DEVELOPMENT OF ON-BOARD COSMIC DUST DETECTOR

这项研究的主要目的是研制将于1998年7月发射的ISAS(空间与宇航科学研究所)行星B上的宇宙尘埃计数器MDC(火星尘埃计数器)。该MDC-PB是1990年1月发射的技术实验卫星HITEN(缪斯-B)机载MDC(慕尼黑粉尘计数器)的直接继承者。MDC-HITEN在其三年的任务寿命中取得了几项科学成果。这种MDC-HITEN的主要弱点是其145度的低角度分辨率。这项助学金旨在提高角分辨率。在PLANET-B项目的初始阶段，MDC-PB的质量被限制在500克。在原型模型和工程模型的构建过程中，我们将这个质量极限提高到了730g，在原有的电子和离子通道的基础上增加了第三个中性通道。利用Van-de-Graaf电测仪进行的定标实验证明，提高了角分辨率和信噪比德国海德堡Max-Planck核物理研究所的更多自动尘埃加速器。对于这一MDC-PB项目，日本科学家从最早阶段就参与了设计、施工和校准实验。东京大学的佐佐木教授被提名为日本科学家的PI(首席调查员)，大桥被提名为首席工程师，而日本科学家的德国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，我们提出了几项关于未来日本行星和小行星任务中使用新型TOF尘埃探测器的建议。我们无法突破选择，但我们正在为这款TOF粉尘探测器的开发继续进行基础实验。此外，我们还在东海村东京大学核科学技术研究中心HIT(高通量辐照设备)建造尘埃加速器。这是世界上第三台尘埃加速器。我们正逐步在宇宙尘埃原位测量领域进行尝试。较少

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