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一、引言 在现行的托卡马克实验中,辐射损失和中性粒子损失是高温等离子体能量损失的主要通道之一。为了更好地了解托卡马克等离子体中能量平衡、辐射损失以及这些损失随等离子体参数的变化;了解等离子体中杂质含量和杂质输运以及等离子体与器壁的相互作用,辐射能量损失的时间特性、空间分布的测量显得很有必要。为 相似文献
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介绍供观测银心和银道面红外辐射用的快速扫描远红外光度计,光度计的主要元件是用液氦致冷的锗测辐射热探测器,本文还介绍了光度计的总体考虑,各部件的结构,定标设备和观测结果。 相似文献
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A method to pattern infrared-absorbing gold black by conventional photolithography and lift-off is described. A photo-resist pattern is developed on a substrate by standard photolithography. Gold black is deposited over the whole by thermal evaporation in an inert gas at ∼1 Torr. SiO2 is then deposited as a protection layer by electron beam evaporation. Lift-off proceeds by dissolving the photoresist in acetone. The resulting sub-millimeter size gold black patterns that remain on the substrate retain high infrared absorption out to ∼5 μm wavelength and exhibit good mechanical stability. This technique allows selective application of gold black coatings to the pixels of thermal infrared imaging array detectors. 相似文献
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《Current Applied Physics》2018,18(4):461-468
Based on the two-dimensional radiation images obtained by an infrared imaging video bolometer (IRVB) with tangential view, the two dimensional radiation profiles of plasmas in KSTAR were reconstructed. The IRVB installed on KSTAR has a tangential view of the plasma, and thus tomographic reconstruction of the raw images of radiation profiles was performed to remove the chord-integration effect by using a tomographic reconstruction code based on the Phillips-Tikhonov algorithm. Phantom reconstruction tests with various synthetic images were carried out to validate the accuracy of the reconstruction results. It is found that hollow radiation phantoms with strong divertor radiation were reconstructed with high accuracy. Furthermore, the effects of the number of channels of the IR camera, and the number of pixels of the plasma and of the IRVB on reconstruction performance are studied with phantom tests. Two-dimensionally reconstructed images of KSTAR plasmas demonstrated that radiation loss at the plasma edge and near the divertor region increased significantly after gaseous impurity injection. The total radiated power was up to 1.2 MW at the disruption, which was 40% of the NBI power. After argon and krypton gas injection, total radiated power was increased by 325 kW and 180 kW, respectively. 相似文献
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国外长波红外焦平面列阵现状 总被引:5,自引:0,他引:5
文中介绍了长波工外焦平面列阵的国外进展,这些列阵包括碲镉汞光电二极管、肖特基势垒器件、砷化镓/砷铝镓多量子阱光导体、高温超导体以及室温工作的焦平面列阵,其中非制冷的混合式热释电陶瓷和单片式的微型测辐射热计焦平面列阵已进入批理生产阶段。 相似文献
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高温超导红外探测器对1—1000μm波段的光谱响应 总被引:2,自引:2,他引:0
采用YBaCuO高温超导薄膜,制成芯片为蛇形的Tc超导Bolometer,对1 ̄1000μm波段的光谱响应进行了测量,本文报道了实际测量结果,表明高温超导红外探测器在红外-毫米波段有应用前景。 相似文献
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Ruifeng Yue Liang Dong Litian Liu 《International Journal of Infrared and Millimeter Waves》2006,27(7):995-1003
This paper presents a monolithic uncooled 8 × 8 bolometer array with polycrystalline silicon-germanium (poly-SiGe) thermistors
as active elements. The poly-SiGe films are deposited by ultrahigh vacuum vapor deposition (UHV/CVD) system and the dependence
of the temperature coefficient of resistance (TCR) on annealing temperature has been investigated. To decrease the thermal
conductance of the bolometer, the poly-SiGe thermistor was formed on a four leg suspended microbridge. The improved porous
silicon micromachining techniques described here enable the integration of the bolometer array with the MOS readout circuitry.
The measurements and calculations show that the mean responsivity is 1.07 × 104 V/W with an uncorrected uniformity of 10.5% and a thermal response time of 10.5 ms, and the detectivity of 3.75 × 108 cm Hz1/2/W is achieved at a chopping frequency of 30 Hz and a bias voltage of 5 V. 相似文献
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本文叙述了在器壁碳化、抽气孔栏、偏压电极、送杂质气体、ECRH加热和弹丸注入等实验条件下用多道辐射热探测器(Bolometer)阵列测得的HL-1等离子体辐射损失,并给出了辐射损失的时空分布图。 相似文献