20/09/02 Antonio Capone - Neutrinos and Subterranean Science - Washington, DC - USA 1 NEMO Status Report Antonio Capone - INFN - Roma on behalf of the NEMO Collaboration http://nemoweb.lns.infn.it/ Neutrinos and Subterranean Science - NeSS02 Washington, DC - USA - 19÷21 September 2002 -A Km 3 scale high-energy Neutrino Telescope -Site selection and characterization in Mediterranean Sea -R&D program for the “KM3” neutrino detector construction -Present detector design: sensitivity and resolutions -The “test site” close to Catania (Sicily, Italy) -Construction plans
32
Embed
NEMO Status Report - Institute for Nuclear Theory · NEMO Status Report Antonio Capone - INFN - Roma on behalf of the ... Each 1660SM will collect all the data coming from the 16
This document is posted to help you gain knowledge. Please leave a comment to let me know what you think about it! Share it to your friends and learn new things together.
Transcript
20/09/02 Antonio Capone - Neutrinos and Subterranean Science - Washington, DC - USA 1
NEMO Status Report
Antonio Capone - INFN - Romaon behalf of the
NEMO Collaborationhttp://nemoweb.lns.infn.it/
Neutrinos and Subterranean Science - NeSS02Washington, DC - USA - 19÷21 September 2002
-A Km3 scale high-energy Neutrino Telescope-Site selection and characterization in Mediterranean Sea-R&D program for the “KM3” neutrino detector construction-Present detector design: sensitivity and resolutions-The “test site” close to Catania (Sicily, Italy)-Construction plans
20/09/02 Antonio Capone - Neutrinos and Subterranean Science - Washington, DC - USA 2
NEMO Collaboration
INFN:Bari, Bologna, Cagliari, Catania, Genova, LNF, LNS, Messina, Roma - ITALY
CNR:Istituto di Oceanografia Fisica (La Spezia)Istituto di Biologia del Mare (Venezia)Istituto Talassografico (Messina)Istituto GEOMARE-SUD (Napoli)
Istituto Nazionale di Geofisica e Vulcanologia
Istituto Nazionale di Oceanorafia e Geofisica Sperimentale (Trieste)
Centro Interdisciplinare di Bioacustica e Ricerche Ambientali (Pavia)
Marina Militare Italiana
Saclant NATO Undersea Research Centre
Universities of:Bari, Bologna, Cagliari, Catania, Genova, Messina, Roma - ITALY
20/09/02 Antonio Capone - Neutrinos and Subterranean Science - Washington, DC - USA 3
Site selection for a Km3 Undersea Cherenkov High-Energy Neutrino Telescope
in Mediterranean at depth >3000m (1998-2000)
35° 50’ N, 16° 10’ E (3350m) in the Ionian Sea (Capo Passero) 39° 05’ N, 13° 20’ E (3400m) in the Tyrrhenian Sea (Ustica)39° 05’ N, 14° 20’ E (3400m) in the Tyrrhenian Sea (Alicudi)40° 40’ N, 12° 45’ E (3500m) in the Tyrrhenian Sea (Ponza)
Selected as “Test Site”
20km from shore2000m depth
Best site for the Best site for the “km“km33 Telescope”Telescope”
80 km from shore80 km from shore3300m depth3300m depth
20/09/02 Antonio Capone - Neutrinos and Subterranean Science - Washington, DC - USA 4
Depth and atmospheric Muon Flux reduction
Φµ(
cm-2
sr-1
sec-1
)
AMANDA
ANTARES
NEMO
NESTOR
(B&W plot from Moscoso)
Φµ(
cm-2
sr-1
sec-1
)
20/09/02 Antonio Capone - Neutrinos and Subterranean Science - Washington, DC - USA 5
Capo Passero deep sea currentsCollected ~ 3 years of deep-sea current data in Capo Passero “KM4” site.
---> average current intensity: 3.1 cm/sec (rms 2.1)---> maximum current intensity: < 16 cm/sec
RCM8: Mechanical current meterRCM11: Doppler current meter
20/09/02 Antonio Capone - Neutrinos and Subterranean Science - Washington, DC - USA 6
Capo Passero: sedimentation rateSe
dim
ent f
lux
(mg
m-2
d-1)
time
20/09/02 Antonio Capone - Neutrinos and Subterranean Science - Washington, DC - USA 7
In situ Measurements of Inherent Optical PropertiesAC9: absorption(a), scattering (b) and attenuation (c=a+b) for
20/09/02 Antonio Capone - Neutrinos and Subterranean Science - Washington, DC - USA 23
The proposed Km3 project: underwater connectors and jumpers
Studied with Ocean Design
OD is a leading company in the manufacture of underwater wet mateable connectors, JB – JB jumper and JB – BU jumpers.
Wet-mateable hybrid [optical / electrical]
Mate up to 8 optical fibers and/or electrical circuits underwater. Available in ROV, manual and stab-plate versions with single and/or multi-mode optical fiber. In a single connector, multiple channels allow for higher fiber count, maintenance flexibility and expansion.
Specifications
•100 mate cycles without refurbishment•< 0.5 dB attenuation/optical contact•10 amps at 1,000 volts electrical circuit•10,000 psi operation, •80 lbs mating force for ROV format
20/09/02 Antonio Capone - Neutrinos and Subterranean Science - Washington, DC - USA 24
The proposed Km3 project: data transmission system
ALCATEL Italiaproposed a data transmission system according to NEMO specifications.
System characteristics :
• standard telecom system;• redundancy;• high MTBF;• auto-reconfiguration in case of fails; • high transmission rate;• low power consumption
(< 500 W each string tower)
One module for each plane of the string.This Optical Module (S-1.1) will be used as Electrical/Optical converter within the customerequipment in both sides, under sea and in the landing station.
one (STM1 + ST1.1)per each arm
one 1660 SM per tower
One module for each tower of the detector. Each 1660SM will collect all the data coming from the 16 STM 1 of the string. The module will be closed inside a small Junction Box at the base of the string.
20/09/02 Antonio Capone - Neutrinos and Subterranean Science - Washington, DC - USA 25