Characterization of the beam profile for the PIXE/PIGE beam line at the CRC proton cyclotron

Park, Sae-Hoon; Kim, Yu-Seok

doi:10.3938/jkps.63.1291

Cited by 3 publications

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“…Particle-induced X-ray emission is a nondestructive technique used for determining the elemental composition of materials or samples. This method has been applied in many different fields using low-energy protons (1)(2)(3)(4)(5); protons with this energy can be generated at MeV accelerator facilities [1]. PET cyclotrons (of 13 MeV) have been proposed for providing a beam of protons with energy of several MeV for designing the beamline for multipurpose applications.…”

Section: Introductionmentioning

confidence: 99%

“…The emittance of a PET cyclotron has not been measured at the latter part of cyclotron target. The beam profile has already been measured and the beam size and the divergence were shown to be linearly related [2]. However, to extract the external beamline, we measured the beam profile and the emittance by using a diagnostic device employing a more precise measurement method.…”

Section: Introductionmentioning

confidence: 99%

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Emittance Measurement for Beamline Extension at the PET Cyclotron

Park

Lee

Kim

2016

Science and Technology of Nuclear Installations

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Particle-induced X-ray emission is used for determining the elemental composition of materials. This method uses low-energy protons (of several MeV), which can be obtained from high-energy (of tens MeV) accelerators. Instead of manufacturing an accelerator for generating the MeV protons, the use of a PET cyclotron has been suggested for designing the beamline for multipurpose applications, especially for the PIXE experiment, which has a dedicated high-energy (of tens MeV) accelerator. The beam properties of the cyclotron were determined at this experimental facility by using an external beamline before transferring the ion beam to the experimental chamber. We measured the beam profile and calculated the emittance using the pepper-pot method. The beam profile was measured as the beam current using a wire scanner, and the emittance was measured as the beam distribution at the beam dump using a radiochromic film. We analyzed the measurement results and are planning to use the results obtained in the simulations of external beamline and aligned beamline components. We will consider energy degradation after computing the beamline simulation. The experimental study focused on measuring the emittance from the cyclotron, and the results of this study are presented in this paper.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Emittance Measurement for Beamline Extension at the PET Cyclotron

Park

Lee

Kim

2016

Science and Technology of Nuclear Installations

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External beam’s nozzle design for the CRC cyclotron PIXE/PIGE

Choi

Kim

2015

Journal of the Korean Physical Society

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Characteristics of proton beams and secondary neutrons arising from two different beam nozzles

Choi

Kim

2015

Journal of the Korean Physical Society

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Tandem or Van de Graaff accelerator with an energy of 3-MeV is typically used for PIXE analysis. In this study, the beam line design used in PIXE analysis was used to increase the production of isotopes instead of the typical low-energy accelerator from a 13-MeV cyclotron.For PIXE analysis, the proton beam should be focused at the target through the use of a nozzle after degrading the proton beam energy from 13-MeV to 3-MeV using an energy degrader. Previous studies have been conducted to determine the most appropriate material and thickness of the energy degrader. Based on the energy distribution of the degraded proton beam and the neutron occurrence rate at the degrader an aluminum nozzle of X thickness was determined to be the most appropriate nozzle construction. Neutrons are created by the collision of 3-MeV protons into the nozzle after passage through energy degrader. In addition, a sufficient intensity of proton beam is required for non-destructive analysis of PIXE. Therefore, in order to optimize nozzle design, it is necessary to consider the number of neutrons which arise from the collision of protons inside the nozzle, as well as the track direction of the generated secondary neutrons, with the primary aim of ensuring a sufficient number of protons passing through the nozzle as a direct beam. A number of laboratories are currently conducting research related to the design of nozzles used in accelerator fields, mostly relating to medical fields. In this paper, a comparative analysis was carried out for two typical nozzle shapes in order to minimize losses of protons and generation of secondary neutrons. The neutron occurrence rate and the number of protons after passing through the nozzle were analyzed using a Particle and Heavy Ion Transport code System (PHITS) program, in order to identify the nozzle which generated the strongest proton beam.

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Characterization of the beam profile for the PIXE/PIGE beam line at the CRC proton cyclotron

Cited by 3 publications

References 3 publications

Emittance Measurement for Beamline Extension at the PET Cyclotron

Emittance Measurement for Beamline Extension at the PET Cyclotron

External beam’s nozzle design for the CRC cyclotron PIXE/PIGE

Characteristics of proton beams and secondary neutrons arising from two different beam nozzles

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