IC40 Physics Run IC40 Physics Run PreparationsPreparationsErik Blaufuss – University of MarylandIceCube Science Advisory CommitteeMay 5-6, 2008

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

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.

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

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

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

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

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

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

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…

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

IC40 Filters – By the IC40 Filters – By the Numbers.Numbers.

GB/day

Total: 32.5 GB/day

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

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.