Stable and Rare Beams at the Texas A&M Cyclotron Ins:tute

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1 Stable and Rare Beams at the Texas A&M Cyclotron Ins:tute S. Yennello T-REX Interna'onal Symposium on Super Heavy Nuclei 2015

2 Facility Layout K500 Commissioned Commissioned 1967, Decommissioned 1985 K150 Recommissioned 2008 (Upgrade Project)

3 3 Modes of Stable Beam OperaPon 1) K500 K500 experimental areas

4 3 Modes of Stable Beam OperaPon 1) K500 K500 experimental areas 2) K150 K500 experimental areas

5 3 Modes of Stable Beam OperaPon 1) K500 K500 experimental areas 2) K150 K500 experimental areas 3) K500 + K150 K500 experimental areas (beams cannot cross!)

6 100.0 K500 CYCLOTRON + ECR 72 MeV/u deuterons (max 80 MeV/u) 12 MeV/u 238 U E/A (MeV/Nucleon) ATOMIC MASS NUMBER

7 40 MeV protons (max 55 MeV) 6.3 MeV/u 84 Kr

8 Nuclear Science Programs at TAMU Nuclear Astrophysics (Capture γ rates) Fundamental InteracPons (0 + è 0 + β- decay Correla:ons) Nuclear Dynamics and Thermodynamics (caloric curves, N/Z effects ) Heavy element chemistry (Produc:on of nuclei with Z>100...) Nuclear Incompressibility (Giant Monopole Resonance)

Present Research Program Program Project Leaders Nuclear Giant Resonances Youngblood Incompressibility Fundamental 0 + 0 + β decay Hardy, Melconian InteracPons

beams Natowitz, Yennello and Thermodynamics ProperPes of hot nuclei Nuclear Structure Resonances in light exopc nuclei Rogechev Heavy elements ProducPon of nuclei

9 Present Research Program Program Project Leaders Nuclear Giant Resonances Youngblood Incompressibility Fundamental β decay Hardy, Melconian InteracPons (Gagliardi, Tribble) Astrophysics Capture γ rates Rogechev, Tribble (Gagliardi) RHI STAR Mioduszewski, Gagliardi (Tribble) Nuclear Dynamics ReacPons with exopc beams Natowitz, Yennello and Thermodynamics ProperPes of hot nuclei Nuclear Structure Resonances in light exopc nuclei Rogechev Heavy elements ProducPon of nuclei with Z>100 Folden Theory ReacPon Dynamics Bonasera Nuclear Response Shlomo Few- body systems Nuclear astrophysics Zhanov RelaPvisPc Heavy Ion ReacPons Fries, Ko, Rapp

10 Applied Physics Programs at TAMU Single Event Eﬀects (Chip tes:ng) Medical Isotope ProducPon (At211, high E - α) Broad Beam IrradiaPon (Ultraﬁne ﬁlters)

11 Isotope produc:on and research ac:vi:es

12 MARS Recoil Separator Dispersive Image Final Achroma:c Image Q5 D3 Q4 Wien Filter D2 Q3 D1 Q2 Q1 Produc:on Target Rotatable Arm Reac:on Angle: 0-12 o (selectable) MARS Acceptances: Anglular: 9 msr Momentum: 4 %

13 Developing accelerated RIBs will benefit all of these programs! Upgrade Project T-REX T-REX TAMU Reaccelerated Exo:cs

14 Two Methods for making RIBs 1- Heavy Ion Guide Deep inelas:c scafering of intense heavy ion beams at MeV/u on neutron rich targets Big Sol used as front end (clean up) separator Degrader system and ANL (He) gas catcher, thermalize RIBs, charge 1+ state Ortho- TOF used for diagnos:cs and beam tuning LEBT transport RIBS to CBECR ion source First RIB: 38 S via 40 Ar è 64 Ni T-REX

15 Collisions between Heavy Ions at Fermi Energies (10 < E/A < 40MeV) Approaching phase: b Projectile (Z p,a p ) θ Target (Z t,a t ) Neutrons Protons b: impact parameter θ: scattering angle Grazing angle, θ gr : nuclei in touching configuration Overlap (interaction) phase: exchange of nucleons: Deep Inelastic Transfer (DIT) Model L. Tassan-Got and C. Stephan, Nucl. Phys. A 524, 121 (1991) excited projectile-like fragment (PLF) or quasi-projectile excited target-like fragment (TLF) or quasi-target T-REX

16 Nuclide cross sections from: 40 Ar (15 MeV/A) + 64 Ni, 58 Ni, 27 Al K (+1p) Cl (-1p) P Ar S (-2p) Si 40 Ar + 64 Ni 40 Ar + 58 Ni 40 Ar + 27 Al Largest cross secpons with the n- rich 64 Ni target 38 S first RIB of interest from HIG (-3p) (-4p) T-REX

17 Gas Catcher Being Installed at TAMU T-REX

Two Methods for making RIBs 2- Light Ion Guide Intense (10-20 μa) proton and deuteron beams at 30-50 MeV/u on various targets Beams created nega:ve ion source Primary beam stopped aluminum, water

18 Two Methods for making RIBs 2- Light Ion Guide Intense (10-20 μa) proton and deuteron beams at MeV/u on various targets Beams created nega:ve ion source Primary beam stopped aluminum, water cooled beam dump p,n reac:ons create RIBs Dense (He) gas cell thermalizes RIBs, charge 1+ state Differen:al pumping and SPIG moves RIBs to CBECR ion source First RIB: 27 Si : 27 Al(p,n) 27 Si T-REX

19 Light Ion Guide ~ 1mbar ~10-2 mbar proton beam ~10-6 mbar Gas Cell with Target He ~ 300 mbar To CBECR SPIG / RF- Hexapole T-REX

20 T-REX Status K150 Cyclotron operational & beam lines installed to K500 experimental areas and LIG CBECR ion source working with efficiencies as high as 20% with 1 + sources Accelerated 85 Rb 15+ at 10, 15 MeV/u and 133 Cs 24+ at 10 MeV/u in K500 from CBECR ion source through injection line (throughput ~15%) LIG fully installed and tested with open 228 Th 64 Ga & 67 Ga (from p+zn) extracted from LIG!!! HIG installed & preparing for source testing T-REX

21 100.0 K500 CYCLOTRON + ECR 72 MeV/u deuterons (max 80 MeV/u) + CBECR 12 MeV/u 238 U E/A (MeV/Nucleon) T-REX ATOMIC MASS NUMBER

22 Future Equipment MicroMegas TexAT Beam E Field Cage Si-CsI(Tl) telescopes

23 Summary Texas A&M Cyclotron Ins:tute is able to deliver a wide variety of stable and radioac:ve beams MARS currently produces inflight RIBs T- REX will deliver reaccelerated RIBs to all current (and future) experimental equipment stopped RIB to TAMU Trap

24 Facility & Research supported by US Department of Energy, Office of Science, Nuclear Physics Robert A. Welch Founda:on State of Texas Texas A&M University US Na:onal Science Founda:on US Department of Energy, NNSA

Stable & Radioac.ve Ion Beams at the Texas A&M University Cyclotron Ins7tute. S. Yennello LECM 2015

Stable & Radioac.ve Ion Beams at the Texas A&M University Cyclotron Ins7tute S. Yennello LECM 2015 Scien7fic priori7es What is the origin of the elements? ANC measurements of cri7cal (p,γ) and (α,γ) reac7ons