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JOURNAL ARTICLE
Yiping Wu, Shen'aoyi Liu, Qing Wang, Rong Chen, Yuanyuan He, Li Fu, Wanting Li, Ruiyi Yang
Focusing on the situation of the low helium content in natural gas resource in China and the high cost of helium extraction, the OPEX prediction model of helium extraction that based on the Response Surface Methodology (RSM) is proposed. This method applies ASPEN-HYSYS software to simulate the helium extraction process flow for a given product composition, pressure, and temperature; Applying the Design Expert module for Response Surface Methodology(RSM) parameter design, combined with OPEX of existing projects, determine the key influencing factors and upper and lower limits of OPEX, and obtaining the corresponding OPEX for different parameter values; Applying the Box Behnken Design (BBD) principle to optimize the helium extraction process parameters of RSM, based on fitting results and parameter significance verification of second-order regression function, the OPEX prediction model is built...
April 15, 2024: Heliyon
#2
JOURNAL ARTICLE
Zhen Cao, F Aharonian, Axikegu, Y X Bai, Y W Bao, D Bastieri, X J Bi, Y J Bi, W Bian, A V Bukevich, Q Cao, W Y Cao, Zhe Cao, J Chang, J F Chang, A M Chen, E S Chen, H X Chen, Liang Chen, Lin Chen, Long Chen, M J Chen, M L Chen, Q H Chen, S Chen, S H Chen, S Z Chen, T L Chen, Y Chen, N Cheng, Y D Cheng, M Y Cui, S W Cui, X H Cui, Y D Cui, B Z Dai, H L Dai, Z G Dai, Danzengluobu, X Q Dong, K K Duan, J H Fan, Y Z Fan, J Fang, J H Fang, K Fang, C F Feng, H Feng, L Feng, S H Feng, X T Feng, Y Feng, Y L Feng, S Gabici, B Gao, C D Gao, Q Gao, W Gao, W K Gao, M M Ge, L S Geng, G Giacinti, G H Gong, Q B Gou, M H Gu, F L Guo, X L Guo, Y Q Guo, Y Y Guo, Y A Han, M Hasan, H H He, H N He, J Y He, Y He, Y K Hor, B W Hou, C Hou, X Hou, H B Hu, Q Hu, S C Hu, D H Huang, T Q Huang, W J Huang, X T Huang, X Y Huang, Y Huang, X L Ji, H Y Jia, K Jia, K Jiang, X W Jiang, Z J Jiang, M Jin, M M Kang, I Karpikov, D Kuleshov, K Kurinov, B B Li, C M Li, Cheng Li, Cong Li, D Li, F Li, H B Li, H C Li, Jian Li, Jie Li, K Li, S D Li, W L Li, W L Li, X R Li, Xin Li, Y Z Li, Zhe Li, Zhuo Li, E W Liang, Y F Liang, S J Lin, B Liu, C Liu, D Liu, D B Liu, H Liu, H D Liu, J Liu, J L Liu, M Y Liu, R Y Liu, S M Liu, W Liu, Y Liu, Y N Liu, Q Luo, Y Luo, H K Lv, B Q Ma, L L Ma, X H Ma, J R Mao, Z Min, W Mitthumsiri, H J Mu, Y C Nan, A Neronov, L J Ou, P Pattarakijwanich, Z Y Pei, J C Qi, M Y Qi, B Q Qiao, J J Qin, A Raza, D Ruffolo, A Sáiz, M Saeed, D Semikoz, L Shao, O Shchegolev, X D Sheng, F W Shu, H C Song, Yu V Stenkin, V Stepanov, Y Su, D X Sun, Q N Sun, X N Sun, Z B Sun, J Takata, P H T Tam, Q W Tang, R Tang, Z B Tang, W W Tian, C Wang, C B Wang, G W Wang, H G Wang, H H Wang, J C Wang, Kai Wang, Kai Wang, L P Wang, L Y Wang, P H Wang, R Wang, W Wang, X G Wang, X Y Wang, Y Wang, Y D Wang, Y J Wang, Z H Wang, Z X Wang, Zhen Wang, Zheng Wang, D M Wei, J J Wei, Y J Wei, T Wen, C Y Wu, H R Wu, Q W Wu, S Wu, X F Wu, Y S Wu, S Q Xi, J Xia, G M Xiang, D X Xiao, G Xiao, Y L Xin, Y Xing, D R Xiong, Z Xiong, D L Xu, R F Xu, R X Xu, W L Xu, L Xue, D H Yan, J Z Yan, T Yan, C W Yang, C Y Yang, F Yang, F F Yang, L L Yang, M J Yang, R Z Yang, W X Yang, Y H Yao, Z G Yao, L Q Yin, N Yin, X H You, Z Y You, Y H Yu, Q Yuan, H Yue, H D Zeng, T X Zeng, W Zeng, M Zha, B B Zhang, F Zhang, H Zhang, H M Zhang, H Y Zhang, J L Zhang, Li Zhang, P F Zhang, P P Zhang, R Zhang, S B Zhang, S R Zhang, S S Zhang, X Zhang, X P Zhang, Y F Zhang, Yi Zhang, Yong Zhang, B Zhao, J Zhao, L Zhao, L Z Zhao, S P Zhao, X H Zhao, F Zheng, W J Zhong, B Zhou, H Zhou, J N Zhou, M Zhou, P Zhou, R Zhou, X X Zhou, X X Zhou, B Y Zhu, C G Zhu, F R Zhu, H Zhu, K J Zhu, Y C Zou, X Zuo
We present the measurements of all-particle energy spectrum and mean logarithmic mass of cosmic rays in the energy range of 0.3-30 PeV using data collected from LHAASO-KM2A between September 2021 and December 2022, which is based on a nearly composition-independent energy reconstruction method, achieving unprecedented accuracy. Our analysis reveals the position of the knee at 3.67±0.05±0.15 PeV. Below the knee, the spectral index is found to be -2.7413±0.0004±0.0050, while above the knee, it is -3...
March 29, 2024: Physical Review Letters
#3
Daniel C Segal, Ate Visser, Cas Bridge
Attributing the sources of legacy contamination, including brines, is important to determine remediation options and to allocate responsibility. To make sound remediation decisions, it is necessary to distinguish subsurface sources, such as leaking oil and gas ("O&G") wells or natural upward fluid migrations, from surface releases. While chemical signatures of surface and subsurface releases may be similar, they are expected to imprint specific dissolved noble gas signatures, caused by the accumulation of terrigenic noble gases in subsurface leaks or re-equilibration of noble gases following surface releases...
April 13, 2024: Ground Water
#4
JOURNAL ARTICLE
Ziyi Cao, Xingjun Li, Hongdong Song, Yu Jie, Chang Liu
To establish the safe and reproducible effects of cold plasma (CP) technology on food products, this study evaluated the gelatinization parameters, fatty acid profile, and hygroscopic properties of rice grains repeatedly treated with low-pressure radiofrequency (RF) helium CP (13.56 MHz, 140 Pa, 120 W-20s, 0-4 times, and 300 g sample). Compared with the untreated (zero times) sample, with an increase in CP treatment times from one to four on rice, the water contact angle and cooking time decreased, while the water absorption rate and freshness index increased, and the pH value remained unchanged...
March 29, 2024: Foods (Basel, Switzerland)
#5
JOURNAL ARTICLE
Simon Kunze, Pierre Perrier, Rodion Groll, Benjamin Besser, Stylianos Varoutis, Andreas Lüttge, Irina Graur, Jorg Thöming
The interaction of rarefied gases with functionalized surfaces is of great importance in technical applications such as gas separation membranes and catalysis. To investigate the influence of functionalization and rarefaction on gas flow rate in a defined geometry, pressure-driven gas flow experiments with helium and carbon dioxide through plain and alkyl-functionalized microchannels are performed. The experiments cover Knudsen numbers from 0.01 to 200 and therefore the slip flow regime up to free molecular flow...
April 12, 2024: Scientific Reports
#6
JOURNAL ARTICLE
Michel Rachkidi, Ambroisine Michel, Guy Raffin, Régis Barattin, Eric Colinet, Jérôme Randon
Hydrodynamics, efficiency, and loading capacity of two semi-packed columns with different cross sections (NANO 315 µm x 18 µm; CAP 1000 µm x 28 µm) and similar pillar diameter and pillar-pillar distance (respectively 5 µm and 2.5 µm) have been compared in high-pressure gas chromatography. A flow prediction tool has been first designed to determine pressure variations and hold-up time across the chromatographic system taking into account the rectangular geometry of the ducts into the semi-packed columns...
April 3, 2024: Journal of Chromatography. A
#7
JOURNAL ARTICLE
Ludovica M Epasto, Thibaud Maimbourg, Alberto Rosso, Dennis Kurzbach
We reveal an interplay between temperature and radical concentration necessary to establish thermal mixing (TM) as an efficient dynamic nuclear polarization (DNP) mechanism. We conducted DNP experiments by hyperpolarizing widely used DNP samples, i.e., sodium pyruvate-1-13 C in water/glycerol mixtures at varying nitroxide radical (TEMPOL) concentrations and microwave irradiation frequencies, measuring proton and carbon-13 spin temperatures. Using a cryogen consumption-free prototype-DNP apparatus, we could probe cryogenic temperatures between 1...
April 10, 2024: Journal of Magnetic Resonance
#8
JOURNAL ARTICLE
Jie Zhang, Wei Zhang, Jiangtao Zhang, Jiqing Fu, Chao Wang
Helium optically pumped sensor is widely used in the application for the detection of weak magnetic fields, and the cell is the core component of that, which needs an external excitation signal to ignite and maintain its luminosity, and its luminosity affects the sensitivity performance of the sensor. To improve the performance of the cell and reduce the power consumption of the system, which is the largest power consumption component in the sensor, this study presents the design of a driver circuit for a helium cell based on a high-voltage pulse source and high-frequency excitation source and uses a T-type impedance matching circuit to realize the efficient transmission of energy...
April 1, 2024: Review of Scientific Instruments
#9
JOURNAL ARTICLE
Sodai Tanaka, Taku Nakaji, Hideyuki Mizuno, Kota Mizushima, Ken Katagiri, Koki Kasamatsu, Takamitsu Masuda, Taku Inaniwa
At the National Institutes for Quantum Science and Technology (QST), a multi-ion therapy using helium, carbon, oxygen, and neon ions has been studied for charged particle therapy with more optimal biological effects. To make multi-ion therapy clinically feasible, a new treatment system was developed to realize the changes of the ion species in each irradiation using the Heavy Ion Medial Accelerator in Chiba (HIMAC). Since radiation therapy is safety-critical, it is necessary to construct a safety system that includes multiple safety barriers in the new treatment system for multi-ion therapy and to perform a safety analysis for the prevention of serious accidents...
2024: Japanese Journal of Medical Physics
#10
JOURNAL ARTICLE
Karel Novotný, Ivo Krempl, Lukáš Pečinka, Lukáš Moráň, Petr Vaňhara, Josef Havel
This work aims to demonstrate the potential of pulsed laser ablation synthesis (PLA) of tellurium nanoparticles (Te NPs) for use in matrix assisted laser desorption/ionization mass spectrometry (MALDI-MS) applications. An experimental laboratory setup for PLA synthesis of fresh Te NPs was designed to prevent unwanted aggregation of uncoated Te NPs and avoid the need to use additional modifiers. Performing pulsed laser ablation synthesis in liquid (PLAL) using acetone was found to be the optimal way of preparing Te NPs...
April 5, 2024: Talanta
#11
JOURNAL ARTICLE
Ranveig Flatabø, Sabrina D Eder, Thomas Reisinger, Gianangelo Bracco, Peter Baltzer, Björn Samelin, Bodil Holst
Neutral helium atom microscopy is a novel microscopy technique which offers strictly surface-sensitive, non-destructive imaging. Several experiments have been published in recent years where images are obtained by scanning a helium beam spot across a surface and recording the variation in scattered intensity at a fixed total scattering angle θSD and fixed incident angle θi relative to the overall surface normal. These experiments used a spot obtained by collimating the beam (referred to as helium pinhole microscopy)...
March 25, 2024: Ultramicroscopy
#12
JOURNAL ARTICLE
Haohao Gu, Kaixin Meng, Ruowei Yuan, Siyang Xiao, Yuying Shan, Rui Zhu, Yajun Deng, Xiaojin Luo, Ruijie Li, Lei Liu, Xu Chen, Yuping Shi, Xiaodong Wang, Chuanhua Duan, Hao Wang
Manipulating liquid flow over open solid substrate at nanoscale is important for printing, sensing, and energy devices. The predominant methods of liquid maneuvering usually involve complicated surface fabrications, while recent attempts employing external stimuli face difficulties in attaining nanoscale flow control. Here we report a largely unexplored ion beam induced film wetting (IBFW) technology for open surface nanofluidics. Local electrostatic forces, which are generated by the unique charging effect of Helium focused ion beam (HFIB), induce precursor film of ionic liquid and the disjoining pressure propels and stabilizes the nanofilm with desired patterns...
April 5, 2024: Nature Communications
#13
JOURNAL ARTICLE
Y Gao, T Cao, K Z Lin, D L Guo, S F Zhang, X L Zhu, R T Zhang, S C Yan, S Xu, D M Zhao, X Ma
This paper presents a novel reaction microscope designed for ion-atom collision investigations, established at the Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou, China. Its time-of-flight (TOF) spectrometer employs an innovative flight-time focusing method consisting of two acceleration regions, providing optimal time focusing conditions for charged fragments with diverse initial velocities. The TOF spectrometer's axis intentionally tilts by 12° relative to the ion beam direction, preventing potential obstructions from the TOF grid electrodes...
April 1, 2024: Review of Scientific Instruments
#14
JOURNAL ARTICLE
S J Haselschwardt, R Gibbons, H Chen, S Kravitz, A Manalaysay, Q Xia, W H Lippincott, P Sorensen
We report the first measurement of discrimination between low-energy helium recoils and electron recoils in liquid xenon. This result is relevant to proposed low-mass dark matter searches which seek to dissolve light target nuclei in the active volume of liquid-xenon time projection chambers. Low-energy helium recoils were produced by degrading α particles from ^{210}Po with a gold foil situated on the cathode of a liquid xenon time-projection chamber. The resulting population of helium recoil events is well separated from electron recoils and is also offset from the expected position of xenon nuclear recoil events...
March 15, 2024: Physical Review Letters
#15
JOURNAL ARTICLE
K E Castoria, H Byeon, J Theis, N R Beysengulov, E O Glen, G Koolstra, M Sammon, S A Lyon, J Pollanen, D G Rees
We describe a helium source cell for use in cryogenic experiments that is hermetically sealed in situ on the cold plate of a cryostat. The source cell is filled with helium gas at room temperature and, subsequently, sealed using a cold weld crimping tool before the cryostat is closed and cooled down. At low temperatures, the helium condenses and collects in a connected experimental volume, as monitored via the frequency response of a planar superconducting resonator device sensitive to small amounts of liquid helium...
April 1, 2024: Review of Scientific Instruments
#16
JOURNAL ARTICLE
Wolfgang Korsch, Mark Broering, Ashok Timsina, Kent K H Leung, Joshua Abney, Dmitry Budker, Bradley W Filippone, Jiachen He, Suman Kandu, Mark McCrea, Murchhana Roy, Christopher Swank, Weijun Yao
This paper presents a new technique to study the adsorption and desorption of ions and electrons on insulating surfaces in the presence of strong electric fields in cryoliquids. The experimental design consists of a compact cryostat coupled with a sensitive electro-optical Kerr device to monitor the stability of the electric fields. The behavior of nitrogen and helium ions on a poly(methyl methacrylate) (PMMA) surface was compared to a PMMA surface coated with a mixture of deuterated polystyrene and deuterated polybutadiene...
April 1, 2024: Review of Scientific Instruments
#17
JOURNAL ARTICLE
Lorenz Kranabetter, Henrik H Kristensen, Constant A Schouder, Henrik Stapelfeldt
Alkali trimers, Ak3, located on the surface of He nanodroplets are triply ionized following multiphoton absorption from an intense femtosecond laser pulse, leading to fragmentation into three correlated Ak+ ions. Combining the information from threefold covariance analysis of the emission direction of the fragment ions and their kinetic energy distributions P(Ekin), we find that Na3, K3, and Rb3 have an equilateral triangular structure, corresponding to that of the lowest lying quartet state A2'4, and determine the equilibrium bond distance Req(Na3) = 4...
April 7, 2024: Journal of Chemical Physics
#18
JOURNAL ARTICLE
Lucas Araujo, Felipe Fantuzzi, Thiago M Cardozo
Herein, we predict the first set of covalently bonded triatomic molecular compounds composed exclusively of noble gases. Using a combination of double-hybrid DFT, CCSD(T), and MRCI+Q calculations and a range of bonding analyses, we explored a set of 270 doubly charged triatomics, which included various combinations of noble gases and main group elements. This extensive exploration uncovered nine noble-gas-exclusive covalent compounds incorporating helium, neon, argon, or combinations thereof, exemplified by cases such as He3 2+ and related systems...
March 29, 2024: Journal of Physical Chemistry Letters
#19
JOURNAL ARTICLE
Hoang Van Ngoc
Research into nanomaterials yields numerous exceptional applications in contemporary science and technology. The subject of this investigation is a one-dimensional nanostructure, six atoms wide, featuring hydrogen-functionalized edges. The theoretical foundation of this study relies on Density Functional Theory (DFT) and is executed through the utilization of the Vienna Ab initio Simulation Package (VASP). The outcomes demonstrate the stability of adsorption configurations, along with the preservation of a hexagonal honeycomb lattice...
March 2024: Royal Society Open Science
#20
JOURNAL ARTICLE
Madline P Gund, Jusef Naim, Antje Lehmann, Matthias Hannig, Markus Lange, Axel Schindler, Stefan Rupf
Several studies have shown that cold atmospheric plasma (CAP) treatment can favourably modify titanium surfaces to promote osteoblast colonization. The aim of this study was to investigate the initial attachment of primary human osteoblasts to plasma-treated titanium. Micro-structured titanium discs were treated with cold atmospheric plasma followed by the application of primary human osteoblasts. The microwave plasma source used in this study uses helium as a carrier gas and was developed at the Leibniz Institute for Surface Modification in Leipzig, Germany...
March 18, 2024: Biomedicines
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