Jet System Research Articles

Contrasting Responses of Hailstorms to Anthropogenic Climate Change in Different Synoptic Weather Systems

AbstractHailstones and extreme precipitation generate substantial economic losses across the United States (US) and the globe. Their strong association with short‐lived, intense convective storms poses a great challenge in predicting their future changes. Here, we conducted model simulations at 1.2 km grid spacing for severe convective storms with large hail and heavy precipitation that occurred in two typical types of synoptic‐scale environments in spring seasons over the central US under both current and future climate conditions. We find that the responses of large hail (diameters >2.5 cm) to anthropogenic climate change (ACC) are markedly different between the hailstorms developed in the two types of synoptic‐scale environments, with over 110% increase in large hail occurrences for the frontal systems, whereas less than 30% increase for the Great Plains low‐level jet (GPLLJ) systems. This is explained by the larger increase in convective intensity and updraft width and a smaller increase in warm cloud depth in the frontal storms compared with the GPLLJ storms. Interestingly, the occurrences and intensity of heavy precipitation (rain rate >20 mm hr−1) in both types of systems are similarly sensitive to ACC (e.g., 40% and 33% increases in the occurrences for the frontal and GPLLJ systems, respectively). These results advance our knowledge of hail projection and have important implications for managing risks for future hail.

X-Ray Jets in the High-redshift Quasars J1405+0415 and J1610+1811

We investigate Chandra X-ray observations of the radio-loud quasars J1405+0415 and J1610+1811 at redshifts z = 3.215 and z = 3.122, respectively, for evidence of extended X-ray emission. Observations totalling 95 ks per target are combined, and X-ray jets that are spatially coincident with known radio features are detected at a greater than 4σ significance. Hardness ratios and emission spectra are determined for all X-ray features, and X-ray fluxes and luminosities are measured. Jet-to-core X-ray flux ratios are estimated for each system, and the ratios are consistent with those observed for nearby and more distant jet systems, although the spread in the parameter is large. These results suggest that to first order the X-ray jet emission mechanisms are redshift invariant. In addition to the extended emission analysis, incorporating also archival data from Swift, we examined the properties of a decline in the Chandra flux from the active galactic nucleus (AGN) of J1610+1811 observed between 2018 and 2021. We conclude that the variability is most likely due to a flaring event that occurred between the years 2017 and 2018 and originated from either the AGN or the inner jet region.

A comparative numerical analysis of design variation plans for a shallow tunnel in very soft ground after a sudden accident

A severe accident of surrounding soil failure occurred during the construction of Zizhi Tunnel, a shallow tunnel in very soft ground using the shallow tunneling method in Hangzhou, China. We provide an in-depth comparison with careful evaluation of three design variation plans through 3D numerical analyses on the stress distribution inside the advance core, ground deformation, and soil arching over the tunnel crown. Consequently, the third support design scheme, i.e., soil reinforcement using sub-horizontal Metro Jet System (MJS) piles, is recommended as it leads to the smallest disturbance to the surrounding ground, and is the most favorable for the soil arching formation. We also find that the advance core’s stability is crucial for preventing the face failure and reducing the surface settlement. Finally, the effectiveness of world’s first successful example of applying sub-horizontal MJS piles to reinforce tunnel excavation in very soft soil is verified by the field monitoring data.

Reactive plasma oxygen-modified and nitrogen-doped soft carbon as a potential anode material for lithium-ion batteries using a tornado-type atmospheric pressure plasma jet

In this study, a tornado-type atmospheric pressure plasma jet (APPJ) system was used to modify soft carbon (SC) as an anode material for lithium-ion batteries (LIBs). We used both argon plasma–derived reactive oxygen species and reactive nitrogen species to activate SC electrodes in an ambient environment using in-situ hydrophilic surface modification and nitrogen-doping technology. After the APPJ modification, the contact angle of the electrode was substantially reduced from 113° to less than 10° because of the formation of oxygen-containing functional groups on the SC surface. The hydrophilic nature of the plasma-modified electrode facilitated the penetration of liquid electrolyte. In addition, during the APPJ process, nitrogen atoms were simultaneously doped into the SC to increase its conductivity, reversible capacity, and rate capability. According to electrochemical measurements, the SC-40 electrode (40 cycles of plasma treatment) exhibited a reversible charge and discharge capacity of 293 and 259 mAh/g, respectively, with a Coulombic efficiency of 88.63 % at 0.1C. At 10 C, the reversible capacity of the SC-40 electrode achieved 111 mAh/g, which was 252% greater than that of the pristine SC electrode (approximately 44 mAh/g). Plasma-induced surface hydrophilicity and nitrogen-incorporated soft carbon as an anode material for LIBs using a tornado-type APPJ technique represents a unique and promising technique.

Influence of the water jet system vs cavitron ultrasonic surgical aspirator for liver resection on the remnant liver.

BACKGROUNDSeveral methods, such as finger fracture, Pean crush, cavitron ultrasonic surgical aspirator (CUSA), and water jet (WJ), are used for hepatic parenchymal dissection in liver surgery. CUSA is the conventional method in Japan. WJ is a relatively novel method for parenchymal dissection. Although it has several advantages, such as lower volume of blood loss and shorter operative time, the effect of the WJ system for hepatic dissection on the remnant liver has not yet been investigated.AIMTo investigate and compare the effect of the WJ method vs CUSA on the remnant liver cut surface.METHODSThis observational study compared the two types of parenchymal transection methods (WJ vs CUSA) in liver surgery. In total, 24 and 40 patients who underwent hepatectomy using the WJ method and CUSA, respectively, were included in the analysis. Accordingly, the clinicopathological characteristics and clinical outcomes of 24 and 40 patients were compared. Furthermore, postoperative contrast-enhanced computed tomography (CT) scan was performed to assess the cut surface length of the remnant liver and the degenerative thickness of the areas with a reduced contrast effect in the dissected plane. Then, the two groups were compared.RESULTSOn CT scan, the median areas of denaturation in the liver dissection planes were 522 (range: 109.5-1242) mm2 in the CUSA group and 324 (range: 93.6-1529) mm2 in the WJ group. The area did not significantly differ between the two groups; however, the denaturation thickness of the WJ group was significantly lower than that of the CUSA group [5.8 (range: 0.7-11.1) mm vs 3.3 (range: 1.7-10.4) mm, P < 0.001].CONCLUSIONThe WJ group had significantly thinner contrast-enhanced areas in the post hepatectomy detached section than the CUSA group.

Numerical Analysis on Self-Propulsion of a Waterjet-Propelled Ship with Different Propulsion Models

The hydrodynamics of the waterjet-propelled ship is a challenging issue due to the sophistication of waterjet system geometry as well as waterjet–hull interaction. In current study, three different propulsion models, namely, multiple reference frame (MRF) model, sliding mesh model and body-force model, are utilized to simulate the self-propulsion of a waterjet-propelled ship model. A body-force model based on a User-Defined Function (UDF) on the ANSYS Fluent platform is proposed. The computational cost, wave pattern, jet stream surface, and self-propelled hull resistance of the MRF model and body-force model are compared. Comprehensive comparisons of the internal ingested flow field of the control volume are made, especially at the capture area and nozzle section, with the two different models. In addition, the resistance increment fraction and jet system thrust deduction fraction with the two different models are investigated. Lastly, the flow field with the steady MRF model, the body-force model (RANS) and the transient sliding mesh model (URANS) are compared.

Dijet production at EIC and interplay of Sudakov and saturation effects in Weizsacker-Williams TMD gluon distribution

We study production of dijets at the EIC using the small-x Improved Transverse Momentum Dependent factorization (ITMD), which is a framework based on the Color Glass Condensate theory. Dijet production in DIS is the simplest process directly coupled to the Weizsäcker-Williams TMD gluon distribution, which is the only small-x gluon distribution possessing the gluon number density interpretation. We study various observables sensitive to the interplay of the Sudakov effects and the nonlinear effects, in particular the azimuthal correlations between the jet system and the scattered electron.

Measurement of angular and momentum distributions of charged particles within and around jets with the ATLAS detector

Studies of jet fragmentation in heavy-ion collisions can provide information about the mechanism of jet quenching inside the hot and dense QCD matter created in these collisions. These proceedings present results from measurements of charged particle yields within and around the jets in dijet, gamma+jet and Z+jet systems measured in $5.02$~TeV Pb+Pb and $pp$ collisions using the ATLAS detector at the LHC.

The morphology of the HD 163296 jet as a window on its planetary system

Context. HD 163296 is a Herbig Ae star which drives a bipolar knotty jet with a total length of ~6000 au. Strong evidence exists that the disk of HD 163296 harbors planets. Studies have shown that the presence of companions around jet-driving stars could affect the morphology of the jets. This includes a ‘wiggling’ of the jet axis and a periodicity in the positions of the jet knots. Aims. In this study we investigate the morphology (including the jet width and axis position) and proper motions of the HD 163296 jets, and use our results to better understand the whole system. Methods. This study is based on optical integral-field spectroscopy observations obtained with VLT/MUSE in 2017. Using spectro-images and position velocity diagrams extracted from the MUSE data cube, we investigated the number and positions of the jet knots. A comparison was made to X-shooter data collected in 2012 and the knot proper motions were estimated. The jet width and jet axis position with distance from the star were studied from the extracted spectro-images. This was done using Gaussian fitting to spatial profiles of the jet emission extracted perpendicular to the position angle of the jet. The centroid of the fit is taken as the position of the jet axis. Results. We observe the merging of knots and identify two previously undetected knots. We find proper motions that are broadly in agreement with previous studies. The jet width increases with distance from the source and we measure an opening angle of ~5° and 2.5° for the red and blue lobes, respectively. Measurements of the jet axis position, derived from Gaussian centroids of transverse intensity profiles, reveal a similar pattern of deviation in all forbidden emission lines along the first 20 arcsec of the jets. This result is interpreted as being due to asymmetric shocks and not due to a wiggling of the jet axis. Conclusions. The number of new knots detected and their positions challenge the 16-yr knot ejection periodicity proposed in prior studies, arguing for a more complicated jet system than was previously assumed. We use the non-detection of a jet axis wiggling to rule out companions with a mass &gt;0.1 M⊙ and orbits between 1 au and 35 au. Any object inferred at these distances using other methods must be a brown dwarf or planet, otherwise it would have impacted the jet axis position. Both the precession and orbital motion scenarios are considered. Overall it is concluded that it is difficult to detect planets with orbits &gt;1 au through a study of the jet axis.

Black Hole to Photosphere: 3D GRMHD Simulations of Collapsars Reveal Wobbling and Hybrid Composition Jets

Long-duration γ-ray bursts (GRBs) accompany the collapse of massive stars and carry information about the central engine. However, no 3D models have been able to follow these jets from their birth via black hole (BH) to the photosphere. We present the first such 3D general-relativity magnetohydrodynamic simulations, which span over six orders of magnitude in space and time. The collapsing stellar envelope forms an accretion disk, which drags inwardly the magnetic flux that accumulates around the BH, becomes dynamically important, and launches bipolar jets. The jets reach the photosphere at ∼1012 cm with an opening angle θ j ∼ 6° and a Lorentz factor Γ j ≲ 30, unbinding ≳90% of the star. We find that (i) the disk–jet system spontaneously develops misalignment relative to the BH rotational axis. As a result, the jet wobbles with an angle θ t ∼ 12°, which can naturally explain quiescent times in GRB lightcurves. The effective opening angle for detection θ j + θ t suggests that the intrinsic GRB rate is lower by an order of magnitude than standard estimates. This suggests that successful GRBs are rarer than currently thought and emerge in only ∼0.1% of supernovae Ib/c, implying that jets are either not launched or choked inside most supernova Ib/c progenitors. (ii) The magnetic energy in the jet decreases due to mixing with the star, resulting in jets with a hybrid composition of magnetic and thermal components at the photosphere, where ∼10% of the gas maintains magnetization σ ≳ 0.1. This indicates that both a photospheric component and reconnection may play a role in the prompt emission.

Evaluation of the grinding process utilizing an auxiliary compressed air jet on cleaning the grinding wheel surface

Grinding is one of the most complex and precise machining operations, with the performance of the grinding wheel being heavily reliant on its surface conditions. Removed chips tend to be forced back to the wheel surface due to the intense heat generated in the grinding zone. The loaded chips block the wheel's grinding capability, resulting in increased grinding force and temperature, wheel chatter, and workpiece thermal degradation. To solve these problems, this research examines the effectiveness of an auxiliary compressed air jet system during the grinding of spk tool steel with an alumina grinding wheel to clean the wheel surface of lodged chips and then the percentage of wheel loading for different tests will also be evaluated. The compressed air nozzle was examined from a variety of perspectives (0, 30, 45, and 60). Grinding with and without a cleaning system, as well as conventional cutting fluid, were also employed as comparisons. In certain output results, input parameters such as grinding wheel speed (20 m/s), cutting depth (20 m), and feed rate (100 mm/s) were maintained constant. When compared to other experiments with different cleaning nozzles, the optimal inclination angle of 45°, which allows the maximum air to reach the interface between the wheel surface and chips, removed chips by pushing them off the wheel surface. Other cleaning nozzles, such as 0°, 30°, and 60°, were less successful. The incidence angle of 45° produced the best results in terms of surface roughness, diametrical grinding wheel wear, G-ratio, tangential forces, specific energy, and wheel loading analysis. Image processing was used to detect and identify chips accumulated between abrasive grains on the wheel surface. To better understand the structure of the wheel and workpiece surface, optical and scanning electron microscopy pictures were taken and analyzed. This research adds to our understanding of the grinding wheel loading mechanism and its dynamics.

Orthogonal experiment on underwater rock breaking by gas–liquid two-phase jet

Cutting and breaking operations are common in underwater drilling and mining engineering. Because the resistance of the underwater environment is reduced, the gas-assisted water jet method improves the rock-breaking performance of ordinary water jets. However, the rock-breaking mechanism of a gas–liquid two-phase jet in an underwater environment is unclear. Furthermore, the influence of the jet parameters on its rock-breaking performance needs to be studied. Therefore, the fundamental structure of an underwater gas–liquid two-phase jet was analyzed further in this work. On this basis, a rock-breaking orthogonal experiment was conducted. The effects of the water jet system pressure, air flow pressure, transverse velocity, and erosion distance on the rock-breaking performance of underwater gas–liquid two-phase jet were investigated. The essential reasons for the variation in jet erosion performance were discussed. Furthermore, the order of importance and significance of the above four factors on the rock-breaking performance were analyzed, and reasonable jet working parameters were determined. The results show that rock breaking is the result of the joint action of the microjet formed by the water-phase jet impact and gas-phase cavitation collapse. In general, the system pressure has the highest impact on the rock-breaking performance. Therefore, a higher water-jet system pressure should be applied in underwater gas–liquid two-phase jet-breaking operations. The preferred values of the working parameters for the test conditions and selected parameters are as follows: air flow pressure = 0.4 MPa, traverse velocity = 3 m/min, and erosion distance = 10 mm. The research results can provide technical guidance and a reference for underwater cutting and breaking operations.

Atmospheric pressure plasma jet: formation of Wenzel’s model supportive surface modification on PMMA

ABSTRACT The generation of cold plasma at atmospheric pressure by using atmospheric-pressure plasma jet (APPJ) system and its use in the treatment of the poly-methyl-methacrylate (PMMA) have been reported in the manuscript. The cold plasma is generated at atmospheric pressure with 120 watt and 200 watt power and 3 litres/min and 5 litres/min argon flow using a 13.56 MHz radio frequency generator. PMMA samples are treated with aforesaid parameters for different time durations. After treatment, the formation of a carbon-rich surface has been observed, while a visible and significant amount of changes in surface morphology, roughness, adhesion strength and contact angle have been observed. Due to the APPJ treatment, the Wenzel’s model supportive microconical structures have been formed for hydrophobic surfaces. Optical emission spectroscopy has been used to identify the various species in the plasma and for electron temperature measurement. The discharge phenomenon at atmospheric pressure has been understood using the basic plasma model. The interaction of the plasma with the surface has been explained using the sub-plantation model.

Symbiosis of deflagration and detonation in one jet system – A hybrid detonation engine

For the first time, a model of a hybrid detonation engine has been developed and experimentally tested. It consists of two autonomous (independent of each other) jet plants: a rotating detonation module (RDM) and a well-known turbojet engine. The features of the RDM operation and the conditions for the existence of a detonation mode when using mixtures: jet fuel-oxygen and jet fuel-oxygen-air are studied. It has been established that the detonation mode in the jet fuel-oxygen mixture occurs soon after the start of the RDM (approximately after 3–5 ms), but the detonation wave velocities are relatively low. Further, the detonation mode is enhanced, and the detonation waves are accelerated to sufficiently high velocities – 2000 m/s or more. The air supply to the RDM contributes to the intensification of the detonation mode. In this case, the wave makes up to 12 rounds around the annular chamber at velocities up to 2700 m/s against 9 rounds (maximum) at velocities up to 2200 m/s when burning a jet fuel–oxygen mixture. The thrust created by the detonation module reaches 25% of the thrust of the turbojet engine associated with it.

Thermal conduction effects on the accretion–ejection mechanism. Outflow process investigation

ABSTRACT Astrophysical jets emanating from different systems are one of the most spectacular and enigmatic phenomena pervading the Universe. These jets are typically bipolar and span hundreds of thousands of light years, some even longer than the diameter of our Milky Way. The study of the disc–jet systems is motivated by the observed correlation between ejection and accretion signatures and is still under debate. It was shown in our previous work the crucial role of thermal conduction in the dynamics of a thin viscous resistive accretion disc orbiting a central object and was provided an unprecedented wealth of discussion that has advanced our understanding of the inflow process. In this work, we expand our exploration by addressing the most outstanding basic questions concerning the launching, acceleration, and collimation processes of the jet in presence of thermal conduction. We also tackle in depth-analysis the effects of this physical ingredient on the time evolution of temperature and on mass fluxes such as inflow and outflow rates. We performed a series of 2.5-dimensional non-relativistic time-dependent numerical calculations of a disc–jet system using the PLUTO code. Our results revealed compelling evidence that thermal conduction contributes to launching a faster and more collimated jet. The mass extracted from the disc via the outflow channel is also affected by the presence of thermal conduction in the sense that the ejection efficiency is significantly improved.

Determination of Electrons Temperature and Density For Ag, Zn, and Cu metals using Plasma jet System at atmospheric pressure

Under atmospheric pressure, an argon plasma stream was sustained and its plasma characteristics were examined. The emission spectra of plasma created in a plasma jet system using argon gas were observed for three metals (Ag, Zn, and Cu) for the anode and varied flow rates ranging from 1–4 L/min. at constant voltage, and normal atmospheric pressure. The spectral lines of excited Ar, Ag, Zn, and Cu species were identified at a wavelength of (650–900) nm .The Debye length, sphere, and temperature of an electron are all measured. Optical emission spectrometer (OES) equipment was used to capture the spectrum produced by the plasma at various argon gas flow rates.The temperature and density of the electron (Te) and (ne) ranges for Ar-gas, Ag, Zn, and Cu-anode increased as the stream pace of argon gas to the plasma made by the release current (D.C.) expanded.(1.241- 1.473)eV and (1.93 x1018–6.38 x1018 ) cm-3 , (1.187– 1.245) eV and (4.32 x1016–6.23 x1016 ) cm-3 , (1.374 -1.631)eV and (4.01 x1018 – 12.1 x1018 ) cm-3 respectively . The intensity of spectral lines, on the other hand, increased.

Effective mitigation of cross-contamination in classroom conditioned by intermittent air jet cooling with use of portable air cleaners

This work investigated the effect of using portable air cleaners (PACs) in a classroom ventilated by an intermittent air jet system (IAJS) for reducing the risk of cross-contamination. The classroom had two student groups separated by an aisle where the PACs were placed and operated continuously. A 3-D computational fluid dynamic (CFD) model was developed and validated experimentally to predict the complex transient flow field. The spread of contaminants from one group to another (scenario 1) and from one row to another within one group (scenario 2) was evaluated in terms of reaching concentration levels similar to the case implementing the 2-m distancing between students. Two indicators were used; the intake fraction index (iF) and an exposure reduction index (ER) that compared the proposed system to a reference case when the PAC is not used (“No-PAC”).It was found that a PAC flowrate of 350 m3/h was able to fulfill the aforementioned criteria for typical IAJS flow rate of 294 l/s and a period of 4.5 min. The proposed system reduced the exposure by 67% for the students sitting in the same group of the infected student and by 87% for the students sitting in the neighboring group compared to the “No-PAC” case. The maximum exposure level of IJAS-PAC system was lower than that obtained with seating distance of 2 m. Furthermore, it was found that operating the PAC at 350 m3/h resulted in 3% increase of the energy compared to operation of the IAJS alone.

Testing the harmfulness of chemical cleaning methods for the removal of incrustations from a glazed stoneware public artwork

• Cleaning methods were evaluated for removing a Ca-rich incrustration formed over a crystalline glaze of an stoneware outdoor public artwork that comprised a water jet system. • Incrustration was characterized and cleaning methods were selected: mechanical method (dry microblasting with sand, alumina and peach pit) and chemical methods (HNO 3 , Na 3 EDTA, Ionex H and Kalkrent® an “environmental friendly” commercial detergent). • Harmfullness was tested in laboratory on replicas produced with artist using a multianalytical approach to evaluate the effect of the cleaning methods. • Mechanical methods were damaging, but could be used to reduce the thickness of incrustration. • All chemical cleaning methods caused alteration of the glaze, except Ionex H, altering mostly the glassy phase. Incrustations are a common conservation problem, particularly in artworks exposed to water. Calcium-rich layers tend to build over their surface making cleaning interventions necessary to improve the chemical stability and restore readability. Harmfulness tests are crucial for selecting cleaning methodologies for glazed surfaces due to their mechanical and chemical susceptibility. This study selected a combination of cleaning methods to test their adequacy to remove a Ca incrustations from a modern glazed artwork. The tested methods were mechanical (dry-blasting with sand, alumina and peach) and chemical (HNO 3 , Na 3 EDTA, Ionex H and Kalkrent® an “environmental friendly” commercial detergent). To assess the effect of the cleaning methods replica substrates of the glazed ceramic were subjected to the different methodologies. Harmfulness was assessed by: (i) mass variation measurements to evaluate the material loss; (ii) microscopy techniques (optical, scanning electron and confocal laser microscopy) to evaluate morphological and surface topography alterations and (iii) μ-Raman to detect changes in the glass structure. Results indicated that the glassy phase was the most affected, and Ionex H was the less harmful of the tested cleaning products. The first in situ testing revealed that a combined approach will be most effective using microblasting for reducing the thickness of the incrustation, followed by the selected chemical method Ionex H.

Nanoscale plasma-activated aerosol generation for in situ surface pathogen disinfection

Plasma treatment constitutes an efficient method for chemical-free disinfection. A spray-based system for dispensing plasma-activated aerosols onto surfaces would facilitate disinfection of complex and/or hidden surfaces inaccessible to direct line-of-sight (for example, UV) methods. The complexity and size of current plasma generators (for example, plasma jet and cometary plasma systems)—which prohibit portable operation, together with the short plasma lifetimes, necessitate a miniaturized in situ technique in which a source can be simultaneously activated and administered on-demand onto surfaces. Here, we demonstrate this possibility by combining two nanoscale technologies for plasma and aerosol generation into an integrated device that is sufficiently small and lightweight. Plasma is generated on a carpet of zinc oxide nanorods comprising a nanoneedle ensemble, which when raised to a high electric potential, constitutes a massive point charge array with near-singular electric fields to effect atmospheric breakdown. The plasma is then used to activate water transported through an underlying capillary wick, that is subsequently aerosolized under MHz-order surface acoustic waves. We show that the system, besides being amenable to miniaturization and hence integration into a chipscale device, leads to a considerable improvement in plasma-activation over its macroscale cometary discharge predecessor, with up to 20% and 127% higher hydrogen peroxide and nitrite ion concentrations that are respectively generated in the plasma-activated aerosols. This, in turn, leads to a 67% reduction in the disinfection time to achieve 95% bacterial load reduction, therefore demonstrating the potential of the technology as an efficient portable platform for on-demand field-use surface disinfection.

The application of novel rotary plasma jets to inhibit the aflatoxin-producing Aspergillus flavus and the spoilage fungus, Aspergillus niger on peanuts

The major safety risk of peanuts is contamination with aflatoxin. Cold atmospheric plasma (CAP) has been demonstrated to inactivate fungi effectively. In this study, a novel CAP device with a rotary jet system was used to inactivate the existing A. flavus and A. niger on peanuts. The initial inoculation levels were 6.39 and 5.83 log CFU/g of A. flavus and A. niger, respectively. After treatments at 180 W for 7.5 min and 200 W for 5 min, A. flavus was not detected. For A. niger, the treatments at 180 W for 10 min and 200 W for 5 min resulted in undetected population. Observation under scanning electron microscope revealed the fungal spores were evidently damaged. The growth of A. flavus and aflatoxin concentrations were significantly lower (p < 0.05) on the group treated with 200 W for 5 min than other treatment groups stored for 29 d. Oil quality indexes of the CAP-treated peanuts were maintained in the range of excellent grades. This study demonstrated CAP effectively inhibited fungal growth and toxin production without adversely affected oil quality.