For the leakage detection and localization in the vacuum chambers of future fusion reactors, this paper proposes a design method based on the coupling of remote operation and laser spectroscopy. By using a pulsed laser to ablate solid targets, the design excites leaked gases in the environment and generates a spectrum. Spectrometers and detectors are used to collect information on atomic spectral lines in the area, enabling leak detection. A remote-operated robot is then used to transport the spectrometer to different areas of the vacuum chamber for continuous sampling. The precise location of the leak can be determined based on the distribution trends of the leak gas concentration gradient. To fully validate the feasibility of leak location, this paper analysis the diffusion behaviour of the leaking gas under different gas types and background pressures using finite element software. The results show that the mass fraction distribution of the leaking gas within the vacuum chamber exhibits a monotonically decreasing spatial gradient along the primary direction of diffusion. This gradient exhibits a distinguishable decay pattern under various leakage gas conditions (air and water vapor) and at different background pressures, demonstrating the feasibility of using concentration gradients to locate leaks.

Porous metallic foams suffer from severe signal instability and matrix effects in laser-induced breakdown spectroscopy (LIBS) due to heterogeneous laser-material coupling and pore-driven plasma fluctuations, limiting accurate porosity discrimination. To address this challenge, we propose a novel multimodal strategy that integrates LIBS emission spectra and time-synchronized plasma plume image features, acquired simultaneously from a single laser pulse, to avoid spatiotemporal registration errors for plasma diagnostics and porosity classification. Porous nickel foams with four pore densities (40-100 PPI) and a dense Ni block were analyzed under high vacuum (5 & times; 10-5 mbar) to isolate pore structure effects. Plasma diagnostics confirmed local thermodynamic equilibrium (LTE) with electron densities ranging from 9.3 & times; 1016 to 1.76 & times; 1017 cm- 3 and plasma temperatures of 6500-9500 K, both increasing systematically with pore density. Classical machine learning (ML) models (SVM, RF, MLP, XGBoost) and deep learning architectures (1D-CNN for spectra, CNN-ResNet18 for images) were trained via five-fold stratified cross-validation. Standalone spectral models achieved a maximum accuracy of 69%, while image-based models reached 93%, demonstrating the superior discriminative power of morphology-driven features. A late-fusion model combining XGBoost-derived spectral features and CNNResNet18-extracted image features yielded an unprecedented classification accuracy of 98.2% with minimal variance, representing a 29.2% improvement over spectral-only models and 5.2% over the best unimodal approach. This work's innovations lie in: synchronized acquisition of complementary spectral and morphological data to eliminate cross-instrument registration errors; quantitative linking of pore density to plasma thermodynamic properties (temperature, electron density); and a physics-consistent fusion framework that harnesses compositional and structural information synergistically. The results validate a robust, data-driven approach for LIBS-based characterization of porous metallic foams, overcoming porosity-dependent plasma variability and enabling accurate assessment of structurally diverse porous materials.

Two-dimensional transition metal carbides/nitrides (MXenes) are promising electrode materials for super-capacitors, due to their excellent electrical conductivity and unique layered structure. Herein, inspired by robust "brick-mortar" architecture in construction, we propose a synergistic strategy to fabricate Ti3C2Tx MXene composite (MAC) films by integrating carboxylated cellulose nanofibers (CCNFs) as bio-based binders/interlayer spacers and silver nanowires (Ag-NWs) as conductive and structural reinforcements. The CCNFs act as a flexible "molecular mortar", forming hydrogen-bonded networks with MXene nanosheets to prevent restacking and create additional ion channels. Ag-NWs serve as "nanosteel cables", building three-dimensional conductive networks to enhance electron transport and mechanical robustness. Impressively, the optimized MAC film achieves a high specific capacitance of 432 F g-1 at 2 mV s-1 with a 103 % enhancement compared to pristine Ti3C2Tx (213 F g-1). It also maintains 94.8 % capacitance retention after 6500 cycles, demonstrating its superior cycling stability. The all-solid-state MAC device delivers an energy density of 10.6 Wh kg-1. Notably, under ultraviolet lamp irradiation, the MAC device has a specific capacitance of 90 F g-1 with 21.6 % capacitance increase. This improvement stems from accelerated ion diffusion driven by plasmon-induced heating effects. This architectural design provides a versatile approach to fabricating high-performance MXene-based energy storage devices for wearable electronics.

Ceramic particle-reinforced iron matrix composites (CPRIMCs) combine the high hardness and wear resistance of ceramic reinforcements with the strength, toughness, and cost-effectiveness of iron-based matrices, making them attractive for mining, cement, metallurgy, and other severe wear applications. However, the pronounced thermophysical and mechanical mismatch between ceramic particles and iron matrices often causes poor wettability, residual stress accumulation, inefficient load transfer, and interfacial debonding, making the reinforcement-matrix interface the primary factor governing wear performance and service reliability. Unlike previous reviews focusing mainly on reinforcement types or fabrication methods, this review establishes an interface-controlled wear framework that correlates atomic-scale interfacial bonding, microscale load transfer and damage evolution, and macroscopic tribological behavior. The interfacial characteristics and strengthening mechanisms of carbide, nitride, boride, and oxide reinforcements are comparatively analyzed, together with the effects of wettability, atomic diffusion, chemical reactions, mechanical interlocking, and transition-layer formation. Advanced interfacial engineering strategies, including processing optimization and surface metallization, are reviewed for enhancing wettability, interfacial bonding, and load-transfer efficiency. Their influence on two-body, three-body, impact-abrasive, erosion, and high-temperature abrasive wear is systematically elucidated. Major fabrication technologies are critically evaluated in terms of interfacial quality and industrial applicability. Finally, future research directions are proposed, including ceramic reinforcements with tunable thermophysical properties, three-dimensional interconnected architectures, and integrated multi-scale design strategies. This review provides a unified framework for the rational design of next-generation CPRIMCs with enhanced interfacial stability, wear resistance, and long-term service reliability.

The impurity information contained in the deposition layers on plasma-facing components (PFCs) is essential for understanding the plasma-wall interaction (PWI) processes in fusion devices. Although laser-induced breakdown spectroscopy (LIBS) has become a promising technology for in situ elemental analysis on PFCs, systematic investigations into the LIBS spectral characteristics of relatively thin deposition layers remain limited. In this study, tungsten (W) nanofilms of varying thicknesses were deposited on different substrates using arc ion plating to simulate the thin layers formed in fusion devices. LIBS measurements were performed at a pressure of 5 x 10-5 mbar to obtain the spectral signals from these nanofilms. The spectral features of W nanofilms with different thicknesses, deposited on various substrates and ablated by a one-shot laser, were systematically investigated. The properties of LIBS plasma for these nanofilms were analyzed, along with the relationship between spectral intensity and ablation volume, with special attention paid to the effects of localized surface plasmon resonance (LSPR). Results show that as the W nanofilms thickness and grain size decrease, the one-shot LIBS spectral intensity of W increases exponentially. For the thinnest films, the highest electron temperature and density were observed, attributed to LSPR effects near the interface. A numerical model was developed to qualitatively describe how spectral intensity varies with W nanofilm thickness, effectively decoupling multiple factors and aligning well with experimental data.

Boronization is a critical wall conditioning technique that improves the plasma performance of nuclear fusion devices by effectively reducing impurity levels. The team associated with the International Thermonuclear Experimental Reactor (ITER) has identified boronization as an effective means of mitigating the release of high-Z impurities. High-power long-pulse discharges conducted at the Experimental Advanced Superconducting Tokamak (EAST) have demonstrated the feasibility of ITER operations. A real-time monitoring of boron (B) layer thickness deposited on the first wall is crucial under these conditions. In this study, laser-induced breakdown spectroscopy (LIBS) has been applied to measure the thickness of ultra-thin boron films deposited on molybdenum (Mo) substrates at 5 x 10-5 mbar to simulate the EAST vacuum conditions. A series of boron films on Mo substrate samples with thicknesses ranging from 30 to 300 nm were produced by pulsed laser deposition (PLD). In ns-laser ablation, the first laser pulse penetrates the boron film and excites the underlying Mo substrate, producing stable spectral lines from boron (B II 703.19 nm) and molybdenum (Mo I 710.99 nm). A direct correlation is established between the intensity ratio of the B II 703.19 nm to Mo I 710.99 nm signals and the boron film thickness. A laser ablation model has been established and used to fit the experimental results, demonstrating consistency with the data. In addition, the relationship between the B/Mo signal intensity ratio and the relative amount of ablated material, calculated by calibration-free LIBS (CF-LIBS), has confirmed the validity of this approach. Based on experiments conducted using four different laser fluences, in-situ diagnostics of ultra--thin B film thickness in the 3.9-7.8 J/cm2 laser fluence range is recommended. The findings of this study have demonstrated the feasibility of LIBS technology for in-situ diagnostics of ultra-thin B layers as a means of monitoring the plasma-wall interaction (PWI) in fusion devices.

Hydrogen embrittlement (HE) has persisted for more than a century as one of the most intractable problems in materials science. The prevailing view1 that diffusive H governs embrittlement has fostered the widespread assumption that H trapping at crystal defects mitigates HE. Here we overturn this conventional paradigm. Using plasma/ion irradiation of tungsten, we decouple – for the first time – H-induced crack nucleation from subsequent cavity propagation, and reveal nucleation as a two-stage mechanochemical fracture instability enabled by trapped H in the absence of diffusive H. In the first stage, H accumulation to a critical occupancy at dislocation cores acts as a chemical fuse, collapsing the local cohesive strength to a threshold at which infinitesimal external loads can trigger atomic decohesion. This bond rupture instantaneously enables the second stage: confined recombination of atomic hydrogen into molecular form. The abrupt release of chemical energy within an atomically restricted volume generates a transient inflation pressure that drives a dynamic, brittle jump to an internal macroscopic cavity. By separating mechanical decohesion triggering from energetic crack driving, our results provide a deterministic framework for the onset of H-induced crack nucleation under low-stress conditions. Furthermore, we place experimentally the classical H-enhanced decohesion model on an atomistic foundation and elevate it from phenomenology to prediction. Finally, by shifting the focus from experimentally elusive diffusive H to directly measurable trapped H, this work reframes HE as a deterministic, quantifiable instability, establishing a new paradigm for understanding and mitigating H-induced failure in high-strength metals.

Conventional lignin-based carbons typically have sluggish ion transport and a limited number of active sites, which restrict their performance as electrodes in supercapacitors. A Moir & eacute;-like morphology was engineered by the insitu deposition of lignin carbon onto DVD matrix onto lignin carbon for the fabrication of a photo-assisted supercapacitor (PASC). The Moir & eacute;-like structure modulates light propagation across different frequencies by dispersion effects, thereby increasing surface light absorption and improving the electrochemical performance of the PASC. Under illumination, the carbon has a specific capacitance of 253.5 F g(-1) at 0.5 A g(-1), corresponding to a 35.6% improvement over one without this grating surface (186.9 F g(-1)). A symmetrical capacitor using this material has an areal capacitance of 58.84 mF cm(-2) and an energy density of 4.46 Wh kg(-1) at a power density of 365.2 W kg(-1), maintaining 85.2% of its initial capacitance after 5000 cycles, thus demonstrating excellent cycling stability. This work suggests a cost-effective strategy to simultaneously improve the light-harvesting ability and capacitive performance of PASCs.

This study systematically investigated the corrosion behavior of refractory medium-entropy alloys (RMEAs) composed of NbTaxTiV (x = 1, 1.25, 1.5, 1.75) in a 3.5 wt% NaCl solution. Combined analysis using X-ray diffraction (XRD), scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS), and electron back-scattered diffraction (EBSD) revealed that moderate addition of tantalum (Ta) effectively suppressed micro-segregation of alloy constituents and inhibited grain coarsening. However, excessive Ta addition increased both elemental segregation and grain size. This change in microstructure provided more active sites and pathways for the corrosion process. To quantitatively evaluate corrosion resistance, open-circuit potential (OCP), potentiodynamic polarization (PDP), electrochemical impedance spectroscopy (EIS), and Mott-Schottky (M-S) tests were conducted on four alloys in simulated seawater. The NbTa1.5TiV alloy exhibited excellent comprehensive corrosion resistance: current density decreased by 86.7%, charge transfer resistance significantly increased, passive film stability improved, and defect density reduced. XPS analysis confirmed that this performance enhancement resulted from the formation of a dense passive film dominated by high-valent oxides (Nb2O5/V2O5) on the alloy surface. To further validate the superior corrosion resistance of NbTaxTiV, immersion tests were conducted. The results indicated that the degree of element segregation and grain size exerted a critical influence on the corrosion resistance of the alloys: moderate element distribution uniformity and fine grain structure facilitate the formation of a dense, stable passive film, thereby enhancing the alloys’ corrosion resistance. Conversely, increased element segregation and coarse grain structure compromise the integrity of the passive film, reducing the alloys’ corrosion resistance.

This study systematically investigated the influence of heat treatment temperatures (800, 900, and 1000 degrees C) on the microstructure and mechanical properties of CoCrNiNb0.4 medium entropy alloys. The results indicated that heat treatment induced significant phase transformation and restructuring, wherein the as-cast FCC/Laves twophase eutectic structure transformed into a multi-phase composite microstructure comprising HCP, sigma, and NbNi3 phases. At 900 degrees C, the microstructure exhibited the finest refinement, with the precipitation phase displaying a core-shell structure. High-resolution TEM revealed significant lattice distortion at the phase boundaries. Concurrently, the alloy exhibited optimal mechanical properties at 900 degrees C, with yield strength, compressive strength, and microhardness reaching 2481 MPa, 2860 MPa, and 851 HV, respectively. These values represented substantial improvements of 60 %, 29 %, and 68 % over the as-cast state. However, when the temperature was raised to 1000 degrees C, grain coarsening and partial dissolution of the second phase led to a decline in the properties. The performance enhancement primarily stemmed from the synergistic effects of three strengthening mechanisms: matrix reinforcement by the sigma phase, interfacial strengthening through refined lamellar structures, and strain hardening via lattice distortion. The 900 degrees C process achieved optimal coordination among these strengthening factors, providing crucial evidence for regulating the strength of eutectic entropy alloys through heat treatment.

Atomic displacement – the fundamental process underlying diverse deformation and damage phenomena in metals, from irradiation defect production to stress-driven dislocation motion – is governed by interatomic cohesion strength. Here, lattice-dissolved hydrogen (LDH) occurring in metals under direct hydrogen exposure is identified to effectively weaken lattice cohesion, and thereby facilitating atomic displacement and dislocation movement upon plastic deformation in sub-threshold stress regime. This atomic-scale insight provides a physically transparent mechanism for hydrogen-enhanced localized plasticity implicated in hydrogen embrittlement. We quantitatively verify the hydrogen-induced lattice cohesion weakening effect on metal surfaces exposed to low-energy hydrogen plasma, where massive defects are generated despite the absence of sufficient ion momentum for direct displacement damage. By unprecedentedly quantifying the cohesion-weakening effect of LDH independently from defect-trapped H, we establish a new paradigm to understand hydrogen embrittlement.

This study employed hot extrusion preparation and hot rolling processes to produce Zr-2.5 Nb alloy. Three hot rolling temperatures of 620 degrees C, 710 degrees C, and 850 degrees C were established to systematically investigate the thermal deformation behaviour and microstructural evolution of Zr-2.5 Nb alloy under varying hot rolling temperatures. The effect of hot rolling temperature on the microstructure and recrystallization mechanism of Zr-2.5 Nb alloy were analysed using EBSD and TEM techniques. Results indicated that with increasing hot-rolling temperature, the content of FCC-Zr generated under extreme conditions progressively increased in the room-temperature microstructure, accompanied by a gradual enlargement of the average grain size. At both 620 degrees C and 710 degrees C, the grains exhibited relatively uniform distribution, with finer grain size observed after rolling at 620 degrees C. Axial direction (AD) concentrated on < 1010 > in the inverse pole map, forming a filamentary texture parallel to the rolling direction during hot rolling. Both dynamic recovery (DRV) and dynamic recrystallization (DRX) coexisted in the Zr-2.5 Nb alloy, with DRV being predominant. Within dynamic recrystallization (DRX), both continuous dynamic recrystallization (CDRX) and discontinuous dynamic recrystallization (DDRX) coexisted. CDRX dominated at medium-low temperatures (620 degrees C and 710 degrees C), while DDRX became increasingly prevalent as hot rolling temperatures rise. Furthermore, mechanical property testing of the Zr-2.5 Nb alloy revealed that low hot rolling temperature (LHRT: 620 degrees C) yielded superior tensile properties compared to high hot rolling temperature (HHRT: 850 degrees C). The Zr-2.5 Nb alloy hot-rolled at 620 degrees C exhibited a yield strength of 437.82 MPa, a tensile strength of 694.38 MPa, and excellent plasticity of 31 %. These findings provide a theoretical basis for enhancing the quality of oxide films in Zr-2.5 Nb alloys used for medical orthopaedic joint applications.

This study employed vacuum arc melting to prepare a series of CoCrNiNbx (x = 0, 0.2, 0.3, 0.4, 0.5) medium entropy alloys (MEAs) through niobium (Nb) alloying design. The effects of Nb content on microstructure, mechanical properties, and high-temperature oxidation resistance at 900 degrees C were systematically investigated. The addition of Nb induced the formation of a lamellar eutectic structure composed of FCC and Laves phases, causing the microstructure to evolve from hypereutectic to eutectic and then to hypereutectic with increasing x. Among these, the CoCrNiNb0.4 alloy with a complete eutectic microstructure exhibited optimal comprehensive properties, achieving a compressive strength of 2219 MPa and plastic strain retention of 20.2%. This strengthening primarily stemmed from the grain boundary strengthening induced by the eutectic lamellar structure. Under oxidation at 900 degrees C, all alloys followed a parabolic oxidation pattern, with oxidation rate constants (k) for Nb-containing alloys consistently below 10-2 mg2 & sdot;cm-4 & sdot;h-1, indicating the formation of a protective oxide film. Notably, the k value for CoCrNiNb0.4 further decreased to the 10-3 order of magnitude. This is attributed to the in-situ formation of a continuous Nb-enriched Laves phase barrier at the oxide layer/alloy interface, which effectively inhibits cation outward diffusion. Concurrently, the dense Cr2O3 internal oxide layer generated within the alloy synergistically contributes to constructing an efficient oxidation resistance protection system. This study simultaneously achieves 'eutectic structure strengthening' and 'interface barrier protection' through single-element alloying, offering a novel approach for designing eutectic medium-entropy alloys with outstanding mechanical properties and high-temperature oxidation resistance.

Laser-induced breakdown spectroscopy (LIBS) is a powerful in-situ diagnostic technique for real-time, multi-element analysis in extreme environments. In this work, copper (Cu) pellets were fabricated by compressing metallic powders under different compaction pressures (198 MPa – 1164 MPa), resulting in samples with varying densities (6.22–8.47 g/cm3). The influence of compaction pressure on laser-induced plasma characteristics was systematically investigated under vacuum conditions (6 × 10−5 mbar). The results show that the intensity of Cu I emission lines increases with increasing compaction pressure (corresponding to higher density) and approaches a saturation regime at high pressure levels. Meanwhile, the relative standard deviation decreases significantly from ∼20% to below 6%, indicating a substantial improvement in signal reproducibility. Plasma diagnostics based on Boltzmann plot and Stark broadening analyses reveal that the electron temperature remains nearly unchanged, whereas the electron density increases markedly (up to ∼3×) with increasing compaction pressure, with a more pronounced effect observed at lower laser fluence. Plasma imaging at a fixed delay shows enhanced plume expansion with increasing compaction pressure. In contrast, ablation crater analysis reveals a decreasing trend in crater depth for highly compacted samples. This behavior is likely associated with enhanced plasma shielding effects, which may reduce effective laser energy coupling to the target. These results indicate that compaction pressure plays a critical role in governing LIBS signal characteristics under vacuum conditions. Overall, this study provides a clearer understanding of matrix effects associated with compacted powder materials and offers useful guidance for improving LIBS diagnostics of porous and compacted materials in environments relevant to fusion applications.

Laser wavelength plays a critical role in laser-matter coupling, plasma formation, and the analytical sensitivity of laser-induced breakdown spectroscopy (LIBS). In this study, the influence of three laser wavelengths (1064, 532, and 355 nm) on emission characteristics, limits of detection (LoD) of trace elements, plasma parameters, and ablation volume of Al-Li alloy samples was systematically investigated under a vacuum of 5 & times; 10-5 mbar. At a constant laser fluence of 4 J cm-2, set according to the operating conditions of the in-situ LIBS system used for monitoring deposited impurities on the inner wall of the EAST tokamak, excitation with the 355 nm laser produced significantly stronger atomic emission signals, higher electron temperature (Te) and electron density (ne), and lower LoDs. This improvement is attributed to more efficient energy coupling between the laser and the sample surface at shorter wavelengths. Specifically, the LoDs of Mg, Cu, and Cr decreased from 0.253, 0.684, and 0.303 a.t. % at 1064 nm to 0.066, 0.142, and 0.018 a.t. % at 355 nm, respectively. In contrast, irradiation at 1064 nm resulted in a larger ablation volume and deeper craters, indicating that enhanced spectral signal intensity is not determined solely by the amount of ablated material but is also strongly governed by plasma excitation efficiency. These results demonstrate that LIBS at 355 nm offers significant potential for high-sensitivity, low-damage, in-situ detection of trace impurities in fusion-relevant materials.

In this study, a trace amount of boron was added to the NbTaTi1.5V RHEA to enhance its strength. Specifically, (NbTaTi1.5V)100-xBx alloys with varying boron contents were fabricated by ball milling and spark plasma sintering (SPS). With the addition of 1 at.% boron, the compressive fracture strength of the alloy increased by 21.3% relative to the B0 alloy, rising from 2975 to 3610 MPa. A compressive fracture strain of 14.8% was maintained. The microhardness increased from 881 ± 67 HV to 1060 ± 60 HV, corresponding to an improvement of 20.4%. The microstructure analysis indicated that the (NbTaTi1.5V)100-xBx alloys were composed of three fine-grained phases, namely BCC phase, TiO phase and TiB phase. The addition of trace amounts of boron led to significant grain refinement, resulting in a uniform and refined microstructure in the sintered alloys. The average grain size of B1 alloy was only 0.91 µm, representing a 67% reduction compared with that of the B0 alloy (2.82 µm). This provided a favorable microstructural foundation for the synergistic strengthening of the alloys. The boron element contributed 48.2% of the yield strength enhancement in B1 alloy by grain boundary strengthening through grain refinement, which was the dominant strengthening mechanism. TiB and TiO particles promoted dislocation proliferation, resulting in an additional strengthening contribution of approximately 28.7%. Furthermore, the TiB phase enhanced resistance to plastic deformation by impeding dislocation slip through crack deflection. This synergistic multi-mechanism strengthening strategy offers an effective approach for improving the mechanical properties of (NbTaTi1.5V)100-xBx alloys.

Accurate helium (He) retention detection in plasma-facing components (PFCs) is critical for fusion reactor safety, efficiency, and longevity. Boron-molybdenum (B-Mo) coated tungsten mimicking real-world multilayered boronized PFCs in EAST/ITER-like tokamaks poses challenges for laser-induced breakdown spectroscopy (LIBS) due to weak He emission, matrix variability, and unoptimized laser parameters. This study addresses these limitations via systematic laser fluence optimization for He-I 587.56 nm detection. Key innovations include: (1) identification of an approximate helium emission threshold of 3.50 J/cm(2) and highest helium signal efficiency at 5.77 J/cm(2) for the present LIBS configuration, enabling sustained He signals across 7 consecutive ablation shots (1.5 & times; higher depth resolution than suboptimal fluences) with reproducible relative standard deviation (RSD = 4.2%); (2) revelation of distinct element-specific fluence responses, He signal exhibits apparent saturation above 8.75 J/cm(2) fluence during the first laser shot; however, when considering subsequent shots, the average intensity continues to increase with increasing fluence, while B emission intensifies monotonically providing a framework for multi-element depth profiling; (3) methodological rigor via calibrated laser spot size (1.206 +/- 0.008 mm) and beam mode preservation (M-2 < 1.1). Complementary validations confirm reliability: thermal desorption spectroscopy (TDS) quantifies He retention at 4.93 & times; 10(20) atoms/m(2), cross-sectional scanning electron microscopy (SEM) verifies defect-free multilayers (B: similar to 1.19 mu m, Mo: similar to 2.23 mu m). Plasma parameters were estimated assuming local thermodynamic equilibrium (LTE). This work advances LIBS as a transformative in-situ diagnostic for fusion reactors, offering a generalizable fluence-optimized protocol for complex nuclear materials and enabling precise He monitoring in realistic PFCs to support real-time wall conditioning and erosion assessment in ITER and future tokamaks.

Impurities generated by plasma-wall interactions significantly impact the performance of nuclear fusion devices by increasing radiation and dilution of plasma while also forming co-deposited layers on plasma-facing components that retain critical hydrogen isotopes like tritium. This study utilized laser-induced breakdown spectroscopy (LIBS) to investigate impurity distribution and composition on the surface of the gas puffing pipe (GPP) for the Lower Hybrid Wave system in the Experimental Advanced Superconducting Tokamak (EAST) tokamak during the 2021 experimental campaign. Elemental analysis found impurities (Cu, W, Mo, C, and Li) originating from specific components and materials in the EAST. Further analysis revealed complex co-deposition patterns, where impurity levels increased from a melt region, peaked near the melt region, and then decreased toward the end of the pipe. This distribution indicates a dynamic competition between erosion and deposition processes. Spatial analysis further revealed higher impurity concentrations on the ion side of the pipe compared to the electron side, likely due to differences in plasma interactions. To achieve quantitative measurements of impurities, one-point calibration LIBS (OPC-LIBS) was utilized to enhance the analytical accuracy of impurity deposition on the GPP. The results confirm that OPC-LIBS is an applicable approach for the quantitative analysis of impurity deposition in fusion devices.