KM3NeTKM3NeTNeutrino telescope in the Neutrino telescope in the

Mediterranean SeaMediterranean Sea

cosmic neutrino

1. neutrino from cosmic source2. travels through the Earth3. converts into a muon particle4. which is detected by the telescope

KM3NeT telescope

KM3NeT

cosmic neutrino

cosmic neutrino

1. neutrino converts into a muon2. muon gives light in the sea water3. light is detected by photo sensors

Earth

Optical Module:high pressureglass sphere with 32 PMTs

Room for electronicsPhotonic chip

300 lines, each with25 glass spheres i.e. ~100.000 PMTs in KM3NeT

GPSrec.

Shore station

laser1..n

2

n+1Clock

apd

clck-sc-cal.

data

GbECopper

Logics

CPUs

Power

~16 x

apd

Clockcal

½ns

On-shoreOff-shore, at 3000-5000 m depth

20-100 kmfiber

1 .. 16 x

c

PMT

PMT

Optical module

c

1>2

1+2n+n+1

data

~30 xPower

serdes