Overview of ReA Facility D.J. Morrissey Associate Director of - PowerPoint PPT Presentation

Overview of ReA Facility D.J. Morrissey Associate Director of Operations

Outline • Coupled Cyclotron Facility Operations Perspective WRT ReA beams • ReA Accelerator Facility Overview • ReA3 complete • ReA6 prototype tested • ReA12 concept and area DJMorrissey, LowEnergyUserMeeting 2015 2

What do we need from CCF ? • The CCF has operated for 14 years, generally in excess of 4000 hours/year, at ≈ 90% availability to support the scientific program • Secondary beams from projectile fragmentation and delivered within 24 hours of published schedule to experiments. [LISE++ provides excellent predictions] • Thermalized beam program began ≈ 10 years ago as an experiment, now staff-supported program. [mature technique, reasonably predictable] >1000 RIBs produced & ID’ed > 900 RIBs used in experiments > 25 RIBs thermalized (of 19 chemical elements) DJMorrissey, LowEnergyUserMeeting 2015 3

Facility Layout & Major Equipment SECAR (2015 -) ANASEN, FSU/LSU/TAMU (2013) JENSA (2014) SuN (2012) BECOLA (2011) CFFD (2015) LEBIT (moved 2011) 20 meter JANUS (2014) AT-TPC (2014) SIPT (2015) Positron Polarimeter (2015/16) Cycstopper off line (2014/15) MoNA (2003) Momentum Compression (2010) Helium Jet (2016/17) LISA (2010) ReA3 ANL Gas Catcher (2012) Lines K500 Sweeper Cyclotron Stopper (2016) (2014) Cyclotron ECR Magnet (2004) Cryogenic Gas Stopper (2017) ReA6 CM (2015) Ion Sources ReAccelerator Facility (2013), CM3 (2015) Space for future expansion of the science program Low-Energy Beam Line (2012) K1200 SEETF (2003) SeGA S800 (1996) BCS Cyclotron EBIT Cooler Buncher (2015) HiRA (2003) Isotope NERO (2003) Helium Jet (2016/17) Triplex Plunger (2012) Harvesting DDAS A1900 CAESAR (2009) (2014) CAESAR (2009) Fragment LENDA (2010) SuN (2012) Separator RFFS (2007) LH 2 Target, Ursinus (2010) (2001) Proton TPC (2016) GRETINA (DOE national user facility) (2013/14, 2015/16) Fast Beams Gas Stopper Thermalized beams Reaccelerated Beams DJMorrissey, LowEnergyUserMeeting 2015 4

Present Thermalized Beam Area for ReA and Precision Experiments BEam COoler LAser system Decay Station (movable) LEBIT Penning Trap system SIPT (under construction) ANL gas catcher (future CycStopper) New Cooler/Buncher  DC beam to Batch injection Thermal Stable Ion Source EBIT / ReA Accelerator (upstairs) (future advanced gas cell) DJMorrissey, LowEnergyUserMeeting 2015 5

Re-Accelerator Facility: State-Of-The-Art RIB Post-Accelerator fully commissioned and operational in 2015 ReA3 Accelerator and Experimental Hall RFQ CryoModule1 CM2 SECAR CM3 (2015) (DOE, Under Design) OPEN Low energy beam line JENSA AREA N4 thermalized RIB’s from CCF/A1900 2010/10: RFQ commissioning started AT-TPC 2011/04: CM1 first beam acceleration 2011/06: CM2 first beam acceleration 2012/04: first 1 +  n + acceleration 2013/06: First experimental hall beam line 2013/08: First rare isotope experiment A. Villari, ReA3 Dept. Head 2014/01: EBIT coil fails  2014/12: ReA3 Beam Lines complete 2014/04: EBIT magnet returns  2015/05: CM3 full energy acceleration 2015/09 ReA RIB program starts DJMorrissey, LowEnergyUserMeeting 2015 6

ReA3 Accelerator with original cryostat designs Pilot source for linac tuning with 1 H + , 4 He 2+ Achromatic Mass Separator “top - down” cryomodules n + RIB beams 1 + RIB beam • First RIB delivered in Aug/13 ( 37 K 17+ ) then EBIT failed with ~18 mo. downtime • Prebuncher before the RFQ for some pulse control (manipulate intensity in buckets) • Current new priorities: get 2 nd EBIT (magnet first), then commercial small EBIT • • reBuncher after linac to control energy spread and bunch length • The ReAccelerator developments and commissioning are supported by the Accelerator Physics faculty and with matrixed high-level support from FRIB DJMorrissey, LowEnergyUserMeeting 2015 7

ReA6 Phase-1 Tested • The prototype contains two β = 0.085 cavities and one superconducting focusing solenoid, built to validate both the unique bottom-up assembly of the cold mass and the FRIB cryogenic cooling system. • A FRIB-style cryoline was also constructed and connected to the cryomodule. • The device was installed in a concrete shielded area in the position that would be used later for operation with beam but NOT connected to the ReA3 beamline. • The tests were completed in May/2015 and were very successful. • This not only validates the FRIB cryomodule design but is the first step in a cost-effective path towards ReA12 ... DJMorrissey, LowEnergyUserMeeting 2015 8

ReA12 Upgrade and Experimental Area(s) • Cryomodule #5 and #6 (ReA9 and ReA12) will be copies of CM-4, the ReA6 cryomodule • Implementation can be done in stages • Preliminary ion-optical model established • Project has been scoped with preliminary cost estimates 76 Ga 85 Ge 58 Cr 65 Ge 30 S 25 Reaccelerator Specifications 20 ReA 12 ReA12 Hall MeV/nucleon ReA 9 15 ReA 6 10 Three identical devices ReA 3 5 ReA6 ReA9 ReA12 0 East High Bay 0.2 0.25 0.3 0.35 0.4 0.45 0.5 0.55 Q/A DJMorrissey, LowEnergyUserMeeting 2015 9

High Energy LINAC Section ReA12 Expansion can be done without interrupting the ReA3 Research Program EBIT ReA3 Low Energy Hall RFQ CM1 Commissioned 2013/2014 CM2 CM3 SECAR JANUS, ANASEN, SuN , CFFD…. AT-TPC A1900 T-PFs ReA12 High Energy Hall example equipment for scale ReA3 JENSA ISLA GRETINA Solenoid Your favorite Need infrastructure for the full arsenal of right here tools for low energy nuclear science: Coulomb excitation, direct reactions and scattering, fusion -evaporation, -fission, deep inelastic reactions, etc. etc. etc. … Note: ReA12 Beam lines & Room for Expansion Equipment TBD by Users (e.g., higher energies) Science Case for ReA12 is what we are here for … DJMorrissey, LowEnergyUserMeeting 2015 10

Summary • First radioactive ion beam experiment was completed at ReA3 Fall/2013 – The beam distribution in the low energy ReA3 hall was completed in Fall/2014 – Failure of EBIT magnet Jan/2014 delayed program by ~18 months • The ReA3 accelerator chain was completed in Spring/2015 and the experimental program is beginning • ReA6 prototype (2/8 cavities) successfully tested in Spring/2015 • Design for ReA12 accelerator is established • Area for experimental equipment defined (expansion is possible in Hi Bay) • Will need a compelling science program to support a proposal and to define the appropriate suite of equipment 11

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GasCell / D-line System Viewer/Degrader/ Faraday Cup Wedge/PIN Si Detector Faraday Cup Si Detector Gas Cell and Extraction System Mass Analyzing PF beam Faraday Cup Second analysis beam line which Magnet Si Detector will be used in the future Wide Range of Chemical Elements were thermalized and delivered: “Metals” [Ca(H 2 O) n ] 2+ , Ca 2+ [Fe(CO) n ] m+ , [Co(CO) n ] m+ (first) “Main Group” C + N + O + Na + Al + , AlO + Si + ,[SiOH(H 2 O) n ] + P + , [PN n ] + S + , SO + , SCH 3 + Cl + Ar + K + Ga + GeH + AsHe + , As + Se + H 2 Br + DJMorrissey, LowEnergyUserMeeting 2015 13

Capability Enhancements for the ReAccelerator: EBIT And LINAC Time Structure To Address User Needs LINAC Time scale, 80.5 MHz With low frequency prebuncher, 16 MHz 1.5-2 ns beam bunch every 12.5 ns 1.5-2 ns beam bunch every 62.5 ns ToF can be too short for experiments M. Syphers & D. Alt 12.5 nsec 62.5 nsec Natural ion pulse from the EBIT Better: pulse trap to release the gives high instantaneous rate ions over tens of ms A.Lapierre 45µsec Good: open trap slowly to release the ions over few ms 14

Operational Highlight – Reaccelerated Beams First Low Energy Rare Isotope Experiment In The Rea3 Hall 37 K produced by CCF and separated by A1900 Purity of 37 K Purity for 37 K ~ 50% ~ 100% Linear Gas Cell to ReA Analyzing Magnet 37 K 17+ Energy Loss [A.U.] Reaccelerated 37 K 37 Cl 13 C 37 K + from N4 Energy [A.U.] 15