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Development of Proton Beam Control Technology for Nuclear Transmutation Research
—Success in Confirmation Test of Low-Power Proton Beam Extraction Technology—

Typically, an electromagnet or a stripping foil is used to extract a low-power proton beam from a high-power proton beam; however, such techniques have had a problem of the beam power being unstable.

We have developed a system in which a low-power proton beam is extracted from a high-power proton beam by colliding with a bright laser light in an electromagnet.

Through the use of this technology, we have achieved a milestone in the effort to promote the research and development of an accelerator-driven nuclear transmutation system utilizing J-PARC.

In the future, it is anticipated that this technology will lead to further advancement of the usage of a variety of accelerator beams, such as short-pulse proton beams.


New type of laser charge exchange (LCE) device
LCE devices were installed at the end of the 3-MeV negative-hydrogen (H-) linac. The H- beam (orange arrow) was collided with the laser light (pink arrow) in an electromagnet.

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