6th LIPAc Technical Meeting

Rokkasho, Japan, 26-28 November 2014
LTM-06 Group photo
LTM-06 Participants (Group photo)

The 6th LIPAc Technical Meeting (LTM06) was held in Rokkasho, BA site Fusion Energy Research Center (Japan), from 26th to 28th November 2014.

More than 40 participants, from CEA (Saclay, France), INFN (Legnaro, Italy), JAEA (Rokkasho, Japan), CIEMAT (Madrid, Spain), F4E (Garching, Germany) and PT of IFMIF/EVEDA attended the meeting to discuss progress in the design, manufacturing, installation and commissioning of the LIPAc (Linear IFMIF Prototype Accelerator).

Much technical information was exchanged by the various presenters, showing the status of the different components. After the previous LTM05, held in Legnaro (Italy), a lot of progress has been made, demonstrating the strong effort of the entire LIPAc community in Japan and Europe.

Partial view of attendees to LTM06
Partial view of attendees to LTM06

Important milestones were reached in the project and presented in detail during the meeting:

  • Injector First Plasma! On 23th of October 2014. The first plasma was produced with 80W of RF power and a gas flow of 1.9 sccm at 75kV. The following day the RF power was incrementally to 130W.
  • Injector First H+ Beam (Accelerator Vault was set under controlled area) 4th November 2014 at 16:18 the first beam was extracted; H+ Beam at 70KeV/40mA, 46.7 mA, Faraday cup current 100 ms/s 10% duty. In the two following days of Injector commissioning were reached 105mA of beam current, great result!
  • The RF power systems; 8 HVPS dedicated to the RFQ have already been manufactured, three of them have already been tested, and the remaining five are ready for test. They are expected to be delivered to Rokkasho in the first trimester of 2015.


Production of the first plasma
Production of the first plasma
Injector operator station in the control room










Key MEBT components are already integrated and the conditioning of the buncher is progressing well. The MEBT is expected to arrive in Rokkasho after summer 2015.

  • The LPBD final report was delivered and design for manufacture is now ongoing. The cooling system was confirmed stand-alone system, and the licensing strategy clarified.

    Injector LEBT-FC and beam stopper
    Injector LEBT-FC and beam stopper
  • The SRF Linac design is basically finished and manufacturing contracts for the critical components are now being placed. The licensing strategy is ongoing…
  • The D-Plate will be completely assembled by the end of 2014 and ready for shipment after summer in 2015.
  • The HEBT and Beam Dump main components have been completely designed, the associated technical specifications are nearing completion and several manufacturing contracts have been launched.
  • PPS-MPS and LCS are now in operation controlling the injector operation, some modifications will be necessary for the next phase.

A site visit of the Accelerator Prototype Building was held, so all participants could see the installed injector. The injector was assembled by JAEA and their subcontractor, with the assistance of CEA experts, positively demonstrating the close collaboration between all parties.

HV Platform and ion source view
HV Platform and ion source view

We are now eagerly awaiting the end of the commissioning phase of the Injector, with an expected completion date of July 2015. The next step will be the installation of the RF power system components, followed by the installation of the RFQ, MEBT, D-plate and LPBD. Since it was announced the arriving of a wealth of components in 2015, we must be all ready for their installation in parallel with other activities.


See you next LTM07 in Rokkasho:

LTM07 is planned for the 15th -19th June 2015, and will be held again in Rokkasho (Japan).

Hakkoda, snow monsters
Hakkoda mountains










LIPAc, North-West view