Analysis of radiation dose variations measured by passive dosimeters onboard the International Space Station during the solar quiet period (2007-2008)

被引：20

作者：

Kodaira, Satoshi ^{[1
]}

Kawashima, Hajime ^{[1
]}

Kitamura, Hisashi ^{[1
]}

Kurano, Mieko ^{[1
]}

Uchihori, Yukio ^{[1
]}

Yasuda, Nakahiro ^{[1
]}

Ogura, Koichi ^{[2
]}

Kobayashi, Ikuo ^{[3
]}

Suzuki, Akifumi ^{[3
]}

Koguchi, Yasuhiro ^{[4
]}

Akatov, Yury A. ^{[5
]}

Shurshakov, Vyacheslav A. ^{[5
]}

Tolochek, Raisa V. ^{[5
]}

Krasheninnikova, Tatiana K. ^{[6
]}

Ukraintsev, Anatoliy D. ^{[6
]}

Gureeva, Elena A. ^{[7
]}

Kuznetsov, Vladimir N. ^{[7
]}

Benton, Eric R. ^{[8
]}

机构：

[1] Natl Inst Radiol Sci, Chiba 2638555, Japan

[2] Nihon Univ, Chiba, Japan

[3] Nagase Landauer Ltd, Ibaraki, Japan

[4] Chiyoda Technol Corp, Ibaraki, Japan

[5] Russian Acad Sci, Inst Biomed Problems, Moscow, Russia

[6] OAO Biochimmash, Moscow, Russia

[7] Space Rocket Corp Energia, Moscow, Moscow Region, Russia

[8] Oklahoma State Univ, Stillwater, OK 74078 USA

来源：

RADIATION MEASUREMENTS | 2013年 / 49卷

关键词：

Space radiation dosimetry; Passive detectors; Plastic nuclear track detector; Thermoluminescence detector; Long-term variation; Secondary particles; High LET particles; Target fragments; LOW-EARTH-ORBIT; RRMD-III; SHUTTLE; ENVIRONMENT; EQUIVALENT; DETECTOR; SPECTRA; CR-39; ISS; TLD;

D O I：

10.1016/j.radmeas.2012.11.020

中图分类号：

TL [原子能技术]; O571 [原子核物理学];

学科分类号：

0827 ; 082701 ;

摘要：

The average absorbed dose and dose equivalent rates from space radiation were observed using passive dosimeters with same material and configuration at the same location onboard the International Space Station (ISS) over four different occasions (I-IV) between 2007 and 2008. The passive dosimeters consisted of a combination of thermoluminescent detectors (TLDs) and plastic nuclear track detectors (PNTDs). Total average absorbed dose rate increased by 68 +/- 9% over two years. The observed increase was due to the incremental increase in the altitude of the ISS over the course of the experiment and the corresponding increase in trapped proton flux encountered during passage of the ISS through the SAA (South Atlantic Anomaly), which was confirmed with the results monitored by DB-8 active dosimeter on the ISS. The PNTD data showed that the average absorbed dose and dose equivalent rates from particles of LET infinity H2O >= 100 keV/mu m were 28 +/- 2% and 51 +/- 3% of >= 10 keV/mu m during Periods I-III, while the dose contributions of particles >= 100 keV/mu m during Period IV were 36 +/- 5% and 59 +/- 10%, respectively. The integral dose equivalent distribution during Period IV shows significant enhancement from particles >= 100 keV/mu m. These facts suggest that a significant fraction of the high LET component is due to short-range recoil nuclei produced in target fragmentation reactions between primary protons and the nuclei of the passive dosimeters and surrounding materials. (C) 2012 Elsevier Ltd. All rights reserved.

引用

页码：95 / 102

页数：8