planning for the slac atlas program
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Planning for the SLAC ATLAS ProgramPage 1
Planning for the SLAC ATLAS Program
D. MacFarlaneDeputy ALD for PPA
Planning for the SLAC ATLAS ProgramPage 2
Background to the planning process
• SLAC is a relative newcomer to ATLAS, formally joining the collaboration in July 2006– Overall effort was about 15 FTEs in FY08, including faculty and staff
scientists, professional staff, postdocs, and graduate students• Curtailment of the B Factory program has accelerated the timeline for
evaluation areas of engagement on ATLAS, including upgrade R&D– ATLAS is the highest priority accelerator-based particle physics program at
SLAC going forward, driven by our assessment of the physics opportunities and the national priority enunciated by P-5 and HEPAP
• Discussions with OHEP in May led to the proposal that SLAC prepare a white paper with plans for this expanded ATLAS program– We concluded that it would be best to investigate opportunities in detail,
anticipating that the subsequent steps would thereby be better informed
Planning for the SLAC ATLAS ProgramPage 3
The ATLAS White Paper
• A White Paper has been developed to define in concrete terms the areas we see as a good match to our interests and expertise– Our approach has been to work bottoms up to understand specific needs,
future opportunities & our ability to contribute with effectiveness and impact – This process has also allowed us to define the potential interest within
laboratory staff, so that we now have a concrete model for the individuals, as well as their skills and interests
– Our approach has allowed us to make an independent assessment of opportunities and ATLAS needs
• We have used the White Paper as the basis for discussion with US ATLAS management in formulating an overall strategy with an integrated view of SLAC’s role– Discussions with US ATLAS management occurred on October 21,
November 6, and November 18– OHEP briefing occurred on October 8– US ATLAS management, OHEP program managers, and SLAC will meet
again in Germantown on January 7 to settle on a plan for FY09
Planning for the SLAC ATLAS ProgramPage 4
Potential impact on US ATLAS science & capability
• If the White Paper plan were implemented, the SLAC ATLAS Program would represent the largest single institutional effort in the US ATLAS community– Further growth would be anticipated as new people joining in FY09 ramp up
to full time– A Western Data Analysis Facility, although not yet proposed or incorporated
in the plan, could bring even more growth– However, with the exception of construction funding for future upgrade
projects, this plan fits within a constant level of effort model for the SLAC PPA program
• A large infusion from SLAC offers some real opportunities to further strengthen the US ATLAS community– US ATLAS is geographically dispersed with important eastern & western
communities that would be well served by strong local centers– SLAC team has the depth & core capability to sustain major hardware
system operations & upgrades, ATLAS computing & analysis support, while aiming to be a vibrant role in the US ATLAS physics community
Planning for the SLAC ATLAS ProgramPage 5
Organizing themes for the white paper
Theme 1: Existing & future upgrades for the Pixel SystemSections I.A, III.A, III.B, III.C, III.D, III.E, & III.G
Theme 2: Existing & future upgrades for DAQ and triggerSections I.B, & III.H
Theme 3: Simulations for the existing detector and upgradesSections I.E, & III.F
Theme 4: Tier 2 Center & potential Western Data Analysis Facility
Section II
Theme 5: SLAC and the Bay Area as a physics centerSection I.D, I.F, & IV
Planning for the SLAC ATLAS ProgramPage 6
Theme 1: Pixel System and tracking
• Current ATLAS effort: Pixel System operation– In partnership with LBNL, we have a significant and growing role on the
present Pixel System; engaged in commissioning, calibration, and now extending broadly into understanding and improving the performance of the tracking system as a whole
– More work in this area remains, particularly in the next few years, to fully understand and optimize the capabilities of this system
• Upgrade effort: Insertable B-Layer (IBL) project– Pixel inner B-layer will reach its radiation lifetime after a few years at 1034,
with extended 2012-2013 shutdown as the only window for intervention– ATLAS is moving rapidly towards mounting a project to construct an
insertable B layer (IBL) on this timescale, since replacement is not practical– Significant technical challenges need to be overcome for the compressed
schedule, suggesting an enhanced US effort will be essential for success – Working with LBNL and UCSC to understand what role is both appropriate
and sustainable for the US, e.g., end-of-stave to ROD services design and implementation, with SLAC as a significant partner in formulating a plan
Planning for the SLAC ATLAS ProgramPage 7
3650 mm
700 mm
First look at IBL installation & servicesM.Oriunno, N.Karita
ATLAS tracker upgrade meetingNIKHEF, Nov 5-7, 2008
PP1
PP0
Enlarged PP1 area
Mounting collar at PP0
Planning for the SLAC ATLAS ProgramPage 8
Theme 1: Pixel System and tracking
• Upgrade effort: replacement Pixel System– Approval of Stage 1 upgrade to the LHC, with a goal of 3x1034 luminosity in
2013-2017, necessitates upgrade of the existing Pixel System by about 2017 (after ~300 fb-1)
– Subject of recent pre-CD-0 JOG review, where significant questions arose about the time frame needed to construct the replacement system
– We believe that such an upgrade is inevitable and are working closely with LBNL and UCSC, and ATLAS as a whole, to develop a more detailed plan
• Upgrade R&D– Engaging in helping ATLAS reach conclusions about important technical
decisions, e.g., CO2 cooling, electrical design for prototype staves, data transmission & 3d pixel sensors
– Activities such as CO2 cooling anticipate, along with a new test stand, some of the infrastructure needed to sustain a major pixel test and assembly effort
Planning for the SLAC ATLAS ProgramPage 9
Phase 1 blown CO2 system under test
M.OriunnoATLAS tracker upgrade meeting
NIKHEF, Nov 5-7, 2008
Planning for the SLAC ATLAS ProgramPage 10
Theme 2: DAQ and HLT
• Current ATLAS effort: DAQ and HLT– System for prompt configuration of the HLT farm– Collaborating with CERN IT on CORAL server project for technology-
independent database access– Development of a partial event build capability for calibration data– HLT commissioning and trigger algorithm development– Development of online beam spot monitoring and distribution– Support for UCI and commissioning of the CSC ROD system
• Upgrade effort: some initial directions for DAQ and HLT– Will likely be more adiabatic effort, so only initial ideas discussed– Develop a HLT performance improvement program based on performance
monitoring and analysis capability (found to be very valuable at BABAR), and improved parallelism through data sharing
– Explore adapting generic ATCA-based DAQ platform to provide a high-performance integrated solution to DAQ requirements for ATLAS at the sLHC; may also provide an opportunity for a Level 1.5 trigger capability
Planning for the SLAC ATLAS ProgramPage 11
Possible upgrade path for ATLAS TDAQ
from L1
CIM
Rear Transition Module
10-GE switch
P3
Backplane
Rear Transition Module
switch managementL1 fanout 10-GE
switch
Shelf Management
10-GE switch
10-GE switch
P3
ROMs
CIM
To monitoring & control from L1
To L2 & Event Building
switch managementL1 fanout
(X12) 10 gb/s
(X2) 10 gb/s
(X2) 2.5 gb/s
836 RODs1574 ROLs537 ROBIns
68 PCs
235 ROMs45 CIMs
76 crates 25 crates
Would greatly simplify current system and scales to meet 1035 requirementsM.Huffer, G.Haller, R.Bartoldus, Su Dong
ATLAS TDAQ upgrade proposal
Read-Out Module
Cluster-Interconnect Module
ATCA crate with ROD & CIM
Planning for the SLAC ATLAS ProgramPage 12
Theme 3: Simulations
• Current ATLAS effort: GEANT4 core support and performance enhancement– Have emphasized speed optimization of the current simulation,
contributions to core muon simulation, optimization of field integration, physics validation, and other improvements to the code
– Contributions to the development of the capability for event overlay and zero-bias background event sampling
– Engaging at leadership level in next steps in performance improvement• Upgrade effort: Pixel and Tracking Systems layout studies
– ATLAS is proceeding quickly to make basic layout design decisions for the future Pixel and Silicon Tracker Systems
– We propose to use existing tools, either within the ATLAS simulation tool kit or in conjunction with the linear collider framework LCsim, to provide physics and performance guidance to these design decisions
Planning for the SLAC ATLAS ProgramPage 13
Theme 4: Tier 2 and Analysis Facility
• Planning for ATLAS computing and analysis well advanced, in a tiered and distributed model quite similar to that used by BABAR
• Tier 2 center at SLAC, representing about 20% of the installed BABAR computing hardware, is up and functioning well– When BABAR completes data reprocessing, ATLAS will benefit enormously from
large increase of available CPU cycles in the general queues• By end of 2010, the BABAR will complete its intense analysis period, and the
computing model will change significantly• At the same time, based on experience with BABAR and at the Tevatron, we
see many compute intensive operational or analysis needs that will require major consolidated computing resources– Physics tools and algorithm development based on multiple reprocessing of
significant fractions of ESD-level events– Alignment calibration & development based on calibration data streams– Development and validation of high level trigger algorithms
Planning for the SLAC ATLAS ProgramPage 14
Theme 4: Tier 2 and Analysis Facility
• In general, effective use of ATLAS data will require a system that is responsive to the demands of user-driven analyses and a close relationship between the analysis community and computing facility
• Sharing hardware resources between BABAR, ATLAS, and GLAST, while maintaining these systems with common personnel, will be both cost effective & more flexible in responding to demand
• Working to develop a proposal for a Western Data Analysis Facility in conjunction with US ATLAS and ATLAS computing management– Needs to account for anticipated migration of BABAR needs, and projected on-
site power and cooling constraints– Needs to quantify hardware and personnel requirements to meet the identified
or projected demand– Needs to integrate into US ATLAS and ATLAS planning based on initial
experience with data• Richard Mount is leading the development of a Analysis Facility proposal
with a 75% appointment in PPA
Planning for the SLAC ATLAS ProgramPage 15
Theme 5: The bay area as a west-coast ATLAS center
• CERN cannot host major portions of the LHC collaborations long term– Infrastructure does not exist to host such a community– Computing resources to support physics analysis are hosted elsewhere– Costs of sustaining a large US community in Geneva will be prohibitive
• As a regional center, the Bay Area and SLAC in particular can play a leading role in supporting the exploitation of LHC physics– Concentration of expertise on computing, analysis and detector systems– Proximity of physics analysis support centers, organization of workshops,
tutorials and seminars will be attractive– Strength of Theory Groups and their focus of interest in the LHC physics
program will be a source of analysis advice and ideas– Attractive training centers for students & postdocs, from a combination of
tutorials, available expertise, & participation in upgrade R&D activities• We are committed over the next several years to develop a community
and put in place the elements of a vibrant Bay Area center
Planning for the SLAC ATLAS ProgramPage 16
Budget planning
• A detailed budget model has been developed on the basis of a specific list of ATLAS and ATLAS upgrade participants and the White Paper activities
• This model assumes no growth in the SLAC core budget outside 3.5% inflation per year, and no growth in core PPA staff levels outside this constraint
• In our 10-year outlook plan, we do show an upgrade construction profile for ATLAS, but the preparation, R&D, and pre-engineering are assumed to be part of our core program
• Our focus in the White Paper is FY08 and FY09, pending further discussion with US ATLAS management– Relatively small FTE fractions for many upgrade participants will grow in out
years• Budget does not include an analysis of computing support budgets and
personnel, pending development of a detailed Analysis Facility model
Planning for the SLAC ATLAS ProgramPage 17
Budget Model: ATLAS
Growth of effort for existing ATLAS experiment
0.0
5.0
10.0
15.0
20.0
25.0
30.0
Phys
icis
t
Prof
essi
onal
Tech
/adm
in
Post
docs
Gra
duat
est
uden
ts
Tota
l
FTEs FY08
FY09
Growth of effort for existing ATLAS experiment
0
1000
2000
3000
4000
5000
6000
Phys
icis
t
Prof
essi
onal
Tech
/adm
in
Post
docs
Gra
duat
est
uden
ts
Tota
l
Dol
lars FY08
FY09
Model of FTE and budget in FY09 for the current ATLAS experiment alone
Planning for the SLAC ATLAS ProgramPage 18
Budget Model: ATLAS
Breakdown of ATLAS and ATLAS upgrade effort for FY09
0.0
5.0
10.0
15.0
20.0
25.0
30.0
35.0
Phys
icis
t
Prof
essi
onal
Tech
/adm
in
Post
docs
Gra
duat
est
uden
ts
Tota
l
FTEs Upgrades
ATLAS
Breakdow n of ATLAS and ATLAS upgrade effort for FY09
0
1000
2000
3000
4000
5000
6000
7000
Phys
icis
t
Prof
essi
onal
Tech
/adm
in
Post
docs
Gra
duat
est
uden
ts
Tota
l
Dol
lars Upgrades
ATLAS
Model of FTE and budget in FY09 for the current ATLAS experiment and upgrades
Planning for the SLAC ATLAS ProgramPage 19
Budget Model: ATLAS and ATLAS upgrades
Overall ATLAS and ATLAS upgrade effort
0.0
5.0
10.0
15.0
20.0
25.0
30.0
35.0
Phys
icis
t
Prof
essi
onal
Tech
/adm
in
Post
docs
Gra
duat
est
uden
ts
Tota
l
FTEs FY08
FY09
Overall ATLAS and ATLAS upgrade effort
0
1000
2000
3000
4000
5000
6000
7000
Phys
icis
t
Prof
essi
onal
Tech
/adm
in
Post
docs
Gra
duat
est
uden
ts
Tota
l
Dol
lars FY08
FY09
Growth of FTE and budget from FY08 to FY09 for the overall ATLAS program
Planning for the SLAC ATLAS ProgramPage 20
Budget Model: ATLAS and ATLAS upgrades
FY 2007-2009 Total M$ by Cost TypeATLAS
0123456789
10
FY07 FY08 FY09(
M$
)
Labor M&S Allocation of PPA DPS
FY 2009 FTE by Job CategoryATLAS
Engineer / Computing
Professional, 9.3
Administrative / Technician,
0.8
Graduate Students, 2.1
Temporary PhD, 6.2
Permanent PhD, 13.0
Total FTE: 31.3
Breakdown of overall FTE plan and evolution of fully burdened budget
Planning for the SLAC ATLAS ProgramPage 21
Summary
• White Paper provides a detailed model for a significantly expanded SLAC role on ATLAS and the beginnings of an upgrade R&D effort– Model is the result of a bottoms up look at opportunities, matched against
strengths, expertise, and interests– Ideas for an expanded computing role have been suggested and we are
now in the process of developing a concrete proposal in consultation with US ATLAS and ATLAS management
– Model helps us define the set of possible tasks and the staff who would be interested in taking on a role in ATLAS or the ATLAS upgrades
• We are presently discussing this model with US ATLAS management and OHEP to produce a coherent strategic plan with an integrated set of roles for the SLAC ATLAS Program– May result in some changes in emphasis in program, and some changes in
assumed program funding streams, e.g., ATLAS M&O and Detector R&D– The influx and rapid growth of the SLAC ATLAS program is a significant
enhancement to the existing US ATLAS effort and the strength of the US ATLAS R&D effort
Planning for the SLAC ATLAS ProgramPage 22
Backup material
Planning for the SLAC ATLAS ProgramPage 23
Current working model for ATLAS program
Planning for the SLAC ATLAS ProgramPage 24
Possible ATLAS growth profile
0.00
2.00
4.00
6.00
8.00
10.00
12.00
14.00
16.00
18.00
20.00
2008 2009 2010 2011 2012 2013 2014 2015 2016
$M
ATLAS upgrade
ATLAS M&O
ATLAS research
Assumptions: Growth in FTE fraction for FY09 personnel and no SuperB program, leading to additional staff influx following BABAR intense-analysis phase in 2011
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