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 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 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 Filtering IC40 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 triggers In 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 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 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 – Cascades Two 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 - Others EHE filter GRB filter Cosmic Ray filters 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 Cosmic Ray filters Spectrum and composition of primary cosmic rays Atmospheric muon spectrum Calibration events between sub-detectors

IC40 Filters - Others Moon filter Downgoing contained filters DST 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 Core DST 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 Numbers. IC40 trigger rate (I3+TWR) : 1340 Hz IC40 filter rate: ~80 Hz, 6% (no moon) http://internal.icecube.wisc.edu/status/detector-summary.xml

IC40 Filters – By the Numbers. GB/day Total: 32.5 GB/day

IC60 Planning Preparations 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 filtering Looking 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.