CYCLOTRONS2022 - List of Authors (Miyawaki, N.)

Paper	Title	Page
MOPO013	Experimental Study of Beam Energy Control at the TIARA AVF Cyclotron	83
	N. Miyawaki, N.S. Ishioka, H. Kashiwagi, S. Kurashima, S. Watanabe QST/Takasaki, Takasaki, Japan M. Fukuda RCNP, Osaka, Japan
	The TIARA AVF cyclotron provides a He beam for production of At-211 as one of many beam applications. The production rate of At-211 increases with the energy of the He beam, but contamination of Po-210 produced by radioactive decay of At-210, which is generated by the energy of above 29 MeV, must be prevented for medical applications. Therefore, the energy of the He beam must be precisely measured and controlled. A time-of-flight beam energy monitor in the straight beamline from the cyclotron was installed to measure the beam energy in real time. The beam energy was arbitrarily controlled within a range of about 1% by adjusting the cyclotron magnetic field and accelerating voltage, which are the possible causes of the beam energy change. Using this control, we investigated the rate of formation of At-211 and At-210 as the beam energy was varied. As a result, we confirmed the energy generating At-210 and both production rates increased with the energy of the He beam.
	Poster MOPO013 [1.010 MB]
DOI •	reference for this paper ※ doi:10.18429/JACoW-CYCLOTRONS2022-MOPO013
About •	Received ※ 27 December 2022 — Revised ※ 28 January 2023 — Accepted ※ 09 February 2023 — Issue date ※ 14 March 2023
Cite •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

Paper

Title

Page

Experimental Study of Beam Energy Control at the TIARA AVF Cyclotron

83

N. Miyawaki, N.S. Ishioka, H. Kashiwagi, S. Kurashima, S. Watanabe
QST/Takasaki, Takasaki, Japan
M. Fukuda
RCNP, Osaka, Japan

The TIARA AVF cyclotron provides a He beam for production of At-211 as one of many beam applications. The production rate of At-211 increases with the energy of the He beam, but contamination of Po-210 produced by radioactive decay of At-210, which is generated by the energy of above 29 MeV, must be prevented for medical applications. Therefore, the energy of the He beam must be precisely measured and controlled. A time-of-flight beam energy monitor in the straight beamline from the cyclotron was installed to measure the beam energy in real time. The beam energy was arbitrarily controlled within a range of about 1% by adjusting the cyclotron magnetic field and accelerating voltage, which are the possible causes of the beam energy change. Using this control, we investigated the rate of formation of At-211 and At-210 as the beam energy was varied. As a result, we confirmed the energy generating At-210 and both production rates increased with the energy of the He beam.

Poster MOPO013 [1.010 MB]

DOI •

reference for this paper ※ doi:10.18429/JACoW-CYCLOTRONS2022-MOPO013

About •

Received ※ 27 December 2022 — Revised ※ 28 January 2023 — Accepted ※ 09 February 2023 — Issue date ※ 14 March 2023

Cite •

reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)