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CARIBU for applications

CARIBU for applications. Jason Clark ATLAS Users’ Meeting May 16, 2014. CARIBU (Californium Rare Isotope Breeder Upgrade) status. Have delivered both stopped and reaccelerated beams using 400 mCi 252 Cf source. More than 70 beams delivered to low-energy experimental area.

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CARIBU for applications

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  1. CARIBU for applications Jason Clark ATLAS Users’ Meeting May 16, 2014

  2. CARIBU (Californium Rare Isotope Breeder Upgrade) status • Have delivered both stopped and reaccelerated beams using 400 mCi 252Cf source • More than 70 beams delivered to low-energy experimental area • Also a handful of reaccelerated beams delivered • Now starting program with 1.7 Ci source

  3. CARIBU yield • Estimated yields can be found: http://www.phy.anl.gov/atlas/facility/caribu_beams_Nov13.html http://www.phy.anl.gov/atlas/facility/CaribuYields_Nov13.pdf • New estimated yields will be provided as we work with the 1.7 Ci source. 252Cf source properties: • 3% fission branch • 2.6 year halflife

  4. CARIBU stopped beam area Isobar separator Resolving power ~ 20,000 (select specific fragment) Gas catcher (collect fission fragments) 1.7 Ci 252Cf source ‘Stopped’ beam experimental area ATLAS X-ARRAY BPT Buncher,Elevator CPT TAPE STATION • Delivery of beam • to ‘stopped’ area through low-energy beamline Switchyard

  5. Low energy beamline – provides bunched beams Gas-filled RFQ “Elevator” 50 kV isolation Diagnostic station • Low energy beamline consists of gas-filled RFQ (buncher) to provide cooled, bunched beams to ‘stopped’ beam experimental area • Stopped beam area at ‘ground’ potential, therefore need ‘elevator’ to change 50 kV potential of ions (voltage on gas catcher deck)

  6. Stopped beam area • Delivers 1.5 kV to 10 kV beam to experimental stations • Pulsed beams with rates from ~ 100 ms to seconds • Low emittance • Experimental stations: EXO (2012) CPT (installed) TAPE STATION (installed) X-ARRAY (available) BPT (2015) LASER SPECTROSCOPY: After CPT move (2015) • Limited amount of space … removal of Tandem will provide new experimental area (2015)

  7. CARIBU with MR-TOF Isobar separator Resolving power ~ 20,000 (select specific fragment) Gas catcher (collect fission fragments) 1.7 Ci 252Cf source ‘Stopped’ beam experimental area ATLAS X-ARRAY BPT Buncher,Elevator MR-TOF CPT TAPE STATION • Delivery of beam • to ‘stopped’ area through low-energy beamline Switchyard

  8. MR-TOF (multi-reflection time-of-flight) • ‘Fast’ isobar separator: • Resolving power ~ 40,000 • Transmission ~ 50% • Takes ~ ms • Needs initial isobar separator to limit space charge • To be installed Summer 2014

  9. HELIOS GAMMASPHERE FMA Reaccelerated beams • CARIBU beams up to 12 MeV/u • 82.5 ns time structure of beam

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