IceCube construction status Albrecht Karle PAP/SAC meeting Madison, March 1, 2007

IceCube 2007: IC22 IceCube array 70+ strings and IceTop stations planned 22 strings and 1320 DOMs installed 26 IceTop stations with 104 DOMs installed

2005, 2006, 2007 Deployments 1+ 9 + 13 = 22 strings to date AMANDA 1+ 9 + 13 = 22 strings to date 46 47 48 58 57 66 67 74 65 73 78 56 72 IceCube string deployed 01/05 IceCube string deployed 12/05 – 01/06 21 30 29 40 50 39 38 49 59 IceCube string and IceTop station deployed 12/06 – 01/07 IceCube Lab commissioned 1424 DOMs deployed to date Next year looking for 14 to 18 strings. Want to achieve steady state of >= 14 strings / season.

Hotwater drilling: Trend towards increasingly stable operation continued. Experienced crew

Drilling and deployment timelines 10 h 36 h

Drilling and Deployment cycle Ice drilling on next hole begins while previous string is being secured, Highly parallelized operation Lunch break Identify leak in hose, Identify, pull back, Prepare action, Replace segment, Drill again* ~10h Typicallly ~33h *Simplified description of event ~51 hours/cycle

Drill and deployment durations

Independent firn drill Based on electrical power (150 kW), eliminates need of EHWD for firn drilling. Successfully used for three holes. Expected to save about 12 to 15 h per drill cycle - 2 holes per season!

2006 as built - 2008 preliminary plan Drill camp 2007/08 Already in place, Hope to gain 2 holes! See posters for detailed viewing

Experienced field team deals very well with issues and harsh conditions.

IceTop – the Surface Airshower Detector 26 stations deployed All tanks (160+) built. Freezing process improved due to better insulation. Continue with successful deployment. Strategy: continue to stay a few stations ahead of the string installation (max 18 next season.)

Primeminister of New Zealand, Helen Clark and the Director of the NSF, Dr. Arden L. Bement visit the South Pole, signing a DOM.

DOM production Production on track on all sites ~1450 DOMs built today 540 DOMs in McMurdo or at South Pole at present.

Cable production - surface to DOM cables To date: 54 cables shipped from Ericsson

DAQ S/W Status November 2006 - project adopts plan for DAQ S/W streamlining: Goals: Simplification and streamlining Allow for lower maintenance budget, less complexity, minimize need for CS professionals in DAQ Improve accessibility for scientists. January 29th, 2007 - begin integration of DAQ at South Pole. February 21st, 2007 - SPS closed. 22 in-ice strings, 26 IceTop stations, and AMANDA detector integrated into DAQ. Improvements Code is simpler - 117k lines of Java / 15k Python as compared to > 300k lines of Java before. Less computing hosts (save 9 hosts ~ 1 plane of fuel/year) Configuration server system is simple and flexible: No more need for separate testing framework. (Each developer can run DAQ on a laptop for development work.) Turn-around time is very fast as compared to previous system: 30 s for complete deploy and start-up to running state as compared to 10 min. This enables quick edit-compile-debug looping.

Issues / TODO pDAQ is not in stable running at Pole with 22 strings I/O system from rDAQ is suspected as not being able to keep up to rate of hits at InIceTrigger component. A rewrite is underway but was not completed prior to close of Pole. Estimate 10-15 days to resolve. Data is still being taken in HLC (hard local coincidence triggering on the DOM) / engineering format. Events are big. Need to get compressed hit formats working to reduce event volume by factor of 3-5x then work on bringing up isolated hits. Support for flasher board calibration runs pending.

Neutrino event

IceCube Lab (ICL) IceCube lab commissioned, South Pole computing system (SPS), all racks and infrastructure installed, 64 bit implemented on SPS and SPTS, About 10 racks of computers and hubs. Working simulation, exp control, PnF IceCube Lab (ICL) Temporary ICL, Now removed Independent Firn Drill

On-Ice organization

Construction Project orgchart IceCube International Oversight and Finance Group NSF, Executive Agent IceCube Collaboration IceCube Neutrino Observatory J. Yeck, Project Director R. Paulos, Associate Director A. Karle, Associate Director Engineering & Project Support Science & Instrumentation Safety and QA Manager, M. Zernick Logistics Manager, T. Hannaford Software Coordinator, TBD Advisory and Oversight Groups UW Leadership Team Science Advisory Committee, M. Schaevitz (Chair) Project Advisory Panel, J. Marx (Chair) Hot Water Drill Advisory Panel, M. Mulligan (Chair) A3RI & Project Support R. Paulos Accounting, N. Odalen Resource Coordinator, D. Laitsch E&O, E. Malkus Human Resources, T. Wipperfurth IT Support, M. Mueller KRC Business & PSL Technical Services F. Halzen Principal Investigator Co-Spokesperson IceCube Collaboration Board C. Spiering, Spokesperson Detector Operations Run Coordinator A. Goldschmidt Project Controls P. Nipko Engineering R. Paulos (A) J. Cavin* RPSC Support S. Clapp Drilling & String Installation T. Hutchings Instrumentation J. Haugen Data Acquisition K. Hanson B. Edwards Data Systems G. Sullivan Detector Comm&Verification D. Cowen Planning P. Nipko Monitoring & Analysis A. Peles Change Management B. Ziegler Funds & Acct. Interface L. Riley Electrical Engineering P. Sandstrom Mechanical Engineering J. Cherwinka System Testing A. Laundrie Software D. Wharton South Pole Labs S. Cantley Drill A. Elcheick System Engineering J. Cherwinka String Installation T. Ham Optical Modules J. Haugen IceTop T. Gaisser Cables/Special Devices J. Baccus DAQ Hardware D. Nygren J. Joseph DAQ Software C. McParland Experiment Control S. Patton Data Handling D. Schneider Data Filter/Software E. Blaufuss Simulations K. Hultqvist Verification/Benchmarks G. Hill Reconstruction S. Schlenstadt Characterization K. Woschnagg AMANDA/I3 Integration T. DeYoung June 8, 2006 Effective Date Legend Project Direction and Reporting Project Advice and Recommendations Project Support (A) - Acting

Maintenance & Operations Orgchart International Oversight and Finance Group NSF, Executive Agent IceCube Collaboration Collaboration Spokesperson Collaboration Board Executive Committee DRAFT IceCube Neutrino Observatory Principal Investigator Director of Operations Software Coordination Education & Outreach Science Advisory Committee A3RI & Project Support Operations Support R&D Administrative Support Tech Support Logistics RPSC Detector Operations Trigger Filter Transmit Board Science Operations Computing Data Center DESY MC Production Europe Northern Data Center Metadata & Database Support Data Distribution Data Storage Software & Data Processing Data Production Filtering & Software Systems Reconstruction Software Online Filtering Simulation Data Integrity Detector Calibration Data Verification Offline Filtering Software Tier 2 Support Monte Carlo Offline Data Run Coordination Detector Monitoring Online Processing DAQ Detector Hardware SPS Data Handling AMANDA Winter Overs SPTS Effective Date

IceCube field team January 28, 2007 50 team members on the ice from Oct to early February 30 drillers, 20 technicians and scientists

Summary Experience from last year: Drill system capable of sustained operation at high rate for entire season Digital optical module is manufacturable in large quantities and is robust: >1400 DOMs in the ice. DOM Survival rates are very good. The 22 strings and 26 surface stations in operation. Surface DAQ SW revised; confident to reach stable operation with 22 strings soon. The detector and data system is being exercised end to end. String deployment plan: plan 14, up to18 strings next year. Looking to reach target of 75+ strings. Detector is ready for operations.