title: Determination of high LET cosmic particles' trajectories for space radiobiological studies.
abstract: During IML-1 mission, we carried out space experiments on radiobiological effect of a single HZE cosmic particle. In the experiment, the precise determination of the distance between the center of the particle trajectory and the individual biological objects around it is an indispensable condition. For the detection of HZE particles CR-39 track detectors were used and analyzed by the video image processing. The positions of biological objects in relation to a particle trajectory were measured by referring to the laser grid marks which were printed on the surface of CR-39 detector. We describe such an experimental method and report the applicability of this method.
authors.affiliation: College of Industrial Technology, Nihon University, Narashino, Japan.
authors.forename: K
authors.initials: K
authors.lastname: Ogura
authors.forename: T
authors.initials: T
authors.lastname: Doke
authors.forename: T
authors.initials: T
authors.lastname: Kasuya
authors.forename: K
authors.initials: K
authors.lastname: Kuwahara
authors.forename: M
authors.initials: M
authors.lastname: Matsushima
authors.forename: S
authors.initials: S
authors.lastname: Nagaoka
authors.forename: H
authors.initials: H
authors.lastname: Ohnishi
authors.forename: T
authors.initials: T
authors.lastname: Takahashi
authors.forename: H
authors.initials: H
authors.lastname: Yamada
authors.forename: F
authors.initials: F
authors.lastname: Yatagai
mesh_terms: D001412:Bacillus subtilis / Q000528:radiation effects*; D003359:Cosmic Radiation; D007091:Image Processing, Computer-Assisted; D007834:Lasers; D018499:Linear Energy Transfer; D009686:Nuclear Physics; D010969:Plastics; D011092:Polyethylene Glycols; D011829:Radiation Dosage; D011834:Radiation Monitoring / Q000295:instrumentation; D011874:Radiometry; D013026:Space Flight; D013171:Spores, Bacterial / Q000528:radiation effects; D014893:Weightlessness
chemical_list: D010969:Plastics; C028827:CR 39; D011092:Polyethylene Glycols