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ACTAR @ HIE-ISOLDE Experimental requirements

ACTAR @ HIE-ISOLDE Experimental requirements. Riccardo Raabe Instituut voor Kern- en Stralingsfysica , K.U.Leuven. The active target detector. Time-projection chamber with detection gas as target Thick target High efficiency Tracking, identification Spatial resolution Low thresholds.

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ACTAR @ HIE-ISOLDE Experimental requirements

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  1. ACTAR @ HIE-ISOLDEExperimental requirements RiccardoRaabe Instituutvoor Kern- en Stralingsfysica, K.U.Leuven

  2. The active target detector Time-projection chamberwith detection gas as target Thick targetHigh efficiencyTracking, identificationSpatial resolutionLow thresholds Well-adapted for usewith the weakest RIBs

  3. The active target detector Time-projection chamberwith detection gas as target Thick targetHigh efficiencyTracking, identificationSpatial resolutionLow thresholds Well-adapted for usewith the weakest RIBs Beam

  4. Experience with Maya@REX-ISOLDE (IS520) Problems encountered Beam contamination (12C in 12Be beam)→ Possibilities at HIE-ISOLDE: degraders, separators High instantaneous rateand correlation between particles→ Faster electronics to count beam→ Reduce beam signal (mask)→ Focus on off-beam tracks Lots of lessons learnt ACTAR at HIE-ISOLDE will work!

  5. Beam requirements Instantaneous rate is a limit Creation of ionisation charges Count rate Actual limit ≈105-106pps inst.  < 103pps • Spread the beam pulses as much as possible • Keep contaminationto a minimum • Divergence < 10 mrad • E resolution <1% • AstrophysicsEnergy < 0.7 MeV/nucleon

  6. Setup and footprint In combination with the solenoid?

  7. Setup and footprint Stand-alone

  8. Setup and footprint Stand-alone

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