title: Measurements of the linear energy transfer spectra on the Mir orbital station and comparison with radiation transport models.
abstract: A tissue equivalent proportional counter designed to measure the linear energy transfer spectra (LET) in the range 0.2-1250 keV/micrometer was flown in the Kvant module on the Mir orbital station during September 1994.  The spacecraft was in a 51.65 degrees inclination, elliptical (390 x 402 km) orbit.  This is nearly the lower limit of its flight altitude.  The total absorbed dose rate measured was 411.3 +/- 4.41 microGy/day with an average quality factor of 2.44.  The galactic cosmic radiation (GCR) dose rate was 133.6 microGy/day with a quality factor of 3.35.  The trapped radiation belt dose rate was 277.7 microGy/day with an average quality factor of 1.94.  The peak rate through the South Atlantic Anomaly was approximately 12 microGy/min and nearly constant from one pass to another.  A detailed comparison of the measured LET spectra has been made with radiation transport models.  The GCR results are in good agreement with model calculations; however, this is not the case for radiation belt particles and again points to the need for improving the AP8 omni-directional trapped proton models.
authors.affiliation: Space Radiation Analysis Group, NASA Johnson Space Center, Houston, TX 77058-3696, USA.
authors.forename: G D
authors.initials: GD
authors.lastname: Badhwar
authors.forename: A
authors.initials: A
authors.lastname: Konradi
authors.forename: W
authors.initials: W
authors.lastname: Atwell
authors.forename: M J
authors.initials: MJ
authors.lastname: Golightly
authors.forename: F A
authors.initials: FA
authors.lastname: Cucinotta
authors.forename: J W
authors.initials: JW
authors.lastname: Wilson
authors.forename: V M
authors.initials: VM
authors.lastname: Petrov
authors.forename: I V
authors.initials: IV
authors.lastname: Tchernykh
authors.forename: V A
authors.initials: VA
authors.lastname: Shurshakov
authors.forename: A P
authors.initials: AP
authors.lastname: Lobakov
mesh_terms: D001938:Brazil; D003359:Cosmic Radiation; D018499:Linear Energy Transfer; D008962:Models, Theoretical; D009502:Neutrons; D011522:Protons; D011829:Radiation Dosage; D011834:Radiation Monitoring / Q000295:instrumentation; D011874:Radiometry / Q000295:instrumentation; D019445:Solar Activity; D013026:Space Flight / Q000295:instrumentation*
chemical_list: D011522:Protons