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

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• Coupled Cyclotron Facility Operations Perspective WRT ReA beams
• ReA Accelerator Facility Overview
• ReA3 complete
• ReA6 prototype tested
• ReA12 concept and area

DJMorrissey, LowEnergyUserMeeting 2015

What do we need from CCF ?

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• 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
• f 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

Facility Layout & Major Equipment

4 Fast Beams

Gas Stopper Thermalized beams Reaccelerated Beams

Space for future expansion

• f the science program

ReAccelerator Facility (2013), CM3 (2015)

A1900 Fragment Separator (2001) K1200 Cyclotron K500 Cyclotron MoNA (2003) LISA (2010) Sweeper Magnet (2004) SECAR (2015 -) JENSA (2014) ANASEN, FSU/LSU/TAMU (2013) SuN (2012) SEETF (2003) SeGA HiRA (2003) Triplex Plunger (2012) CAESAR (2009) LENDA (2010) LH2 Target, Ursinus (2010) GRETINA (DOE national user facility) BCS NERO (2003) DDAS CAESAR (2009) SuN (2012) RFFS (2007) Momentum Compression (2010) ANL Gas Catcher (2012) BECOLA (2011) LEBIT (moved 2011) S800 (1996) AT-TPC (2014) Cycstopper

• ff line (2014/15)

20 meter ReA3 Lines (2014)

ECR Ion Sources EBIT Cooler Buncher (2015) Helium Jet (2016/17) ReA6 CM (2015) SIPT (2015) Positron Polarimeter (2015/16) (2013/14, 2015/16) Isotope Harvesting (2014) Cyclotron Stopper (2016) Cryogenic Gas Stopper (2017) CFFD (2015) JANUS (2014) Proton TPC (2016) Low-Energy Beam Line (2012) Helium Jet (2016/17)

DJMorrissey, LowEnergyUserMeeting 2015

Present Thermalized Beam Area for ReA and Precision Experiments

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ANL gas catcher (future CycStopper) Thermal Stable Ion Source (future advanced gas cell) BEam COoler LAser system LEBIT Penning Trap system SIPT (under construction) New Cooler/Buncher  DC beam to Batch injection EBIT / ReA Accelerator (upstairs) Decay Station (movable)

DJMorrissey, LowEnergyUserMeeting 2015

Re-Accelerator Facility: State-Of-The-Art RIB Post-Accelerator fully commissioned and operational in 2015

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RFQ CM2 CM3 (2015) CryoModule1

ReA3 Accelerator and Experimental Hall

SECAR (DOE, Under Design) AT-TPC

Low energy beam line N4 thermalized RIB’s from CCF/A1900

• A. Villari, ReA3 Dept. Head

JENSA

2010/10: RFQ commissioning started 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 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

OPEN AREA

DJMorrissey, LowEnergyUserMeeting 2015

ReA3 Accelerator

with original cryostat designs

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n+ RIB beams 1+ RIB beam

Achromatic Mass Separator Pilot source for linac tuning with 1H+, 4He2+

• First RIB delivered in Aug/13 (37K17+) then EBIT failed with ~18 mo. downtime
• Prebuncher before the RFQ for some pulse control (manipulate intensity in buckets)
• Current new priorities:
• get 2nd 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

“top-down” cryomodules

DJMorrissey, LowEnergyUserMeeting 2015

ReA6 Phase-1 Tested

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• 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

• 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

ReA12 Upgrade and Experimental Area(s)

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5 10 15 20 25 0.2 0.25 0.3 0.35 0.4 0.45 0.5 0.55

MeV/nucleon Q/A

85Ge 58Cr 30S 65Ge 76Ga

ReA 3 ReA 6 ReA 9 ReA 12 Reaccelerator Specifications

ReA12 Hall

East High Bay

Three identical devices ReA6 ReA9 ReA12

DJMorrissey, LowEnergyUserMeeting 2015

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High Energy LINAC Section ReA12

Expansion can be done without interrupting the ReA3 Research Program Science Case for ReA12 is what we are here for …

EBIT RFQ CM2 CM3 CM1

ReA3

SECAR AT-TPC

Note: ReA12 Beam lines & Equipment TBD by Users

A1900 T-PFs

JENSA

ReA3 Low Energy Hall Commissioned 2013/2014 ReA12 High Energy Hall example equipment for scale

JANUS, ANASEN, SuN, CFFD…. Solenoid ISLA GRETINA Room for Expansion (e.g., higher energies)

Need infrastructure for the full arsenal of tools for low energy nuclear science: Coulomb excitation, direct reactions and scattering, fusion -evaporation, -fission, deep inelastic reactions, etc. etc. etc. …

Your favorite right here

DJMorrissey, LowEnergyUserMeeting 2015

• 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

Summary

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GasCell / D-line System

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Wide Range of Chemical Elements were thermalized and delivered: “Metals” [Ca(H2O)n]2+, Ca2+ [Fe(CO)n]m+, [Co(CO)n]m+ (first) “Main Group” C+ N + O + Na+ Al+, AlO+ Si+,[SiOH(H2O)n]+ P+, [PNn]+ S+, SO+, SCH3

+

Cl + Ar + K+ Ga+ GeH+ AsHe+, As+ Se+ H2Br+

DJMorrissey, LowEnergyUserMeeting 2015

PF beam Viewer/Degrader/ Wedge/PIN Faraday Cup Si Detector Faraday Cup Si Detector Mass Analyzing Magnet Faraday Cup Si Detector Gas Cell and Extraction System Second analysis beam line which will be used in the future

Capability Enhancements for the ReAccelerator:

EBIT And LINAC Time Structure To Address User Needs

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Natural ion pulse from the EBIT gives high instantaneous rate

45µsec

LINAC Time scale, 80.5 MHz Good: open trap slowly to release the ions over few ms 1.5-2 ns beam bunch every 62.5 ns

• M. Syphers & D. Alt

With low frequency prebuncher, 16 MHz

62.5 nsec 12.5 nsec

1.5-2 ns beam bunch every 12.5 ns ToF can be too short for experiments Better: pulse trap to release the ions over tens of ms A.Lapierre

Operational Highlight – Reaccelerated Beams

First Low Energy Rare Isotope Experiment In The Rea3 Hall

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37Cl 13C

Reaccelerated 37K

Energy [A.U.] Energy Loss [A.U.]

37K produced by CCF and separated by A1900

Linear Gas Cell Analyzing Magnet Purity of 37K ~ 100% to ReA

Purity for 37K ~ 50%

37K+ 37K17+

from N4