DEVELOPMENT OF ON-BOARD COSMIC DUST DETECTOR

这项研究的主要目的是研制宇宙尘埃计数器MDC（火星尘埃计数器），该计数器将装在定于1998年7月发射的ISAS（空间和航天科学研究所）PLANET-B上。该MDC-PB是1990年1月发射的技术实验卫星HITEN（Muses-B）上的MDC（慕尼黑尘埃计数器）的直接继承者。MDC-HITEN在其三年的使命寿命中获得了一些科学成果。MDC-HITEN的主要缺点是其145度的低角分辨率。这项补助金的目的是提高角分辨率。在PLANET-B项目的初始阶段，MDC-PB的质量被限制在500 g。在原型模型和工程模型的构建过程中，这个质量限制增加到730 g，我们在原有的电子和离子通道之外增加了第三个中性通道。利用Van-de-Graaf静电场进行的标定实验证实了角分辨率和信噪比的提高 ...更多信息 德国海德堡马克斯-普朗克核物理研究所的尘埃加速器。对于MDC-PB项目，日本科学家从最早阶段就参与了设计，建造和校准实验。东京大学的Sasaki教授被任命为PI（首席研究员），Ohashi被任命为日本科学家的首席工程师，德国科学家的同行是慕尼黑科技大学Fachgebiet Raumfahrttechnich的Igenbergs教授和Muenzenmayr博士。通过这项国际联合研究，我们提交了几项新的TOF尘埃探测器的提案，用于未来日本的行星和小行星任务。我们无法突破选择，但我们正在继续进行TOF尘埃探测器开发的基础实验。此外，我们还在东海村的东京大学核科学技术研究中心HIT（高通量辐照设施）建造尘埃加速器。这是世界上第三个尘埃加速器。我们在宇宙尘埃的现场测量方面也逐渐积累了经验。少

The main purpose of this research is to develop the cosmic dust counter MDC (Mars Dust Counter) on-board of ISAS (Institute of Space and Astronautical Science) PLANET-B to be launched July 1998. This MDC-PB is a direct successor of the MDC (Munich Dust Counter) on-board of Technical Experimental Satellite HITEN (Muses-B) launched January 1990. MDC-HITEN got several scientific results during its three years of mission life. The main weak point of this MDC-HITEN was its low angular resolution of 145 degrees. This grant-in-aid was aimed to improve the angular resolution. In the initial phase of the PLANET-B project, mass of the MDC-PB was restricted to 500g. During the prototype model and engineering model construction, this mass limit was increased up to 730g, that we have added the third neutral channel in addition to original electron and ion channels. Improvement of angular resolution and signal to noise ratio was confirmed by the calibration experiment using an Van-de-Graaf electrost … More atic dust accelerator at the Max-Planck Institute for Nuclear Physics, Heidelberg Germany. For this MDC-PB project, Japanese scientists have participated in the design, construction and calibration experiment from its earliest stage. Prof. Sasaki at University of Tokyo was nominated as PI (Principal Investigator) and Ohashi as Principal Engineer of the Japanese scientists, whose German counterparts are Prof. Igenbergs and Dr. Muenzenmayr of the Fachgebiet Raumfahrttechnich, Techische Universtaet Muenchen.Through this international joint research, we have submitted several proposals for new TOF dust detector to be on-board future Japanese planetary and asteroid missions. We could not break through selection, but we are continuing basic experiments for this TOF dust detector development. All the more, we are also constructing dust accelerator at HIT (High Fluence Irradiation Facility), Research Center for Nuclear Science and Technologies of the University of Tokyo in Tokai-mura village. This is the third dust accelerator in the world. We are gradually getting exprienced in the field of cosmic dust in-situ measurement. Less