Article
Engineering, Electrical & Electronic
Jie Wu, Xianlong Lu, Wei Wang, Junjie Han, Guanghui Xu, Zhixiang Huang
Summary: This article presents a low-profile compact array antenna with polarization-agile and frequency-tailored capabilities using digital-controllable radiation beams. The antenna can achieve different radiation beams with various linear polarizations and can alter its frequency based on capacitance values. The simulation and experimental results demonstrate the characteristics of polarization agility and beam controllability.
IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION
(2022)
Article
Instruments & Instrumentation
Liang Zhao, Jian-Cang Su, Rui Li, Bo Zeng, Jie Cheng, Xiu-Dong Xu, Wei Shang
Summary: A compact multi-wire-layered secondary winding for the Tesla transformer was proposed to extend the lifetime of the winding. By replacing the wire material and improving the local structure, the lifetime of the winding was significantly prolonged.
REVIEW OF SCIENTIFIC INSTRUMENTS
(2022)
Article
Multidisciplinary Sciences
Han Liu, Changhao Qin, Georgios Papangelakis, Meng Lon Iu, Amr S. Helmy
Summary: Researchers have developed a quantum-inspired LiDAR prototype based on classical time-frequency correlation, which utilizes high-power classical sources to achieve noise rejection advantage and high sensitivity to single photon signals. The proposed LiDAR receiver also shows potential for improved performance in quantum information applications.
NATURE COMMUNICATIONS
(2023)
Article
Instruments & Instrumentation
Daniel Senda, Haley Strong, Dustin Hines, Rochelle Hines, R. Jacob Baker
Summary: This paper describes an IGBT pulse generator used for in vivo laboratory experiments on small animals, based on an IGBT that can switch 700 A of current for 1 ms and has a DC breakdown voltage of 1200 V. The output pulse duration is controlled by an input trigger pulse, and the voltage amplitude is determined by an external high-voltage power supply and a capacitor bank. The design allows for control and adjustment of voltage amplitude, duration of voltage application, and number of voltage pulses applied, providing a wide range of experimental options.
REVIEW OF SCIENTIFIC INSTRUMENTS
(2021)
Article
Instruments & Instrumentation
Min Jiang, Si-Bin Lu, Yang Li, Chuan Sun, Zhan-Wei Yao, Shao-Kang Li, Hong-Hui Chen, Xiao-Li Chen, Ze-Xi Lu, Yin-Fei Mao, Run-Bing Li, Jin Wang, Ming-Sheng Zhan
Summary: This study developed a compact RF generator for controlling lasers and manipulating atoms, achieving fast switching and sweeping of the frequencies and amplitudes of atomic-interference pulse sequences. By pre-loading the parameters to registers, the need for data transfer is eliminated, significantly reducing the frequency-switching time. The generator demonstrated good performance in a cold-atom-interferometer gyroscope.
REVIEW OF SCIENTIFIC INSTRUMENTS
(2023)
Article
Physics, Fluids & Plasmas
Su-Mi Park, Woo-Cheol Jeong, Yun-Soo Gang, Hong-Je Ryoo
Summary: In this study, a high-voltage switch composed of a series stack of 12 semiconductor switches and a simple and low-cost gate drive circuit for the series stacked switch were designed. The proposed design can be applied to a low-power solid-state pulsed power modulator (SSPPM) without needing auxiliary circuits for the synchronized and isolated gate signal. The high-voltage switch with the IGBT-stack-based configuration was also verified to have compact dimensions of 10 x 10 cm.
IEEE TRANSACTIONS ON PLASMA SCIENCE
(2023)
Article
Automation & Control Systems
Wenjie Qiu, Jian Zhang, Yongkang Luo, Xiaotao Han
Summary: This article proposes a dual-mode ultrasonic measurement system that enables precise acoustic measurements in high magnetic fields and low temperatures. The system features fast excitations, a wide dynamic range, and real-time precise analysis, making it suitable for various physics experiments and industrial applications.
IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS
(2023)
Article
Computer Science, Information Systems
Jaime Carine, Santiago A. Gomez, Giannini F. Obregon, Esteban S. Gomez, Miguel Figueroa, Gustavo Lima, Guilherme B. Xavier
Summary: The study presents an electronic coincidence detection circuit for quantum photonic applications with a 500 ps narrow coincidence window achieved through optimizations on a readily-available FPGA. The high-resolution visualization allowed for the certification of polarized entangled photons and a violation of the CHSH Bell inequality by more than 338 standard deviations. The results demonstrate the applicability of the electronic design in the field of quantum information.
Article
Computer Science, Information Systems
Riccardo Della Sala, Giuseppe Scotti
Summary: Physical Unclonable Functions (PUFs) and True Random Number Generators (TRNGs) are both crucial for generating and securing cryptographic keys in the Privacy Preserving Mutual Authentication (PPMA) protocol used in IoT Applications. This paper presents a re-configurable design that integrates PUF and TRNG on an FPGA platform, exhibiting performances in line with the state of the art. Extensive measurements and comparisons demonstrate that the proposed solution provides the best trade-off among PUF and TRNG performance, offering the most compact PUF and highest throughput TRNG.
Article
Engineering, Electrical & Electronic
Riccardo Della Sala, Davide Bellizia, Giuseppe Scotti
Summary: This paper presents a novel and ultra-compact architecture for a True Random Number Generator (TRNG) and its implementation on an FPGA. The proposed Latched Ring Oscillator (LRO) TRNG combines meta-stability and accumulated jitter as entropy sources, resulting in excellent unpredictability and randomness. The implementation on Xilinx Spartan-6 devices has been extensively validated and shows high performance even under varying supply voltage and temperature. Comparisons with existing TRNGs demonstrate that the proposed LRO-TRNG outperforms most in terms of throughput-to-resource usage ratio.
IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS II-EXPRESS BRIEFS
(2022)
Article
Instruments & Instrumentation
Junna Li, Yongliang Wang, Shi He, Xuliang Chen, Aici Qiu
Summary: This study investigates the effects of circuit and structural parameters on the performance of pulse generators, and proposes a solution to the technological dilemma between high voltage and low inductance. The experimental results demonstrate that by controlling the inductance and spark gap, pulse voltages with sub-nanosecond rise times can be obtained on a 50-ohm transmission line.
REVIEW OF SCIENTIFIC INSTRUMENTS
(2022)
Article
Engineering, Electrical & Electronic
Mohamad Esmaeil Iranian, Meisam Mohseni, Saman Aghili, Ali Parizad, Hamid Reza Baghaee, Josep M. Guerrero
Summary: This article presents a high-performance hardware-in-the-loop (HIL) system designed to assist in developing and testing power electronics control boards. By using real-time models to simulate electrical and mechanical components, the effectiveness of the system for HIL testing is demonstrated.
IEEE JOURNAL OF EMERGING AND SELECTED TOPICS IN POWER ELECTRONICS
(2022)
Article
Instruments & Instrumentation
Zeyang Chen, Xiaohan Wang, Ziwen Zhou, Ramiro Moro, Lei Ma
Summary: This article introduces a new design of a high precision and low-jitter digital delay generator based on an FPGA, which achieves delay through a combination of coarse delay and fine delay, with the characteristics of precise time control and minimal uncertainty.
REVIEW OF SCIENTIFIC INSTRUMENTS
(2021)
Article
Instruments & Instrumentation
Haoran Zhang, Ting Shu, Zhiqiang Li, Zicheng Zhang, Wei Li, Da Li
Summary: This paper introduces a compact PFN (pulse forming network)-Marx generator based on mica capacitors for generating intense electron beams for high-power microwave generation. The key components of the generator include a PFN-Marx, a trigger source, a multi-stage gas switch, and a load.
REVIEW OF SCIENTIFIC INSTRUMENTS
(2021)
Article
Computer Science, Information Systems
Yangpingqing Hu, Yuqiu Jiang, Weizhong Wang
Summary: Physical unclonable functions (PUFs) are a powerful and secure root source for identification and authentication applications. They protect FPGA-based systems from IP thefts and cloning by generating random but device-specific bitstrings. However, the challenge lies in avoiding systematic bias between nominally matched delays in competing paths.
Article
Instruments & Instrumentation
N. Ohmae, H. Katori
REVIEW OF SCIENTIFIC INSTRUMENTS
(2019)
Article
Physics, Multidisciplinary
A. Yamaguchi, M. S. Safronova, K. Gibble, H. Katori
PHYSICAL REVIEW LETTERS
(2019)
Article
Education, Scientific Disciplines
Thaned Pruttivarasin
EUROPEAN JOURNAL OF PHYSICS
(2020)
Article
Optics
Tomoya Akatsuka, Takashi Goh, Hiromitsu Imai, Katsuya Oguri, Atsushi Ishizawa, Ichiro Ushijima, Noriaki Ohmae, Masao Takamoto, Hidetoshi Katori, Toshikazu Hashimoto, Hideki Gotoh, Tetsuomi Sogawa
Article
Optics
Masao Takamoto, Ichiro Ushijima, Noriaki Ohmae, Toshihiro Yahagi, Kensuke Kokado, Hisaaki Shinkai, Hidetoshi Katori
Article
Optics
Noriaki Ohmae, Filippo Bregolin, Nils Nemitz, Hidetoshi Katori
Article
Physics, Applied
Hidetoshi Katori
Summary: The proposal suggests conducting longitudinal Ramsey spectroscopy of atoms in a moving optical lattice by using spatially separated magnetic fields to open the forbidden 1S0-3P0 transition.
APPLIED PHYSICS EXPRESS
(2021)
Article
Geochemistry & Geophysics
Yoshiyuki Tanaka, Hidetoshi Katori
Summary: The introduction of optical clocks improved the accuracy of modern cesium clocks and enabled frequency comparison with a fractional uncertainty of 10^18. In Europe, chronometric leveling has been extensively used to unify height reference systems, offering new opportunities in seismology and volcanology. The superb stability of optical lattice clocks may be best utilized for monitoring crustal deformations in the future.
JOURNAL OF GEODESY
(2021)
Article
Physics, Applied
M. Takamoto, Y. Tanaka, H. Katori
Summary: The stability and accuracy of optical atomic clocks have been greatly enhanced, expanding their applications in frequency metrology, fundamental physics, and geodesy. In particular, the excellent stability of optical lattice clocks has opened up new possibilities for time leveling, but the challenge of developing a transportable system for field use remains.
APPLIED PHYSICS LETTERS
(2022)
Article
Physics, Applied
Ryoto Takeuchi, Hayaki Chiba, Shoichi Okaba, Masao Takamoto, Shigenori Tsuji, Hidetoshi Katori
Summary: We have demonstrated the continuous outcoupling of ultracold Sr-88 atoms using a moving optical lattice. By optically pumping the atoms to the 5s5p P-3(0) state, we outcouple the atoms by a moving optical lattice. Such a continuous atomic source enables superradiant lasers and the zero-dead-time operation of atom interferometers and optical lattice clocks.
APPLIED PHYSICS EXPRESS
(2023)
Article
Optics
Tomoya Akatsuka, Koji Hashiguchi, Tadahiro Takahashi, Noriaki Ohmae, Masao Takamoto, Hidetoshi Katori
Summary: This study reports three-stage laser cooling of Sr atoms, achieving cooling of Sr-87 atoms and one dimensional polarization gradient cooling of Sr-88 atoms. The Sr-87 atoms were precoolied in a magneto-optical trap operated on multiple transitions, while the Sr-88 atoms were cooled down to 0.22(18) µK using a specific transition. The research also discusses the potential for continuous generation of ultracold Sr atoms combined with a state transfer technique.
Article
Optics
N. Kimura, R. Kodama, K. Suzuki, S. Oishi, M. Wada, K. Okada, N. Ohmae, H. Katori, N. Nakamura
Article
Physics, Multidisciplinary
Shoichi Okaba, Deshui Yu, Luca Vincetti, Fetah Benabid, Hidetoshi Katori
COMMUNICATIONS PHYSICS
(2019)
Article
Optics
Koji Hashiguchi, Tomoya Akatsuka, Noriaki Ohmae, Masao Takamoto, Hidetoshi Katori
Article
Optics
Nils Nemitz, Asbjorn Arvad Jorgensen, Ryotatsu Yanagimoto, Filippo Bregolin, Hidetoshi Katori