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Synchronization system of ion source RF and cavity RF in J-PARC linac

Shibata, Takanori*; Hirano, Koichiro  ; Hirane, Tatsuya*; Shinto, Katsuhiro   ; Hayashi, Naoki  ; Oguri, Hidetomo  

In J-PARC linac, the operation of an rf-driven high-intensity H$$^-$$ ion source was initiated in 2014. For plasma ignition, the 2-MHz rf amplifier outputs the power of several tens kW. However the rf amplifier for the ion source and those for the accelerating cavities have not been synchronized. As a result, the wave hights in the beam waveforms were different in shot by shot. Therefore, we have developed an synchronization system between the rf system for the ion source and those for the cavity systems and succeeded the same wave hights in the waveforms.

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