共查询到20条相似文献,搜索用时 109 毫秒
1.
本文介绍了一个装置,该装置把微通道板作为成像光谱探测器应用于真空紫外光谱仪中,可清晰地观察和拍摄到60~190nm之间几种气体元素的各条原子谱线;本文还分析了该探测装置作为探测器的主要性能,讨论了进一步进行此项研究工作的方向. 相似文献
2.
由于等离子体物理、空间物理、光化学以及激光器的发展,需要在紫外和真空紫外光谱区进行精确的辐射测量。和其他光谱区一样,根据不同的情况,可以使用标准光源或标准探测器。紫外和真空紫外探测器标准,可以用绝对温差电偶和电离室技术,并已发展了相应的传递探测器。 相似文献
3.
基于合肥国家同步辐射实验室(NSRL)低能量真空紫外光源的特点,研制了耦合式刀片低能束流位置探测器,用于在线监测波荡器辐射出的低能量真空紫外相干光源的稳定性.探测器采用V型耦合式刀片作为探针,基于错位安装、倾斜嵌入被测光束边缘和直流偏压捕集自由电子等技术有效增强光电效应,提高探针的响应灵敏度和探测器监测精度.介绍了耦合式刀片低能束流位置探测器的结构特点、探测原理和性能测试,在线监测了NSRL波荡器光源的稳定性,获得了一系列有价值的试验数据.结果表明:该探测器能完成NSRL-0.8GeV低能储存环上插入件光源的在线监测,满足对改造后的新光源各插入件辐射光束位置稳定监测的要求. 相似文献
4.
介绍了一种可用于120~300 nm激发的荧光粉发射光谱,激发光谱和相对亮度测量的紫外-真空紫外单色仪/荧光光谱仪装置.发射光谱的测量范围为380~780 nm.该仪器由真空紫外光源、真空紫外光谱仪、样品室、真空泵、平像场荧光光谱仪、光电倍增管等部分组成.真空紫外光源采用Cathodeon公司的30 W氘灯,真空紫外光谱仪为美国ActonResearch公司的VM-502 0.2 m单色仪,CCD探测器采用日本滨松公司的S3921型自扫描二极管阵列.测试结果表明该仪器的光谱重复性和准确性好于1%,样品色坐标的重复性和准确性均好于0.001. 相似文献
5.
回顾了PDP荧光粉的基本原理,阐述了余辉测试的重要性,详细介绍了PDP用真空紫外荧光粉余辉测试系统的各个组成部分及其工作原理,并根据测得数据绘出了余辉特性曲线,最后对该系统的性能进行了评估。 相似文献
6.
7.
首先分析了热释电探测器工作原理,然后利用PSPICE的ABM(analog behavioral modeling)功能对PMNT(钛酸铅一铌镁酸铅)热释电紫外电定标探测器进行仿真模拟,建立其等效电路模型。该模型可以模拟PMNT热释电紫外电定标探测器热学和电学特性的瞬态响应和频率响应。将等效电路模型与放大电路相接,可以模拟热释电探测器系统,分析不同条件下探测器的响应特性,从而可以提高热释电探测器系统的性能,进而为紫外电定标奠定基础。 相似文献
8.
9.
10.
11.
Seon CR Choi SH Cheon MS Pak S Lee HG Biel W Barnsley R 《The Review of scientific instruments》2010,81(10):10E508
A vacuum ultraviolet (VUV) spectrometer of a five-channel spectral system is designed for ITER main plasma impurity measurement. To develop and verify the system design, a two-channel prototype system is fabricated with No. 3 (14.4-31.8 nm) and No. 4 (29.0-60.0 nm) among the five channels. The optical system consists of a collimating mirror to collect the light from source to slit, two holographic diffraction gratings with toroidal geometry, and two different electronic detectors. For the test of the prototype system, a hollow cathode lamp is used as a light source. To find the appropriate detector for ITER VUV system, two kinds of detectors of the back-illuminated charge-coupled device and the microchannel plate electron multiplier are tested, and their performance has been investigated. 相似文献
12.
We present the realization of high-resolution holographic microscopy using the original Gabor geometry and imaging with radiation in the vacuum-ultraviolet (VUV) spectral region. Synchrotron VUV radiation with a wavelength of 13.8 nm was focused on a small pinhole generating a highly divergent light cone suitable for digital in-line holography. Objects of different thickness and materials have been used to test the imaging properties of holographic microscopy in the VUV wavelength range. The effective numerical aperture was limited by the illuminated area of the detector, yielding a theoretical resolution below 1 microm and an experimental one of approximately 1 microm. 相似文献
13.
Nave G Sansonetti CJ Szabo CI Curry JJ Smillie DG 《The Review of scientific instruments》2011,82(1):013107
We describe the use of phosphor image plates for recording spectra in the vacuum ultraviolet (VUV) and for determining accurate relative and absolute intensities. We investigated the spatial uniformity, noise, linearity of the response to VUV light, fading characteristics, saturation characteristics, reproducibility of the image when scanned multiple times, and long-term stability and lifetime of the plates. We find that the plates have a linear intensity response with a dynamic range of more than 4 orders of magnitude. We also show that they have potential as an absolute detector for VUV radiation. 相似文献
14.
在上海光源上设计了一条光子能量覆盖5~140 eV的高通量、高分辨的真空紫外角分辨光电子能谱束线。本光束线采用准周期椭圆偏振波荡器光源,其周期长度为0.32 m,周期数为14。单色仪采用Dragon型,分为覆盖5~32 eV的低能分支和25~140 eV的高能分支。计算表明,当入射/出射狭缝开启宽度为5/5 μm时,在整个能量扫描范围内,单色仪分辨率可以高达15 000~100 000,光学元件的面型误差对分辨率的影响最大。通量计算显示,样品处s偏振光子通量高达~1012 phs/s。Shadow追迹模拟结果表明,设计的光束线具有很好的聚焦特性。 相似文献
15.
计量线高次谐波的定量研究 总被引:1,自引:2,他引:1
采用自制的840/mm金膜自支撑透射光栅和美国IRD公司的AXUV100G光电二极管探测器,定量研究了光谱辐射标准和计量光束线在5~140 nm波段的高次谐波。研究了Al、Si3N4和Zr滤片在不同能量范围对高次谐波的抑制作用,给出了实验数据和曲线。实验结果显示:在5~15 nm波段,不用任何滤片高次谐波的信号强度<7%;在5~34 nm波段,适当的选用Al、Si3N4和Zr滤片可有效地抑制高次谐波,将高次谐波占基波的积分信号强度比例控制在<14%,经探测器的量子效率修正后高次谐波的百分比在6.5%以内。在经过MgF2窗滤波的115~140 nm波段,高次谐波的衍射峰几乎完全被抑制。这一研究为软X射线和极紫外的光谱计量、探测器定标和光学元件性能测试奠定了基础。 相似文献
16.
研制了一台测定真空紫外反射率的仪器.在真空紫外区可测量各种反射元件在不同入射角下的反射率.用壁稳氩弧光源在100—200um区对Al十MgF2薄膜和CVD法制备的SiC镜的反射率进行了测定.并与Al膜的理论反射率曲线做了比较. 相似文献
17.
日本东北大学科学计测研究所波岡武教授(Prof. T. Namioka)领导的光学与光谱学研究室近年来在真空紫外—软X射线波段光谱仪器光学设计与评价,光栅刻划,非周期性多层膜制备,等离子体光谱学和激光光谱学方面取得了许多丰硕的研究成果,在日本国内外有很大影响。本文对此作一简要介绍和评述。 相似文献
18.
19.
Vacuum ultraviolet (VUV) photoionization mass spectrometry of antifungal drug terbinafine was investigated with IR laser desorption/VUV photoionization mass spectrometry (IR LD/VUV PIMS). By varying the VUV photon energy for ionization, the mass spectra of terbinafine at various photon energies were measured, and the formation pathways of dominant fragment ions were discussed. 相似文献
20.
Daerr H Kohler M Sahling P Tippenhauer S Arabi-Hashemi A Becker C Sengstock K Kalinowski MB 《The Review of scientific instruments》2011,82(7):073106
We report on a new design of a vacuum ultra violet (VUV) lamp for direct optical excitation of high laying atomic states, e.g., for excitation of metastable rare gas atoms. The lamp can be directly mounted to ultra-high vacuum vessels (p ≤ 10(-10)mbar). It is driven by a 2.45 GHz microwave source. For optimum operation, it requires powers of ~20 W. The VUV light is transmitted through a magnesium fluoride window, which is known to have a decreasing transmittance for VUV photons with time. In our special setup, after a run-time of the VUV lamp of 550 h the detected signal continuously decreased to 25% of its initial value. This corresponds to a lifetime increase of two orders of magnitude compared to previous setups or commercial lamps. 相似文献