EUSO Atmospheric Monitoring from Space

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EUSOAtmospheric Monitoring from Space

• M.Teshima
• on behalf of the EUSO collaboration
• MPI für Physik, München
• (Werner-Heisenberg-Institut)

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EUSO Concept

• Large Distance and Large F.O.V. ? Large Aperture
• 6x105 km2 sr
• Good Cosmic Ray detector
• 3000 times sensitive to C.R. bursts
• 2000 Giga-ton atmosphere
• Good neutrino detector
• All Sky coverage
• North and south sky covered uniformly. ISS orbit
  50inclination.
• Complementary to the observation from the ground
• Different energy scale
• Different systematic errors
• Shower Geometry is well defined
• Constant distance from detector

Attenuation correction is minimum!!
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Atmospheric monitoring in EUSO

• IR 10µm CCD camera (256x256), UV CCD Camera
• IR Cloud monitor (clould looks colder than the
  ground temperature)
• UV Detection of lightening and other background,
  for example, air plane flash
• Ground Light Source Complimentary to Onboard
  lidar
• Ground based LIDAR system, 10-20 stations
• Flashers, Hamamatsu L6604
• 10 ground stations NASA research aircraft P-3B
• 500-1000 flashes/station can be used for
  monitoring
• Onboard LIDAR system
• Power and mass budget
• Effectiveness on the analysis
• Current Baseline design
• one color 1064nm LIDAR system, 50mJ/100Hz, 140kg,
  300W
• Blind LIDAR for EUSO
• Information
• top of thick cloud altitude
• Thin cloud transmission at 1000nm

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Flasher and the intensityIntegrated transmission
can be measured
Hamamatsu L6604 1J/shot
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Flasher Image on EUSO FS
30Hz flash rate 0.05 deg / flash Total 1000
flashes
EUSO 16km/s
EUSO FOV
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50mJ Nd YAG Ground LIDAR

• Define beam intensity in each laser path by
  G.B.L.
• Transmissions between space and various altitude
• Simulate shower track
• Check reconstruction quality
• End to end experimental calibration
• 10stations ? 1/day

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Lidar Image on EUSO FS
100Hz shot rate 0.01 deg / shot Total 3000 shots
EUSO 16km/s
Good simulation for Cherenkov fluorescence
EUSO FOV