? ? ? ? ? ? ? EUSO

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? ? ? ? ? ? ? EUSO Extreme Universe Space
Observatory

• ??? ?a???s?as??
• ??sa???? F?sµa ????
• ???p?? ?e?t?????a?
• ???? t?? a????e?t?
• ??a??t?ta t?? a????e?t?

• ?????? ???es??p??
• ?pt???-Fa???
• F??t?a
• ?????e?t??? ?p?f??e?a ?st?as??

• Duty Cycle
• ??aµe??µe?e? ??µ??
• S?????s? µe ep??e???? a????e?t??

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??sa???? F?sµa ????
1. GZK ?at?f?? ?? e?e??e?a?? f?sµa t?? p µe
?gt 5x1019 eV
p??pe? ?a ??e? ??a ?at?f?? e?a?t?a? t??
ap??e?a? e????e?a?
ap? t?? ?-p pa?a????. 2. ?????ep?d?as?
f??t?sµ???? s?µat?d??? µe ?2 ?
?a?t???ß???a f????sµ??, ???t? st? ?pe???de?
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??sa???? F?sµa ????
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???p?? ?e?t?????a?

• ?a?at???s? s?µ?t?? F????sµ?? ?a? Cerenkov
• ?a?at???s? st?? s??te??? µe??? t?? G??, ?p?
• ????????µ??? ????a 60.
• ?ata??af? ap? µe?????? ?pt????? fa????
• Fresnel se µe???? est?a?? ep?f??e?a -
• ?????de? µ????? f?t?s????e?.

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? a????e?t??
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?????? ???es??p??

• 3 ????a tµ?µata
• a.fa???
• b.a????e?t???
  ep?f??e?a est?as??
• c.s?st?µa t??
  trigger ?a? ??e?t??????
• 2. S?????e?
• a. ?????? 380 km
• b. FOV 30
• c. ??e??e?a?? ?at?f??
  3x1019 eV
• d. M??e??? pixel 0.8 km2

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?????? ???es??p??
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Fa???

• ??? fa??? Fresnel
• 2.5 m d??µet???
• ????s? t?? ???es??
• (d??f?a?µa) x (??????)
• ?p?f??? t?? ap????f?s??
• t?? a?t???ß???a?

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F??t?a

• ????e?s? µ??? st??
• pe????? 300 400 nm
• ?p?t??pe? t? 90
• t?? ep???µ?t?? ????
• ?p?t??pe? t? 80 t??
• ??aµµ?? 200 ? 300 nm
• ?a? 425 ? 800 nm

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?????e?t??? ?p?f??e?a ?st?as??

• ?pa?t?se?? ??a
• µ???? ?ata????s? ?s????
• µ???? ß????
• µ????? d?ast?se??
• ??????? ????? ap????s??
• µe???? ??a??t?ta a????e?s?? st?? pe????? t??
  ?pe???d???
• e?a?s??s?a se ??a µ??? f?t???e?t?????

?amamatsu R7600
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?????e?t??? ?p?f??e?a ?st?as??
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Duty Cycle

• ?a?????eta? ap?
• N??te???? ??????? pe???d?? t?? ISS (40 t??
  s???????? ??????)
• ?p??e?e? p???? p?? e?p?µp??? f??, f?s???? ?
  te???t??. (90 ??a??t?ta )
• Se????a??? ?????? ( 50 . T? ?p?ßa??? µe
  ?µ?s????? a????e? ?at? 10 f???? ap? ?,t? ?????
  fe?????).
• S???efa st? ped?? t?? ??as?? (60-80 a?????a t?
  d?e????s? ?f???? ?a? t?? e????e?a t?? ?e????t??).
• ???e? d?ast????t?te? t?? sta?µ?? (ap?d?s? 90 ).

DUTY CYCLE 0.1 0.15
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??aµe??µe?e? t?µ??
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??aµe??µe?e? t?µ??
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S?????s? µe ep??e???? a????e?t??

• a) AGASA
• 300 km2 . sr
• sp??????st?? ??a ??e?t??µa???t?????
  ?ata???sµ??? ?a? a????e?t?? µ??????.
• b) HiRes
• 1000 km2 . sr
• a????e?t?? f????sµ??.
• c) AUGER
• 7000 km2 . sr
• s??d???e? a????e?t??? s?st?µata ?a? t?? d??
  p??a?afe????t?? pe??aµ?t??.

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S?????s? µe ep??e???? a????e?t??