Space Radiation and its Effects on EEE Components
Space Radiation and its Effects on EEE Components
Space Radiation and its Effects on EEE Components
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<str<strong>on</strong>g>Space</str<strong>on</strong>g> <str<strong>on</strong>g>Radiati<strong>on</strong></str<strong>on</strong>g> <str<strong>on</strong>g>and</str<strong>on</strong>g> <str<strong>on</strong>g>its</str<strong>on</strong>g> <str<strong>on</strong>g>Effects</str<strong>on</strong>g> <strong>on</strong> <strong>EEE</strong> Comp<strong>on</strong>ents<br />
LET spectrum<br />
• To study the effects of GCR in microcircu<str<strong>on</strong>g>its</str<strong>on</strong>g>,<br />
heavy i<strong>on</strong>s are comm<strong>on</strong>ly described by amount of<br />
energy lost per unit track length i.e. Linear Energy<br />
Transfer<br />
• Linear Energy Transfer (LET)<br />
– Energy loss per unit path length<br />
– dE/dx = MeV/cm<br />
– Divide by material density = MeV-cm 2 /mg<br />
– LET of 97 MeV-cm 2 /mg corresp<strong>on</strong>ds to charge<br />
depositi<strong>on</strong> of 1pC/μm<br />
• How does LET spectrum relate to the real space<br />
envir<strong>on</strong>ment?<br />
EPFL <str<strong>on</strong>g>Space</str<strong>on</strong>g> Center 9th June 2009
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