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hot filament
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     An infrared generator in the hot- filament CVD chamber was designed with the main wavelength 3.5μ m, which was right situated in the stretch vibration absorption peak of the C- H bond in methane molecule and H- H bond in hydrogen molecule.
     在传统热丝 CVD腔中设置一套红外线发 生器,中心波长 3.5μ m,处于氢与甲烷分子拉伸振动吸收峰位置。
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     An improved hot- filament CVD system was developed to deposit diamond films.
     采用一种改进的热丝 CVD系统沉积金刚石膜。
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  相似匹配句对
     HOT
     热报!
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     HOT NEWS
     热点新闻
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     Thermoplastic Filament Winding
     热塑性树脂基体纤维缠绕工艺
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     What is the "Current Filament"?
     什么是“电流细丝”现象?
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     Boron filament and it's application
     硼纤维及其应用
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In this paper a microwave standard noise source which produces noise by healing a metal filament is described. Its design and the measurement of effective noise tem- perature are discussed in detail. A new method for estimating the effect of losses of glass envelope and tuning elements on-the effective noise temperature is presented. The effect of the cold end of the hot filament is also quantitatively corrected. The results of the experiments and the error analysis are given. This noise source can give...

In this paper a microwave standard noise source which produces noise by healing a metal filament is described. Its design and the measurement of effective noise tem- perature are discussed in detail. A new method for estimating the effect of losses of glass envelope and tuning elements on-the effective noise temperature is presented. The effect of the cold end of the hot filament is also quantitatively corrected. The results of the experiments and the error analysis are given. This noise source can give a standard noise with an excess noise ratio up to & db., the maxium possible error being ±0.2 db... Neon-filled. gareous discharge noise tubes are calibrated by using this hot filament stand4rd noise source A new calibrating method is given. The excess noise ratio obtained by calibrating a S-band neon-filled noise the is 18. 58 db., with a maxium posible error ±0.4 db..

本文介绍了一种用加热金属丝来产生噪声的微波标准噪声源。对其设计与有效噪声 温度的量测进行了较详细的讨论。提出了一种量测玻壳和调谐元件损耗对有效噪声温度 影响的方法。对热丝冷端的影响进行了定量修正。 给出了实验结果和误差分析。表明这种噪声源可给出超额噪声比达8分贝的标准噪 声,误差不大于±0.23分贝。 用这热丝式标准噪声源对充氮气体放电噪声管进行了校准。讨论了校准方法,给出 了一种较好的方案,对s波段充氖管校准所得超额噪声比为18.58db,误差不大于 ±0.4 db。

A hot surface ionization detector is described in this paper. The hot surfaces in the detector are made of tungsten filaments and the ion collector is a tungsten wire grid around the hot filaments. To prevent alkali metal vapor from condensing on the wires, the tungsten wires are heated to 400℃. The insulator among 4 electrodes of the detector is inserted in a enclosed metal envelope. By means of a labyrinth packing, electric conducting layer can not form on the insulator. The detector...

A hot surface ionization detector is described in this paper. The hot surfaces in the detector are made of tungsten filaments and the ion collector is a tungsten wire grid around the hot filaments. To prevent alkali metal vapor from condensing on the wires, the tungsten wires are heated to 400℃. The insulator among 4 electrodes of the detector is inserted in a enclosed metal envelope. By means of a labyrinth packing, electric conducting layer can not form on the insulator. The detector has been applied to quick measurement of the density of an alkali metal vapor jet. Some experimental results of the detector for a supersonic lithium vapor jet are given.

本文描述的热表面电离探测计适用于碱金属蒸气流密度的快速测量。同时给出了探测计在超声速锂蒸气流靶中的实验结果。

Diamonds were grown on synthetic diamond substrates froma mixed source material of methane and hydrogen by the hot filament CVDmethod. Eptaxial growth on the (100) face of diamond substrates and po-lycrystalline layer growth on the (111) and (110) faces were observed.

本文采用热灯丝化学气相沉积法,以甲烷和氢气为原料气体,在用高温高压法合成的金刚石的(100)面上外延生长出金刚石,在(110)面和(111)面上生长出多晶金刚石微粒。

 
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