Tuning of RF amplitude and phase of J-PARC DTL and SDTL

Shen, G.; Sako, Hiroyuki   ; Sato, Susumu  ; Ikegami, Masanori*

An accurate tuning has been performed for the RF amplitude and phase of J-PARC (Japan Proton Accelerator Research Complex) LINAC during the beam commissioning. The tuning has been performed using a phase-scan method for all RF cavities, including buncher, debuncher, DTL (Drift Tube LINAC), and SDTL (Separate-type DTL). An adequate set-point is determined with satisfied accuracy, which is within 1; for phase and 1% for amplitude, by matching measured absolute beam energy with those from a modeling. This paper presents detail procedures of RF tuning.