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激光诱导荧光诊断中荧光频率极限的实验研究

核聚变与等离子体物理 2023年第1期43卷 112-116页

作者：栾春阳徐国盛叶孜崇江堤张炜靳琛垚中国科学院等离子体物理研究所合肥230031 中国科学技术大学合肥230026

在用激光诱导荧光法测量多偶极腔体中的氩等离子体的离子速度分布函数的实验中,研究了激光频率与信号强度的关系。在给定等离子体放电参数条件下,发现存在一个入射激光诱导荧光的极限频率,大于该频率时荧光强度不再增加。该诱导荧光的... 详细信息

在用激光诱导荧光法测量多偶极腔体中的氩等离子体的离子速度分布函数的实验中,研究了激光频率与信号强度的关系。在给定等离子体放电参数条件下,发现存在一个入射激光诱导荧光的极限频率,大于该频率时荧光强度不再增加。该诱导荧光的极限频率随荧光收集系统中透镜组中的小孔大小而改变。

关键词：激光诱导荧光激光诱导荧光的极限频率信噪比

Presheath formation and area design limit satellite-based Langmuir probes

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Plasma Science and Technology 2023年第12期25卷 1-13页

作者：靳琛垚叶孜崇孙海岗江堤张炜徐国盛王亮 Institute of Plasma Physics Hefei Institutes of Physical ScienceChinese Academy of SciencesHefei 230031People’s Republic of China University of Science and Technology of China Hefei 230026People’s Republic of China

In this article,the effect of the finite conductive surface area of a satellite on the use of satellite-based Langmuir probes is reviewed in light of the basic theory of asymmetric double Langmuir probes(ADLPs).Recent theoretical and experimental studies have discussed electron sheath/presheath formation and the electron Bohm criterion along with their implications for satellite-based Langmuir *** effects predicted by the latest theory of the electron Bohm criterion were not experimentally observed and the experimental results remain supportive of a critical area ratio(A_(L)/A_(S))_(crit)=(m_(i)/(2.3m_(e)))^(1/2)between the probe area A_(S)and the satellite area A_L as conventionally believed.A satellite-based Langmuir probe must satisfy this criterion to physically act as a single Langmuir ***,experimental investigations also found that high-energy electrons adversely affect(A_(L)/A_(S))_(crit)and a Langmuir probe's signal quality by giving additional electron current to A_(L).Based on these results,a number of limitations of the maximum probe area are derived when designing satellite-based Langmuir probes,with consideration of both the aim of the satellite and the plasma where the satellite-based probe *** proposed measures are expected to only partially alleviate the effect of the inadequate satellite surface area on the application of satellite-based Langmuir *** a larger satellite to carry a Langmuir probe remains the most viable means to obtain precise space plasma parameters.

关键词： space plasmas satellite-based Langmuir probe sheath/presheath electric propulsion

Fast-sweeping Langmuir probes:what happens to theⅠ–Ⅴtrace when sweeping frequency is higher than the ion plasma frequency?

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Plasma Science and Technology 2022年第2期24卷 93-106页

作者： Chenyao JIN chi-shung YIP Wei ZHANG Di JIANG Guosheng XU Institute of Plasma Physics Hefei Institutes of Physical ScienceChinese Academy of SciencesHefei 230031People's Republic of China University of Science and Technology of China Hefei 230026People's Republic of China

Limited particle transit time is one of several limiting factors which determine the maximum temporal resolution of a Langmuir *** this work,we have revisited the known fast sweep Langmuir probe techniques in a uniform,quiescent multi-dipole confined hot cathode discharge with two operation scenarios:one in which the probe sweeping frequency fsweepis much lower than the ion plasma frequency fpi,another one where fsweepis much greater than fpi,*** allows investigation into the effect of limited ion-motion on I–V *** distortions of I–V traces at high frequencies,previously claimed to be an ion-motion limitation effect,were not found unless shunt resistance is sufficiently high,despite a f;/f;ratio of~*** the other hand,evidences of sheath capacitance on the I–V traces have been *** of I–V traces qualitatively agree with predictions of sheath capacitance response to the sweeping ***,techniques in fast sweep Langmuir probe are briefly *** comparison between the high-speed dual Langmuir probe(HDLP)and the single probe setup shows that the capacitive response can be removed via subtracting a leakage current for the single probe setup almost as effectively as using the HDLP setup,but the HDLP setup does remain advantageous in its facilitation of better recovery of weak current signal commonly in low density plasma.

关键词： high speed diagnostics time resolved diagnostics Langmuir probe

Development of a compact high-density blue core helicon plasma device under 2000 G magnetic field of ring permanent magnets

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Plasma Science and Technology 2022年第9期24卷 77-84页

作者： Zhikang LU Guosheng XU Chi-Shung YIP Dehong CHEN Xingquan WU Wei ZHANG Guanghai HU Chenyao JIN Di JIANG Institute of Plasma Physics Hefei Institutes of Physical ScienceChinese Academy of SciencesHefei 230031People’s Republic of China University of Science and Technology of China Hefei 230026People’s Republic of China

A helicon wave plasma source in a tube of ring permanent magnets(PMs)has been constructed to study the effect of the conflguration of the magnetic fleld with zero magnetic points on plasma *** device also serves as an exploration platform for a simple,compact helicon wave plasma source adaptable to engineering applications.A small-diameter(26 mm)highdensity(~10^(18)m^(-3))blue core plasma is produced in~1 Pa argon by helicon RF(radiofrequency)discharge using a NagoyaⅢantenna under magnetic fleld(~2 k G)of compact ring PMs(length~204 mm).Operational parameters,*** power and neutral gas pressure are scanned and plasma density is measured by an RF compensated probe to explore the operating characteristics of the *** feature of a helicon discharge,such as blue core plasmas and E-H-W mode transitions are well observed in the device,despite the wavelength calculated using the conventional dispersion relation of a bounded whistler waves(Chen 1991 Plasma *** 33339)is order of magnitudes longer than the length of the plasma in this device which seems to suggest that such helicon device is ***,the wavelength calculated by the unbounded whistle wave dispersion formula in turn suggests the occurrence of a half wavelength resonance.

关键词： mode transitions compact helicon high-density plasma helicon plasma blue core

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国内风电产业成本分析

电器工业 2025年第1期 82-84页

作者：侯垚机械工业北京电工技术经济研究所

针对我国风电产业情况,重点分析了风电场、风力发电机组、风电变流器成本构成。

关键词：风电产业成本分析

微氧浓度对印染废水水解酸化效率及微生物代谢的影响

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水处理技术 2025年第1期 59-63+70页

作者：任杰辉裴垚谢奇奇程文惠佳瑶刘蓝西安理工大学市政与环境工程系陕西省土地工程建设集团有限责任公司

以印染废水微氧水解酸化为研究对象，探究了微氧浓度对印染废水水解酸化效率及产酸效率影响，分析了微生物多样性、组成及代谢功能，结合冗余度分析（RDA）解析微氧浓度、水解酸化效率、微生物组成之间的关系，揭示了印染废水微氧水解... 详细信息

以印染废水微氧水解酸化为研究对象，探究了微氧浓度对印染废水水解酸化效率及产酸效率影响，分析了微生物多样性、组成及代谢功能，结合冗余度分析（RDA）解析微氧浓度、水解酸化效率、微生物组成之间的关系，揭示了印染废水微氧水解酸化作用机理。结果表明，微氧浓度提高了印染废水的水解酸化效率，在微氧0.1～0.3 mg/L条件COD、聚乙烯醇（PVA）和脱色率分别高达41.40%、34.03%和76.96%，且可生化性（BOD5/COD）从0.36提升至0.56；微氧浓度提高了水解酸化过程中Acidobacteria、Bacteroidetes和Firmicutes的相对丰度，在微氧浓度0.1～0.3 mg/L条件水解酸化相关的功能微生物的丰度较高；微氧条件微生物对碳水化合物的合成与降解和高分子化合物降解功能丰度较高。这些研究可为印染废水高效处理与资源化利用提供可靠的技术保障。

关键词：印染废水水解酸化微氧有机物降解微生物群落

基于反应气混合物的ICP-MS/MS测定原油中的钒和镍

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光谱学与光谱分析 2025年第1期45卷 101-106页

作者：蔡松韬黄莹秀袁亮代宇宣莫垚坤黄建华湖南工学院材料科学与工程学院湖南衡阳421002 湖南省中医药研究院中药研究所湖南长沙410013

原油中金属元素钒和镍(V和Ni)的含量和比值可为深入了解原油的沉积环境特征和有机质类型发挥重要作用。在原油炼制过程中,V和Ni作为原油催化裂化过程中的有害金属元素,会降低催化剂的活性,严重时会导致催化剂中毒,会严重腐蚀设备,在精... 详细信息

原油中金属元素钒和镍(V和Ni)的含量和比值可为深入了解原油的沉积环境特征和有机质类型发挥重要作用。在原油炼制过程中,V和Ni作为原油催化裂化过程中的有害金属元素,会降低催化剂的活性,严重时会导致催化剂中毒,会严重腐蚀设备,在精炼之前必须对原油中的V和Ni进行脱除处理。V和Ni具有致突变性和致癌性,识别或监测原油中V和Ni进入环境的潜在危险变得越来越重要,对原油中V和Ni的含量进行高灵敏精准测定具有重要意义。采用电感耦合等离子体串联质谱(ICP-MS/MS)测定原油中V和Ni的新策略。原油样品经航空煤油简单稀释后直接采用ICP-MS/MS进行分析,针对V和Ni受到的质谱干扰,在MS/MS模式下,采用由NH_(3)/He(He为缓冲气)和H_(2)组成的反应气混合物(NH_(3)/He/H_(2))作为反应气,基于V^(+)与NH_(3)/He/H_(2)不发生反应,而V^(+)的干扰离子与NH_(3)/He/H_(2)发生反应,采用原位质量法消除干扰,选择V^(+)进行测定;基于Ni^(+)与NH_(3)/He/H_(2)发生反应,采用质量转移法消除干扰,选择无干扰团簇离子Ni(NH_(3))_(3)^(+)进行测定。通过与NH_(3)/He反应模式进行对比研究发现,对于V的测定,加入H_(2)为反应气能快速去除氩基离子的干扰,并能协同NH_(3)消除氧化物离子的干扰;对于Ni的测定,加入H_(2)为反应气能促进全氢加合物(-NH_(3))的形成,从而提高生成Ni(NH_(3))_(3)^(+)的产率。在NH_(3)/He/H_(2)反应模式下,V和Ni的背景等效浓度(BEC)更低,Ni的灵敏度更高,V和Ni的检出限(LOD)分别低至0.83和3.76 ng·kg^(-1),定量限(LOQ)分别为2.77和12.5 ng·kg^(-1)。通过分析标准参考物质NIST SRM 1634c并进行加标回收实验评价方法的准确度和精密度,结果显示,方法的测定结果与标准参考物质的认证值基本一致,V和Ni的加标回收率分别为97.7%和103%,相对标准偏差(RSD)分别为1.8%和1.9%。所建立的分析方法避免了繁琐的样品预处理过程,具有操作简单快速、灵敏度高、准确度和精密度好的特点,适用于原油中V和Ni的检测,能为原油深加工中V和Ni的脱除提供理论依据。

关键词：原油电感耦合等离子体串联质谱钒(V) 镍(Ni) 氨气/氦气/氢气(NH_(3)/He/H_(2))