The Ice Top component of Ice Cube Areasolidangle

The Ice. Top component of Ice. Cube Area--solid-angle ~ 1/3 km 2 sr (including angular dependence of EAS trigger) Jan 16, 2004 Tom Gaisser 1. 3 Cost & schedule review

Outline • Scientific goals • Pictures of test-tanks & Doms, 03/04 • Cost & schedule review – WBS structure & definitions – Schedule – Budget Jan 16, 2004 Tom Gaisser 1. 3 Cost & schedule review

Ice. Top: the surface component of Ice. Cube • A 3 -dimensional air shower array for – – Veto (i. e. tagging downward events) Calibration Primary composition from Pe. V to Ee. V Calibration, composition analyses similar to SPASE-AMANDA but • 5000 x larger acceptance • wider energy range, better resolution • Ice. Top at high altitude (700 g/cm 2) – 125 m spacing between Ice. Top stations – Ethreshold ~ 300 Te. V for > 4 stations in coincidence – Useful rate to Ee. V Jan 16, 2004 Tom Gaisser 1. 3 Cost & schedule review

Showers triggering 4 stations give ~300 Te. V threshold for EAS array Large showers with E ~ 100 -1000 Pe. V will clarify transition from galactic to extra-galactic cosmic rays. Small showers (2 -10 Te. V) associated with the dominant m background in the deep detector are detected as 2 -tank coincidences at a station. Detection efficiency ~ 5% Jan 16, 2004 provides large sample to study this background. Tom Gaisser 1. 3 Cost & schedule review

Ice. Top station schematic Two Ice Tanks 3. 1 m 2 x 1 m deep (a la Haverah, Auger) • Coincidence between tanks = potential air shower • Signal in single tank = potential muon • Significant area for horizontal muons • Low Gain/High Gain operation to achieve dynamic range Tank simulation with GEANT-4 Jan 16, 2004 Tom Gaisser 1. 3 Cost & schedule review

Fill tanks • Tank 10 – Successful fill Nov 22 • 20 minutes to fill • < 10 RPSC man hours for transport and filling • Tank 09 – Filled Nov 26 Jan 16, 2004 Tom Gaisser 1. 3 Cost & schedule review

Cable runs looking toward MAPO away from SPASE Tank 10 is on the right, Tank 09 on the left. Power cable is on the left. There are 5 cables on the right: 2 freeze-control cables, two twisted quads for DOMS, and Stoyan’s cable to read temperatures during the winter. The latter is somewhat thicker than the other four. Jan 16, 2004 Tom Gaisser 1. 3 Cost & schedule review

4 Ice. Cube DOMs running From: SMTP%"john. kelley@usap. gov" 15 -JAN-2004 15: 56: 19. 45 To: icecube-c@ssec. wisc. edu Subj: First Four Ice. Cube DOMs Deployed I'm pleased to report that the first four Ice. Cube digital optical modules have been successfully deployed at the pole. They are currently frozen into two Ice. Top surface tanks, located near the SPASE building. The DOMs are operating normally, and we are looking forward to dark-adapting the tanks and taking real data. John Kelley, UW-Madison Jan 16, 2004 Tom Gaisser 1. 3 Cost & schedule review

WBS structure • 1. 3. 2 Ice. Top is the surface component of Ice. Cube. By detecting cosmic-ray showers in coincidence with the deep detector it provides certain unique calibration and veto functions for neutrino astronomy in addition to permitting Ice. Cube to function as a three-dimensional air shower array for study of cosmic-ray astrophysics up to Pe. V energies. – 1. 3. 2. 1 Tanks – 1. 3. 2. 2 Cables – 1. 3. 2. 3 DOMs – 1. 3. 2. 4 Ice. Top specific engineering • 1. 3. 2. 4. 1 system design • 1. 3. 2. 4. 2 detector simulations • 1. 3. 2. 4. 3 Data acquisition – Integration of SPASE – Ice. Top management Jan 16, 2004 Tom Gaisser 1. 3 Cost & schedule review

Tanks, DOMs, Cables deployment and Design and build tanks; design and test freezing procedures to provide working ice-Cherenkov detectors for the surface array component of Ice. Cube. Exclusion: Provision of water to fill the tanks is excluded because it will be an integral part of deployment (see 1. 2. 3. 3. 4 under 1. 2. 3. 3 Field Season Operations). There is also a need for coordination with drilling (1. 2. 2) in connection with water supply. Tank deployment is under 1. 2. • 1. 3. 2. 1 Tanks of cabling to power and monitor freezing, testing • 1. 3. 2. 2 Cables Specification and operation of tanks. Exclusion: Cabling for tank DOMs should be included in the main surface cables (1. 3. 1. 2). We assume the surface cable will include conductors suitable for monitoring the tanks and for providing power during deployment. ( Connections from the DOMs to the surface cables must be Provided, as well as cables connecting the DOMs to each other. (1. 3. 1 • 1. 3. 2. 3 DOMs Jan 16, 2004 Develop FAT & verification test for Ice. Top DOMs Integration of optical modules into tanks. Exclusion: Construction of DOMs is excluded because the DOMs for Ice. Top will be part of DOM production runs (1. 3. 1. 1). Design of modifications that may be needed for Ice. Top will be carried out in collaboration with 1. 3. 3 and 1. 3. 4 as part of Ice. Top specific engineering (1. 3. 2. 4). Tom Gaisser 1. 3 Cost & schedule review

1. 3. 2. 4 Ice. Top Specific Engineering Design, Maintenance, calibration and operation of the surface component of Ice. Cube to the extent that these require special procedures. Ice. Top is an integral component of the Ice. Cube detector. To a large extent, both its hardware and software components are similar, if not identical, to those of the deep detector. This element includes integration of air shower detector calibration, DAQ, trigger, reconstruction and simulation into the corresponding Ice. Cube processes. • 1. 3. 2. 4. 1 System design Engineering resources Develop engineering resources necessary for the design, verification, calibration and operation of Ice. Top components. This includes an Ice. Top instrumentation and development facility and a tank test station on campus at U of Delaware, a tank test station at UW River Falls, mobile test tanks and a tank test station at the SPASE. • 1. 3. 2. 4. 2 Detector simulations Develop simulations needed for Ice. Top design, verification, calibration and operation. Develop air shower simulations of common interest for Ice. Top and for simulation of backgrounds in the deep detector (in coordination with WBS 1. 4. 3). e. g. simulation of tank response, simulations for triggering are in this WBS; simulations for background In Ice. Cube are under 1. 4. 3. 1 • 1. 3. 2. 4. 3 Data acquisition add. 4. 4 and. 4. 5 Design, specify and produce Ice. Top-specific DAQ firmware and software components, including triggering and feature extraction algorithms in the on-board FPGA and software for data handling, triggering and reconstruction. Specify requirements For Ice. Top mainboards, including any variations from mainboards to be used in ice. Coordinate with related activities in WBS elements 1. 3. 4, 1. 4 and 1. 5. Jan 16, 2004 Tom Gaisser 1. 3 Cost & schedule review

SPASE • 1. 3. 2. 5 Integration of SPASE Maintenance and operation of the existing SPASE air shower detector to the extent it remains useful as a calibration device for Ice. Cube. Lower threshold subsample of coincidences; tank calibration • 1. 3. 2. 6 Ice. Top management Local project monitoring and reporting to project office. Jan 16, 2004 Tom Gaisser 1. 3 Cost & schedule review

Schedule Strings deployed Tanks deployed manufctd (accel) PY 3 PY 4 PY 5 PY 6 PY 7 PY 8 4 12 16 18 18 12 8 24 32 36 36 24 8 24 32 96 Freeze units (*) 8 (+2? ) 16 (+2? ) 12 manufctd (accel) 0 • Assumes each freeze unit reused up to 5 times. Probably should add some extras Jan 16, 2004 Tom Gaisser 1. 3 Cost & schedule review PY 9

Hardware costs • Capital – – – – Tanks: 160 @ $6037 = Frz units: 36 @ $6002 = O’flow units 36 @ $ 561 = Sunshade 36 @ $1922 = Misc Tank Equip Test station Equip (inc. $45 K at UWRF) 4 test station tanks + ancillary equip Computer cluster • Total capital Jan 16, 2004 $965, 920 216, 072 20, 196 69, 129 38, 550 75, 000 60, 000 180, 000 $1, 564, 867 (+$60 K) Tom Gaisser 1. 3 Cost & schedule review

Materials & supplies (inc shipping) + travel (both unburdened) • 1. 3. 2. 1 Tanks $ 18, 850 – (not enough for shipping) • 1. 3. 2. 4. 1 (Test stations) • 1. 3. 2. 4. 3 – DAQ computers – Misc hardware • • 1. 3. 2. 5 1. 3. 2. 6 Total M & S Travel Jan 16, 2004 31, 000 27, 000 reduce to $15 K, move to. 4. 1 100, 750 move to. 4. 1 -00048, 000 (replacement work stns) $225, 600 $549, 000 Tom Gaisser 1. 3 Cost & schedule review

Labor breakdown • By institution person months (total project) – UD: 572, UW: 87, LBNL: 8, • Individuals involved part-time Scientists: 13 1 0 Engrs, techs: 5 1 2 • Labor cost by Project year (burdened) PY 3 4 1. 23 Total: $6. 64 M Jan 16, 2004 5 1. 14 6 1. 00 7 0. 81 Tom Gaisser 1. 3 Cost & schedule review 8 0. 70 UWRF: 7 1 9 0. 32 10 0. 16