會議議程
2026/9/1(二)
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10:30 ~ 11:00 報到
11:00 ~ 12:00 電漿現象與太空與電漿科學所介紹 (張博宇所長)
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12:00 ~ 13:00 午餐(會議提供)
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13:10 ~ 14:00 Talk 1 陳秋榮教授 / Introduction of nuclear fusion energy research
14:10 ~ 15:00 Talk 2 張博宇副教授 / 台灣首座核融合研究設施「托克馬克」
15:00 ~ 15:30 Coffee Break
15:30 ~ 16:20 Talk 3 劉耀澧副教授 / 雷射電漿物理簡介
16:30 ~ 17:20 Talk 4 白植豪教授 / 雷射核融合
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2026/9/2(三)
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09:10 ~ 10:00 Talk 5 河森榮一郎教授 / Magnetic fusion experiments: history, recent developments and the tokamak in Taiwan
10:10 ~ 11:00 Talk 6 張滋芳助理教授 / 太空儀器開發
11:10 ~ 12:00 Talk 7 談永頤教授 / 太陽：太空天氣的根源
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12:00 ~ 13:10 午餐(會議提供)
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13:10 ~ 14:00 Talk 8 陳國益助理教授 / 如何從零開始專題：以磁浮飛輪電池為例
14:00 ~ 16:00 實驗室導覽及壁報論文(Coffee Break)
16:00 ~ 16:30 座談
16:30 議程結束
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(1)實體壁報論文海報板張貼範圍為85cm寬X 115cm高
(2)9/2 13:00 前須張貼壁報論文
(2)9/2 14:00 ~ 16:00 請務必於壁報論文前接受詢問
P01 陳正典 成功大學電漿所
福8C(FS-8C) 多重太空粒子能譜分析儀之電路設計與類比訊號處理
陳正典
太空並非完全真空，而是充斥著稀薄的電漿。當太陽風來襲時，會挾帶許多的能量粒子與輻射，對於地球的磁層、電離層都會有顯著的影響，並在地球的不同緯度產生諸多現象，俗稱太空天氣。本研究將設計並實現一套架構簡單但功能完整之類比前端電路系統 ( Analog Front-end circuit, AFEC )，安裝於多重太空粒子能譜分析儀 ( Multiple Particles Analyzer, MPA ) 上，同時此分析儀也將做為福衛八號的科學酬載，於低軌道太空環境進行電漿環境之探測，用於解析太空中範圍介於1 keV ~ 200 keV之能量粒子。
此外，本研究使用電路模擬軟體 (LTSpice) 進行初步的設計，輸入測試訊號並觀察輸出結果，模擬太空中能量粒子進入偵測器後的放大情況，並透過開源電路佈局軟體 (EasyEDA) 進行電路板設計並製作實體的電路板。最後將設計完成的類比前端放大電路板接受各項驗證，包含由訊號產生器提供訊號源檢驗電路板的訊號完整性與放大效果是否符合預期的基礎訊號測試，以及通過如熱循環 (Thermal Vacuum Cycling, TVC)、環境應力篩選 (Environment Stress Screening, ESS) 的太空環境檢測，驗證其於太空極端環境中依然能夠維持功能正常，具備「太空電路」之能力。
P02 Sachin Sharma 成功大學電漿所
Optical Emission Spectroscopy for Plasma Diagnostics in the MPX Device
Sachin Sharma, Eiichiro Kawamori
Optical Emission Spectroscopy (OES) is a non-invasive diagnostic technique that provides valuable information about the physical properties and composition of laboratory plasmas[1]. In this work, OES is investigated as a diagnostic tool for characterizing the plasma produced in the Magnetic Plasma eXperiment (MPX)[2]. The emission spectrum is analyzed to identify characteristic spectral lines originating from the working gas and possible impurity species. In particular, the intensity, relative population, and spectral broadening of selected emission lines can be used to investigate plasma conditions such as electron excitation processes, impurity content, and ion temperature. Doppler broadening of suitable spectral lines provides an opportunity to estimate the ion temperature, while the observation of impurity lines can provide information on plasma-wall interactions and impurity sources. The present study focuses on establishing an OES-based diagnostic approach for MPX and evaluating its capability for spectroscopic characterization of the plasma. The results are expected to provide complementary information to other plasma diagnostics and contribute to a better understanding of plasma behavior and impurity generation in MPX.
References:
1. M. A. Lieberman and A. J. Lichtenberg, Principles of Plasma Discharges and Materials Processing, MRS Bulletin, 30(12), 899-901 (1994).
2. Eiichirou Kawamori, et al. Lithium plasma emitter for collisionless magnetized plasma experiment. Rev. Sci. Instrum. 82 (9), 093502 (2011).
P03 Sachin Sharma 成功大學電漿所
Dusty Plasma: From Charged Dust to Waves and Vortices
Sachin Sharma
Dusty plasma is a complex plasma system in which micron or submicron sized solid particles become charged and interact with electrons, ions, and the surrounding plasma. In this work, an experimental dusty plasma system Shivalik Plasma Device - I (SPD-I) at IIT Jammu was utilised to investigate the behavior of charged dust particles under controlled plasma conditions [1]. Due to their slow dynamics compared to electrons and ions, they can be easily tracked using standard imaging setup. This characteristic makes dusty plasmas an ideal platform for studying flow, waves, instabilities, and turbulence at kinetic levels, even in fluid regimes.
Dust particles were introduced into a low-pressure DC discharge plasma, where they acquired electric charge through interactions with electrons and ions. The formation, confinement, and dynamics of the dust particles were observed as a function of the discharge and plasma conditions. Optical and imaging-based observations were used to characterize the dusty plasma and examine the response of dust particles to changes in the plasma environment. The presence of dust provides an additional charged component and can significantly modify plasma properties, collective behavior, and particle transport. The experimental results demonstrate the formation of a stable dusty plasma and various collective dynamics including waves, oscillations, vortices etc. [2,3].
References:
1. Sachin Sharma, et al. "Shivalik Plasma Device-I, a glow discharge device to study the collective dynamics of dusty plasma." AIP Advances 13.12 (2023).
2. Sachin Sharma, et al. "Shock wave bending around a dusty plasma void." Physics of Plasmas, 32, 10 (2025).
3. Sachin Sharma, et al. "Observation of Kolmogorov turbulence due to multiscale vortices in dusty plasma experiments." Physics of Plasmas, 31, 12 (2024).
P04 Z. Lee 成功大學電漿所
Taiwan Spherical Tokamak Project FIRST (Formosa Integrated Research of Spherical Tokamak) & its diagnostic systems using millimeter-waves
Z. Lee, E. Kawamori
The Formosa Integrated Research Spherical Tokamak (FIRST) is Taiwan's first spherical tokamak and is being developed at the National Atomic Research Institute (NARI) as a nationwide collaborative program involving NARI, National Cheng Kung University (NCKU), National Tsing Hua University (NTHU), and the National Center for High-performance Computing (NCHC). The FIRST project aims to establish a domestic experimental platform for magnetic confinement fusion research and to support studies of plasma equilibrium, confinement, transport, and stability in spherical tokamaks. Planned research topics include plasma operation with negative triangularity, investigations of electron-scale turbulence, and the development of advanced plasma diagnostics. The FIRST device has a major radius of approximately 0.45 m, a minor radius of approximately 0.32 m, a designed toroidal magnetic field of up to 0.5 T, a plasma current of approximately 100 kA, an electron density in the range of (10^{18})–(10^{19},\mathrm{m^{-3}}), and an electron temperature ranging from approximately 100 eV to 1 keV. Multiple diagnostic ports are incorporated into the device to accommodate magnetic, electrostatic, optical, and millimeter-wave diagnostics.
To support these research objectives, integrated millimeter-wave diagnostic systems are being developed for FIRST. The diagnostic systems include a D-band (110–170 GHz) microwave interferometer for line-integrated electron density measurements, an Electron Cyclotron Emission (ECE) diagnostic for localized electron temperature measurements, and a shared quasi-optical transmission and beam-combining system that accommodates multiple microwave diagnostics within the limited diagnostic access of the spherical tokamak. The optical layout has been designed to provide flexibility for future diagnostic expansion while maintaining efficient beam transmission and alignment.
An intermediate-frequency (IF) receiver system is currently under development as a common signal-processing platform for the millimeter-wave diagnostics. The receiver architecture consists of a common local oscillator distribution network, IQ down-conversion modules, IF amplification and filtering stages, and synchronized high-speed data acquisition. A unified IF architecture is adopted for multiple microwave diagnostic systems to reduce hardware complexity while preserving the phase and amplitude information required for plasma measurements. This common architecture also facilitates synchronization and cross-comparison among different millimeter-wave diagnostics.
A D-band microwave scattering diagnostic is also being developed for future implementation in FIRST. The planned scattering system is designed to access the electron-scale wavenumber range for measurements of density fluctuations associated with electron temperature gradient (ETG) turbulence. The common quasi-optical transmission system and IF receiver architecture provide compatibility among interferometry, ECE, and microwave scattering diagnostics within a unified diagnostic platform.
The integrated millimeter-wave diagnostic systems developed for FIRST will provide measurements of electron density, electron temperature, and electron-scale density fluctuations during future plasma operation. These diagnostic capabilities will support experimental studies of negative triangularity plasmas, electron-scale turbulence, and transport processes in Taiwan's first spherical tokamak, while establishing a flexible diagnostic platform for future expansion of the FIRST research program.
P05 張元耀 成功大學電漿所
Development of a Method for Evaluating Electron Temperature from Electron Cyclotron Emission Spectra in Optically Thin Magnetized Plasmas
Yuan-Yao, Chang, E.Kawamori
Electron cyclotron emission (ECE) is widely used for electron temperature measurements in optically thick plasmas, while its application to optically thin plasmas remains challenging. In this study, we propose a calibration method for estimating the electron temperature in optically thin plasmas using the intensity ratio of ECE harmonics.
Based on the Schott–Trubnikov formula [1], theoretical calculations show a one-to-one relationship between the electron temperature and the intensity ratio of the second and third harmonics. The ratio is also relatively insensitive to variations in magnetic field and electron density in the low-temperature regime.
The proposed method was experimentally investigated using the Magnetized Plasma eXperiment (MPX) at National Cheng Kung University. The second- and third-harmonic ECE intensities were measured using an ECE radiometer, while a Langmuir probe provided an independent electron temperature reference. A receiving lens was used to improve the collection of the ECE signal.
This harmonic-ratio method provides a potential approach for electron temperature measurements in optically thin plasmas and may be applied to Taiwan’s first spherical tokamak under the FIRST project.
[1] I.H. Hutchinson and K. Kato, Nucl. Fusion, 26, 179 (1986).
P06 王玄同 成功大學關鍵材料學程
W/B Multilayer as a Potential Plasma-Facing Material for Suppressing Helium-Induced Damage
Xuan-Tong Wang, E.Kawamori
This study focuses on plasma-facing materials (PFMs) for fusion reactors, which are exposed to extreme heat loads, plasma particle bombardment, and neutron irradiation. Tungsten (W) is considered one of the leading PFM candidates because of its high melting point, low sputtering yield, and relatively low tritium retention. However, high-flux helium plasma can cause He bubble formation and eventually lead to W fuzz, resulting in surface degradation, material erosion, reduced material lifetime, and possible W impurity contamination of the plasma. Therefore, this study proposes a W/B multilayer structure as a potential strategy to suppress or delay helium-induced damage through multilayer interfaces and the structural complexity of the W–B system, and to explore its potential for future fusion PFM applications.
P07 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、張滋芳、江致宇、黃昭瑜、蔡勝丞、顏子恩、鄭鈺融
太空中主要的組成成分是電漿，是物質的第四態。太空環境因為受到太陽的影響有著11年極大值和極小值的週期循環，這些變化都時時刻刻影響著太空天氣。人類透過打造各式儀器搭載人照衛星進行長時間的監控，收集著帶電粒子的各種物理參數，而資料的正確性就成為儀器升空前最重要的校正工作。為此，我們於真空實驗室平台建置可調式離子源，透過參數設定獨立控制離子種類、動能與束流強度，以此標準化來源對待測儀器進行校正與物理數據轉換，量測其在不同入射能量下的響應，並以SIMION模擬比對量測結果，完成整體驗證。
P08 許毅杰 成功大學電漿所
Design and Characterization of High-Performance Semiconductor Detectors for Space Particle measurement
I-CHIEH HSU, Tzu-Fang Chang, Chih-Yu Chiang, Tzu-En Yen, Yung-An Chuang, Kuan-Ting Chen, Po-Tsung Hsieh, Chih-Jeng Huang, Yi-Cheng Liu
The space environment contains particles with a diverse range of energy levels and electrical properties. To elucidate the distribution of these particles in space, we have developed a set of semiconductor detectors designed for measuring particles across the low- to medium-energy spectrum. The objective of this study is to develop a laboratory-fabricated silicon solid-state detector (SSD) for the measurement of various charged particles. Our primary material for the SSD is a high-purity n-type 100 silicon substrate, which features an effective detection area of approximately 9 mm2. Utilizing an electrostatic field generated by a high-voltage deflector, particles with differing electrical characteristics can be effectively separated and directed to designated locations on the SSD. This capability allows the SSD to assess the energy distribution of electrons, ions, and neutral particles from about 1 keV to 200 keV.
The developed SSD exhibits remarkably low leakage current, enabling the measurement of the current from incident particles across a bias voltage range of 1 to 100 V. Furthermore, the leakage current serves as a critical parameter for evaluating the background noise of the detector. In this study, we will present the basic electrical test results of the detector, supplemented by experimental data from plasma source measurements conducted in a vacuum chamber.
Keywords : semiconductor, detector, electrons, ions, neutral particles
P09 鄭鈺融 成功大學電漿所
Utilizing FPGA to carry out the all-sky electrostatic analyzer system functions
Yu-Rong Cheng, Tzu-Fang Chang*, Chih-Yu Chiang, Tzu-En Yen, Sheng-Cheng TSAI, Zhao-Yu Huang, Chien-Hui Chan, Pei-Ying Kuo, Tsung-Wei Chang, Yung-An Chuang, Yung-Tsung Cheng, Shiuan-Hal Shiu, Shu-Chun Huang, Cheng-Lin Tsai, Sin-Fa Lin
This study introduces the use of FPGA to carry out the system functions of the all-sky electrostatic analyzer under limited constraints. The design goal of the instrument system function is to achieve the predetermined scientific goals under the payload limit of the average power consumption being less than 2 W. The operation mode of the instrument is divided into two modes: survival mode and working mode. The working mode cycles through four states: idle state, health data acquisition state, scientific data acquisition state, and data transmission state. In the scientific data acquisition state, we achieve the set scientific objectives by dividing the particle entrance into 8 horizontal directions and splitting the 90° particle incident angle into 6 groups. Simultaneously, 16 energy levels are generated under FPGA control, allowing for the collection of electron energy spectra data from a 2π steradian space.
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, or 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. We will present the design architecture diagram of the FPGA as well as the software flowchart of the MCU within the FPGA. By integrating the FPGA with the MCU, we can effectively control various aspects of the instrument under different states. Finally, under the 2W power limit, we successfully collect particles and analyze their energy and directionality.
P10 Kaichi Iida Graduate School of Engineering, Osaka University
Machine-Learning Reconstruction of Plasma Electric and Magnetic Fields from Carbon-Ion Track Data
Kaichi Iida, Chun-Sung Jao, Yen-Chen Chen, Fuka Nikaido, Chiung-Yin Chang, Yao-Li Liu, Hayato Kusano, Kentaro Sakai, Yamato Esaki, Tsuyoshi Takami, Akira Mizuta, Naofumi Ohnishi, Yasuhiro Kuramitsu
Understanding electric and magnetic field structures is essential for clarifying the formation and evolution of astrophysical plasmas. However, astronomical observations rarely provide simultaneous information on both large-scale plasma structures and local fields. Laboratory astrophysics offers an alternative approach, and our group has used high-power lasers to investigate space and astrophysical plasma phenomena under controlled conditions [1]. To this end, ion radiography is widely used to diagnose electric and magnetic fields in laser-produced high-energydensity plasmas. CR-39 detectors record ion etch pits that provide information on impact position, energy, and incident angle. When combined with stacked detectors and machine learning, these measurements can also be used to estimate the three-dimensional velocity vectors of individual ions [2–4]. Such particle-resolved information is useful for separating electric- and magnetic-field effects. Reconstructing electromagnetic fields directly from many ion trajectories is a complex inverse problem, motivating the use of machine-learning methods. Neural networks have been used to infer electric and magnetic fields under simplified ion-energy conditions [5] and spatially varying
two-dimensional electric fields have also been reconstructed from simulated proton trajectories [6]. In this work, we focus on carbon ions generated using large-area suspended graphene targets [7,8]. Carbon ions produce larger etch pits than protons and are typically recorded at lower track densities, facilitating pit-shape and trajectory analysis. A key challenge is that CR-39 does not directly determine the charge state of each carbon ion. Because ion deflection depends on charge, this uncertainty must be included in field reconstruction. We therefore developed a machinelearning model that uses the two-dimensional detector position and three-dimensional velocity of each ion to simultaneously estimate its charge state and reconstruct the three components of the electric and magnetic fields. Here we present our current progress toward the simultaneous estimation of ion charge states and reconstruction of electric and magnetic fields.
References
[1] H. Takabe and Y. Kuramitsu, High Power Laser Science and Engineering 9, e49 (2021).
[2] T. Minami et al., Physics of Plasmas 32, 073108 (2025).
[3] Y. Kuramitsu et al., Phys. Plasmas 31, 053108 (2024).
[4] T. Taguchi et al., Rev. Sci. Instrum. 95, 033301 (2024).
[5] C.-S. Jao et al., AIP Advances 14, 025037 (2024).
[6] A. Mizuta et al., Contrib. Plasma Phys., e70019 (2025).
[7] N. Khasanah et al., High Power Laser Science and Engineering 5, e18 (2017).
[8] Y. Kuramitsu et al., Scientific Reports 12, 2346 (2022).
P11 謝侑庭 成功大學電漿所
Study of Tokamak start-up using electron injections
Yu-Ting, Hsieh
Nuclear fusion releases an enormous amount of energy and is considered a potential energy source for the future. The Tokamak, which has a doughnut-like shape, is one of the main approaches to achieving fusion power generation. It uses magnetic fields to confine hot plasma so the fusion reaction can occur. Generating plasma in a vacuum chamber is the first step in creating Tokamak plasma, known as the Tokamak start-up phase. One possible approach involves avalanche breakdown along the magnetic field lines. In this work, we injects electrons into the system initiate the avalanche breakdown. Electrons emitted by a heated tungsten filament will be used. To increase the number of collisions between the background gas molecules and the accelerated electrons, the vertical field (Bz) needs to be zero at some locations in thechamber, which is called the null-field point. When electrons are injected along the magnetic field line, they undergo drift motion. We simulated the electron trajectories to find the best location to inject electrons so that electrons drifts into the null-field region, leading to a higher probability of electron impact ionization. The locations is where the electron gun will be located. This concept will be implemented on the mini-Tokamak currently being developed at NCKU. The mini-Tokamak has two sets of PFCs. One set of PFCs have a radius of 200 mm, located at z = ±100 mm. The other set consists of coils with a radius of 100 mm, located at z = ±150 mm. A electron gun using a tungsten filament in a Wehnelt cylinder will be used. The simulated null-field condition, the optimized location for the electron gun, and the design of the electron gun will be shown.
P12 Zhi-Han Ke 成功大學電漿所
Magnetic flux diagnostics and reconstruction for the FIRST tokamak
Zhi-Han Ke
Magnetic field measurement is crucial in tokamak devices, as it provides key parameters for reconstructing magnetic flux surfaces and understanding plasma behavior. This study uses flux loops to measure magnetic flux across defined planes, leveraging their ability to cover wide areas and reduce local disturbance effects, while complementing other diagnostic tools. We developed flux loops tailored for a mini-tokamak and tested them with a pseudo plasma current; the results matched theoretical predictions, confirming that flux loops are effective and reliable instruments for magnetic flux measurement. Finally, a magnetic flux reconstruction method is introduced at the end.
P13 Keng-Yu Lin 成功大學電漿所
Development of 3D B-dot probes for measuring magnetic fields in a Tokamak
Keng-Yu Lin
Nuclear fusion has become a popular topic in the field of high temperature plasma in recent years. Magnetic confinement fusion (MCF) is one of the approaches to achieve fusion, where the high-temperature plasma is confined using magnetic fields and is continuously being heated until fusion reactions occur. Taiwan is currently building a MCF experimental device named Formosa Integrated Research Spherical Tokamak (FIRST). The magnetic field is generated by multiple sets of coils and is also influenced by the magnetic fields produced by the plasma current. Therefore, measuring the magnetic field is a crucial for MCF research. This work focuses on point magnetic field measurement using a 3D B-dot probe. The basic composition of the 3D B-dot probe is a set of conductive coils. When a time-varying magnetic field passes through the coil, it induces a voltage across the coil. Then, the induced voltage from the coil is integrated so that the magnetic field can be obtained by measuring this induced electromotive force. By using three sets of coils orthogonal to each other, both the direction and the amplitude of the magnetic field is retrieved. The 3D B-dot probe applied to FIRST has two layers of coils with a total of 36 turns and a cross section of 10mm by 10mm. An enameled wire with a diameter of 0.21mm is used and soldered to an SMA connector to output the signal. A three-axis Helmholtz-coil system is constructed to generate calibration magnetic fields with controllable amplitudes and directions. The 3D B-dot probe was calibrated using this system. The 3D B-dot probe and the calibration factors are introduced.
P14 Lin Yu-Chi 成功大學電漿所
Manufacturing poloidal field coil for mini-tokamak
Che-Men Chu, Jean Nelson, Bing-Huang He, Yu-Ting Hsieh, Zhi-Han Ke, Keng-Yu Lin, Yung-Wei Pi, Wei-Fong Shan, Po-Yu Chang
This project is to build the poloidal-field coils that will be installed in the tokamak system developed in our lab. By using this device, we can study plasma behavior in a Tokamak. Tokamak mainly consists of three types of coils: toroidal-field coils(TFC), poloidal-field coils(PFC) and a central solenoid(CS). Plasma is confined mainly by toroidal magnetic field generated by TFCs. Poloidal-field coils are used to control the shape and the position of plasma boundary. When central solenoid induces plasma current inside plasma, the shape, such as a D shape, and the location of the plasma is controlled by the Lorentz force generated by the interaction between plasma current and the poloidal-field generated by the PFCs. In this project, we feature two sets of the PFCs( two of each). The first set, driven by a total current of 2.25KA has a diameter of 20cm locates at ±15cm from the equatorial plane. The second set, driven by a total current of 4.3KA, has a diameter of 40 cm locates at ±10cm from the equatorial plane. To hold PFCs, 3D-printed frames are used. The expected major and minor radius of the tokamak are 8.5cm and 5.5cm, respectively. We will show our design of the PFCs and how they work in our system.
P15 謝立揚 成功大學電漿所
Development of photodiode for detecting self-emission of a hybrid x-pinch
謝立揚
With the rapid development of semiconductor fabrication processes and the extreme-ultraviolet (EUV) light source technologies in recent years, there is an increasing demand for high-sensitivity photodetectors. Therefore, we are developing a photodiode to detect the EUV light, in particular but not limited to the self-emission from a hybrid-x pinch. The hybrid X-pinch, as a high-energy-density plasma generation device, can release intense X-rays and EUV radiation within an extremely short time. The device consists of two conical electrodes with a 1 mm gap between the electrodes connected by a fine tin (Sn) wire with a radius of 1mm. When the hybrid x-pinch is driven by a pulsed current of~100kA with a rise time of approximately 1.6 μs, the current flowing through the wire generates magnetic field, and the resulting Lorentz force (J×B force) produces a strong compression effect. The compression happens so fast such that the compression is adiabatic. Through adiabatic compression, the plasma temperature rapidly increases, and emits intense X-ray and EUV. In this study, a photodiode is used to detect radiation in the EUV and soft X-ray regions. With optical filters employed to select specific wavelength bands, rough emitted spectrum can be obtained. The photodiode detection circuit and the filter system is being designed and will be presented.
P16 Bing Huang He 成功大學電漿所
Development of the controlling System for Taiwan's first Tokamak, Formosa Integrated Research Spherical Tokamak (FIRST)
Bing Huang He, Jean Nelson, and Po-Yu Chang
We are developing a controlling system of the current drivers of coils for FIRST, the first Tokamak under construction in Taiwan. The controlling system includes two parts: (1) the pneumatic-control relay system for controlling the charging, energy dumping, and safety. The pneumatic-control relay system is designed to limit the experimental operation time and safely interrupt output current if the switching system in the current driver is damaged by electromagnetic pulses (EMPs). Optical communication between relays and controlling program is used so that the system is EMP free. (2) an Internet of Things (IoT) system to track the charging state of the supercapacitors used in the current drivers in real time. It is to monitor the charging status and post-shot status of the supercapacitors in each current driver. It not only prevents overcharging but also maintains the instruments health. To do so, we made a Round-Robin scheduling program to monitor the status of all supercapacitors in LabVIEW. The controlling system is presented.
P17 Kuan-Chun Lee 成功大學電漿所
Development of an Time-Resolved Ultraviolet (UV) Imaging system and Extreme Ultraviolet (EUV) spectrometer for diagnose the EUV light source using Discharge-Produced Plasma (DPP)
Kuan-Chun Lee, Li-Yang Hsieh, Shu-Wei Kao, Che-Yu Liu, Cheng-Ju Tsai, Po-Yu Chang
We are developing an ICCD camera and a spectrometer to investigate emission from DPP, a potential source of EUV light for lithography. EUV lithography is a leading technology for next-generation semiconductor manufacturing, and DPP offers higher EUV generation efficiency than the currently used laser-produced plasma (LPP). In particular but not limited, a hybrid x pinch is used to generate the EUV light. Analyzing plasma emissions is therefore essential for understanding its performance. In this work, the ICCD camera system is utilized to capture time-resolved UV emission, providing critical insight into plasma implosion dynamics and structural evolution. In addition, a spectrometer system, which is being developed, will be used to quantitatively study the EUV spectral characteristics. The setup design, UV images of an imploded hybrid X-pinch will be presented.
P18 Po-Hsin Tseng 成功大學電漿所
Construction and Simulation of Carborane-Filled Composite Foam Targets for Laser-Driven pB Fusion
Po-Hsin Tseng, Che-Men Chu, Chun-Sung Jao, and Yao-Li Liu
In laser-driven proton-boron fusion, efficient laser absorption is hindered by conventional solid targets reflecting lasers. To address this, we propose a novel composite foam target using 3D Particle-in-Cell (PIC) simulations to enhance volumetric heating and alpha-particle yield.
Overcoming fabrication limits, Carborane powder is embedded within a Voronoi-generated carbon skeleton. This porous design minimizes inter-particle spacing, enabling deep laser penetration and intense volumetric heating.
Simulations demonstrate rapid proton acceleration to ~90 MeV, successfully inducing pB fusion. At just 178 fs, 1.66×10⁸ alpha particles are generated (peaking below 2 MeV). This composite foam target offers a highly promising approach to significantly enhance laser fusion efficiency.
P19 Zi-Xiang Liao 成功大學電漿所
Proton acceleration via high-power laser interactions with porous foam targets
Zi-Xiang Liao, Yao-Li Liu
Three-dimensional particle-in-cell simulations were used to investigate laser-driven proton acceleration in porous carbon–hydrogen foam targets. The pore size was varied while the laser focal spot was fixed at 2.64 μm. The maximum proton energy showed a non-monotonic dependence on the normalized pore size, with the optimum case at dp/Df = 0.25. For dp = 0.6 μm, the proton energy reached approximately 185 MeV, 54% higher than that from a uniform target with the same average electron density. Field and phase-space analyses reveal a two-stage mechanism: cavity-assisted pre-acceleration inside the target, followed by additional rear-surface sheath acceleration. These results show that properly matched porous structures can enhance proton energy by improving laser penetration and strengthening longitudinal accelerating fields.