IceCube Project Monthly Report February 2007

Transcription

1 IceCube Project Monthly Report February 2007 Accomplishments A total of 1424 IceCube DOMs are installed on the 22 strings and 52 IceTop tanks. Basic commissioning tests indicate that essentially all of the newly deployed DOMs survived the freeze-in and will be included in data taking operations. Detailed planning was completed for the remaining period of the construction project (April 1, 2007, through March 31, 2011) and baseline changes documenting the revised plans were approved. The changes result in a Total Project Cost of approximately $277 million and a contingency budget of $20 million, a reduction from roughly 30% of the work remaining to 25%. The Raytheon Polar Support Services revised baseline will be completed within the next two months and will result in a $2-3 million reduction in the remaining contingency budget. The Project Advisory Panel and Science Advisory Committee convened during a joint meeting on March 1-2, A report will be made available in the coming months. UW-Madison hosted a meeting with RPSC and IceCube collaborators on March 6 to review lessons from the past season and to confirm goals for the next season. NSF participated by telephone. On March 7 both groups met again to begin planning for the upcoming season. 100% IceCube Earned Value Performance 90% 80% Scheduled, 69.9% Cost, 69.5% Performed, 69.1% 70% Percent Complete 60% 50% 40% 30% 20% 10% IceCube Project Baseline (M$) Initial In-Ice Strings & IceTop Tanks Installed Jan-2005 Initial Operational Capability Mar-2007 Project Completion & Closeout Sep-2011 Total Project Cost $274.7 Value of Foreign Contributions $32.6 NSF Funding $242.1 Contingency as % of Remaining Costs 29.8% # Strings/Tanks 70/160 0% J-06 A-06 S-06 O-06 N-06 D-06 J-07 F-07 M-07 A-07 M-07 J-07 Scheduled 59.5% 60.9% 63.4% 65.0% 66.3% 68.3% 69.9% 73.1% 75.3% 76.3% 77.5% 78.6% Performed 58.6% 60.5% 62.6% 64.9% 65.8% 67.6% 69.1% Cost 59.0% 60.7% 62.6% 64.5% 66.3% 68.0% 69.5% July June 2007

2 Cost and Schedule Performance The project is 69.1% complete versus the plan of 69.9% complete, as measured using earned value techniques. The earned value measurement includes all tasks completed to date including design, development, procured materials, and the construction of the infrastructure that supports the seasonal installation plan, e.g., the hot water drill, cargo shipments, etc. The following table and chart present the earned value performance at a detailed level and the contingency status as a percentage of the remaining work. IceCube Neutrino Observatory Cost Schedule Status Report Reporting Period Ending: 1/31/2007 Budgeted Cost 2 Actual Cost Variance Contingency Latest Work Work of Work Budgeted Revised OBS Structure L2 Scheduled Performed Performed Schedule Cost Assigned % ETC AY $s Estimate Variance Sched Perf Project Support 20, , , , % 30, , % 66.9% 65.4% Implementation 26, , , , % 39, , , % 68.0% 70.4% Instrumentation 51, , , , % 68, , % 73.8% 73.2% Data Acquisition 27, , , % 34, , % 81.4% 80.6% Data Systems 18, , , , , % 25, , % 69.2% 74.8% Note 1 Cumulative To Date (AY K$) At Completion (AY K$) Note 5 Complete (%) Actl Cost Detector Comm. & Verification 13, , , , % 19, , % 69.2% 69.6% Subtotal 158, , , , , , % 217, , , % 72.0% 72.6% RPSC SUPPORT 16, , , , % 32, , , % 50.2% 49.4% NSF % 1, , % 52.8% 52.8% Total 175, , , , , , % 251, , , % 69.1% 69.5% CONTINGENCY Notes 3,4 23, , ,813.7 IceCube Total Note 2 175, , , , , , % 274, , % 69.1% 69.5% Notes: 1 Incorporates approved baseline changes. 2 Total Budget at Completion includes non-us contributions 2,915 K over the amount in the post Hartill III baseline of: 3 Budgeted contingency is: 29.8% of the Budgeted cost of work remaining. 4 Budgeted contingency is: 28.1% of the Estimated Cost to Complete (ETC) 5 All latest revised estimates equal the proposed revised baselines resulting from PY6-10 detailed planning. $29,698 K 40% IceCube Contingency (% of Work Remaining) 30% 29.8% 20% 10% Original Baseline Annual Baseline RePlan Annual Baseline RePlan Additional Installation Seasons 10nIceTop Stations 0% Jan-04 Apr-04 Jul-04 Oct-04 Jan-05 Apr-05 Jul-05 Oct-05 Jan-06 Apr-06 Jul-06 Oct-06 Jan-07 2

3 1/31/2007 Change Log - IceCube Total Project Budget Baseline ($K) No. Description Date Approved Total Baseline Allocated Budget Allocated Budget Change Contingency Budget Estimate To Complete (ETC) Budgeted Cost of Work Remaining Contingency % of Remaining Work NA Status as of Dec , ,503 23,182 89,417 81, % NA Status as of Jan , ,503 23,182 84,800 77, % Item Current PY5 Cost Variance will not be recovered Risk Assessment & Potential Contingency Adjustments Potential Contingency Adjustments $1,050K Notes Unbudgeted capital expenditures were made this year to increase storage at the pole and upgrade CPU cluster performance. Proposed Baseline Change from PY6-10 Planning. $3,502 Restore 80-string configuration $5,578K Assign 100 % of the cost to increase endstate configuration to 80-strings. Assume most probable yield. IceTop cables bought ahead. (7*704K+3*217K) Estimated 1.6 Baseline Change from PY6-10 Planning. Slow ramp up in M&O funding $3,000K TBD Scope and higher unit pricing will increase the RPSC out-year budget baseline. Assign 100 % of the contingency management assessed to be associated with the risk of delayed/reduced M&) funding. Drill Operation and String Installation Preliminary plans and a parts list were developed for the purpose of making minor modifications on the Independent Firn Drill. The Firn Drill will be an integral part of next season s plans and will decouple firn drilling from deep drilling, reducing the time between holes. Three sections of drill hose failed and required replacement during the last season. The damaged sections were shipped back to UW-Madison for inspection and testing and a working group was formed to help prepare plans for future seasons. The working group will recommend additional testing, possibly some minor design modifications, quantities of spares, and procedures related to the hose. The drill hose plans and will be reviewed by the Drill Advisory Committee in April. The winterization of the hot water drill in the dark sector on next season s equipment site and the reduced cycle times made possible by the Independent Firn Drill contribute to our confidence that it will be possible to drill holes next season. Digital Optical Module and Cable Production Status and Plans - There are no major issues with instrumentation production. The plans provide instrumentation well in advance of the 3

4 installation dates and support the use of the least expensive shipping methods. The actual status of DOM integration is provided in the following chart. IceCube DOM Integration PY5 (April, 2006 to March, 2007) - Plan vs. Actual DOMs ready for PSL - cumulative plan DOMs ready for DESY - cumulative plan DOMs ready for Swed - cumulative plan DOMs ready for DFL - cumulative plan all sites DOMs ready for DFL - cumulative actual all sites Quantity of DOMs ready for DFL /8/2006 4/22/2006 5/6/2006 5/20/2006 6/3/2006 6/17/2006 7/1/2006 7/15/2006 7/29/2006 8/12/2006 8/26/2006 9/9/2006 9/23/ /7/ /21/ /4/ /18/ /2/ /16/ /30/2006 1/13/2007 1/27/2007 2/10/2007 2/24/2007 3/10/2007 3/24/2007 Week ending South Pole DOMs A total of 1424 DOMs are deployed at the South Pole, 1320 on 22 strings and 104 in IceTop tanks. Over 98% of the DOMs are already in operation. A total of 780 DOMs on 13 in-ice strings were deployed this season. Only one of the new DOMs does not power up. Twelve DOMs display high current characteristics, but otherwise are operational. Three other DOMs are not communicating well, and two are not connected because of anomalous behavior. Detector Commissioning and Verification Initial verification and calibration data sets were acquired at the end of the season as planned. Basic timing tests performed using elements of the Verification test suite indicate that all newly-deployed DOMs are working well. This data and the hole-ice data acquired earlier are of sufficient quality for their intended purpose. More detailed studies of the hole-ice data are presently underway and we plan to have initial results by the end of April. Data continues to be acquired at Pole by the C&V group. Data for the initial geometry calibration of the newly deployed strings were brought north, analyzed, and initial constants were released in early February. This permits us to start using downstream analyses that rely on reasonably accurate initial geometry constants. Progress is being made in the use of muons to calibrate the relative DOM efficiencies and to study the detector geometry as a function of time. These efforts are being performed by physicists in Sweden with help from the University of California-Berkeley and Pennsylvania State University. We were able to address lingering AMANDA hardware issues with the arrival of several key personnel, mainly from Germany and Sweden, at Pole at the end of January. The salient problems were fixed before the station closed. 4

5 Data Acquisition System Hardware During the period from South Pole station close, February 18, to present, March 10, the IceCube DAQ has collected 41.2 million events to disk/tape. During this phase of engineering runs, which is expected to last through April, the trigger multiplicity was set high and the resulting event rate from the 22 string detector was Hz. Hardware trigger signals from the AMANDA array are being received, digitized, and inserted into the event data stream so that event data from the two detectors can be merged and the timing of hits between the two detectors can be resolved to nanosecond precision. The DAQ is still experiencing stability issues which are being investigated. It has been necessary to recode or even completely replace more software components ported from the older DAQ system than was anticipated at this early stage of continuing development. The debugging and code development work is proceeding on the SPTS64 test system which now hosts run simulations of strings used for evaluating the performance of the code under realistic conditions. Data Systems - The new IceCube Laboratory (ICL) was successfully commissioned at the South Pole in January. In February all South Pole systems in the ICL were commissioned and prepared for station close. Also, last month after station close the new South Pole data transfer satellite system was used for regular data transmission of commissioning data. We are sending on the order of GB/day. The data warehouse at UW was upgraded with more disk space to enable processing of the 2005 and 2006 TWR data tapes for physics analysis as well as the 2006 raw data tapes from the year long nine string run for verification activities. Continued development on the Joint-Event-Builder (JEB) will join the IceCube and Amanda TWR data streams into the PnF IceTray framework for online filtering of the joined events from the two arrays. First versions of the JEB/PnF are running at pole on both TWR DAQ and IceCube P-DAQ systems to pre scale engineering data for satellite transmission. The schedule calls for physics data taking and filtering to begin on May 1. Interfaces and system integration with P-DAQ, TWR-DAQ, experiment control and Spade at South Pole continues towards the milestone. There has been significant progress in database and IceTray tools and systems. The database has been expanded to include runtime information from the experiment control system and tools to use this data in the reconstruction code, both in the online filter and offline analysis modules, has been implemented. In addition, core I/O functions in the IceTray framework have been optimized for speed and benchmarking studies now show data transfer rates through the online JEB/PnF system at a factor of two over the anticipated data rate for the full 80 string detector. Simulation is developing well with the release of production version V This upgraded version is being used for large production runs with the official production processing system coordinated from UW. Testing and verification of the new production simulation has begun with comparisons to IC-9 data and the older simulation version. Work continues on using GRID computing for simulation production through the GLOW cluster at UW, and with the very beginning of participation with the OSG. 5

6 The first production version of Experiment Control was deployed at South Pole system and is being used for unified and coordinated control of all configurations and running of IceCube subsystems (i.e. p-daq, JEB/PnF/Spade/TWR-daq). The operator specified run conditions, along with other necessary run-start information is now being put into the online/offline database using the central experiment control system. Quality Assurance and Safety An Incident Reporting Log has been created to track personnel and equipment safety issues from the past Pole season. Also, a Drill Camp Preventive Maintenance Procedure is being worked on. This manual will help to define the parts and maintenance plans for each piece of the drill equipment. The manual will also establish boundaries for the maintenance effort between RPSC and IceCube. The monthly reports are posted at IceCube Monthly Reports. Construction Reports are posted at IceCube Weekly Construction Reports. Meetings and Events NSF Review of Revised M&O Plans and Research Program March 15-16, 2007 IOFG, Copenhagen, Denmark April 13, 2007 IceCube Collaboration Meeting, Lake Geneva, Wisconsin April 24-28, 2007 NSF Annual Review of the IceCube Project May 30-31, 2007 Cable Drag 6

7 Drill Operation Site Tower Operation Site 7