ic40 physics run preparations
DESCRIPTION
IC40 Physics Run Preparations. Erik Blaufuss – University of Maryland IceCube Science Advisory Committee May 5-6, 2008. The TFT board. TFT is a working committee within the collaboration charged with determining: Trigger and DAQ settings for physics data taking - PowerPoint PPT PresentationTRANSCRIPT
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IC40 Physics Run IC40 Physics Run PreparationsPreparationsErik Blaufuss – University of MarylandIceCube Science Advisory CommitteeMay 5-6, 2008
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The TFT boardThe TFT boardTFT is a working committee within the
collaboration charged with determining:◦ Trigger and DAQ settings for physics data
taking◦ Online filters deployed to Pole and their
settings.◦ TDRSS satellite bandwidth allocations.◦ Review allocations of non-physics data detector
allocations to support run coordinator◦ Determine allocations of CPU resources at Pole
TFT board members drawn from◦ Run coordinator◦ Subsystem experts (DAQ, online filtering)◦ Several experts from physics analysis and
simulation
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The TFT boardThe TFT board Physics working groups submit proposals for
triggers, filters, satellite bandwidth◦ Reviewed by TFT◦ TFT works to generate DAQ/filter settings
Tuning filters based on information provided in proposals TFT has an established filter evaluation criteria,
taking into account:◦ Matches physics goals of IceCube◦ Amount of resources being requested◦ Filter maturity◦ Results from previous years requests
No physics filter has had to be rejected to date◦ A handful of filters this season tuned down
somewhat to accommodate satellite bandwidth constraints. Small impact on physics signal in each case.
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IC40 FilteringIC40 FilteringIC40 physics run has already started.
◦ Began collecting data in IC40 configuration: April 11, Run 110811
All request trigger and DAQ settings implemented I3DAQ and TWR DAQ events being merged and taped
◦ Filters for IC40 deployed April 17, Run 110847
TDRSS bandwidth allocation well-filled.◦ Total: 37 GB/day◦ Slightly in excess of our goal of 35 GB/day but
TDRSS seems to be routinely delivering.CPU at pole ~85% loaded under normal
rate
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IC40 new triggersIC40 new triggersIn addition to majority triggers used in
previous years, this year has two new triggers:◦ 5 of 7 String trigger – Low energy muons
◦ ULEE trigger – 3 of 4 string trigger w/ large veto Experimental trigger/filter – very small rates. Aims to collect tracks ~10 GeV neutrinos
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IC40 Filters – Upgoing IC40 Filters – Upgoing muons muons Upgoing muon filter – single largest filter◦ Select upgoing events based on log-
likelihood reconstruction zenith angle using I3-only data Fully efficient at ~1 TeV.
◦ Aimed at use in ATM neutrino, Point source searches, and diffuse neutrino searches
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IC40 Filters – Low Energy IC40 Filters – Low Energy muons muons Three filters compliment standard
muon◦Aim for filter efficiency at or below 100 GeV◦Two use merged I3+TWR data◦Low energy atmospheric neutrinos, WIMPs◦Low-up filter –any LE event, I3+TWR, I3-
only◦JAMS filter – I3+TWR events with few I3 hits◦Low energy contained filter – vertical tracks
from I3 string triggers.
Low Up filter signal efficiency
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IC40 Filters – CascadesIC40 Filters – CascadesTwo cascade filters, both select events
based on event topology◦ I3 Cascade filter – higher energy cascades
in I3 DAQ data.◦ LE Cascade filter – lower energy cascade
sensitivity in region around denser AMANDA
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IC40 Filters - OthersIC40 Filters - OthersEHE filter
◦Aimed at GZK neutrinos, tau neutrino searches, exotic particle searches.
◦Selects any event with ~600 pe total charge
GRB filter◦Searching for neutrino (muon or
cascade) signal coincident with GCN alerts
◦Obtain raw data from 2 hour window around GRB time, apply special filters
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IC40 Filters - OthersIC40 Filters - OthersMoon filter
◦ Select cosmic ray events in region near moon◦ Use moon shadow to verify ability to see point sources
Downgoing contained filters◦ 2 filters: use upper/outer strings as active veto to search
Southern sky for neutrino sources◦ I3+TWR: seach for starting tracks near denser AMANDA
region, using I3 as veto◦ I3-only: use deep portions of central strings as fiducial
volume – Study for Deep CoreDST
◦ Record small event summary for all triggered events◦ Collect high statistics sample of cosmic ray events,
search for anisotropy, seasonal variations…
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IC40 Filters – By the IC40 Filters – By the Numbers.Numbers.IC40 trigger rate (I3+TWR) :
1340 HzIC40 filter rate: ~80 Hz, 6% (no
moon)
http://internal.icecube.wisc.edu/status/detector-summary.xml
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IC40 Filters – By the IC40 Filters – By the Numbers.Numbers.
GB/day
Total: 32.5 GB/day
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IC60 PlanningIC60 PlanningPreparations for next seasons physics run
are now just underway.“IC60” represents first year with a more
incremental upgrade.◦ # of strings not doubling◦ Online systems more mature◦ Much more advanced and capable simulation.
Expect similar start to physics run◦ Run IC40 filters until April 1, 2009
Earlier deadlines for IC60 TFT requests◦ September 1 : DAQ and trigger proposals◦ November 1 : Filter and bandwidth proposals
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Future filteringFuture filteringLooking for ways to do filtering better, and
considering several approaches.For more mature analyses, do more data
reduction online and return smaller fraction of data from Pole◦ Move higher level reduction steps to online filters◦ Point source/upgoing neutrinos for example
Tool to identify and tag/remove common atmospheric muon background.◦ Evolve to Level 1 filter for all neutrino filters◦ More advanced algorithms now useable online on
smaller fraction of data.◦ Needs collaboration-wide effort.