排序方式: 共有40条查询结果,搜索用时 31 毫秒
31.
32.
1992年经过全所同志的艰苦努力,在高能物理基础研究、工程技术发展研究和应用技术开发等方面取得了丰硕的成果.“τ轻子质量的精确测定结果”被评为1992年全国十大科技成就.“π介子与原子核相互作用的理论研究”、“48Ca双β衰变的实验研究”均获中国科学院自然科学二等奖;“高能碰撞中的统计与几何性质”获院自然科学三等奖. 相似文献
33.
加速器真空系统的主要作用是减小电子束在传输过程中的束流损失以及满足加速器部件的真空绝缘要求。神龙一号真空系统研制是在理论分析和实验结果的基础上,就真空系统如何配置、真空梯度和漏率选择等方面的问题进行研究,并在满足加速器物理需求的前提下,选择最有效的真空系统设计方案。神龙一号真空系统采用1台抽速为1200L/s的罗茨-滑阀泵机组作为前级,采用43台抽速为400~500L/s的涡轮分子泵作为主泵,涡轮分子泵沿束线均匀分布。目前,神龙一号在开机1h以内,系统真空度达到5×10-4Pa,真空系统运行稳定可靠,满足设计要求。 相似文献
34.
35.
36.
37.
38.
39.
The spectral radiance of vacuum ultraviolet (UV) target is of crucial significance to plenty of researches including deep space exploration and spacecraft damage test. Two types of test systems and methods for vacuum UV light sources were studied. Through the research of test method for vacuum UV spectral radiance, a corresponding test system was developed, which included vacuum UV standard light source, optical imaging system, light splitting module, vacuum UV detector module, vacuum chamber and data processing system. According to the direct measurement method and the comparative method, the spectral radiance of deuterium lamps was tested and analyzed, the influencing factors and the relative index error of vacuum UV spectral radiance were discussed, and the accurate measurement of vacuum UV spectral radiance in the five wavelength ranges of 121.2 nm, 135.6 nm, 160 nm, 180 nm, 200 nm at 0.01 μW/cm2·nm·sr~1 μW/ cm2·nm·sr was realized. The repeatability of the measurement is 0.001 34, which shows that the proposed test system can realize the test of vacuum UV signal. © 2022 Editorial office of Journal of Applied Optics. All rights reserved. 相似文献
40.
采用瞬态受激旋转拉曼散射(SRRS)模型,并充分考虑非线性介质分子密度、增益系数、泵浦光的衰减、斯托克斯光的非线性放大以及初始的随机斯托克斯散射场等因素,研究了空气真空度对强紫外激光在空气长程传输过程中产生的SRRS效应的影响。结果表明,真空度对SRRS效应的阈值传输距离和Stokes光的转换效率的影响较大,随着真空度的提高,Stokes光的转换效率将降低,产生SRRS效应的阈值传输距离将增大。因此,在实际工作中,可以采用真空度较高的激光传输环境来抑制SRRS效应的产生,以减小入射泵浦光能量的衰减并提高光束质量。 相似文献