1. Progress at other U.S. RNB facilities
(Joint RIBF/FRIB Users Meeting, APS/JPS Meeting, Hawaii 2009)
W. Nazarewicz
HRIBF
CARIBU at ATLAS
Cyclotron Facility at TAMU
RESOLUT at FSU
TWINSOL at Notre Dame

2. Holifield Radioactive Ion Beam Facility - Floor plan
Daresbury Recoil Separator (DRS)
Time-of-Flight Spectrometer
Scattering chamber
25 MV Tandem Electrostatic Accelerator
Recoil Mass Spectrometer (RMS)
On-Line Test Facility (OLTF)
Oak Ridge Isochronous Cyclotron (ORIC)
Enge Magnetic Spectrograph
Injector for Radioactive Ion Species 1 (IRIS1)
Injector for Stable Ion Species (ISIS)
Second-stage Isobar Separator
Low-energy Radioactive Ion Beam Spectroscopy Station (LeRIBSS)
Example cyclotron at ARRONAX Facility, Nantes, France
Proposed cyclotron room
High Power Target Lab (HPTL) & Injector
for Radioactive Ion Species 2 (IRIS2)
Ti:Sapphire lasers at HRIBF
IRIS2 undergoing commissioning now; HPTL operational since 2006
Enables use of laser photodetachment for beam purification. Suppress contamination by 99.9% with minimal loss of desired isotope [e.g. F(O),Cl(S),Ni(Co)]
Enables use of resonance laser ion sources [Al,Mn,Fe,Co,Ni,Cu,Ga,Ge,Sn,Tb,Dy,Ho …]
Rasterization of ORIC beam over up to 5cm diameter targets allows higher beam current
ORIC beam at oblique incidence allows liquid and foil targets at higher beam current
Second RIB production platform provides redundancy

3. HRIBF – recent science highlights
Studied mirror levels with 26Al(d,p)27Al
First measurement of the
26Al(p,p)26Al excitation function
Proton spectrum: 185 ug/cm2 Target, 107 MeV 10Be beam
LeRIBBS: The section of beta-gated gamma spectrum measured for 81Zn decay
10Be(d,p)11Be
Productive despite the interruption in RIB delivery
Commissioning Experiments at the Low-Energy Radioactive Ion Beam Spectroscopy Station (LeRIBSS)
The section of beta-gated gamma spectrum measured for 81Zn decay. The 216-keV and 711-keV gamma transitions can only result from the decay of 81Ga produced as a daughter activity of 81Zn. The 81Ga ions, initially produced at a rate about five orders of magnitude higher than that of 81Zn, were practically removed from the separated positive-ion beam.

4. Beams and science with the cyclotron replacement
Evolution of structure: Coulex, moment measurements, transfer at 132Sn & beyond
Collective properties in extended neutron radii:
Coulomb excitation near 96Kr
Evolution of structure near 78Ni: Transfer reactions, Coulex, moment measurements
Reaction mechanisms for the formation of superheavy nuclei
Decay properties of nuclei at the limits:
Crucial for understanding the formation of elements from iron to uranium
Baseline Yields for a C70-based HRIBF Ge Sn
• Basic Production method is direct 70 MeV proton induced fission on uranium carbide targets
• Target geometries are disks 3 cm diameter by 1.1 cm thick or 5 cm x 1.1 cm (6g/cm3 UCx density)
• Fission induced by secondary neutrons is included, and plays an important role.
• Maximum beam currents are based conservatively on deposited power densities used in similar targets at HRIBF. The limit is taken to be 88 W/g.
• Beam assumed to be “painted” almost uniformly across the UCx target face.
• Corresponding maximum beam currents are 82 and 185 μA respectively for 3 cm and 5 cm.
• A conservative limit of 80% of these limits is used in beam intensity calculations.
• In future we expect to develop effective secondary neutron production targets that can withstand 750 μA proton beams for “cold fission” production of n-rich beams by U(n,f).
I just noticed that I unintentionally left the baseline yield for the photofission driver (edu) on the plot as a thin green line.
beam current 185 μA
beam current 185 μA

5. HRIBF, Upgrade for the FRIB Era
An HRIBF Users Meeting
November 13-14, 2009
The HRIBF users group is proud to organize a workshop on the proposed high-current cyclotron upgrade to the HRIBF. The purpose of the workshop is to build the science case for the proposed new production driver based on a 70-MeV fixed-energy light-ion cyclotron. In addition, the HRIBF strategic plan will be updated based our discussions at the workshop.
The workshop will begin at 8:30 am on Friday morning and continue through to approximately 9:30 pm. We will reconvene on Saturday at 9:00 am and expect the meeting to conclude around 1 pm.

6. CARIBU: Californium Rare Isotope Breeder Upgrade @ ATLAS
CARIBU upgrade
Fall 2009: 2 mCi source  tests & yields studies
left part: floor plan of CARIBU and a picture of the on-going  assembly;        
right part: intensities of sample nuclei in the low-energy  stopped beam) and re-accelerated beam areas as a function of the source strength. Note that we plan to build up to  the 1 Curie source in three steps.
Winter 2009 – Spring 2010: 80 mCi source  1st expts.
Summer 2010: 1 Ci source  Full research program

7. Proposed ATLAS efficiency and intensity upgrade
Increase intensity of stable beams from ATLAS by factor >10
Increase intensity of CARIBU reaccelerated beams by > 5-10
Increase intensity of in-flight radioactive beams by >100
2 Booster +
2 ATLAS
cryomodules
Ion trap experiments
2 new bG=0.062 cryomodules,
12 cavities
EBIS
CARIBU
the plan for the efficiency and energy upgrade of ATLAS.  The various elements of this effort are indicated.
Recoil separator
Energy Upgrade Cryomodule
MHB RFQ MEBT (Chopper and Buncher)
2 PII cryomodules

8. First results from HELIOS
U. Western Michigan, Manchester, ANL collaboration z
Improved resolution for 11,12B(d,p)12,13B
“Conventional”
HELIOS Preliminary
HELIOS Preliminary
~300 keV
~100 keV
qCM=6o-29o
qCM=16o-29o
11B(d,p)12B
Latest experimental development: HELIOS is running. The data are from an experiment with a stable 11B beam and a radioactive 12B beam. The left and middle spectra compare results taken the conventional way (Si array) and with HELIOS and show the improvement in resolution. That is illustrated further on the right where two states separated by 200 keV in 13B are clearly visible. Alan Wuosmaa will discuss this further in his Hawaian talk.
12B(d,p)13B
3.48 MeV
3.68 MeV

9. Examples of reaccelerated beams produced in DIC:
Projected Beam Intensities from LIG after K500
(p,n)
Max. Energy
Intensity
Product
MeV/A
particles/s
27Si 57
6 x 103
50Mn 45
2 x 104
54Co
64Ga
4 x 104
92Tc 35
106In 28
108In
3 x 104
110In 26
6 x 104
We are within a year of our first accelerated RNBs from our K500 cyclotron at medium energies (up to about 50 MeV/A for lighter ions).  I have attached a layout of the facility following the upgrade and examples of beams.  First beams will come from accelerating H^- from the K150 cyclotron onto our light ion-guide target.  This is probably more than you want.  Also we have continued our program of producing in-flight beams with MARS over the last years.  Most recent work involves 23Al, 27P, and 31Cl beams.  We are implanting the beams into silicon detectors and measuring beta-delayed proton decay for states around the proton threshold.  This information is needed to get resonances for (p,gamma) reaction rates.
The acronym that has been adopted for our new facitlity is T-REX (TAMU Reaccelerated Exotics)
t1/2>100ms
Assuming 14 mA beam, realistic LIG, CBECR, transport and K500 extraction efficiencies

10. RESOLUT: a new radioactive beam facility at FSU
RF-Resonator
Magnetic Spectrograph
Target Position
Solenoid 2
Solenoid 1
Mass selection slits
Production
target
Experiment
Proton-decay Q-value spectrum
In-flight production, separation of radioactive beams
Superconducting RF-beam cooling
Driver accelerator: Tandem + SC Linac
Primary beams: Mass MeV/u
RIB produced: 6He, 7Be, 17N, 18Ne, 25Al, 30P , pps
RIB possible: Almost all T=1/2, T=1 with 6<=A<=30
Counts/50 keV
This resonance dominates astrophysical production of 26Alm
25Al - 24Mg (tof)
P.N. Peplowski et al.: PRC 79, R (2009): The lowest (l=0) 26Si -Resonance

11. TWINSOL – Notre Dame RNB Facility
an interesting recent result concerning total reaction cross sections for "weakly bound" and "halo" nuclei.  The data for 8B+58Ni, 7Be+58Ni, 6Li+58Ni, 6He+209Bi, and 8Li+208Pbwere taken here at ND.  The other data sets are from the literature.  Observed was that the "reduced" cross section (total reaction cross section divided by the square of the system radius), when plotted against the reduced energy (cm energy divided by the Coulomb barrier) shows some striking regularities.  "Weakly-bound" systems such at the 6,7,8Li and 7,9Be isotopes follow a trajectory that is well separated from that of the "normal" system 16O+64Zn, presumably due to the effects of the weak binding. However, the halo systems (8B, 6He) follow yet another trajectory that shows even larger enhancement.