IceCube System Testing John Cavin 22 March 2005

Design / Verification Model System Engineering (Requirements) System Integration (Solutions) Project Science Goals Achieved Instrument Performance System Architecture Configuration Item Definition Detailed Design Requirements (Manufacturing) Detailed Measurements Incremental System Build-Up & On-going Assessment System Verification Comparisons between Requirements and achieved performance are made at each level in the System Hierarchy, starting with the simplest items and culminating in demonstration of overall instrument functionality.

IceCube System Testing Facilities Factory Acceptance Test (FAT) System Test Facility South Pole Test System (SPTS) South Pole System (SPS)

Other IceCube Testing Facilities SPLTS – LBNL DAQ subsystem test DOM MB Testing @ LBNL plus vendor testing Pensar – Board testing of flasher board, high voltage base Chiba – PMT testing

Factory Acceptance Test (FAT) Verify operation of newly manufactured DOMs Operate over temperature cycles Obtain calibration data Consists of facilities @ PSL, DESY, Uppsala: Dark Freezer Lab (DFL) TestDAQ software DOM Test software

South Pole Test System (SPTS) Operational configuration of deployed system Integrate software/hardware subsystems Test software in the “real” environment Test deployment methods Reproduce/debug problems in Northern Hemisphere Create the software versions that are released for use at the South Pole

South Pole System (SPS) Operational IceCube System at the South Pole

PY03 Deployment Questions Will the HW/SW deployed at the South Pole Work? How can we gain confidence and/or find show stoppers before we deploy?

PY03 Hardware Configuration Items (CI) and Functional Interfaces Surface Cable Assy Tank 1 In-Ice DOM Hub TCH Patch Panel Surface Junction Box IceTop DOM Surface to DOM Cable Assy In-Ice Instrumentation IceTop Freeze Power IceTop DOM Hub IceTop Freeze Control IceTop Freeze Power IceTop DOM T- DOM IceTop Freeze Control IceTop Freeze Power x 30 U- DOM IceTop Freeze Control Paro Tank 2 Keller

Created System Test Facility Provide a realistic test environment Test subsystems Interfaces End to end data transfer Consists of: DOMs in Chest Freezers Surface to DOM Cables Surface Junction Box Surface Cables DOMHubs Test Software and/or Operational Software

System Integration Testing Goals- First Season Discover issues associated with interfaces and device interactions prior to deployment Demonstrate basic operation of software and hardware in a realistic system configuration Demonstrate dataflow through the test system Demonstrate basic timing and local coincidence behavior Establish a readily accessible test-bed for interpreting SP system behavior Establish an off-line resource for continuing software development Begin formal verification of devices and subsystems

Demonstrated under controlled conditions: Simultaneous, stable, operation of In-Ice and IceTop DOM Simultaneous, stable, operation of Sensor Subsystem and IceTop Freeze Control / Power Subsystems Reliable DOM operation under realistic conditions No test DOM failures to date Reliable DOM Hub operation under realistic conditions One SBC card failure, root cause investigation still open

Formal Engineering Verification at System Level Capability is now in place for Sensor Subsystem verification Fundamental tests defined and waiting for operator resources to conduct: Part One: Establish Timing Baseline Part Two: TCAL Rate Sensitivity Analysis Part Three: Hit Input / Reporting Linearity Part Four: Communications Stability in the Presence of Noise Part Five: Timing Performance in the Presence of Noise Results can be available to support PY05 design decisions, but not in time to guide PY04

Scheduled Uses Complete timing and local coincidence testing – 30 Apr 2005 Investigate Quad 2 problem – 30 May 2005 Integration and Test of DOR Rev 1 cards, DAQ FPGA, and DAQ software – 1Jun 2005 thru 31 Jul 2005 Move System test facility – 31Jul 2005 – 30 Aug 2005 Support software testing – 1 Sep 2005 --- Noise sensitivity of communications and timing –

Results of PY03 System Testing Putting system together uncovered issues: Connector soldering problems Communication with IceTop DOMs on short cable Communication Testing over all cables Lots of work to do: Timing characterization under controlled environment Will utilize test resources to understand and interpret behavior observed on String 21 Integration and test of DOR Rev1, DAQ FPGA, DAQ software Support software development / check-out /certification prior to use at the pole.

Proposed Changes for Overall Testing Facilities Need to better utilize available space and resources

Conclusions Hardware and software testing will remain an important part of IceCube Capability exists to perform tests under a more controlled environment Released software will require rigorous testing before deployment to the South Pole PY03 testing contributed to success at South Pole