Ghassan Shahin, Marie Violay, Adrien Mermod, Kilian Guenin
{"title":"MISTRAL: Triaxial apparatus for extreme chemo-hydro-mechanics and in situ x-ray imaging.","authors":"Ghassan Shahin, Marie Violay, Adrien Mermod, Kilian Guenin","doi":"10.1063/5.0297997","DOIUrl":"https://doi.org/10.1063/5.0297997","url":null,"abstract":"<p><p>Triaxial compression testing is a widely used method for investigating the elastic and inelastic responses of geomaterials. However, in situ characterization of the process leading to failure at both the specimen and grain scales during such experiments, particularly under elevated confining pressures and reactive environments relevant to geological reservoirs and geotechnology, has remained scarce. This limitation has hindered the advancement of a mechanistic understanding of deformation and failure in geomaterials. To address this gap, we developed a novel high-pressure triaxial apparatus, termed MISTRAL. MISTRAL is a miniaturized triaxial device capable of applying confining pressures relevant to reservoir conditions (up to 100 MPa) while allowing deviatoric loading up to 400 MPa. MISTRAL allows the injection of both reactive fluids (pH 5-9) and carbon dioxide (gas and supercritical) under a pressure of up to 100 MPa. The device is uniquely designed to accommodate in situ x-ray imaging through laboratory sources and operando permeability quantification for the real-time investigation of hydraulic, chemical, and deformation reactions at both the sample and grain scales. In this work, we introduce the design and capabilities of MISTRAL, along with results from its deployment in laboratory environments. The executive drawings of MISTRAL are fully provided to enable reproducibility and deployment. An experiment on a standard sandstone material subjected to a confining pressure of 100 MPa demonstrates MISTRAL's capacity to resolve micromechanical responses under reservoir conditions. The findings underscore the utility of the instrument in advancing our understanding of deformation processes in geomaterials, with implications for both natural and engineered systems.</p>","PeriodicalId":21111,"journal":{"name":"Review of Scientific Instruments","volume":"97 5","pages":""},"PeriodicalIF":1.7,"publicationDate":"2026-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147841951","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}
Jamshid Ochilov, Isaac Faith Nahmad, Intekhab Alam, Peter Yip, Suraj Ravindran
{"title":"Supersonic microparticle impact experiments on targets at temperatures approaching 2000 °C.","authors":"Jamshid Ochilov, Isaac Faith Nahmad, Intekhab Alam, Peter Yip, Suraj Ravindran","doi":"10.1063/5.0311052","DOIUrl":"https://doi.org/10.1063/5.0311052","url":null,"abstract":"<p><p>Experiments at extreme strain rates and temperatures are critical for characterizing materials in high-speed applications. In this study, we develop a laser-driven particle impact platform capable of accelerating microparticles to supersonic velocities and impacting targets heated to temperatures approaching 2000 °C. The conventional laser-induced particle impact testing system has been modified to enable high-temperature experiments through the integration of a resistive heating system and the development of a robust launch pad assembly suitable for accelerating particles in high-temperature environments. To eliminate the oxidation of materials at elevated temperatures, an optically accessible portable vacuum chamber has been developed and integrated into the setup. The capabilities of the system are demonstrated through a study of the temperature dependent particle impact cratering behavior of POCO graphite. With this new platform, high-velocity, high-temperature impact experiments can be performed in a controlled environment, supporting the investigation of materials under extreme conditions.</p>","PeriodicalId":21111,"journal":{"name":"Review of Scientific Instruments","volume":"97 5","pages":""},"PeriodicalIF":1.7,"publicationDate":"2026-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147842024","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}
Jared Schroeder, Valentin Steichen, Stefano Livi, Edward Patrick, Gregory Miller, John Turner
{"title":"A molecular beam facility for the calibration of spaceborne neutral mass spectrometers.","authors":"Jared Schroeder, Valentin Steichen, Stefano Livi, Edward Patrick, Gregory Miller, John Turner","doi":"10.1063/5.0319305","DOIUrl":"https://doi.org/10.1063/5.0319305","url":null,"abstract":"<p><p>A new molecular beam calibration facility, the MOlecular Beam for Instrument Utilization and Simulation (MOBIUS), has been developed to enable realistic, in situ testing and calibration of spaceborne neutral mass spectrometers. The facility is based on a differentially pumped beamline featuring a high-pressure, high-temperature nozzle source and modular diagnostic capabilities. MOBIUS is specifically engineered to reproduce the high-speed, directed neutral particle fluxes encountered by spacecraft in planetary exospheres and upper atmospheres. We demonstrate the system's performance by characterizing supersonic beams generated across multiple gases. When operating with seeded gas mixtures (hydrogen-argon), the facility reliably produces neutral beams in the 3-5 km s-1 range, successfully achieving the high relative velocities required for instruments such as the Strofio mass spectrometer onboard BepiColombo. Furthermore, neutral flux is verified to be on the order of 1015 cm-2 s-1, and the resulting beam profiles are confirmed to be uniform and well-collimated. These results establish MOBIUS as a complete and necessary testbed for accurately characterizing the response of instruments under relevant in-orbit conditions.</p>","PeriodicalId":21111,"journal":{"name":"Review of Scientific Instruments","volume":"97 5","pages":""},"PeriodicalIF":1.7,"publicationDate":"2026-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147820062","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":"Experimental designs on studies of flapping locomotion.","authors":"Zhuang Su, Nicolas Vandenberghe, Jun Zhang","doi":"10.1063/5.0293529","DOIUrl":"https://doi.org/10.1063/5.0293529","url":null,"abstract":"<p><p>Flapping flight and undulating swimming are perhaps the most fascinating biological locomotion means found in nature. To study such fluid-structure interactions in laboratory settings, we introduce mechanical systems that execute reciprocal motions. Model wings or fins are flapped at a desired frequency and amplitude. Perpendicular to actuation, the systems are allowed to move freely, rendering forward swimming or flight. Here, we present two mechanisms that have been used in our research on flap-and-swim locomotion. In the first system, which is designed in a cylindrical water tank, a wing is vertically flapped and its resulting horizontal rotation is regarded as forward flight. The second system operates in a water tunnel; a wing is flapped in an incoming flow but is restricted within a force potential, with which the net thrust or drag can be precisely measured.</p>","PeriodicalId":21111,"journal":{"name":"Review of Scientific Instruments","volume":"97 5","pages":""},"PeriodicalIF":1.7,"publicationDate":"2026-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147820049","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}
X Yu, Y F Shi, Z J Li, Z Wang, Z B Shi, W Chen, M Jiang, Z C Yang, Y H Chen, Z Y Yin, G Y Yu, X L Li, Y L Zhu
{"title":"Optimization of the magnetic difference calibration method on Huan Liu-3 tokamak.","authors":"X Yu, Y F Shi, Z J Li, Z Wang, Z B Shi, W Chen, M Jiang, Z C Yang, Y H Chen, Z Y Yin, G Y Yu, X L Li, Y L Zhu","doi":"10.1063/5.0307778","DOIUrl":"https://doi.org/10.1063/5.0307778","url":null,"abstract":"<p><p>Blackbody in situ calibration is a standard method for Electron Cyclotron Emission (ECE) diagnostics but involves complex in-vessel hardware that poses maintenance challenges. To provide a robust relative calibration strategy, the Magnetic Difference Calibration Method (MDM) was developed and analyzed on the HL-3 (Huan Liu-3) tokamak under ohmic discharge conditions. Unlike methods requiring internal sources, MDM relies on controlled magnetic field differences between similar discharges, eliminating risks associated with hardware degradation. Based on electron temperature (Te) profiles from the Minute Embedded Tokamak Integrated Simulator code and considering HL-3's plasma displacement control capabilities, an optimized MDM approach was proposed. Results indicate high reliability, with ∼98% accuracy on the low-field side. Compared to traditional absolute calibration methods, the MDM offers a hardware-free approach, making it a valuable complementary technique for ECE calibration.</p>","PeriodicalId":21111,"journal":{"name":"Review of Scientific Instruments","volume":"97 5","pages":""},"PeriodicalIF":1.7,"publicationDate":"2026-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147841978","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":"Hyperspectral radiance mapping and chromatic correction for temperature measurement in laser-heated diamond anvil cells.","authors":"Rostislav Hrubiak, Guoyin Shen, Dean Smith, Curtis Kenney-Benson, Maddury Somayazulu, Nenad Velisavljevic","doi":"10.1063/5.0317317","DOIUrl":"https://doi.org/10.1063/5.0317317","url":null,"abstract":"<p><p>In laser-heated diamond anvil cell (DAC) experiments, the effective heated region typically decreases in size with increasing pressure, leading to steeper thermal gradients. Under these conditions, chromatic aberration in the optical path from sample to detector can significantly create bias in spectro-radiometric temperature measurement. We present a radiance-mapping approach using a hyperspectral camera that records 25 spectral channels spanning 605-875 nm at each pixel in a single exposure, providing spatially and spectrally resolved radiance in each frame. This enables chromatic effects to be recorded and corrected in data processing. We developed a procedure for hyperspectral mapping, involving per-camera calibration, crosstalk removal, measured spectral throughput functions, and optional sub-pixel co-registration to minimize chromatic distortion. The calibrated radiance maps are then used to derive temperature maps of the laser-heated hotspots. For smaller heating spots, the radiance mapping approach reveals chromatic shifts that conventional spectro-radiometric methods cannot quantify. Ambient-pressure heating experiments confirm accurate temperature retrieval. At high pressure, application of the hyperspectral system to a platinum-heating experiment at 12 GPa demonstrates stable temperature reconstruction under steep thermal gradients. Beyond mitigating chromatic aberrations, the ability to diagnose optical artifacts separately from emissivity variations during controlled test experiments or in situ suggests a path toward more rigorous spectral emissivity analysis and improved modeling of thermal transport in laser-heated DAC experiments.</p>","PeriodicalId":21111,"journal":{"name":"Review of Scientific Instruments","volume":"97 5","pages":""},"PeriodicalIF":1.7,"publicationDate":"2026-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147841859","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}
M Kendler, A Redl, L Gmainer, M Goldberger, F Vuković, A Niggas, P Roncin, R A Wilhelm
{"title":"A capacitively coupled segmented polyimide core anode for a microchannel plate timing detector.","authors":"M Kendler, A Redl, L Gmainer, M Goldberger, F Vuković, A Niggas, P Roncin, R A Wilhelm","doi":"10.1063/5.0319180","DOIUrl":"https://doi.org/10.1063/5.0319180","url":null,"abstract":"<p><p>We present a novel readout method for microchannel plate (MCP) signals using timing anodes made from flexible polyimide laminates. Our approach is fully compatible with ultrahigh vacuum environments, as required for the majority of MCP applications. Multiple anode segments and signal tracks are patterned onto the laminate using standard printed circuit board techniques, enabling precise impedance matching of the anode circuit to a 50 Ω coaxial transmission line. Copper patches on both sides of the laminate form embedded capacitors, which are part of integrated decoupling circuits that reduce latency and noise compared to traditional external signal readout methods. The high breakdown voltage of polyimide permits the application of several kilovolts across the anode for MCP detector operation modes that require biasing of both the MCP and the anode. We demonstrate that the MCP signals captured by these segmented polyimide anodes follow a Gaussian profile in time and have a duration <1.5 ns full-width-at-half-maximum. Using an optical detector characterization method, we demonstrate a timing resolution of 40 ps root-mean-square for our ∅50 mm MCPs in Chevron configuration across eight distinct anode segments.</p>","PeriodicalId":21111,"journal":{"name":"Review of Scientific Instruments","volume":"97 5","pages":""},"PeriodicalIF":1.7,"publicationDate":"2026-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147820090","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}
X Liu, X P Zhou, W Q Wen, Z K Huang, H B Wang, J Xiao, Y Zou, X Ma
{"title":"A high-temperature superconducting compact Shanghai-Lanzhou electron beam ion trap for precision measurement of highly charged ions.","authors":"X Liu, X P Zhou, W Q Wen, Z K Huang, H B Wang, J Xiao, Y Zou, X Ma","doi":"10.1063/5.0323511","DOIUrl":"https://doi.org/10.1063/5.0323511","url":null,"abstract":"<p><p>We present the design, implementation, and initial performance of the Shanghai-Lanzhou electron beam ion trap (SL-EBIT), a compact electron beam ion trap employing high-temperature superconducting magnets and optimized for high-precision optical spectroscopy of highly charged ions. The system integrates a thermionic electron gun, independently biased drift tubes, and a high-efficiency electron collector within a compact ultrahigh-vacuum configuration, enabling stable operation over a broad range of electron beam energies. The performance of the SL-EBIT is benchmarked through optical spectroscopy of well-established fine-structure transitions, including the 1s22s22pP3/22→P1/22 transition in boron-like Ar13+ and the 1s22s22p5P1/22→P3/22 transition in fluorine-like Ar9+. The measured wavelengths are in good agreement with previously reported high-precision values within the combined experimental uncertainties, validating the wavelength calibration procedure and the spectroscopic performance of the instrument. In addition, the SL-EBIT is designed to support future charge-state-resolved ion extraction and external laser spectroscopy experiments, providing a flexible and versatile platform for precision spectroscopic studies of highly charged ions.</p>","PeriodicalId":21111,"journal":{"name":"Review of Scientific Instruments","volume":"97 5","pages":""},"PeriodicalIF":1.7,"publicationDate":"2026-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147820110","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":"Development of ultra-high efficiency soft x-ray angle-resolved photoemission spectroscopy equipped with deep prior-based denoising method.","authors":"Kohei Yamagami, Yuichi Yokoyama, Yuta Sumiya, Hayaru Shouno, Tetsuro Nakamura, Masaichiro Mizumaki","doi":"10.1063/5.0314932","DOIUrl":"https://doi.org/10.1063/5.0314932","url":null,"abstract":"<p><p>Soft x-ray angle-resolved photoemission spectroscopy (SX-ARPES) is one of the most powerful spectroscopic techniques to visualize the three-dimensional bulk electronic structure in reciprocal lattice space. Compared with ARPES employing low-energy photon sources, the time burden imposed by a lower photoelectron yield, stemming from the photoionization cross-section, has been a persistent technical challenge. To address this challenge, we have developed a noise-reduction system by using the deep prior-based approach and integrated it into the micro-focused SX-ARPES (μSX-ARPES) system at BL25SU in SPring-8. The implemented system effectively eliminates instrumental artifacts, such as grid and spike structures typical of ARPES data acquired using the voltage Fixed mode, within ∼30 s. We demonstrate, through the μSX-ARPES measurements on a single crystal of CeRu2Si2, that data with sufficient statistical accuracy can be obtained in ∼40 s. In addition, we present the potential of high signal-to-noise ratio ARPES measurement, achieving an energy resolution of 51.6 meV at an excitation energy of 708 eV in μSX-ARPES measurements on polycrystalline gold. Our developed system successfully reduces the time burden in SX-ARPES and paves the way for advancements in lower photoelectron yield measurements, such as those requiring higher energy resolution and three-dimensional nonequilibrium measurements.</p>","PeriodicalId":21111,"journal":{"name":"Review of Scientific Instruments","volume":"97 5","pages":""},"PeriodicalIF":1.7,"publicationDate":"2026-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147841890","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}
M Schoenzeit, P L Poole, G E Kemp, B E Blue, D Hinshelwood, S Lees, I Lopez, M May, S J Moon, C Noble, M Parrott, P Porazik, K Widmann, A M Saunders
{"title":"Titanium alloy response sensitivity to variations in spectral reconstructions of National Ignition Facility xenon line-emission x-ray sources.","authors":"M Schoenzeit, P L Poole, G E Kemp, B E Blue, D Hinshelwood, S Lees, I Lopez, M May, S J Moon, C Noble, M Parrott, P Porazik, K Widmann, A M Saunders","doi":"10.1063/5.0305165","DOIUrl":"https://doi.org/10.1063/5.0305165","url":null,"abstract":"<p><p>Thermomechanical shock experiments on the National Ignition Facility (NIF) aim to study high strain rate dynamic material response. In such experiments, the NIF laser is used to generate high fluence x-ray emission sources, which irradiate material samples of interest. Under sufficiently high x-ray energy deposition, thermomechanical impulses are generated in the materials. While it is known that the characteristics of x-ray generated impulses vary as a function of incident x-ray spectra, it remains unclear how spectral assumptions and uncertainties in NIF spectral reconstructions affect our interpretation of impulsive loading. In this paper, we simulate the response of a standard titanium alloy baseline sample to synthetic analytically derived and measured NIF xenon line-emission x-ray sources with a radiation hydrodynamics code. We vary the source spectral characteristics based on different source reconstruction techniques to understand the resulting variation in baseline sample response and compare the simulated response with experimental results. We find that the response is highly sensitive to assumptions made about the spectral contents and that knowledge of spectral uncertainties bounds our understanding of the resulting material response. The results of this effort help to extend our ability to use baseline material samples to extract quantitative properties from x-ray experiments on the NIF.</p>","PeriodicalId":21111,"journal":{"name":"Review of Scientific Instruments","volume":"97 5","pages":""},"PeriodicalIF":1.7,"publicationDate":"2026-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147842010","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}