The 26th International Conference on Accelerators and Beam Utilizations

Session

KOPUA

20

Nov 14, 2024, 10:20 AM

4F Ruby Hall

Conveners

KOPUA

• Yun Hee Shon (Biomedical Research Institute, Kyungpook National University Hospital, Daegu, Republic of Korea)

KOPUA

• Hong-Ju Kim
• Seung Jeong Noh (KAPRA / SNU)

KOPUA: KOPUA 2024 Group Photo Taking

• There are no conveners in this block

KOPUA: General Meeting

• There are no conveners in this block

KOPUA: Opening Address

• Sunghwan KIM (Cheongju University)

64. Transient superhydrophilic surface modification of polyimide by metal ion beam irradiation

Sunmog Yeo (Korea Atomic Energy Research Institute)

11/14/24, 10:30 AM

KOPUA

Oral

Polyimide is commonly used as a substrate for flexible electronic devices because of its excellent thermal, physical, and electrical properties. To enhance the adhesion between substrates and electrodes, it is necessary to improve the hydrophilic properties of the polyimide. Various surface treatments such as plasma treatment, laser ablation, and ultraviolet treatments, have been applied for...

139. Proton fusion reactions under high temperature: Finding a new sun

Prof. Seung Jeong Noh (KAPRA / SNU)

11/14/24, 10:50 AM

KOPUA

Oral

According to the Big Bang theory, the universe began about 14 billion years ago, and light elements such as hydrogen and helium were created after several minutes of the universe's beginning. Inside the sun, proton fusion reactions under high temperature and high pressure generate 400 YJ (yottajoules, 10**24 joules) of energy per second, which is about 700,000 times the amount of global energy...

62. Development of flexible radiation detector based of nanomaterials

Dr Jeong Min Park (Korea Atimoc Energy Research Institute)

11/14/24, 11:10 AM

KOPUA

Oral

Organic scintillators are widely used in nuclear and particle physics, as well as homeland security applications, due to their low cost and ease of fabrication. However, their application is limited by their low effective atomic number, reducing detection efficiency for high-energy X-rays and γ-rays. To improve this, studies have explored incorporating nanocrystals into organic scintillators....

50. Synthesis of ZnO Thin Films Using the Sol-Gel Method and Ion Beam Irradiation

Gi Wan Jeon (Korea Multi-purpose Accelerator Complex, Korea Atomic Energy Research Institute, Gyeongju, Gyeongbuk, 38180, Republic of Korea)

11/14/24, 2:30 PM

KOPUA

Oral

ZnO thin films are semiconductor films used in LEDs. Using the sol-gel method, a ZnO precursor solution is prepared and deposited via spin-coating. Subsequent heat treatment at temperatures above 200°C results in the formation of ZnO thin films. However, when utilizing ZnO thin films on flexible substrates, the temperature cannot exceed 200°C. Additionally, ZnO thin films produced at 200°C...

73. Structural Control and Electrical Property Modulation of γ-GeSe via Ion Beam Implantation

Prof. Kwanpyo Kim (Yonsei University)

11/14/24, 2:50 PM

KOPUA

Oral

γ-GeSe, a newly discovered hexagonal polymorph from the group IV–VI monochalcogenides, has attracted significant attention due to its unique bonding configuration and high electrical conductivity by Ge vacancies. This material exhibits intriguing metallic behavior, making it a promising candidate for electronic and thermoelectric applications. In this study, we investigated the structural...

143. Reduced Set-Shifting Processing Speed in Male Rats Following Exposure to Low (10 cGy) Doses of Proton Radiation

Dr Hui Ho Vanessa Chang (Inha University)

11/14/24, 3:10 PM

KOPUA

Oral

Space radiation (SR) exposure poses a threat to astronaut health, including the central nervous system, during long-duration space missions. Previous animal studies have demonstrated a range of cognitive impairments following exposure to mission-relevant doses (<25 cGy) of various energetic SR particles. One such impairment involves SR-induced attenuation of attentional set-shifting ability, a...

129. Defects engineering in shallow acceptors in Zn$_{0.8}$Al$_{0.2}$O alloy via N$^{+}$ ion beam irradiation

Jun Kue Park (Particle Beam Research Division, Korea Multi-purpose Accelerator Complex, Korea Atomic Energy Research Institute)

11/14/24, 3:30 PM

KOPUA

Oral

Here, we find that N$^{+}$ ion beam irradiation with an energy of 40 keV may create oxygen-related shallow acceptors in Zn$_{0.8}$Al$_{0.2}$O alloy. After the N$^{+}$ beam irradiation with a fluence of 1×$10^{16}$ ions/cm$^{2}$ (N16) a newly emerged signal with g=2.007 in electron spin resonance (ESR) spectroscopy corresponds to a longer decay time $\tau$=15.6 ns in time-resolved...