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

2. IceTop DAQ: 2 David Seckel – 8/27/2003, College Park, MD IDH & Trigger IceTop Data Handler –Channels data from Hub to … Timing summaries to triggers Manage IceTop Data Buffer Monitor stream –Timing corrections Triggers –Shower trigger 4x station hits –Horizontal triggers N x muons (single tanks) + timing cut

3. IceTop DAQ: 3 David Seckel – 8/27/2003, College Park, MD IDH and Trigger Shower Trigger Time Correction Common Event Builder Global Trigger Hubs Separate Monitor Data Create stream for “station hits” Create stream for “tank hits” IceTop Data Buffer Post trigger data retrieval Monitoring Online In-Ice Trigger Horiz. Shower Trigger Trap calibration data Time Control DAQ Control

4. IceTop DAQ: 4 David Seckel – 8/27/2003, College Park, MD Requirements Data Rate ( 32 MB/s) Data Retention –1 min –2 GB Data progression Monitor Data Stream Time Correction Triggers –Shower trigger (4x in 5000 ns) –Horizontal trigger (5x-15x in 5000 ns) Two level (topology ?) –Calibration events ?

5. IceTop DAQ: 5 David Seckel – 8/27/2003, College Park, MD Development Plans Rely on Test DAQ availibility Develop IDH at UD test station IDH/Triggers tested under simulated load