Transcript Argonne’s Rôle in ZEUS José Repond Argonne National Laboratory

Argonne’s Rôle in ZEUS
José Repond
Argonne National Laboratory
DOE Visit, Germantown, March 11th, 2004
Question
Necessary ?
What happens to ZEUS without ANL participation?
Unique ?
Could any other institution replace ANL?
Impact on other ANL projects ?
Does participation in ZEUS help with other ANL projects?
Review ANL
contributions to ZEUS
Overview of current
involvement
Answer the question…
ANL contributions to ZEUS: Hardware
Description
Uranium – Scintillator sandwich calorimeter
32 Modules each weighing 12 tons
Compensating → world’s best hadronic energy resolution
Built by collaboration of 10 US institutions
Argonne’s rôle
Mechanical design + prototyping
Cladding of Uranium plates
Fabrication of mechanical structures
Mechanical assembly + tests
Mounting of electronics
Tests with cosmic rays (all modules)
Installation in experiment
Commissioning of calorimeter
Operation and maintenance
ANL contributions to ZEUS: Hardware
Description
Receives input from calorimeter regions
Calculates various quantities
Total calorimeter energy
Total transverse energy ET
Number of isolated electrons
Number of isolated muons
….
Sends information to Global FLT
Extremely complex system
Necessary component for data taking
Argonne’s rôle
Concept
Design
Prototypes + tests
Fabrication
Commissioning
Operation and maintenance
ANL contributions to ZEUS: Hardware
Description
Located in front of Barrel EM Calorimeter
Consisting of 32 cassettes with 13 tiles each
Scintillator with fiber readout into PMTs
Argonne’s rôle
Proposal
Prototyping
Design
Fabrication
Installation
Commissioning
Operation and maintenance
Physics analysis
Electron energy corrections
Hadron jet energy correction
Prompt photon physics analysis
ANL contributions to ZEUS: Hardware
Description
Tracker in rear direction
Precision electron angle
Scintillator strips with fiber readout
Argonne’s rôle
Project management
First level trigger
Design, prototyping and fabrication
Commissioning
Physics analysis
Alignment
F2(x,Q2) measurements
Operation and maintenance
ANL contributions to ZEUS: Hardware
Description
Covers angles between 50 – 250
11040 tubes
Reuse of existing rear-end electronics (2000 channels)
Argonne’s rôle
Design
Prototype
Fabricate
Test
Front-end readout electronics
Contribution to recent repair
Continuous support
Physics analysis
Development of Kalman tracking filter
Measurement of charm production in forward direction
ANL contributions to ZEUS: Physics output
Physics chairman
Physics group coordinators
Exotic searches
Structure function measurements
Hadronic jets and QCD
Members in ZEUS editorial panel
Diffraction
1/29
Structure Functions
5/22
Hadronic Jets and QCD
9/54
Heavy Flavors
1/13
Exotic Searches
0/18
16/136 ZEUS physics papers with major Argonne involvement
ANL contributions to ZEUS: Physics output
Electroweak unification 1995
Charm structure function 2004
In collaboration with
University of Wisconsin
In collaboration with
University of Wisconsin
Pentaquark search 2004
Precision jet physics 2001
Diffractive cross sections 2002
ANL contributions to ZEUS: Management
Deputy
Rik Yoshida
2000 – 2002
Spokesperson
Rik Yoshida
2003 – 2006
Calorimeter
Barrel Presampler
Small Angle Rear Tracker Detector
Calorimeter FLT Processor
Run
ANL contributions to ZEUS: at present
Manpower
3.25 staff
2.0 retirees
2.0 students
Calorimeter FLT Processor
Small Angle Rear Track Detector FLT
Straw Tube Tracker Front-end Electronics
Barrel Presampler
Calorimeter
Shift leaders
Argonne solely responsible
Major Argonne rôle
ANL initiative
Coordination of QCD physics group
Members in ZEUS editorial board
Spokesperson until end of 2006
Pentaquark searches
Forward jet measurements
Charm + jet in photoproduction
Beauty production cross sections
Prompt photon photoproduction
Given manpower limits:
very strong contribution
Back to the question
Necessary?
Without ANL contributions, ZEUS drastically weakened
Hardware contributions
Maintenance of CFLTp and SRTD FLT probably not possible
Barrel presampler would be turned of
Conceivably the end of ZEUS (and HERA?)
Contribution to running of experiment with shift leaders
Physics analysis
Leadership of QCD group would be significantly weakened
Two students left hanging
Management
Rik would have to step down as spokesperson
Back to the question
Unique?
Unique contributions to ZEUS in the PAST due to
Excellent mechanical engineering
Assembly facilities
Excellent electronic engineering
Coupled with
Understanding of the underlying physics
Long expertise in building calorimeters
HRS EM, CDF EM, Soudan II, ZEUS, Minos, ATLAS, LCD
Expertise in Monte Carlo simulations
EGS for ZEUS, Geant4 for LCD
Expertise in photon/electron/jet identification
Prompt photon analysis on CDF, ZEUS
Jet physics on ZEUS
Heavy flavor physics on CDF, ZEUS
Deep understanding of QCD, DIS, etc…
Unique contributions to ZEUS NOW due to
Long term commitment to experiment (other people work on the LHC)
Unique knowledge of crucial components of ZEUS
Deep and broad understanding of physics (QCD)
Back to the question
Impact on other ANL projects?
CDF, ATLAS
Overlapping interest in
Structure Functions
Jet physics
Heavy flavors
CTEQ
Linear Collider Detector R&D
Applying expertise to development of hadron calorimeter
Strong ties with European groups through HERA community
Theory group
Common interest in
Quarkonia
Heavy flavor production
Jet physics
Conclusions
Exceptionally strong
ZEUS and HERA rely on it
Strong interaction with other
ANL projects
Physics involvement necessary for future projects
Broadening the US HE physics program