Study of the radiation environment on MIR space station with SILEYE-2 experiment

Casolino, M.; Bidoli, V.; Grandis, E. De; Pascale, M. P. De; Furano, Gianluca; Morselli, A.; Narici, L.; Picozza, P.; Reali, E.; Sparvoli, R.; Galper, A. M.; Korotkov, M.; Ozerov, Yu. V.; Popov, A.; Mazzenga, G.; Ricci, M.; Castellini, G.; Avdeev, S.; Boezio, M.; Bonvicini, W.; Vacchi, A.; Zampa, N.; Спиллантини, П.; Carlson, P.; Fuglesang, C.

doi:10.1016/s0273-1177(02)00880-3

Cited by 11 publications

(6 citation statements)

References 13 publications

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“…Astronauts reported light flashes during the space trip that was part of the moon landing mission. Further space missions confirmed these reports and aimed to detect and correlate cosmic rays with visual sensations [ 17 , 34 – 36 ]. The light flash rate was higher going toward the moon than back to earth and also in low earth orbit at high latitudes where particle flux, including protons [ 37 ], was higher due to the lower geomagnetic shielding which allows lower energy particles to reach the low earth orbit [ 36 , 38 , 39 ].…”

Section: Occurrence Of Phosphenes In Irradiated Patientsmentioning

confidence: 99%

Mechanisms of phosphenes in irradiated patients

et al. 2017

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Anomalous visual perceptions have been reported in various diseases of the retina and visual pathways or can be experienced under specific conditions in healthy individuals. Phosphenes are perceptions of light in the absence of ambient light, occurring independently of the physiological and classical photonic stimulation of the retina. They are a frequent symptom in patients irradiated in the region of the central nervous system (CNS), head and neck and the eyes. Phosphenes have historically been attributed to complex physical phenomena such as Cherenkov radiation. While phosphenes are related to Cherenkov radiation under high energy photon/electron irradiation conditions, physical phenomena are unlikely to be responsible for light flashes at energies used for ocular proton therapy. Phosphenes may involve a direct role for ocular photoreceptors and possible interactions between cones and rods. Other mechanisms involving the retinal ganglion cells or ultraweak biophoton emission and rhodopsin bleaching after exposure to free radicals are also likely to be involved. Despite their frequency as shown in our preliminary observations, phosphenes have been underreported probably because their mechanism and impact are poorly understood. Recently, phosphenes have been used to restore the vision and whether they might predict vision loss after therapeutic irradiation is a current field of investigation. We have reviewed and also investigated here the mechanisms related to the occurrence of phosphenes in irradiated patients and especially in patients irradiated by proton therapy for ocular tumors.

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Section: Occurrence Of Phosphenes In Irradiated Patientsmentioning

confidence: 99%

Mechanisms of phosphenes in irradiated patients

et al. 2017

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“…It follows Sileye and Sileye-2, which both flew on the Russian space station Mir in the 1990s [9][10][11][12][13]. Alteino was launched in 2002 and placed in the Pirs module.…”

Section: Introductionmentioning

confidence: 99%

Measurements of heavy-ion anisotropy and dose rates in the Russian section of the International Space Station with the Sileye-3/Alteino detector

Larsson

Benghin

Berger

et al. 2014

J. Phys. G: Nucl. Part. Phys.

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In this work we present data on linear energy transfer (LET), dose and dose equivalent rates from different locations of the Russian part of the International Space Station (ISS) measured by the Sileye-3/Alteino detector. Data were taken as part of the ESA ALTCRISS project from late 2005 through 2007. The LET rate data shows a heavy-ion (LET >50 keV/μm) anisotropy. From the heavy-ion LET rate in the Zvezda service module we find ISS y( Starboard) and zˆ(Nadir) to be about 10-15 times higher than in x (Forward). The situation is similar for dose and dose equivalent rates, ranging from 25-40 μGy

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“…Without protons we obtain H tot = 96. 4 In order to give an idea of character of the numbers of Table 4, we cite the dose limits as recommended by the International Commission on Radiological Protection (ICRP) (20). Two sets of limits are defined: one for individual exposed occupationally and one for the general public.…”

Section: The Space Radiation Effectsmentioning

confidence: 99%

“…In order to evaluate the LF phenomenon it is necessary the simultaneous determination of time, nature, energy and trajectory of the particle passing through the cosmonaut eyes, as well as the cosmonaut LF perception time. Some previous experiments are described in (4)(5)(6).…”

Section: Introduzionementioning

confidence: 99%

The use of a syncytium model of the crystalline lens of the eye as a new tool to study the light flashes phenomenon seen by astronauts

Nurzia

Scrimaglio

Spataro

et al. 2006

Radiat Environ Biophys

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A syncytium model to study some electrical properties of the eye is proposed to study the phenomenon of anomalous light flashes (LF) perceived by astronauts in orbit. The crystalline lens is modelled as an ellipsoidal syncytium with a variable relative dielectric constant. The corresponding mathematical model is a boundary value problem for a system of two coupled elliptic partial differential equations in the two unknown syncytial electrical potentials. A numerical method to compute an approximate solution of this mathematical model is used, and some numerical results are shown. The model can be regarded as a new tool to study the LF phenomenon. In particular, the energy lost in the syncytium by a transversing cosmic charged particle is calculated and the results obtained with the syncytium model are compared with those obtained using the previously available Geant 3.21 simulation program. In addition, the interaction of antimatter-syncytium is studied, and the Creme96 computer program is used to evaluate the cosmic ray fluxes encountered by the International Space Station in its standard mission.

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Study of the radiation environment on MIR space station with SILEYE-2 experiment

Cited by 11 publications

References 13 publications

Mechanisms of phosphenes in irradiated patients

Mechanisms of phosphenes in irradiated patients

Measurements of heavy-ion anisotropy and dose rates in the Russian section of the International Space Station with the Sileye-3/Alteino detector

The use of a syncytium model of the crystalline lens of the eye as a new tool to study the light flashes phenomenon seen by astronauts

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