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Report No.

Longitudinal bunch size measurement using an RF deflector

Otani, Masashi*; Futatsukawa, Kenta*; Hirano, Koichiro  ; Kondo, Yasuhiro   ; Miura, Akihiko ; Oguri, Hidetomo  ; Liu, Y.*

It is extremely important to diagnose beams in accelerators to improve accelerator operation. In the low velocity section of a proton or heavy ion linac, the diagnostic method for longitudinal beam properties is less established compared to that for transverse properties. We have developed a new diagnostic method for the longitudinal bunch size by utilizing an RF deflector. We evaluated the uncertainty in bunch size measurement through simulation, and it was obtained as 0.5$$^{circ}$$. In addition, we measured longitudinal beam emittance through bunch size measurements at several RF amplitudes of an upstream buncher. The measured emittance was 0.13$$pm$$0.01$$pi$$ deg$$cdot$$MeV, which was consistent with the simulation result.



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Category:Instruments & Instrumentation



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