El Experimento ATLAS: Ciencia y TICs
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El Experimento ATLAS: Ciencia y TICs
M. Losada
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ATLAS en el Mundo
Datos
37 países
174 instituciones
2700 integrantes
1800 con Ph.D.
349 mujeres
15.6% mujeres
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EL PROYECTO LHC
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Vista General del LHC y sus Experimentos
50-150 m de profundidad27 km de circunferencia
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Progreso en nuestro conocimiento de la materia
El protón, de hecho, no esta solamente formado por tres quarks (uud)
Realmente hay 3 quarks de valencia (uud) + un “mar” de gluones y parejas quark-antiquark de vida corta
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Partículas y Campos elementales(Los constituyentes de la materia)
10-9 m
10-10 m
10-15 m
PS
10-18 m
10-14 m
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Unificación de las fuerzas fundamentales
Quantum Gravity
Super Unification
Grand Unification
Electroweak Model
QED
Weak Force
Nuclear Force
Electricity
Magnetism
Maxwell
Short range
Fermi
QCD
Long range
Short range
Terrestrial Gravity
Celestial Gravity
Einstein, NewtonGalilei
Kepler
Long range
?
Universal Gravitation
Electro magnetism
Weak TheoryStandard
model
Theories: STRINGS? RELATIVISTIC/QUANTUM CLASSICAL
SU
SY
?
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No sabemos todo!
Porqué tres generaciones?
Supersimetría?
El origen de la masa?Bosón de Higgs?
El LHC ayudará a resolver todos estos misterios
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Porqué aceleradores? Investigación en física de Partículas
Aceleradores y detectores
Microscopios Telescopios ópticos y radiotelescopios
Binoculares
La astrofísica estudia la materia en sus dimensiones más grandes
La física de partículas estudia la materia en sus dimensiones más ínfimas
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ATLAS Barrel Toroid coil transport and lowering into the underground cavern
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Colisiones en el LHC
Bunch Crossing 4 107 Hz
7x1012 eV Beam Energy 1034 cm-2 s-1
Luminosity 2835 Bunches/Beam 1011
Protons/Bunch
7 TeV Proton Proton colliding beams
Proton Collisions 109 Hz
Parton Collisions
New Particle Production 10-5 Hz (Higgs, SUSY, ....)
p pH
µ+
µ-
µ+
µ-
Z
Zp p
e- e
q
q
q
q
1
-
g~
~
20~
q~
10~
Selection of 1 event in 10,000,000,000,000
7.5 m (25 ns)
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Trigger and Data Acquisition
So
ftw
are
Har
dw
are
Reducir rata de 40 MHz a 200Hzreteniendo los
eventos interesantes que
son raros
200Hz bytestream de 1.6MB de “raw
data” , que llegan a ser 30TB/dia.
Level 1 decision based on data from calorimeters and muon trigger chambers; synchronous at 40 MHz
Level 2 uses Regions of Interest identified by Level-1 (< 10% of full event) with full granularity from all detectors
Event Filter has access to full event and can perform more refined event reconstruction
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Worldwide LHC Computing Grid (WLCG)
WLCG is a worldwide collaborative effort on an unprecedented scale in terms of storage and CPU requirements, as well as the software project’s size
GRID computing developed to solve problem of data storage and analysis
LHC data volume per year: 10-15 Petabytes
Web pública approx. 8 TB
One CD has ~ 720 Mbyte 109 MB = 1015 Byte
(Note: the WWW is from CERN... )
Concorde(15 Km)
Balloon(30 Km)
CD stack with1 year LHC data!(~ 20 Km)
Mt. Blanc(4.8 Km)
50 CD-ROM
= 35 GB
6 cm
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Tier-0 (CERN):•Data recording•First-pass reconstruction
•Data distribution
Tier-1 (11 centres):•Permanent storage•Re-processing•Analysis
Tier-2 (>200 centres):• Simulation• End-user analysis
WLCG Grid
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Worldwide LHC Computing Grid
LCG/EGEE/OSG e-Science Grid is in production:
• World-wide Coverage
• Over 200 sites
• > 20’000 CPUs
• Multi-petabyte storage
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Primeras Colisiones 2009/2010
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H ZZ 4
e,
Z
e,
e,
e, mZ
Hg
g
tZ(*)
“Gold-plated” channel for Higgs discovery at LHC
Simulation of a H ee event in ATLAS
Physics example
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Prestación de Servicios HPCPrestación de Servicios HPCMuchos procesos investigativos, independiente del área que trate, requiere servicios computacionales de alto desempeño.
Ejemplos: medicina, geociencias,etc etc
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La estrategia propuesta se basa en una combinación La estrategia propuesta se basa en una combinación de tres modelos existentes: Cluster Computing (UAN), de tres modelos existentes: Cluster Computing (UAN), Grid Computing (UAN+) y servicios Cloud Computing.Grid Computing (UAN+) y servicios Cloud Computing.
Internet +Internet2
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Gracias!!
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Backup slides
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Typical Elements of a Collider Detector
Central detector • Tracking, p
T, MIP
• Em. shower position • Topology
• Vertex
Electromagnetic and Hadron calorimeters • Particle identification (e, Jets, Missing E
T)
• Energy measurement
Each layer identifies and enables the measurement of the momentum or energy of the particles produced in a collision
µµnn
pp
Heavy materials
Heavy materials (Iron or Copper + Active material)
ee
Materials with high number of protons + Active material
Light materials
Muon detector • µ identification
Hermetic calorimetry • Missing Et measurements