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IceTop Science. Calibration - (x, E, q ) Validation – tagging 5% ( m ) Veto – 1 km 2 sr, E > 100 TeV (?) Cosmic ray & particle physics. Two Ice Tanks 3.6 m 2 x 1 m. To DAQ. IceCube Drill Hole. Two DOMs: 10” PMT High Gain w/station coincidence: 1 p.e. resol Low Gain: 1 m resol. LG.
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IceTop Science • Calibration - (x, E, q) • Validation – tagging 5% (m) • Veto – 1 km2 sr, E > 100 TeV (?) • Cosmic ray & particle physics D. Seckel
Two Ice Tanks 3.6 m2 x 1 m To DAQ IceCube Drill Hole Two DOMs: 10” PMT High Gain w/station coincidence: 1 p.e. resol Low Gain: 1 mresol LG HG HG LG ~15 m IceTop Station Schematic D. Seckel
Data Types & Rates • Single “Tank hits” (Muons + Ee > 30 MeV [tbd]) • id (1), time (4), fit parameters(7) – 12 bytes [possible] • 2500 Hz * 12 B = 30 KBps/DOM • Soft Component: “Station hits” • Check for local coincidence (two tanks) • Rshowers ~ 50-100 Hz • Runcorrelated coincidence ~ 1.25 Hz (For 2500 Hz, 100 ns) • Mostly simple fits < 1 KBps/DOM • Waveforms • 95% consistent with impulsive event: FX data only • 5% not impulsive, return compressed waveform: CWF ~ 100 B • rate 100 Hz + Scaled selection of minimum bias events ~ 10 Hz • 200 Hz * 100 B = 20 KBps/DOM D. Seckel
Requirements D. Seckel
Common Event Builder IceTop DAQ components Monitoring DOMs (320) LG DOM Tank 1 InIce Trig.Gen. Vert. Sh. Trigger HG DOM Station 1 DOM Hubs (10) 10 Hz Hor. Sh. Trigger HG DOM Tank 2 IceTop Data Handler IceTop Data Handler LG DOM IceTop Data Handler (IDH) Global Trigger Station 2 DAQ Control 32 MB/s . . . . 100 kB/s Station 80 On line InIce DATA D. Seckel
IceTop FPGA Projection of muon waveform onto four basis functions & reconstruction. Rate + Bandwidth m: Advanced feature recognition Þ Shower vs Background e+ e– g: 2-tank coincidence Þ 2-level trigger, fast ATWD decision Rate + Livetime Þ 10 ns + synch. trigger Advanced feature recognition Þ Projection of string-18 SPE waveform w/pedestal & reconstruction. D. Seckel
IDH and Trigger Separate Monitor Data Monitoring Time Correction In-Ice Trigger DAQ Control Pre-process Science Data Shower Trigger Hubs Horz. Shower Trigger Calibration Trigger IceTop Data Buffers Global Trigger IceTop DB Access Common Event Builder Online D. Seckel
IceTop DAQ Development • Requirements • Acquire Test Data • Digital design • Design Þ Firmware • Bench test • PY-03 Pole-DAQ • Requirements • Modify In-Ice DAQ • Test at UD-station • Review (9-1-04) • Install & Test • Deliver • Pre-DAQ Design & Test • FPGA • IDH & Triggers • Review Components • Deliver algorithms/data formats/implementations FPGA • 4 months • IceTop DAQ v1 • Initial Design • Interface with In-Ice FPGA • Implement and bench test • SW – inc. IDH & Triggers • Test at UD-station • Assessment 8-31-2004 1-31-2005 } • Acquire DAQ Simulation • SPE, muon, shower • High Gain, Low Gain • Coincidence logic UD Test • IceTop DAQ v1.1 • Monitoring • Calibration 5-31-2005 • IceTop DAQ v2 • Design Review • Build • Test at UD-station • Station test at Pole • Array test at Pole 7-31-2005 • In-Ice/IceTop Integrated DAQ • CONUS tests • Tests at Pole • Acceptance Milestone 2-28-2006 6-30-2006 D. Seckel
Issues • Discovery phase for FPGA • Requirements for yr 1 DAQ • Linearity of LG DOMs • Performance of IDH/trigger D. Seckel