Review of Scientific Instruments最新文献

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Measurement of radial electron density and temperature profile in the Wendelstein 7-X scrape off layer using the new outboard midplane thermal helium beam diagnostic. 利用新型外壁式中层热氦束诊断仪测量Wendelstein 7-X刮除层的径向电子密度和温度分布。
IF 1.6 4区 工程技术
Review of Scientific Instruments Pub Date : 2026-10-01 DOI: 10.1063/5.0350709
Foisal B T Siddiki, M Krychowiak, O Schmitz, M Vécsei, A Knieps, F Henke, D Gradic, Y Boumendjel, C Killer, A Pandey
{"title":"Measurement of radial electron density and temperature profile in the Wendelstein 7-X scrape off layer using the new outboard midplane thermal helium beam diagnostic.","authors":"Foisal B T Siddiki, M Krychowiak, O Schmitz, M Vécsei, A Knieps, F Henke, D Gradic, Y Boumendjel, C Killer, A Pandey","doi":"10.1063/5.0350709","DOIUrl":"https://doi.org/10.1063/5.0350709","url":null,"abstract":"<p><p>A new helium beam diagnostic has been implemented at the outboard midplane of the stellarator Wendelstein 7-X (W7-X) to measure edge plasma parameters in the scrape-off layer (SOL). The system provides localized measurements of electron density (ne) and temperature (Te) through spectroscopic observation of atomic helium emission lines combined with a collisional radiative model (CRM) with a radial spatial resolution of 4.5 mm. A gaseous beam of neutral helium atoms is injected radially into the plasma, and the resulting line emission is collected using a Schmidt Czerny Turner spectrometer. In this work, we discuss the successful implementation of the diagnostic, including the optical setup, data acquisition, and the analysis approach to obtain the ne(R, t) and Te(R, t) profiles using an advanced CRM. The diagnostic is benchmarked against a colocated alkali beam diagnostic and compared with other edge diagnostics, including the Multipurpose Manipulator, divertor Langmuir probes, and the divertor helium beam. These comparisons show that the midplane helium beam measurements are consistent with the expected edge plasma parameter range. A magnetic field line mapping methodology has also been established to enable cross-diagnostic comparisons in the three-dimensional island SOL geometry of W7-X. First, measurements from recent experimental campaigns demonstrate that the diagnostic can resolve radial ne and Te profiles in the main SOL region, providing a new capability for characterizing edge transport in W7-X.</p>","PeriodicalId":21111,"journal":{"name":"Review of Scientific Instruments","volume":"97 10","pages":""},"PeriodicalIF":1.6,"publicationDate":"2026-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149169755","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}
引用次数: 0
Generalized theory of second-harmonic orthogonally polarized dispersion interferometry and implementation for pulsed power electrode plasma measurements. 脉冲功率电极等离子体测量的二次谐波正交偏振色散干涉广义理论及实现。
IF 1.6 4区 工程技术
Review of Scientific Instruments Pub Date : 2026-10-01 DOI: 10.1063/5.0350688
Nathan R Hines, Jens Schwarz, Thomas J Awe, Mark A Gilmore
{"title":"Generalized theory of second-harmonic orthogonally polarized dispersion interferometry and implementation for pulsed power electrode plasma measurements.","authors":"Nathan R Hines, Jens Schwarz, Thomas J Awe, Mark A Gilmore","doi":"10.1063/5.0350688","DOIUrl":"https://doi.org/10.1063/5.0350688","url":null,"abstract":"<p><p>We present a generalized theoretical framework for Second-Harmonic Orthogonally Polarized Dispersion Interferometry (SHOP-DI) and the diagnostic's implementation for time-resolved electron areal-density measurements of pulsed-power Magnetically Insulated Transmission Line (MITL) electrode plasmas. The theoretical treatment extends standard SHOP-DI analysis by deriving the detected intensity response for arbitrary second-harmonic polarization angles, establishing a detector-bandwidth-limited criterion for the maximum trackable rate of change in electron areal density, modeling a counter-rotating phase-control-window system that enables reproducible phase-offset calibration, and introducing a power-normalized analysis method which separates refractive-index-induced phase shifts from static channel imbalance and common-mode optical-power fluctuations. Guided by these developments, the diagnostic was redesigned for operation on Sandia National Laboratories' (SNL's) 1 MA Mykonos accelerator, where MITL plasmas evolve on nanosecond time scales within sub-mm Anode-Cathode (A-K) gaps. The implemented system combines a 2 GHz bandwidth, corresponding to a maximum measurable areal-density rate of change of 4.8 × 1016 1/cm2/ns, with an overlapping 1/e2 probing beam waist diameter of ∼100μm. Improved optical throughput and optomechanical stiffness enabled the experiments at Mykonos to achieve a noise-limited 1σ areal-density uncertainty of 1.6 × 1014 1/cm2. These results provide design criteria for future SHOP-DI systems and demonstrate a high-bandwidth, high-sensitivity design useful for pulsed-power electrode plasma measurements.</p>","PeriodicalId":21111,"journal":{"name":"Review of Scientific Instruments","volume":"97 10","pages":""},"PeriodicalIF":1.6,"publicationDate":"2026-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149114598","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}
引用次数: 0
Machine-learning-based model for motional Stark effect calibrations. 基于机器学习的运动Stark效应校准模型。
IF 1.6 4区 工程技术
Review of Scientific Instruments Pub Date : 2026-10-01 DOI: 10.1063/5.0350330
Jinseok Ko, Juyoung Ko
{"title":"Machine-learning-based model for motional Stark effect calibrations.","authors":"Jinseok Ko, Juyoung Ko","doi":"10.1063/5.0350330","DOIUrl":"https://doi.org/10.1063/5.0350330","url":null,"abstract":"<p><p>The motional Stark effect (MSE) diagnostic on the Korea Superconducting Tokamak Advanced Research (KSTAR) device requires a beam-into-gas calibration to remove the Faraday-rotation contribution to the measured polarization angle. Because the secondary-neutral emission that contaminates this calibration grows with the torus gas pressure, the calibration is obtained by measuring the polarization angle over a range of pressures at a fixed vacuum field and extrapolating to zero pressure. Such measurements, however, exist only for a finite and irregularly sampled set of the major experimental parameters-the neutral-beam energy, the toroidal magnetic field, and the beam source-so that a calibration matching a given plasma discharge frequently does not exist and the conventional remedy of a simple linear interpolation between the nearest calibrated points remains incomplete. This work develops a supervised machine-learning model that infers the deviation of the MSE-measured polarization angle from the vacuum field for an arbitrary combination of these parameters, using the beam-into-gas data accumulated over the KSTAR FY2025 and FY2026 campaigns. A two-stage scheme that first reproduces the zero-pressure extrapolation and then learns the configuration dependence of the resulting angle is found to perform best. The improvement over the conventional linear-interpolation approach is demonstrated through the magnetic-axis evolution and through the safety factor and current density profiles of off-axis current-drive discharges.</p>","PeriodicalId":21111,"journal":{"name":"Review of Scientific Instruments","volume":"97 10","pages":""},"PeriodicalIF":1.6,"publicationDate":"2026-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149114526","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}
引用次数: 0
Visualization of energetic electron loss channels of electron cyclotron heating (ECH) plasma in ring trap 1 (RT-1) using an x-ray CCD camera. 环形阱1 (RT-1)中电子回旋加热等离子体高能电子损失通道的x射线CCD成像
IF 1.6 4区 工程技术
Review of Scientific Instruments Pub Date : 2026-10-01 DOI: 10.1063/5.0355015
H Saitoh, S Aoyagi, K Watanabe, R Ishikawa, K Ueda, N Kenmochi, M Nishiura
{"title":"Visualization of energetic electron loss channels of electron cyclotron heating (ECH) plasma in ring trap 1 (RT-1) using an x-ray CCD camera.","authors":"H Saitoh, S Aoyagi, K Watanabe, R Ishikawa, K Ueda, N Kenmochi, M Nishiura","doi":"10.1063/5.0355015","DOIUrl":"https://doi.org/10.1063/5.0355015","url":null,"abstract":"<p><p>An x-ray CCD camera was installed on RT-1, a dipole magnetic field device with a magnetically levitated superconducting (SC) coil. The diagnostic was used to investigate the loss channels of energetic electrons in electron cyclotron heating plasmas by imaging bremsstrahlung x rays generated at material surfaces. The camera views a region including the SC coil case and the coil elevator structures and has sensitivity to photons in the energy range of ∼1-12 keV. It can, therefore, visualize locations where energetic electrons, which produce a major fraction of the plasma pressure, are lost to metallic surfaces. Initial measurements were performed under mechanically supported, partially levitated, and fully levitated coil conditions. In the mechanically supported case, intense localized x-ray emission was observed from the support structure located in the relatively low-field region, indicating that this structure is the dominant energetic-electron loss surface. Magnetic levitation strongly reduced the localized emission and revealed a weaker ring-shaped loss region near the inner surface of the SC coil. Test particle orbit calculations were consistent with the observed x-ray emission patterns and qualitatively reproduced the upward shift of the energetic electron loss locations under the partially levitated condition. These observations demonstrate that energetic-electron losses in mechanically supported dipole plasmas are strongly influenced by the magnetic connectivity between the ECR region and exposed support structures. The results highlight the importance of considering energetic-electron orbit losses, in addition to mechanical constraints, when designing coil-support structures for higher-field dipole devices.</p>","PeriodicalId":21111,"journal":{"name":"Review of Scientific Instruments","volume":"97 10","pages":""},"PeriodicalIF":1.6,"publicationDate":"2026-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149114606","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}
引用次数: 0
A diagnostic platform for measuring mix in inertial confinement fusion experiments using narrowband self-emission imaging. 基于窄带自发射成像的惯性约束聚变实验混合测量诊断平台。
IF 1.6 4区 工程技术
Review of Scientific Instruments Pub Date : 2026-10-01 DOI: 10.1063/5.0348521
G N Hall, E Marley, S Davidovits, B Bachmann, T Ebert, B Hammel, V A Smalyuk, C R Weber, O L Landen, B J Kozioziemski, N H Nguyen, N Thompson, E R Casco, J A Tabimina, C M Krauland
{"title":"A diagnostic platform for measuring mix in inertial confinement fusion experiments using narrowband self-emission imaging.","authors":"G N Hall, E Marley, S Davidovits, B Bachmann, T Ebert, B Hammel, V A Smalyuk, C R Weber, O L Landen, B J Kozioziemski, N H Nguyen, N Thompson, E R Casco, J A Tabimina, C M Krauland","doi":"10.1063/5.0348521","DOIUrl":"https://doi.org/10.1063/5.0348521","url":null,"abstract":"<p><p>Understanding hydrodynamic mix in inertial confinement fusion (ICF) experiments is vital to improving fusion performance. Spectroscopy of tungsten-doped high-density carbon capsules on the National Ignition Facility shows L-shell emission features associated with different mix mechanisms. This paper describes the development of a diagnostic platform that uses multiple spherically bent crystal optics to produce high-resolution (∼10μm) narrowband (∼7 eV) x-ray images of emission from the capsule hotspot. This technique isolates L-shell emission corresponding to tungsten dopant in different ionization states, providing a high-resolution (≤10μm) image of the tungsten distribution. Since tungsten dopant is initially a component of the capsule ablator, the ability to image the presence of tungsten within the hotspot or the compressed fuel provides a new method of measuring mix. Data are presented from a 1 MJ (laser energy) proof-of-principle experiment, demonstrating that the measurement technique is capable of imaging both tungsten injected deep into the hotspot by the capsule fill-tube and tungsten released into the exterior of the hotspot from the inner region of the doped ablator. Simulation work is presented that explores how this measurement technique might be combined with down-scattered neutron imaging to understand the effect of ice-ablator mix on the burn wave in high-performance ICF experiments.</p>","PeriodicalId":21111,"journal":{"name":"Review of Scientific Instruments","volume":"97 10","pages":""},"PeriodicalIF":1.6,"publicationDate":"2026-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149246070","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}
引用次数: 0
Conceptual design of Thomson scattering system for detecting electron temperature anisotropy in magnetically confined plasma. 磁约束等离子体中探测电子温度各向异性的汤姆森散射系统的概念设计。
IF 1.6 4区 工程技术
Review of Scientific Instruments Pub Date : 2026-10-01 DOI: 10.1063/5.0350523
Kodai Hoshi, Hisamichi Funaba, Kentaro Sakai, Hiyori Uehara, Masato Ota, Haruki Kawaguchi, Hiroyuki Yamaguchi, Ryo Yasuhara
{"title":"Conceptual design of Thomson scattering system for detecting electron temperature anisotropy in magnetically confined plasma.","authors":"Kodai Hoshi, Hisamichi Funaba, Kentaro Sakai, Hiyori Uehara, Masato Ota, Haruki Kawaguchi, Hiroyuki Yamaguchi, Ryo Yasuhara","doi":"10.1063/5.0350523","DOIUrl":"https://doi.org/10.1063/5.0350523","url":null,"abstract":"<p><p>In magnetically confined plasmas, electron temperature anisotropy can be formed as a difference between the electron temperatures parallel and perpendicular to the magnetic field. In Compact Helical Device (CHD), a high temporal resolution Thomson scattering system is planned to be installed, which may enable detailed measurements of the temporal evolution of anisotropy. In this study, we designed Thomson scattering system configurations for detecting electron temperature anisotropy in CHD and evaluated the feasibility of anisotropy detection. We found that the single-pass configuration using an additional observation system can detect a temperature difference of 1.4 times between the perpendicular and parallel directions in the core region, although its detection performance deteriorates in the peripheral region. In contrast, the double-pass configuration using an additional counter-propagating laser path can detect a difference of 1.3 times over a wide radial range. These results indicate that the proposed configurations provide a basis for time-resolved measurements of electron temperature anisotropy in CHD.</p>","PeriodicalId":21111,"journal":{"name":"Review of Scientific Instruments","volume":"97 10","pages":""},"PeriodicalIF":1.6,"publicationDate":"2026-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149272853","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}
引用次数: 0
A molecular iodine-referenced absolute readout unit for kilohertz-accurate laser frequency determination. 一种用于千赫兹精度激光频率测定的分子碘参考绝对读出装置。
IF 1.6 4区 工程技术
Review of Scientific Instruments Pub Date : 2026-10-01 DOI: 10.1063/5.0347690
Timm Wegehaupt, Bennett Knecht, Malte Misfeldt, Vitali Müller, Sariga Sachit, Jose Sanjuan, Leander Staack, Gerhard Heinzel, Claus Braxmaier, Jens Grosse
{"title":"A molecular iodine-referenced absolute readout unit for kilohertz-accurate laser frequency determination.","authors":"Timm Wegehaupt, Bennett Knecht, Malte Misfeldt, Vitali Müller, Sariga Sachit, Jose Sanjuan, Leander Staack, Gerhard Heinzel, Claus Braxmaier, Jens Grosse","doi":"10.1063/5.0347690","DOIUrl":"https://doi.org/10.1063/5.0347690","url":null,"abstract":"<p><p>This paper presents a new iodine-referenced absolute frequency readout unit (ARU), developed to complement a high-finesse optical cavity-stabilized laser. The system enables precise absolute frequency determination and cavity drift tracking with accuracy at the kHz-level, while maintaining the short-term stability of a simultaneous cavity stabilization with a fractional frequency stability of σ = 3 · 10-15 at τ = 1 s. The system is developed with emphasis on deployment in future satellite missions, and it operates as a complementary module that does not interfere with the cavity stabilization. Using an iodine cell and a third-derivative lock technique, the required optical power is only 35 mW and thus reduced by one order of magnitude compared to conventional iodine-stabilized systems. Experimental results confirm that the ARU provides reliable long-term stability with a fractional frequency stability of σ < 1 · 10-11 for τ < 104 s, and it accurately follows large frequency drifts with MHz-amplitude. The presented concept marks a promising step toward compact, low optical power frequency references for laser interferometry, particularly suited to space missions.</p>","PeriodicalId":21111,"journal":{"name":"Review of Scientific Instruments","volume":"97 10","pages":""},"PeriodicalIF":1.6,"publicationDate":"2026-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149300043","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}
引用次数: 0
Film digitization using a cooled, fiber-optic faceplate-bonded charge-coupled device. 使用冷却的光纤面板键合电荷耦合器件的胶片数字化。
IF 1.6 4区 工程技术
Review of Scientific Instruments Pub Date : 2026-10-01 DOI: 10.1063/5.0350672
M J Michalko, A Sorce, J Katz, P V Heuer, S T Ivancic
{"title":"Film digitization using a cooled, fiber-optic faceplate-bonded charge-coupled device.","authors":"M J Michalko, A Sorce, J Katz, P V Heuer, S T Ivancic","doi":"10.1063/5.0350672","DOIUrl":"https://doi.org/10.1063/5.0350672","url":null,"abstract":"<p><p>Photographic film remains critical to x-ray diagnostics because it is the most resilient option for photon detection in high-radiation environments such as those present in inertial confinement fusion experiments. Film is traditionally digitized using a microdensitometer, which measures the optical density of a 20-μm square region and builds the image dataset by raster scanning. While the microdensitometer offers a high dynamic range, it requires a long processing time and is limited to a 12-bit digitizer resolution. A 16-bit, cooled CCD (charge-coupled device) bonded to a 6-μm-core fiber optic faceplate was tested as an alternative method for digitizing film. The film's emulsion layer was placed in direct contact with the fiber-optic faceplate to reduce scattered light. Multiple images were captured and averaged to mitigate photon statistical noise and digitizer noise intrinsic to the CCD. Spatial resolution and dynamic range were measured and compared against a Perkin-Elmer PDS microdensitometer system. Further development must be done for this platform, but a preliminary look suggests that a fiber-bonded CCD serves as a viable method for fast, quantitative film digitization.</p>","PeriodicalId":21111,"journal":{"name":"Review of Scientific Instruments","volume":"97 10","pages":""},"PeriodicalIF":1.6,"publicationDate":"2026-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149300110","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}
引用次数: 0
Stellarator reactor-relevant fusion exhaust analysis, including diagnostic synthesis from experiments on W7-X. 仿星器反应堆相关核聚变废气分析,包括W7-X实验的诊断性合成。
IF 1.6 4区 工程技术
Review of Scientific Instruments Pub Date : 2026-10-01 DOI: 10.1063/5.0350678
C C Klepper, S De Pascuale, G Schlisio, J A As-Sya'bani, B R Quinlan, S Varoutis, J Ongena, K Crombé, D Boeyaert, E Delabie, F Federici, C Killer, B Lomanowski, T M Biewer
{"title":"Stellarator reactor-relevant fusion exhaust analysis, including diagnostic synthesis from experiments on W7-X.","authors":"C C Klepper, S De Pascuale, G Schlisio, J A As-Sya'bani, B R Quinlan, S Varoutis, J Ongena, K Crombé, D Boeyaert, E Delabie, F Federici, C Killer, B Lomanowski, T M Biewer","doi":"10.1063/5.0350678","DOIUrl":"https://doi.org/10.1063/5.0350678","url":null,"abstract":"<p><p>The (ITER-prototype) diagnostic residual gas analyzer (p-DRGA) was deployed in the W7-X OP2.3 experimental campaign, with emphasis on W7-X research applications, i.e., going beyond diagnostic capability demonstration focus of the previous campaigns. In addition to an initial validation of neutrals modeling in sub-divertor regions for helium exhaust applications and support of the associate ICRF-induced fast ion generation research program, the diagnostic system also provided early data relevant to an envisioned DRGA-enabled, stellarator reactor-relevant, fusion plasma burn control study, to be extended in OP2.4 and beyond. In this extended study concept, the fast ion generation would serve as proxy to the ICRF-enhanced DT burn approach used in JET-DTE2/DTE3, while the DRGA will provide the relevant species concentrations in real-time. Implicit in this concept is the correlation between core and sub-divertor concentrations, in ∼few sec equilibration time, which still needs validation for the case of stellarators.</p>","PeriodicalId":21111,"journal":{"name":"Review of Scientific Instruments","volume":"97 10","pages":""},"PeriodicalIF":1.6,"publicationDate":"2026-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149300116","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}
引用次数: 0
Cauchois x-ray spectrometer sensitivity variation as 1/R with distance from the source. Cauchois x射线光谱仪灵敏度随离源距离的变化为1/R。
IF 1.6 4区 工程技术
Review of Scientific Instruments Pub Date : 2026-09-01 DOI: 10.1063/5.0348457
John Seely, Jack Glover, Albert Henins, Csilla I Szabo, Maylis Dozieres
{"title":"Cauchois x-ray spectrometer sensitivity variation as 1/R with distance from the source.","authors":"John Seely, Jack Glover, Albert Henins, Csilla I Szabo, Maylis Dozieres","doi":"10.1063/5.0348457","DOIUrl":"https://doi.org/10.1063/5.0348457","url":null,"abstract":"<p><p>High resolution molybdenum K-shell spectra were recorded by a Cauchois x-ray spectrometer as a function of the distance from the source. The intensities of the Mo Kα1 and Kα2 spectral lines near 17.4 keV energy were found to vary inversely with distance (1/R) from the crystal to the x-ray source at 0.5, 1.0, 1.5, and 2.0 m. The spectrometer consists of a cylindrically bent transmission crystal and an image plate detector placed on the Rowland circle where the spectral lines are focused. Ray tracing indicates the 1/R intensity variation results from the collection and focusing of the spectral lines on the Rowland circle detector and the divergence of rays in the direction perpendicular to the plane of the Rowland circle. This enhanced signal, compared to non-focusing instruments (1/R2), results in higher signal levels that are particularly important in applications where the spectrometer is far from the source, such as at pulsed-power and laser-driven fusion energy facilities where debris mitigation is an issue.</p>","PeriodicalId":21111,"journal":{"name":"Review of Scientific Instruments","volume":"97 9","pages":""},"PeriodicalIF":1.6,"publicationDate":"2026-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148977994","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}
引用次数: 0
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