{"title":"A radio frequency emitter design for the low-frequency regime in atomic experiments.","authors":"Yudong Wei, Zhongshu Hu, Yajing Guo, Zhentian Qian, Shengjie Jin, Xuzong Chen, Xiong-Jun Liu","doi":"10.1063/5.0265742","DOIUrl":"https://doi.org/10.1063/5.0265742","url":null,"abstract":"<p><p>Radio frequency (RF) control is a key technique in cold atom experiments. We present a compact and efficient RF circuit based on a capacitive transformer network, where a low-frequency coil operating up to 30 MHz serves as both an intrinsic inductor and a power-sharing element. The design enables high current delivery and flexible impedance matching across a wide frequency range. We integrate both broadband and narrowband RF networks into a unified configuration that overcomes the geometric constraints imposed by the metallic chamber. In evaporative cooling, the broadband network allows a reduction in the applied RF input power from 14.7 dBW to -3.5 dBW, owing to its non-zero coil current even at ultra-low frequencies. This feature enables the Bose-Fermi mixture to be cooled below 10 μK. In a Landau-Zener protocol, the coil driven by the narrowband network transfers 80% of rubidium atoms from |F = 2, mF = 2⟩ to |2, -2⟩ in 1 millisecond, achieving a Rabi frequency of ∼9 kHz at an input power of 0.1 dBW.</p>","PeriodicalId":21111,"journal":{"name":"Review of Scientific Instruments","volume":"96 9","pages":""},"PeriodicalIF":1.7,"publicationDate":"2025-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145030555","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"A single-nanoprobe-integrated multi-modal microscope (SNIM).","authors":"Yang Xu, Chen Zhang, Yunze Zhou, Jiandong Feng","doi":"10.1063/5.0285663","DOIUrl":"10.1063/5.0285663","url":null,"abstract":"<p><p>Nanodiamonds hosting nitrogen-vacancy centers, as quantum sensors, have been explored for intracellular multi-physics field measurements. However, the lack of active control of the nanodiamond inside the cell hinders the intracellular targeted sensing. We develop a single nanoprobe integrated multi-modal microscope based on our recently proposed manipulable single nanodiamond (MSN) approach, capable of active manipulation of the nanoprobe, live cell culture, in situ observation, and multi-physical field measurement. This probe takes advantage of the good biocompatibility and high manipulation precision of nanopipettes, and the probe module benefits from high stability and accuracy, as well as transmitting electric signals and optical signals into the MSN probe for local field modulation. By adopting a multi-stack sample cell equipped with a vibration-free thermostat, our setup allows long-term live cell incubation and observation. We also demonstrate real-time in situ intracellular multi-physics field measurement. Our setup integrates manipulation and measurement and provides optimal conditions for live cell experiments, which may serve as a powerful tool to study the complicated intracellular dynamics with quantum sensing.</p>","PeriodicalId":21111,"journal":{"name":"Review of Scientific Instruments","volume":"96 9","pages":""},"PeriodicalIF":1.7,"publicationDate":"2025-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144966757","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Hang Hui, Xiaolong Hao, Fan Bai, Yunxia Chen, Yangtao Hu
{"title":"Implementation of an acoustic-logging-data compression algorithm on DSP and FPGA platforms.","authors":"Hang Hui, Xiaolong Hao, Fan Bai, Yunxia Chen, Yangtao Hu","doi":"10.1063/5.0282533","DOIUrl":"https://doi.org/10.1063/5.0282533","url":null,"abstract":"<p><p>Currently, notable difficulties exist regarding the real-time uploading of data and fast logging in remote-detection acoustic logging, which can be mitigated via downhole data compression. This study systematically analyzed a wavelet transform-based data compression method and developed hardware platforms based on a digital signal processor (DSP) and field programmable gate array (FPGA). The wavelet transform-based acoustic-logging-data compression algorithm was executed on both the hardware platforms, and the corresponding decompression algorithm was implemented on the host computer. The performance and applicability of the algorithm were evaluated using actual acoustic logging data. Results indicated that the compression ratio and distortion rate of the single-layer wavelet transform-based data compression algorithm exhibited minimal relation with the two hardware platforms. The compression ratio was ∼50%; the reconstructed full waveform effectively preserved the overall morphology of the original signal; and distortions at individual positions exerted negligible impact on the extraction of the sliding longitudinal wave, sliding transverse wave, and reflected wave in the full-waveform data. The wavelet transform-based data compression algorithm occupied less memory in the FPGA platform for processing 2048-word acoustic logging full-waveform data. The execution time was ∼42 μs, which was substantially less than the millisecond-scale runtime required by the DSP platform. This study provides an idea of data compression at the receiver node in a remote-detection acoustic logging tool, which can reduce the workload of the master controller and improve cable transmission and logging efficiencies, serving as a reference for designing next-generation remote-detection acoustic logging tools.</p>","PeriodicalId":21111,"journal":{"name":"Review of Scientific Instruments","volume":"96 9","pages":""},"PeriodicalIF":1.7,"publicationDate":"2025-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144966776","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"X-ray crystal spectrometer throughput, data treatment, and configuration over the JET DTE2 and DTE3 campaigns.","authors":"A M Patel, N C Hawkes, K-D Zastrow, M O'Mullane","doi":"10.1063/5.0274324","DOIUrl":"https://doi.org/10.1063/5.0274324","url":null,"abstract":"<p><p>The calibration of the JET x-ray spectrometer is presented. The absolute throughput, diffractor focusing, and instrument function of the spectrometer are presented, and the quality of the ion temperature measurement is re-assessed, particularly at the lower end. The addition of a second diffractor enables the simultaneous measurements of the spectra from H- and He-like nickel, which widens the spatial coverage of the core-ion temperature measurements for high-performance plasmas at a fixed Bragg angle range. A calculation of the absolute continua from the spectrum background from the second diffractor is analyzed for different JET plasmas. The spectrometer's narrow bandwidth makes it ideal as an \"x-ray monochromator\" that can sample a single energy channel (or two over the two crystal orders) within the free-free and free-bound x-ray continua. The measurable effect for impurity-seeded plasmas is explored as a means to determine the plasma concentration of the seeding impurities, which has the potential to be a robust method for high performance DT operations in reactor-class machines.</p>","PeriodicalId":21111,"journal":{"name":"Review of Scientific Instruments","volume":"96 9","pages":""},"PeriodicalIF":1.7,"publicationDate":"2025-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145024208","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
D Goulart, A M Sindhwad, H M Jackson, N I Kowitt, K A Dones, P Castaño Basurto, A Dawes, S Jois, S M Lewis, K van Bibber
{"title":"Practical photonic bandgap structures for high frequency axion haloscopes.","authors":"D Goulart, A M Sindhwad, H M Jackson, N I Kowitt, K A Dones, P Castaño Basurto, A Dawes, S Jois, S M Lewis, K van Bibber","doi":"10.1063/5.0265877","DOIUrl":"https://doi.org/10.1063/5.0265877","url":null,"abstract":"<p><p>Current and future searches for dark matter axions, based on their resonant conversion to photons in a magnetic field, span many orders of magnitude. A major impediment to designing resonators at the high end of this range, 5 GHz and above, is the proliferation of TE modes, which overwhelm and hybridize with the TM010 mode to which the axion couples, making the search impossible. We demonstrate that a photonic bandgap structure can be designed that completely suppresses the TE spectrum, even reducing the number of lattice periods to two or one and violating perfect lattice symmetry. This allows tunable resonators to be designed in a convenient, volumetrically efficient circular geometry thus enabling future searches in the post-inflation axion mass range.</p>","PeriodicalId":21111,"journal":{"name":"Review of Scientific Instruments","volume":"96 9","pages":""},"PeriodicalIF":1.7,"publicationDate":"2025-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145016143","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
A Y M Legoupil, R Kirby, E Lamere, R Christianson, O Duke, A K Nguyen, M P Short
{"title":"A cryogenic white light absorption spectroscopy setup with in situ gamma irradiation and thermo-optical annealing for optical fiber radiation-induced attenuation characterization.","authors":"A Y M Legoupil, R Kirby, E Lamere, R Christianson, O Duke, A K Nguyen, M P Short","doi":"10.1063/5.0273589","DOIUrl":"https://doi.org/10.1063/5.0273589","url":null,"abstract":"<p><p>Silica optical fiber sensors offer a fast, distributed measurement solution in various cryogenic and radiation environments, such as magnets for fusion power. Under these conditions, light-absorbing point defects limit lifetime via radiation-induced attenuation (RIA). To support RIA kinetics prediction, we present an in situ, broadband absorption spectroscopy setup combining gamma irradiation with liquid nitrogen cooling. The apparatus enables continuous monitoring of narrowband RIA levels and the use of secondary optical annealing light sources, alongside broadband spectrum measurements to characterize RIA defects through spectrum decomposition. Initial results confirm the inevitable photobleaching effect of the probe light source, which must be accounted for. In addition, we report RIA kinetics during cycles of gamma irradiation at 77 K and isochronal thermal annealing steps from liquid nitrogen to room temperature, showcasing the setup's ability to replicate real fiber operation scenarios. These instruments form an ideal platform to further study the kinetics of RIA coupled with thermal and optical annealing.</p>","PeriodicalId":21111,"journal":{"name":"Review of Scientific Instruments","volume":"96 9","pages":""},"PeriodicalIF":1.7,"publicationDate":"2025-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145125897","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Y Nagashima, K Hanada, H Zushi, H Idei, M Hasegawa, K Nakamura, T Onchi, R Ikezoe, T Ido, T Kinoshita, A Fujisawa, S Kawasaki, T Nagata, S Shimabukuro, T Mutaguchi, K Kono, I Niiya, I Sugiyama, A Higashijima, S Kojima, K Kuroda, A Ejiri, Y Takase, T Shikama, A Kuzmin, K Nagaoka
{"title":"Development of a limiter-like Langmuir probe system for the Q-shu university experiment with steady-state spherical tokamak (QUEST) all-metal device.","authors":"Y Nagashima, K Hanada, H Zushi, H Idei, M Hasegawa, K Nakamura, T Onchi, R Ikezoe, T Ido, T Kinoshita, A Fujisawa, S Kawasaki, T Nagata, S Shimabukuro, T Mutaguchi, K Kono, I Niiya, I Sugiyama, A Higashijima, S Kojima, K Kuroda, A Ejiri, Y Takase, T Shikama, A Kuzmin, K Nagaoka","doi":"10.1063/5.0283183","DOIUrl":"https://doi.org/10.1063/5.0283183","url":null,"abstract":"<p><p>A limiter-like Langmuir probe system was developed to measure scrape-off layer (SOL) plasmas in the Q-shu University Experiment with a steady-state Spherical Tokamak (QUEST) all-metal device. The system is mainly made of metals such as tungsten to keep compatibility with the all-metal conditions under which retention of plasma fueling gases in first walls is controlled. The system also includes built-in water coolant systems to withstand high heat loads originating from high energy electrons excited by radio frequency plasma heating/current drive systems during the fully non-inductive operations. Development of the system enables us to measure scrape-off layer plasmas in the presence of high energy electrons during fully non-inductive steady-state tokamak operations in QUEST. Preliminary experimental results of plasma measurements in QUEST SOL plasmas where high energy particles exist are presented.</p>","PeriodicalId":21111,"journal":{"name":"Review of Scientific Instruments","volume":"96 9","pages":""},"PeriodicalIF":1.7,"publicationDate":"2025-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145076170","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Demonstration and real-time non-destructive diagnosis of a high-flux laser-driven proton bunch.","authors":"Hironao Sakaki, Sadaoki Kojima, Tsuyoshi Suwada, Thanh-Hung Dinh, Hiroshi Tsutui, Yutaka Touchi, Kiyotaka Ohtomo, Haruya Matsumoto, Nobuatsu Aoki, Hikaru Souda, Masayasu Hata, Yoichi Yamamoto, Fuyumi Itou, Masaharu Nishikino, Toshiyuki Shirai, Kiminori Kondo","doi":"10.1063/5.0274838","DOIUrl":"https://doi.org/10.1063/5.0274838","url":null,"abstract":"<p><p>To realize a compact and high-intensity ion beam facility based on laser-driven ion acceleration by Target Normal Sheath Acceleration, we constructed a dedicated beamline capable of transporting and controlling proton beams with kinetic energy of 1.5 MeV. The system consists of a quadrupole triplet electromagnet for spatial focusing and an energy-compressing cavity (ECC) for longitudinal phase rotation, enabling momentum compression. A wall current monitor (WCM), installed 4.2 m downstream of the source, enables real-time, non-destructive bunch diagnostics. Using this setup, a single-bunch proton with a kinetic energy of 1.5 MeV was generated from a 5.0 μm-thick nickel tape target and compressed by phase rotation in the ECC. The time-domain standard deviation of the bunch length, as measured by the WCM, was found to be less than σBunch≃ 0.14 ns (limited by the measurement resolution), and the bunch was transversely focused to a root-mean-square diameter of ∼10 mm at the WCM position, as determined from beam transport simulations. The single-shot irradiation fluence exceeded 5.5 × 107 (protons/cm2)/bunch with an energy spread of 4.6%, corresponding to a peak flux of ∼1017 (protons/cm2)/s. Such a low-energy, sub-nanosecond, high-flux single-bunch proton beam is extremely difficult to achieve with conventional ion accelerator systems. It enables experimental investigation of fundamental material damage processes with high temporal resolution, including early stage defect formation and atomic displacements. This laser-driven ions beam study is expected to significantly advance time-resolved applications requiring sub-nanosecond temporal resolution, particularly in the fields of advanced materials research.</p>","PeriodicalId":21111,"journal":{"name":"Review of Scientific Instruments","volume":"96 9","pages":""},"PeriodicalIF":1.7,"publicationDate":"2025-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145150706","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Namkyung Lee, Seungwon Jung, Baeksan Jang, Sangwook Ha, Joonho Jang
{"title":"Cryogen-free variable-temperature Kelvin probe force microscopy for probing local chemical potential in van der Waals heterostructures.","authors":"Namkyung Lee, Seungwon Jung, Baeksan Jang, Sangwook Ha, Joonho Jang","doi":"10.1063/5.0283225","DOIUrl":"https://doi.org/10.1063/5.0283225","url":null,"abstract":"<p><p>We report the development of a variable-temperature Kelvin probe force microscopy (KPFM) system based on a Gifford-McMahon cryocooler, which enables stable and highly sensitive operation across a broad temperature range. The system integrates a custom-designed phase-locked loop, automatic gain control, and compact passive vibration isolation stages, effectively suppressing mechanical vibrations intrinsic to cryostats. We demonstrate the system's performance using a monolayer graphene (MLG) device encapsulated in hexagonal boron nitride, serving as a benchmark platform to validate spatial resolution and CPD sensitivity. Despite the presence of a dielectric encapsulation layer, our system achieves high CPD sensitivity. Temperature-dependent measurements further confirm the capability to resolve subtle changes in chemical potential near the charge neutrality point, consistent with the known electronic structure of MLG. This work establishes a variable temperature KPFM platform suitable for investigating temperature-dependent quantum electronic phases in van der Waals heterostructures.</p>","PeriodicalId":21111,"journal":{"name":"Review of Scientific Instruments","volume":"96 9","pages":""},"PeriodicalIF":1.7,"publicationDate":"2025-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144966835","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Phillip Imgram, Dinko Atanasov, Michail Athanasakis-Kaklamanakis, Paul Van den Bergh, Tobias Christen, Gerda Neyens, Stefanos Pelonis, Ruben de Groote, Ágota Koszorús
{"title":"A new beamline for resonant excitation of beams with electromagnetic fields and lasers (REBEL) and stopping and trapping of radioactive isotopes for precision experiments (STRIPE).","authors":"Phillip Imgram, Dinko Atanasov, Michail Athanasakis-Kaklamanakis, Paul Van den Bergh, Tobias Christen, Gerda Neyens, Stefanos Pelonis, Ruben de Groote, Ágota Koszorús","doi":"10.1063/5.0287178","DOIUrl":"https://doi.org/10.1063/5.0287178","url":null,"abstract":"<p><p>We present two newly constructed experimental setups-REBEL (Resonant Excitation of Beams with Electromagnetic fields and Lasers) and STRIPE (Stopping and Trapping of Radioactive Isotopes for Precision Experiments)-integrated into a single offline beamline at KU Leuven. REBEL is designed for collinear laser spectroscopy of ion bunches, including isobaric separation with a multi-reflection time-of-flight mass spectrometer, enabling high-sensitivity measurements of mass-selected fast-ion beams. In contrast, STRIPE focuses on the deceleration, trapping, and laser cooling of ions in a segmented linear Paul trap, optimized for long interrogation times and precision spectroscopy. The shared infrastructure features stable high-voltage operation (<10 ppm), modular vacuum sections, and a fast-beam switchyard to route ions to either experiment. Initial results include a mass-resolving power of R ≈ 12 900 in REBEL and successful ion trapping and laser cooling of ions with a kinetic energy of 10 keV in STRIPE, with improved performance achieved using a frequency-modulated cooling laser. This dual-system platform enables the development and benchmarking of advanced spectroscopy and trapping techniques and is compatible with future operation at radioactive ion beam facilities.</p>","PeriodicalId":21111,"journal":{"name":"Review of Scientific Instruments","volume":"96 9","pages":""},"PeriodicalIF":1.7,"publicationDate":"2025-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145001414","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}