Time profile of cosmic radiation exposure during the EXPOSE-E mission: the R3DE instrument

The aim of this paper is to present the time profile of cosmic radiation exposure obtained by the Radiation Risk Radiometer-Dosimeter during the EXPOSE-E mission in the European Technology Exposure Facility on the International Space Station's Columbus module. Another aim is to make the obtained results available to other EXPOSE-E teams for use in their data analysis. Radiation Risk Radiometer-Dosimeter is a low-mass and small-dimension automatic device that measures solar radiation in four channels and cosmic ionizing radiation as well. The main results of the present study include the following: (1) three different radiation sources were detected and quantified-galactic cosmic rays (GCR), energetic protons from the South Atlantic Anomaly (SAA) region of the inner radiation belt, and energetic electrons from the outer radiation belt (ORB); (2) the highest daily averaged absorbed dose rate of 426 μGy d(-1) came from SAA protons; (3) GCR delivered a much smaller daily absorbed dose rate of 91.1 μGy d(-1), and the ORB source delivered only 8.6 μGy d(-1). The analysis of the UV and temperature data is a subject of another article (Schuster et al., 2012 ).     

火箭发动机纤维增强金属壳体的结构分析

本文提出了应用有限元法和光弹技术进行火箭发动机纤维增强金属壳体结构应力分析的方法。这些方法使得能够对初始缠绕工艺过程、惯性力和点火以后的升压过程等进行受力分析。为了分析外缠纤维和飞行载荷的复杂效应,引入了某些简化和假设。对于一些典型发动机,给出了两种方法的结果比较。     

热流校准的不确定度——美国热流计的校准

AEDC(Arnold Engineering Derelopment Center)负责对热流传感器进行校准。本文介绍有关该校准不确定度的研究工作和研究结果。校准总的不确定度是综合AEDC和NBS(美国国家标准局)各自作的几组校准数据求得的。第一组数据是按块式卡计标准校准六个热流传感器得到的,块式卡计和六个热流传感器都是AEDC制造的。校验中采用九支(1kW/支)石英灯组成辐射热源。由这些校准数据计算六个传感器中每个传感器的精度。此六个传感器送到NBS Fire研究中心(华盛顿)进行标准复校。第二组校准数据取自这些复校试验。因此,可以说是按NBS热流标准进行了标准传递。NBS也采用辐射热源,也用AEDC类似的步骤进行校准。比较AEDC和NBS各自获得的数据,确定每一传感器的偏差值。综合此偏差和精度两个数据,计算每个传感器的总不确定度。六个传感器算出的平均不确定度是±3％。     

MX导弹喷管用先进材料评论 Ⅲ 第二级喷管的先进材料

这是评论MX导弹喷管先进材料的连载第三篇文章。根据空军系统司令部的空间导弹系统组织的F07401—73—C—04223合同,航空喷气固体推进公司进行了本文所述的工作。计划包括喷管设计的选择和要求满足MX ADP(Advanced DeveloPment Program)目的的有关技术。本文概述了材料筛选试验、阐述选择材料的原则、所选择材料的性能、缩比尺寸喷管点火试验的结果和用于全尺寸试验的石墨喷管部件的说明等。     

Microwave Brightness Temperature and Lunar Soil Dielectric Property Retrieve

Among many scientific objectives of lunar exploration, investigations on lunar soil become more and more attractive to the scientists duo to the existence of abundant 3He and ilmenite in the lunar soil and their possible utilization. Although the soil composition determination on the lunar surface is available by visible light spectrometer,γ/X-ray spectrometer etc, the evaluations on the total reserves of 3He and ilmenite in the lunar deep and on the thickness of the lunar soil are still impossible so far. In this paper, the authors first give a rough analysis of the microwave brightness temperature images of the lunar disc observed using the NRAO 12 Meter Telescope and Siberian Solar Radio Telescope; then introduce our researches on the microwave dielectric properties of lunar soil simulators; finally, discuss some basic relations between the microwave brightness temperature and lunar soil properties.     

端羧基聚丁二烯(CTPB)推进剂的进展

用作优良粘合剂组份的端羧基聚丁二稀聚合物,由于其均匀的分子结构和化学反应性提供给推进剂良好的力学性能。本文是关于新的端羧基聚丁二稀和推进剂的进展。作者们共同研究的新CTPB 已从工业基地日本合成橡胶公司推荐给推进剂制造者。对日本合成橡胶公司的端羧基聚丁二稀的特性,特别是关于分子结构和粘合剂性能方面已进行了试验研究。     

体波谐振晶片加速度灵敏度的测定

本文叙述了测定直接工作在微波频率的高次泛音钇铝石榴石(YAG)体波谐振晶片的加速度灵敏度的近似理论。高次泛音声体波谐振器比用其它方法更容易实现低相位噪声倍频微波源,所需硬件也少得多。在参考文献[1]中详细介绍了振荡器的设计及测试。本文通过分析及实验对振动灵敏度作了论述。在静态和振动状两种状态下,对钇铝石榴石(YAG)体波谐振器件进行了电测量。将约为4×10~(-11)/G的加速度灵敏度的计算值(K)与约为1.28×10~(-11)/G的测试值进行了比较。体波谐振的实测值约比典型的三类AT切石英晶体对运动的灵敏度要低两个数级量。