlighted the significant progress achieved for the various components since the last LTM06 in November 2014.
A particular highlight was the positive results that are presently obtained from the Injector commissioning as shown by the operation leader, Yoshikazu Okumura.
The main outcomes presented during this meeting are listed below:
The Injector commissioning resumed on April 22nd with the objective to complete the phase A1.2 (H+ beam, energy 50keV,variation d.c.,UIE,Itot) including the characterization and optimization of the proton beam. Performances of 100kV/155mA @ 20% duty cycle were reached during this campaign, allowing optimization of the beam emittance. Continuous wave (CW) operation was also tested successfully at 120 mA/100 kVeV, with 650 W RF power and SCCM gas flow rate.
The next important step is expected in July with the proposed start of deuterium operation (phase A1.3) after the Facility inspection by Radiation Authority.
RF power systems
Installation of transformers and the HV breakers on the electrical platform has started with JAEA contractor NKK. The contract for the remaining cable trays will be launched soon.
The delivery of the HVPS and RF power system for the RFQ is expected by the end of July 2015 at Rokkasho and its installation will take place upon its arrival.
- The RFQ super modules are nearing completion at INFN Legnaro (Italy) and will be shipped in December 2015 after the final acceptance test at Legnaro in November 2015. Cooling skid, piping and accessories will be shipped by the end of September 2015. The remaining components will be shipped to Rokkasho by February 2016.
- MEBT: much work has been completed in the last months to finish the manufacturing and the tests of the main components and auxiliaries. CIEMAT continue to push to have the beamline integrated for test by the end of this summer, with the aim to have the MEBT delivered to Rokkasho at the beginning of 2016.
- The LPBD detailed design is on going, was showed in the presentation its readiness for construction. Details for its cooling system were also discussed during the LTM.
- The SRF Linac design is completed and manufacturing contracts for the critical components have been placed. The licensing activities are on-going.
- The D-Plate is almost completed and will be ready for shipment by November 2014. Some activities of alignment of the components need to be confirmed by ensuring the reproducibility of the ideal accuracy expected.
- The HEBT and Beam Dump main components designs partially completed as already discussed in the previous LTM06 held last November 2015. Technical specifications are nearing completion and several manufacturing contracts have been launched
- Writing of the beam dump cooling system specification will start soon
- PPS-MPS,are now operational for injector commissioning. However, some modifications will be necessary for the next phase, especially with respect to the integration into the CCS, which is considered as an important milestone;
A site visit of the Accelerator Prototype Building was held, giving all attendees the opportunity to visit the vault and the RF area.
A pleasant event on the second day of the meetings was organized in a typical Japanese Restaurant in Rokkasho called “Darumaya”.
See you next LTM08 in Garching!
LTM08 will be held on Tuesday 24th, Wednesday 25th and Thursday 26th of November 2015.
Prof. G.Rostagni, former RFX president and historical member of BA SC (Broader Approach Steering Committee) and Dr. G. Piovan, RFX director, visited Rokkasho on 23rd October 2015. Prof. G. Rostagni is our most senior supporter, following various attempts to visit Rokkasho, it has been possible his visit after almost 7 years from the last time at Rokkasho
The agenda of the meeting was eventful, started with the greeting visit to the deputy mayor of Rokkasho Susumu Hashimoto-san accompanied by G. Pruneri, K. Sakamoto and K.Hirata respectively; Section leader ILIC Unit, deputy IFMIF/EVEDA Project Manager and JAEA site Public Affair Manager.
To follow, chronologically, were visited: Japan Nuclear Fuel Limited Facility (JNFL), Wind Power Generation System and Solar Power Generation System, all facilities are located within Rokkasho area. Lunch took place at Rokka Pokka, the famous SPA in Rokkasho.
In the afternoon were made some presentations by K. Tobita (IFERC Director) on IFERC status and future plan, G. Pruneri and K. Okiai, respectively on IFMIF/EVEDA status and the introduction of activities foreseen by JAEA, for a post BA project (A-FNS)
Afterwards took place a visit to the LINAc Accelerator, Computer Center and Demo R&D Center, with a comprehensive detailed explanation of the facilities, respectively given by K. Sakamoto-G.Pruneri, Y. Ishii-K.Tobita and H. Tanigawa – S. Nakamichi
Finally the visit ended at Misawa, to the Takara-sushi restaurant for a dinner, with a very delicious food and with a pleasant attendance of BA activities’ management: S. Ohira, K. Sakamoto, K.Tobita, K. Okumura, K. Ochiai, G. Pruneri and F. Scantamburlo.
16th meeting of the Broader Approach Steering Committee
Naka (Japan), 21 April 2015
The Broader Approach Agreement between the EU and Japan supports the ITER project and the realization of fusion as a clean and sustainable source of energy for peaceful purposes.
The Broader Approach Agreement encompasses three research projects:
- “IFMIF/EVEDA”, to prepare for the construction of a materials test facility for future fusion reactors;
- The International Fusion Energy Research Centre (IFERC);
- The Satellite Tokamak Programme JT-60SA, a major upgrade of the tokamak JT-60
The working site for IFMIF/EVEDA and IFERC is Rokkasho (Japan), the site of the Satellite Tokamak Programme is Naka (Japan).
The Broader Approach is now in its eighth year and has become a model for effective international scientific collaboration, strengthening cooperation between the EU and Japan in delivering fusion as an energy source for the future.
Today (21 April 2015) representatives of the EU and Japan met at Naka Fusion Institute (Naka, Japan) for the 16th meeting of the Broader Approach Steering Committee and approved the 2014 Annual Reports and updates of the Project Plans for the three projects.
The initial beam test of the injector of the Linear IFMIF Prototype Accelerator in Rokkasho began producing scientific results in November 2014. The EVEDA Lithium Test Loop in Oarai has successfully demonstrated stable lithium flow for IFMIF operating conditions and has now completed its mission. The Test Facility Validation activities have been successfully accomplished.
The Helios supercomputing system (Roku-chan) has been in routine use since 2012 by researchers from the EU and JA resulting in many high-quality scientific papers. The Intermediate Report on DEMO Design has been complied focusing on a technical perspective of DEMO on the basis of evaluation and assessment of critical design issues. The DEMO R&D project has studied the compatibility of SiC and SiCf/SiC composites with liquid Pb-Li alloy. The results have been added to the database for the study of the liquid blanket.
The main components manufactured in Europe – the Quench Protection Circuit, the High Temperature Superconducting Current Leads and the Cryoplant for the superconducting magnet, have now been delivered and are being installed. Nine of the ten Vacuum Vessel sections are already sitting on the base and the welding of the sections is progressing well.
These remarkable achievements were celebrated by a ceremony on 20th April attended by dignitaries from Japan and the EU which included representatives of the European Commission, France, Germany, Italy and Spain.
The Steering Committee expressed appreciation for the great efforts of the Aomori Prefecture and Rokkasho Village in producing high quality living and educational support for the EU researchers and their families in Rokkasho.
The 17th Broader Approach Steering Committee meeting will be held in Italy on 11 December 2015.
The 8th LIPAc Technical Meeting (LTM08) was held at the Garching antenna of Fusion for Energy (F4E) from 24th to 26th November 2015. More than 30 experts from different involved institutes, including CEA (Saclay, France), INFN (Legnaro, Italy), JAEA (Rokkasho, Japan), CIEMAT (Madrid, Spain), F4E (Garching, Germany) and the IFMIF/EVEDA Project Team; attended the meeting. In addition, Japanese experts from KEK and J-PARC were invited to attend on behalf of JAEA.
The first day was devoted to satellite meetings where the cryomodule assembly and licensing; and the control system were discussed in detail.
Detailed technical information was presented highlighting the significant progress that has been made for the manufacture and installation of various components since the previous LTM07 (held in Rokkasho on 15-17 June). The progress on Injector commissioning, as shown by the Deputy Director of the Department of Fusion Reactor Materials research at the JAEA Rokkasho Fusion Institute, Keishi Sakamoto, on behalf of Yoshikazu Okumura, the Head of the ILIC unit; was warmly appreciated.
Key activities which were completed on site during 2015 include:
- 29 June : Establishing the radiation controlled area
- 7 July : 1st D+ beam
- 15 July : Facility inspection
- 1 Sep : 1st arrival of the RF module to Rokkasho
- 9 Sep : Start phase A-2
- 22 Oct : Injector LCS upgrade
- 9-13 Nov : Injector resistor repair
The main outcomes presented during the meeting are listed below:
Injector commissioning resumed on 22nd April, and the first deuterium beam was produced two months later on 22nd July 2015 after receiving the authorization from the Regulatory Authority on 15th July. With the change of the plasma electrode aperture diameter from 10 mm to 12 mm, a 100keV/145mA/9.5% Deuteron beam was produced. The upgrade and integration of the Local Control System into Central Control System was completed on 23rd October.
- RF power systems
Installation of seven HVPS’s and two RF modules for the RFQ, transformers and the HV breakers on the electrical platform was nearly completed. While the activity continues, there has also been much progress in the installation of cable trays inside the RF area.
The RFQ will be shipped from Legnaro (Italy) to Japan by air freight by the end of January 2016, while the associated cooling skid, piping and accessories will be shipped during December 2015. All remaining components will be shipped to Rokkasho by the end of April 2016.
On behalf of JAEA, Feedback was provided by Morishita-san explaining his experience of RFQ construction, installation and commissioning at J-PARC in Japan.
With the exception of the second buncher, for which the tests are ongoing, all MEBT subcomponents have passed their acceptance tests. The assembly of the subcomponents is approaching completion, and it is expected that the complete MEBT will be sent to Rokkasho by the end of January 2016.
Manufacture of The LPBD is underway, and will be completed in early 2016.
- SRF Linac
Manufacturing contracts for all critical components have been placed, and the tender process for a number of non-critical-path items has started. Licensing activities for the complete cryomodule continue, and informal approval for the cavity design has been given by KHK. Formal approval is expected soon.
Sakai-san (KEK) presented KEK’s experience of installation and commissioning of the cERL SRF LINAc. While the cERL LINAc is fundamentally different to IFMIF / EVEDA’s, the presentation provided useful insight which will be considered as the detailed cryomodule assembly procedure is developed.
Assembly of the D-plate is nearing completion, and the fully integrated and aligned assembly will be ready for shipment at the end of January 2016.
- HEBT/Beam Dump
The water cooling skid was recently tested and is now ready for shipment. Preparation of the shipping contract is underway, and the skid will be shipped by the end of December 2015. The main components of the Beam Dump conceptually designed and the detailed design is progressing. Technical specifications for a number of HEBT components are nearing completion and several manufacturing contracts have been launched, particularly electro deposition for the inner cone which started in November 2015
The Personnel Protection System has been modified to comply with regulatory requirements. The Machine Protection System has been enhanced to comply with the evolving operational requirements for injector commissioning. The Injector LCS has been fully integrated into the CCS.
A pleasant event on the second evening of the meetings was held at restaurant “Maisberger hotel” at Neufahrn
See you at the next LTM09 in Rokkasho (Japan)!