@misc{oai:repo.qst.go.jp:00065497,
 author = {kodaira, Satoshi and Umeshima, Yosuke and Yasuda, Nakahiro and Kurano, Mieko and Kawashima, Hajime and Honma, Yoshihiro and 小平 聡 and 安田 仲宏 and 蔵野 美恵子 and 川嶋 元},
 month = {Sep},
 note = {CR-39 plastic is well-known as most sensitive nuclear track detector for proton and heavy ions. CR-39 is widely utilized for not only dosimetric fields such as personal neutron dosimetry and heavy ion dosimetry, environment radiation monitoring, space radiation dosimetry but also various applications such as the spectroscopy of laser-driven ion beams, high energy cosmic ray physics and nuclear physics. Previously, we have developed a high speed microscope system (HSP-1000) for nuclear track measurement with a line sensor camera in place of a traditional CCD camera [1]. The actual scanning speed including all of procedure such as stage movement, image processing on board and writing out image data to hard disk was typically 8.8 min/cm^2. The scanning speed limit strongly depends on the brightness of image for taking picture. Recently, the scanning speed has been drastically improved to be 0.5 min/cm^2 by TDI (time delay integrator) sensor replacing a line sensor. TDI allows to take a high-intensity image by the integration of brightness of lines with two dimensional sensor of 4096 × 96 pixels. For the high speed image acquisition, the image is continuously and automatically focusing with two line sensors system. On the other hand, the track analysis software (PitFit) has been specifically designed for measuring the parameters of etch pit openings [1]. The edge of etch pit is detected through the image analysis procedure of noise eduction and binarization of the image after setting a greyscale threshold. The track size and its position of center are extracted with an ellipse fitting algorithms. This method can easily make analysis of heavy ion tracks due to the high contrast of etch pit compared with background gray level, while it was difficult to detect shallow tracks with similar gray level as background. Recently, thus kind of shallow tracks such as recoiled proton due to neutron and low LET (liner energy transfer) particles of space radiation are easily and automatically extracted with the differential edge detection algorithm. In this report, we will show the advanced track microscope and track analysis system and the applications for various radiation fields., The 26th International Conference on Nuclear Tracks in Solids},
 title = {Precise track analysis and application for various radiation fields with high speed microscope and PitFit software},
 year = {2014}
}