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phosphor screen
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  荧光屏
     The half intensity line width of the 3 inch YAG phosphor screen can be 85 μm at a cathode current of 0 5 mA. The red,green and blue YAG phosphor screens reach the luminance of 6 2×10 4,1 4×10 5 and 8 3×10 3 cd/m 2 at a current of 1 0 mA and an anode voltage of 29 kV,respectively.
     在 0 5mA阴极电流下 ,3英寸YAG荧光屏5 0 %光斑尺寸仅 85 μm ,在 1 0mA阴极电流和 2 9kV阳极电压下 ,红、绿、蓝的亮度分别为 6 2× 10 4,1 4× 10 5 ,8 3× 10 3cd/m2 。
短句来源
     Development and analysis of monochrome FED phosphor screen
     单色FED荧光屏的研制与分析
短句来源
     High-Luminance and High-Resolution YAG Phosphor Screen in Projection Tube
     投影管中高亮度高分辨率YAG荧光屏的研制
短句来源
     The ultraviolet image intensifier which adopts RbTe solar--blinded photo-athode, proximity focused construct, two microchannel plates used for intensify, P--20 phosphor screen and 25 mm/25 mm effective diameter is introduced.
     研究了采用碲铷(日盲)光电阴极、近贴聚焦、二块微通道板(MCP)、 Y-20荧光屏、25/25 mm有效直径紫外像增强管。
短句来源
     A new kind of MAO phosphor screen has been successfully developed for the 12.7 cm projection cathode ray tube (CRT) by depositing phosphor powder on MAO faceplate with centrifugal sedimentation technique.
     采用离心沉淀法将红、绿、蓝荧光粉分别沉淀在无色透明多晶MAO衬底材料上制作的荧光屏应用于新型红、绿、蓝三色CRT投影管中,该投影管的对角线尺寸为12.7 cm。
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  “phosphor screen”译为未确定词的双语例句
     On the green YAG CRT phosphor screen, thediameter of beam spot is near 0. 065-0. 080cm at cathode currents of 0. 5~ 1. 0mA, and the resolution ismore than 1400 TVL.
     在YAG绿色投影管中,当阴极电流为0,5~1mA时,其光点直径为0.065~0.08mm,该投影阴极射线管分辨率大于1400电视线。
短句来源
     Methods The 125 I rhpro UK concentrations of plasma were calculated according to optical density on the storage phosphor screen exposed to polyacrylamide gel containing 125 I rhpro UK.
     方法 将含12 5I rhpro UK样品的聚丙烯酰胺凝胶贴于储存磷光质屏上曝光 ,根据储存磷光质屏上检出的吸收度值计算12 5I rhpro UK浓度。
短句来源
     Assaying ~(125)I rhpro UK Concentration of Plasma in Rabbits with Storage Phosphor Screen Autoradiography
     储存磷光质屏放射自显影在测定兔血浆中~(125)I-重组人尿激酶原浓度的应用
短句来源
     The paper reports the experimental result of a kind of phosphor screen (Gd2O2S:Tb) which can be used to reinforce image.
     报道了一种用于像增强的闪烁屏(Gd2O2S:Tb)特性的实验研究结果:其光产额约为9×104/MeV;
短句来源
     Aim The method of assaying 125 I rhpro UK concentration of plasma in rabbits with combination of storage phosphor screen autoradiography and PAGE were evaluated in this paper.
     目的 探讨储存磷光质屏放射自显影结合聚丙烯酰胺凝胶电泳测定兔血中12 5I 重组人尿激酶原 (12 5I rhpro UK)浓度的方法。
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  相似匹配句对
     A phosphor screen for intensifying image
     一种像增强屏特性的研究
短句来源
     The phosphor in PDPs is coated by screen printing method.
     PDP中的荧光粉是通过丝网印刷的方法涂敷的。
短句来源
     JIG SCREEN
     跳汰筛
短句来源
     On literature on Screen
     影视化接受:文学不能承受之轻
短句来源
     Phosphor Materials of Teletron
     显像管磷光体材料
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  phosphor screen
Electron bubbles are trapped on the lines, and then extracted through the free surface and accelerated into a phosphor screen.
      
[14C]-radiolabel incorporation is revealed with a standard phosphoimager scanner, after exposure of the glycochip to a phosphor screen and detection.
      
Results showed that most image quality parameters (CDG, MTF, DQE) depend strongly on phosphor screen thickness.
      
For these calculations we have taken into account the real spatial distribution of the light emitted from a phosphor screen which diverges from the Lambert law depending on the characteristics and the structure of the screen.
      
The emission spectrum of a ZnCdS: Ag phosphor screen excited by an electron beam was measured for different screen's thickness.
      
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A new method of x-ray picosecond framing photography has been proposed for the studies of laser prodn(?)d plasma fhis method uses a image tube in which there are shutter plareseparating (?)ouble-slits aperture and compensate plate.Two discrete images of the plasnre are (?)med on the photocathode of the tube by doublepin-holes.Two (?) resutted are deflected by the shutter pkte at the back of the cross over point, two pairsof compensate plates are used to separate the images and eliminate image smear on the phosphor...

A new method of x-ray picosecond framing photography has been proposed for the studies of laser prodn(?)d plasma fhis method uses a image tube in which there are shutter plareseparating (?)ouble-slits aperture and compensate plate.Two discrete images of the plasnre are (?)med on the photocathode of the tube by doublepin-holes.Two (?) resutted are deflected by the shutter pkte at the back of the cross over point, two pairsof compensate plates are used to separate the images and eliminate image smear on the phosphor screen. Four frame images can be got by this method.We have designed a new image convert tube for the method. The tube is 300mm in length and 88mm in diameter The effective area of the photocathode and the screen are 20mm and 40mm in diameter respectively:The magnification of the tube is Ⅺ,5. Computer simulation showed that for 5 ×5mm format image (on photocathode)and 100 picosecond exposure time for each frame image, 10lp/mm dynamic spatial resolution can be obtained.The rate of the ramp voltage applied on the shutter plate and compensate plate shoud be 4.1 kv/ns which is not difficult to produce.The image convert tube has been manufactured in the demountable type,CsI was used as the photocathode with Formvar substrate,making the camera sensitive to soft x-ray and the cathode area large enough, The electron images were intensified by the MCP in front of the screen.static resolution of 201p/mm was measured with a d.c.x-ray source Four frame quasi-static images on the screen with repetitive exposure sho-wed the reality of the new framing concept. Some preliminary dynamic experiment results have been obtained using laser producd X-ray and a Krytron tube ramp high voltage generator.

本文介绍了我们提出的一种新的实现皮秒分幅摄影的技术方案,其优点是对控制线路要求不高,给出了用计算机对此方案进行数值模拟的结果和新设计的用于这种分幅方案的变象管特性,用直流X射线源测出该变象管的静态空间分辨率为20lp/mm。用激光打靶产生的脉冲X射线测量了相机动态特性,已得到了四幅动态像,每幅曝光时间150ps,空间分辨率3lp/mm。

A 1.5MeV linear induction accelerator has been constructed in China Aca demy of Engineering Physics. This machine consists of six induction modules . four of which are connected in series by a cathode stem to drive a cold emitter diode, other two are used as a post-accelerator. The diode has a planar configuration and its emitter is made of velvet. Each module is energized by a 10.8ohm.Water-insulated Blumlein pulse forming line and all the Blumleins are charged by one Marx generator. A near-continuous array...

A 1.5MeV linear induction accelerator has been constructed in China Aca demy of Engineering Physics. This machine consists of six induction modules . four of which are connected in series by a cathode stem to drive a cold emitter diode, other two are used as a post-accelerator. The diode has a planar configuration and its emitter is made of velvet. Each module is energized by a 10.8ohm.Water-insulated Blumlein pulse forming line and all the Blumleins are charged by one Marx generator. A near-continuous array of solenoids is used to confine the beam. Initial testing on the accelerator has been completed The diode and acceleration voltages are obtained through summing the voltages of the corresponding capacitve probes. The total emitted and beam currents are measured by the resistor monitors. The peak emitter current is 8. 4kA. beam current 2.8kA. diode voltage 1 MV and acceleration voltage 0.5MV. Preliminary measurements of the beam emittance have been performed using a 1mm thick perforated brass plate as a sampling target and an aluminum-backed phosphor screen as a scintilla-tor. From these measurements, the emittance is estimated to be 70 mrad-cm. The testing is going on in order to improve the quality of the beam.

本文介绍了新近在中国工程物理研究院建成的一台直线感应加速器。这台加速器由六个250kV的加速组元构成。其中四个用于构成电子源,另外两个用作后加速。输出电子束能量为1.5MeV,束流2—3kA,束脉冲宽度90ns,束的非归—化均方根发射度70mrad-cm。

In this report we have clarified that (1) pH of PVA- phosphor slurry and UV light intensity are correlated with the penetration depth of the incident UV light into dried PVA-phosphor screen; (2) particle surface, particle shape, particle size distribution etc.are correlated with scattering of incident UV light in a dried PVA-phosphor screen;(3) mean particle sizes determine a screen weight to give an optimal screen thickness;(4) a profile of the UV light intensity, exposure dose and development...

In this report we have clarified that (1) pH of PVA- phosphor slurry and UV light intensity are correlated with the penetration depth of the incident UV light into dried PVA-phosphor screen; (2) particle surface, particle shape, particle size distribution etc.are correlated with scattering of incident UV light in a dried PVA-phosphor screen;(3) mean particle sizes determine a screen weight to give an optimal screen thickness;(4) a profile of the UV light intensity, exposure dose and development conditions are predominantly correlated with sharpness of phosphor dots or stripes.In aqueous solution amonium dichromate(AD), (NH4)2Cr2O7 hydrolyzes and several species of chromete ions:Cr2O7-2, HCrO4-2 and CrO4-2 exist in different ratious at different pH value and AD concentrations. But only HCrO4-2 ions respond on photosensitization of PVA. Fig. 1 shows the absorption spectra of aqueous solution at two pH values but the same AD concentration 2×10-4 mole per liter.The dependence of the HCrO4-1 concentration on pH value is shown in Fig. 2. The pH value must not be smaller than 7. otherwise the incident UV fight Will be totally absorbed by a thin surface layer of PVA film and no light will reach the substrate. Consequently the phosphor particles do not adhere on the substrate.Empirically it is shown that a simple maximizaton of the concentration of HCrO4-1 is not reality in screening of phosphor powder even if photoreaction of PVA(AD) resin is essential.Hence we must cosider the optical properties of PVA-phosphor screen with fhe assumption of small absorption coefficient of PVA(.AD) resin.Since the average size of phosphor particles is around 3 to 4um and the absorption coefficient of phosphor to the UV light is estimated to be 105 per cm (0.1μm depth), the UV light never penetrates through the particles. The photoreaction of PVA (AD) resin at substrate occurs mainly due to the absorption of scattered UV light by phosphor particles.The scattering in phosphor srecen increases as optical irregularity of phosphor is increased. And after baking process the dried adhesion of particles decrease as particle size is increased.Te minimum size required meets also the requirement of high optimum brightness, approximately 3 to 4um. Maximum scattering is expected with round particles.Further the distribution of particle size should be according to log-normal probability.This says that the particles are primary (i.e.no aggregated particles). Fig.6 illustrates a tool for study of screening conditions.The screen is dried after screening of PVA-phosphor slurry and is exposed by the UV light through an attenuator filter which changes its transmittance continuously from 100% to 20%.Adhesion of phosphor particles is determined from the threshold angles at which the screen defects start after development.Then we discussed the problems of optimum screening Weight per cm2, profile of UV light intensities on phosphor screen and cross contamination.

在用PVA-发光粉泥浆技术涂制电视显象管的发光屏中PVA(AD)树脂的光反应是将发光粉粘结在底板上的关键环节。包有树脂的这些颗粒组成有最佳颗粒层数的发光屏(例如,1.4层)。在发光颗粒表面散射的紫外光只有当PVA-发光粉泥浆的pH值被调到7附近时才可能到达发光颗粒层的底面。在底板上被散射紫外光的强度决定于颗粒的光学不均匀性,而这个不规则性对球形颗粒是最大。紫外光的强度及其光程断面和高质量的发光粉是制备优良发光屏的保证。

 
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