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PHENIX Status

PHENIX Status. Continued Work on Detector Commissioning and Setup. Minbias trigger detectors setup Beam Quality – vertex, backgrounds Level-1 trigger setup DAQ development and setup. Vertex Distribution. Vertex distribution looks very nice! PHENIX BUP request (70% delivered in +/- 30cm).

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PHENIX Status

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  1. PHENIX Status • Continued Work on Detector Commissioning and Setup. • Minbias trigger detectors setup • Beam Quality – vertex, backgrounds • Level-1 trigger setup • DAQ development and setup J. Lajoie - RHIC Machine/Experiment Meeting

  2. Vertex Distribution • Vertex distribution looks very nice! • PHENIX BUP request (70% delivered in +/- 30cm) J. Lajoie - RHIC Machine/Experiment Meeting

  3. Main bunch Satellite bunches Satellite Bunches • Little intensity in satellite bunches • Doesn’t appear to grow dramatically within a store J. Lajoie - RHIC Machine/Experiment Meeting

  4. Backgrounds • Backgrounds, particularly in MUID North (yellow beam), have been a problem • Fixed with collimation early morning Jan 11 (thanks Angelika!) MuID N background counters ZDC coincidence MuID S background counters J. Lajoie - RHIC Machine/Experiment Meeting

  5. LL1 Data: Simulation: MuID LL1 Trigger Setup • New Level-1 Trigger for Muon Identifier: • South arm timed in and ready, north arm underway… Muon Identifier J. Lajoie - RHIC Machine/Experiment Meeting

  6. DAQ • Redesigned Event Builder up and running. • 24 subsystem elements (granules) • ~4.5kHz with six buffer boxes J. Lajoie - RHIC Machine/Experiment Meeting

  7. DAQ: Multi-Event Buffering • This year we will exercise a feature of our front-end electronics that allows concurrent readout and digitization. • Reduces dead-time at high trigger rates Single-Event Buffered Multi-Event Buffered Clock Ticks Between Events Note suppressed zero! J. Lajoie - RHIC Machine/Experiment Meeting

  8. Tests of Multievent Buffering • Need to evaluate the effect of multievent buffering on data • Alignment, calibration and production run on 3M events • QA ongoing, looks good so far Multi-Event Buffered: DT<500 clks Single-Event Buffered ZDC Energy BB Charge Sum J. Lajoie - RHIC Machine/Experiment Meeting

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