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壁報論文報名列表 (2025/7/2 17:00更新)

(1)實體壁報論文海報板張貼範圍為85cm寬X 115cm高

(2)7/3 13:00 前須張貼壁報論文

(2)7/3 13:00 ~ 15:30 請務必於壁報論文前接受詢問

P01  李耕儒  成功大學電漿所 

Theoretical model of laser-driven proton acceleration via hybrid scheme based on KPSI J-KAREN-P 1-PW laser

Keng-Ju Lee, Yao-Li Liu, Shivam Gupta, S. Isayama, Shih-Hung Chen and Yasuhiro Kuramitsu

We propose a theoretical model for the hybrid scheme of laser-driven proton acceleration and compare it with particle-in-cell simulations. It shows that proton energy achieves 0.5 GeV by J-KAREN-P laser with an only 2.3% error.

P02  陳正典  成功大學電漿所 

福衛八號科學酬載研製 - 多重太空粒子分析儀之前端類比電路系統設計

陳正典、顏子恩、鄭鈺融、蔡勝丞、張滋芳、江致宇

多重太空粒子分析儀(MPA, Multiple Particle Analyzer)主要用於量測磁暴、副磁爆等現象發生時所產生介於1~200 keV能量範圍內之電子、離子、中性粒子。而為了解析這些能量粒子需要經過一系列的類比及數位訊號處理，將粒子訊號進行放大、整波、取樣，最後繪製成具有科學參考價值的能譜。

P03  Shivam Gupta 成功大學電漿所 

Numerical Investigation of Highly Charged Tin Ions for the Extreme Ultraviolet Light Sources

Shivam Gupta

Extreme ultraviolet (EUV) light at 13.5 nm has emerged as a critical radiation source for advanced lithography applications, driving the continual evolution of semiconductor manufacturing. Among the candidate elements for EUV generation, tin (Sn) has proven to be the most effective, as its highly charged ions exhibiting strong resonance transitions within the required 13.5 nm wavelength range [1-2]. Sn-based plasma sources generally achieve higher conversion efficiencies, making Sn the preferred choice for industrial EUV sources. Laser-produced tin plasmas (LPPs) are particularly advantageous because of their high efficiency in the 13.5 nm wavelength range. The emission spectrum of these plasmas is predominantly governed by highly charged tin ions, specifically those in charge states from Sn5+ to Sn15+. This emission primarily from Sn5+ to Sn15+ ions, appears in unresolved transition arrays (UTAs) due to spectral line blending from adjacent charge states, complicating spectroscopic investigations. The calculation of conversion efficiency (CE) of an LPPEUV light source is sensitive to the precision of the radiative data, including line positions and intensities, used in the simulations. Comprehensive benchmarking of the atomic structure, and electron collision parameters is necessary for the development of a theoretical plasma model. In light of this, the EUV emission spectra from different tin ions is theoretically computed through detailed atomic structure and collisional-radiative (CR) model calculations.

P04  劉哲宇  成功大學電漿所 

Studies of the criteria of exploding a rod

Che-Yu Liu, Jui-Che Wang, Fu-Yu Tsai, Po-Yu Chang

We are studying the dynamics of an exploding silicon rod. Silicon nanoparticles can be generated during the explosion so that the exploding silicon rod can be widely used in industry. In each experiment, a silicon rod with a 1 mm × 1 mm rectangular cross-section was driven by a 1-kJ pulsed-power system. The voltage of the pulsed-power system was 20 kV. The peak current and the rise time of the pulsed current were ~ 100 kA and ~ 1.6 μs, respectively. Time-resolved shadowgraph, schlieren, and interference images were taken using a 532-nm Q-switch laser with a pulse width of ~ 5 ns. When the high voltage was applied to the silicon rod, a silicon plasma with an inferred temperature of ~ 32 eV surrounding the rod was generated. The corresponding resistivity of the plasma was 3.72 × 10-2 Ω • m. It was smaller than that of the silicon rod which is 6.4 × 102 Ω • m at room temperature. Therefore, most current did not flow through the silicon rod so that it did not explode. On the contrary, in the experiment where a Tin rod exploded, the rod fully exploded. It was because the resistivity of Tin was 1.08 × 10-7 Ω • m, which was much lower than that of the plasma. Therefore, most of the current flew through the Tin rod so that it exploded after the experiment. The other experiment which places the silicon rod in the water to increase the resistivity of the plasma shows the silicon rod will fully explode. The results indicated that the resistivity of the rod and the generated plasma played an important role in exploding rods. Only in the case where the resistivity of the rod is lower than that of the surrounding plasma, the rod can be fully exploded.

P05  劉秉儒  成功大學電漿所 

應用於太空環境的離子束校正系統

劉秉儒、顏子恩、蔡勝丞、鄭鈺融、江致宇、張滋芳

由於宇宙中的粒子密度極低，為了模擬太空中實際帶能量的電漿分布，創造出可調控的離子密度與能量關係，我們利用實驗室的真空系統環境進行參數調整，進而精確的控制離子的種類、能量及其強度，使太空儀器在開發過程中，能透過這套標準源系統進行校正，了解儀器在太空環境中面對不同能量離子束的實質轉換公式，進而獲得量測物理量。

P06  李宗懋  成功大學電漿所 

Development of a D-band Interferometer for Plasma Density Measurements in the Formosa Integrated Research Spherical Tokamak (FIRST)

李宗懋

To support the upcoming Formosa Integrated Research Spherical Tokamak (FIRST), Taiwan's first high-temperature plasma device, we are developing a D-band (110–170 GHz) microwave interferometer for non-invasive, line-integrated electron density measurements. The interferometer measures the phase shift of a microwave beam as it passes through the plasma, which is proportional to the line-integrated electron density along the propagation path. The system adopts a heterodyne detection scheme with a shared optical path and utilizes concave mirrors to shape and align the millimeter-wave beam for optimal focus and propagation. A dichroic mirror is used to align a visible laser for optical-path calibration while allowing transmission of the microwave beam. Preliminary laboratory tests have confirmed the system’s ability to detect phase shifts under simulated plasma conditions. This poster will present the interferometer principle, system design, beam-shaping by concave mirrors, optical calibration strategy, and preliminary test results.

P07  莊詠安  成功大學 

半導體偵測器於太空粒子研究

莊詠安、張宗瑋、顏子恩、江致宇、張滋芳 (D4 Space Lab)

本團隊開發用於太空粒子偵測的固態半導體偵測器(SSD)，利用高能帶電粒子穿透性在半導體中產生電子-電洞對的原理，在偏壓的作用下，轉換為可量測的電訊號。我們自製偵測模組，在多個單位合作下完成數十道半導體製程，並在完成成品後進行偵測器品質測量，包含洩漏電流與電容值的基本特性都呈現在本發表中。

P08  Yuan-Yao Chang    成功大學電漿所 

Development of calibration method of electron cyclotron emission radiometer for optically-thin magnetized plasma

Yuan-Yao Chang*, Eiichirou Kawamori

Electron cyclotron emission (ECE) is a well-established technique for measuring electron temperature in optically thick plasmas. However, the conventional ECE-based method is primarily applicable to optically thick plasmas, and a reliable approach for determining electron temperature in optically thin plasmas has yet to be established or widely accepted by the plasma physics community.

In this study, we propose a new calibration method to determine electron temperature in optically thin plasmas using the intensity ratio of ECE harmonics.

This method is based on the Schott–Trubnikov formula [1] for the ECE spectrum, through which we aim to establish a relationship between temperature and emission intensity under optically thin conditions.

Figure 1 shows the relationship between the intensity ratio of the second and third harmonics calculated from the Schott–Trubnikov formula for the electron density ne of 10^16~10^17 m−3, magnetic field 0.05~0.1 T, which are our typical parameters in our experiment device. Two key points: First, the intensity ratio and temperature have a one-to-one relationship. Second, changes in background parameters have minimal impact on the curve derived from the equation. 

To verify this idea, we conduct a laboratory experiment using the Magnetized Plasma eXperiment (MPX) device at National Cheng Kung University, Taiwan. The MPX is a mirror machine that can generate linear magnetized plasma by exciting the LaB₆ coating on the hot cathode, and five pancake-shaped coils are used to generate magnetic field to confine the plasma. A Langmuir probe (LP) is used to measure the reference electron temperature, while ECE measurement is simultaneously performed using a radiometer. The signal passes through a 2-way power divider and is subsequently amplified with gains of 20 dB and 45 dB in separate channels. The intensities of the second and third harmonic emissions are analyzed to determine the correlation between temperature and intensity ratio.

In the presentation, we will compare the theoretical calculations with the experimental data and discuss the applicable parameter ranges and related considerations.

This calibration technique is expected to be applied to electron temperature measurements in Taiwan’s first spherical tokamak, as part of the ongoing ST (FIRST) project led by the Taiwanese plasma research community.

P09  Lin Keng-Yu  成功大學物理系 

Development of a 3D B-dot Probe for Measuring Magnetic Fields Inside a Tokamak

Keng-Yu Lin(1), Po-Yu Chang(2)

1 Department of Physics, National Cheng Kung University

2 Institute of Space and Plasma Sciences, National Cheng Kung University

Taiwan is currently building a magnetic confinement nuclear fusion experimental device called Tokamak, named Formosa Integrated Research Spherical Tokamak (FIRST). Since plasma in a tokamak is confined by magnetic fields, it is essential to measure the magnetic field of the tokamak. Therefore, we are developing a 3D B-dot probe, an instrument planned for measuring the local magnetic field. By measuring the magnetic field at specific points, we can determine the distribution of the background magnetic field, which in turn allows us to understand the conditions at the plasma edge inside the reactor. The design and testing of the B-dot probe will be presented.

P10  鄭鈺融  成功大學 

Utilizing FPGA to carry out the all-sky electrostatic analyzer system functions in the lunar mission

Yu-Rong Cheng, Tzu-Fang Chang*, Chih-Yu Chiang, Tzu-En Yen, Sheng-Cheng TSAI, Zhao-Yu Huang, Pei-Ying Kuo, Yung-Tsung Cheng, Shiuan-Hal Shiu, Shu-Chun Huang, Cheng-Lin Tsai, Sin-Fa Lin

In this study, we introduce the all-sky electrostatic analyzer (A-ESA) developed for the lunar rover payload project by D4 Space Lab. The instrument developed for this mission will be mounted on a lunar rover. Therefore, its design must comply with several payload constraints. The use of FPGA to carry out the system functions of the A-ESA under limited constraints. The system functions are divided into the electrical system and the control system. In the electrical system of the instrument, the 28V power source is converted into ±12V, 5V, and 3V, allowing various systems within the instrument to operate normally. The control system is led by the FPGA chip. This study features a low-power FPGA chip with MCU functionality. We have designed the FPGA to effectively connect with the electrical system to achieve the set instrument operation modes. The operation mode is divided into two modes: survival mode and working mode. The working mode cycles through four states. By integrating the FPGA with the MCU, we can effectively control various aspects of the instrument under different states. Finally, we successfully collect plasma particles and analyze their energy and directionality under limited constraints.

Keywords: space plasma; all-sky electrostatic analyzer; lunar rover; payload; FPGA.

P11  Che-Men Chu    成功大學

Design of Poloidal Field Coils for Achieving Equilibrium State of Mini-Tokamak

Che-Men Chu, Po-Yu Chang

We employ FreeGS, an open‐source Grad–Shafranov solver, to compute and optimize the steady‐state magnetic equilibrium of a compact mini‐tokamak. The simulation is initialized with an on‐axis pressure of 10.32 Pa, a total plasma current of 10 kA, and a vacuum toroidal‐flux coefficient 𝑓 = 𝑅 𝐵𝑡 = 0.0085 𝑊𝑏/𝑚. We then vary the radial and vertical positions of four poloidal field coils to sculpt the desired separatrix shape, using an objective that minimizes peak Lorentz forces while strictly preventing any plasma–wall intersection. A two‐stage procedure—first optimizing both coil radius and height, then refining height only—converges to coil currents below 2 kA and an equilibrium that meets all geometric and mechanical constraints. Key performance metrics, including the safety-factor profile 𝑞(𝜓), poloidal beta, and magnetic-axis location, are evaluated before and after optimization, demonstrating enhanced MHD stability margins and reduced coil loading. Finally, the optimized coil geometry, coil currents, safety‐factor curves, and coil force distributions will be presented to demonstrate the efficacy of this approach.

P12  Bing-Huang He   成功大學電漿所 

Development of pneumatic controlled relay for Formosa Integrated Research Spherical Tokamak (FIRST)

Bing-Huang He, Po-Yu Chang

We are developing a pneumatically controlled relay for driving coils of FIRST. It works to stop the output current when the switching system is damaged by the electromagnetic pulses(EMPs). To achieve this goal, we use Paschen’s curve to estimate the required distance between the electrodes, ensuring that no arcing occurs when the relay is switched off. The system consists of three main components: Switching electrodes, the reciprocating device, and the air cylinder to drive the system. This poster presents a full view of the relay, our method for determining

Paschen’s curve, a 3D printed prototype and an outlook on future development.

P13  Jean Nelson   成功大學電漿所 

Development of the current Driver Module for mini-Tokamak 

Jean Nelson(1), Chun-Yi Chen(2), Yung-Wei Pi(1), Che-Men Chu(1), Bing-Hao He(1), Po-Yu Chang(1)

1 Institute of Space and Plasma Sciences, NCKU

2 International Bachelor Degree Program on Energy Engineering, NCKU

This work presents the development of a current driver capable of providing a pre-designed current profile for the Toroidal Field Coils (TFCs) of the mini-Tokamak, alongside the design and implementation of a mini Tokamak. The mini-Tokamak, a table top setup, has been developed for two main purposes: (1) to test current drivers for achieving specific current profiles and (2) to evaluate diagnostic components such as the B-dot probe. The goal of this device is to replicate conditions found in larger-scale systems within a compact form factor. This setup will serve as a testing environment for components intended to be used in the Formosa Integrated Spherical Tokamak (FIRST), a spherical tokamak currently being designed in Taiwan. Additionally, this system serves as an interactive educational platform, offering hands-on experience for newcomers to the field. The setup features a cylindrical vacuum chamber with a diameter of 320 mm and a height of 500 mm, generating a spherical tokamak with a major radius of 85 mm and a minor radius of 55 mm. A toroidal field of ~ 0.1 T at 85 mm can be provided when the TFCs are driven by a current of ~10 kA. The current will be provided by several current drivers connected in parallel. So far, we show a fully functional module handling up to 1400A. This module is made up of an Infineon IGBT Half Bridge module in which we only employ a single IGBT while using the diode of the other IGBT, while keeping the unused switch open throughout the operation. The design and the testing results will be presented.

P14  Tzu-Chi Liu   成功大學電漿所 

Development of ECE/EBE Radiometer for T_e(R, t) Measurements on FIRST

Tzu-Chi Liu, Eiichirou Kawamori

To evaluate the performance of fusion plasmas, radial profiles of electron temperature (along with its time evolution) is one of the key quantities that should be diagnosed routinely. Electron cyclotron emission (ECE) is a widely-adopted diagnostic for such purposes, where the intensity of the measured spectrum directly relates to the temperature under the condition of optically-thick plasmas, while the radial position of the measurement may be inferred from the frequency with 1-to-1 correspondence. However, for high-beta plasmas where the plasma frequency surpasses the electron cyclotron frequency, ECE cannot be utilized due to the presence of cutoff regions for electromagnetic waves. For these scenarios, electron Bernstein emission (EBE) will be used instead of traditional ECE, since the electrostatic nature of Bernstein waves allows it to freely propagate inside overdense plasmas. Here we report about the current planned setup of a 16 channel heterodyne radiometer, covering 18-50 GHz, that will be installed on the FIRST spherical tokamak for ECE/EBE diagnostics. Design of the optical system for focusing of the plasma emission along with preliminary experimental tests conducted at the MPX mirror device will also be presented.