1. IceTop DAQ: 1 David Seckel – 8/27/2003, College Park, MD IceTop DAQ David Seckel University of Delaware

2. IceTop DAQ: 2 David Seckel – 8/27/2003, College Park, MD IceTop DAQ description Collect IceTop data using DOM/DOM Hub architecture Provide Science Data –Buffer data for inclusion in events –Provide trigger for showers - E s > 300 TeV –Provide trigger for horizontal showers - E s > 100 PeV (?) “Standard” IceCube functions (rapcal, monitoring…) Interface to IceCube DAQ

3. IceTop DAQ: 3 David Seckel – 8/27/2003, College Park, MD IceTop DAQ components IceTop Data Handler IceTop Data Handler HG Chan LG Chan. Tank 1 LG Chan HG Chan Tank 2 Station 1 Station 2 Station 80 DOM Hubs (10) IceTop Data Handler (SP) Vert. Sh. Trigger........ Global Trigger InIce DATA InIce Trig.Gen. On line ICETOP DAQ Hor. Sh. Trigger Common Event Builder DAQ Control Monitoring DOMs (320) 100 kB/s 32 MB/s 10 Hz

4. IceTop DAQ: 4 David Seckel – 8/27/2003, College Park, MD Software Configuration Items IceTop FPGA application DOM mainboard application DOM-Hub application IceTop post-hub processes –IceTop Data Handler –Shower Trigger –Horizontal Shower Trigger

5. IceTop DAQ: 5 David Seckel – 8/27/2003, College Park, MD Requirements I Science –Station hits – both tanks –Tank hits – muon like –Timing accuracy (10 ns) –Dynamic Range 1-10 5 PE Calibration (HG&LG) –Single PE –Flasher –Muon peak & Shower Threshold –HG/LG overlapping dynamic range –Pedestal

6. IceTop DAQ: 6 David Seckel – 8/27/2003, College Park, MD Requirements II Data Handling –IceTop buffered data (32 MB/s, 1 min 2 GB) –Orderly Progression of IceTop Data (critical availibility ?) Triggering –IceTop shower trigger (10 Hz) –IceTop horizontal shower trigger (<< 1 Hz) Constraints –IceTop DOM – DOM Hub communication bandwidth (100 KB/s/DOM) –Redundancy (reconfigure HG LG) Interface –Monitoring data –IceTop DAQ configuration –IceTop DAQ control