Il progetto SPES: produzione di fasci di ioni radioattivi ai Laboratori Nazionali di Legnaro.
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1 Il progetto SPES: produzione di fasci di ioni radioattivi ai Laboratori Nazionali di Legnaro. Alberto Andrighetto LNL-INFN Congresso SIF Napoli
2 Talk Overview -Introduction - The SPES layout & devices. - The production target (TIS). - The TIS R&D activities. - Final remarks.
3 The INFN Legnaro Laboratory 1984 Electrostatic accelerators Superconducting radiofrequency accelerators 50th LNL birthday! SPES is the LNL future Nuclear Physics - Fundamental Interactions Interdisciplinary Physics - Detector Techniques - Accelerator Design & Technology - Superconductivity
4 The RIB European Scenario FAIR IF beams GANIL, Caen, France delivering IF beams since 1984 (SPIRAL) ISOL beams since 2001 GSI, Darmstadt, Germany delivering IF beams since 1990 SPIRAL II ISOL beams REX-ISOLDE, CERN delivering ISOL beams since 2001 HIE-ISOLDE ISOL beams SPES, Legnaro, Italy ISOL beams EXCYT, Catania, Italy ISOL beams
5 The Excyt LNS facility The INFN RIB ISOL Facility running since 2002 Cyclotron k800: RIB driver
6 The Excyt LNS RIB facility Target Front End 15 MV Tandem post-accelerator Target Chamber Unit
7 The SPES project Goal: to expand in the future the nuclear physics tests at LNL SPES is: 1) A second generation ISOL facility (for neutron-rich ion beams) 2) An interdisciplinary research center (for p,n applications) The SPES staging a g b d
8 Physics SPES Possibility to produce more than 500 isotopes Nuclear Physics with RIB - High angular momentum - Deformed nuclei - Correlation (pairing) - Shell evolution ORNL calculation Nuclear Astrophysics with RIB - Heavy elements origin (r,p,s process) - Stellar explosion - Neutron stars - X-ray burst and supernovae
9 Physics nuclear SPES SPES RIB
10 SPES project status: Building design & study of beam transport to ALPI are completed RFQ Charge Breeder Exp. Hall 3 Spes (new) building ALPI building Cyclotron HRMS Beam Cooler RIB target stations
11 The SPES main devices Driver: Commercial cyclotron Production Target: NEW CONCEPT (Multi-foil UCx target) Post Accelerator: Piave- Alpi existing complex RIB manipulation stage ALPI - Mass Separator (WF) - Beam Couler - HRMS - Charge Breeder - RFQ Target-Ion Source Complex: - optimized for 8kW beam power - E proton = 40 MeV for RIB - 10^13 fission/s. PIAVE
12 - The driver - The RIB manipulation - The post accelerator - The production target
13 Cyclotron load work per year - 2 weeks per shift - Beam preparation 2 days - Beam on target 12 days - Beam on target 280 hours per shift - Expected Beam on target: more than hours per year (RIB+appl.)
14 Status of Cyclotron 70p Magnet in Japan (Dec 2011) 70p Model. Transfer to Marmen (Canada) for final Machining (March 2012) Main Dimensions Diameter = 4.5 m Height= 1.7 m Weight = 210 tons
15 - The driver - The RIB manipulation - The post accelerator - The production target
16 Target Beam transport from TIS to HRMS Wien Filter Dipole Dipole RFQ Cooler Acc. Column Dipole Multipole Dipole Acc. Column
17 Beam transport from HRMS to ALPI HRMS CB CB NEW RFQ RFQ QWR1 QWR2 CR3-CR4
18 - The driver - The RIB manipulation - The post accelerator - The production target
19 ALPI Low-Beta Cavity Upgrade Motivation: to achieve at least 10 MeV/A up to A/q=7 most beam species (up to the heaviest) and higher beam transmission Starting situation: 20 QWRs in 5 cryostats E a ~ 3 MV/m -> total accelerating voltage ~ 11 MV After upgrade: 24 QWRs (6 cryostats) E a = 5 MV/m (upgraded rf system) -> total accelerating voltage ~ 21 MV Optimum beta βo = βo = 0.11 βo = 0.13 ALPI layout CR03 prototype work completed
20 SPES Final Performance 80 Ga Sn Kr In Ar Kr Xe Ne Sn Sn Xe Sn Au 30+
21 - The driver - The RIB manipulation - The post accelerator - The production target
22 The SPES TIS complex ion source 1+ transfer line proton beam SPES production target
23 Target complex disc & container Temperature distribution [ C] (ANSYS box ) proton beam window UC x disk dumper
24 Target & ion source I Target = 700A -> 1200A max I Line = 200A -> 600A max
25 The SPES off-line Front end (made in collaboration with INFN-MI, INFN-PV, INFN-BO) 60 kv platform
26 The TIS R&D activities
27 The TIS SPES Laboratories HT LNL Lab Test Bench LNL Lab UCx Chemistry PADOVA Lab Carbide Chemistry LNL Lab Laser PAVIA Lab New class A LNL Lab
28 Target production Study of the target porosimetry on the isotopes production yield 2010 Test Standard UC X 2011 Test Low density UC X 2012 Test Medium density UC X Density (g/cm³) Diameter (mm) Thickness (g/cm²) Calculated porosity (%)
29 HRIBF: On-Line TIS Testing Facility (low intensity (<50 na) tests of RIB production targets) Beam from Tandem Accelerator Target / Ion Source Beam Diagnostics Dipole Magnet M/DM = 2000 Moving Tape System and g-ray Detector
30 Yield (/sec/ A) Yield (/sec/ A) Experimental tests at HRIBF Irradiation by 40 MeV, 50 na proton beam, ionization with plasma ion source 2010 Test Standard UC X 2011 Test Low density UC X 2012 Test Medium density UC X shipped to ORNL for test (end of 2012?) Br yields 2000 C Br yields 1800 C Br yields 1600 C T 1/2 (s) Br Br T 1/2 (s) Br yields 2000 C Br yields 1800 C Br yields 1600 C Targets tested at 3 different T: 2000 C, 1800 C and 1600 C 20 elements, about 80 isotopes collected Yield vs. half-life characterization
31 B 4 C for the production of Be Free C B 4 C
32 RIB ionization methods: Selective method Surface Ion source Very selective method Laser beam Laser with SIS Unselective method Plasma Ion source H Not extracted Surface Ionization Method 1 2 Photo Ionization Method Li Be B C N O F Ne Plasma Ionization Method Na Mg Al Si P S Cl Ar K Ca Sc Ti V Cr Mn Fe Co Ni Cu Zn Ga Ge As Se Br Kr Rb Sr Y Zr Nb Mo Tc Ru Rh Pd Ag Cd In Sn Sb Te I Xe Cs Ba La Hf Ta W Re Os Ir Pt Au Hg Tl Pb Bi Po At Rn Fr Ra Ac Rf Db Sg Bh Hs Mt Main fission (p-> 238 U) fragments He
33 Target and Ion Sources support ionizing cavity plate connector thermal screen Hot cavity: - Optimized for Surface Ionization (Re inner surface) - Optimized for Laser Ionization (Ta, naked)
34 Target and Ion Sources > The Plasma Ion Source (PIS) adopted for the SPES facility Starting configuration Hybrid MK5 (CERN) EBPIS (ORNL)
35 Target and Ion Sources > Emittance measurements for SIS and PIS SIS (Cs beam) PIS (Ar beam)
36 Laser test at LNL with excimer Aluminum ionization with a single wavelength LPX200 XeCl excimer laser Al photo ionization Pulse. 15 ns λ=308 nm Laser beam Hot Cavity Laser beam (phosphorescence on plastic dump) The laser beam shape is focalized into hot cavity of 3 mm. diameter and 6 m. far away
37 1 Pump Laser: Quanta System G.Y.L 101/102 Nd:YAG laser Impulse Energy up to 300mJ Repetition rate max 10Hz PAVIA Laboratory setup Complete laser photoionization system structure Since April 2010: the 3 tuneable laser are ON 3 Tuneable Dye Laser : Lambda Physik FL3002E and Lambda Physik LPD3002E Bandwidth 0,2 cm -1 Repetition rate according to pump Goal: Build up a complete 3λ ionization scheme
38 The target chamber handling Two systems are foreseen in order to increase the handling security level Target chamber unit Vertical device Target Front End Horizontal device
39 Handling system test bench at LNL Vertical test bench Horizontal test bench
40 Wien Filter on the FE Laboratory (New set up with mass separator May 12) Front End FC + Beam Profiler WF FC + Slit EM
41 The on-line Front end at LNS LNS K800 Superconducting Cyclotron For RIB production test using LNS Cyclotron Proton; E= 40 MeV I = 50 na Proton from K800 Cyclotron
42 Conclusion
43 SPES collaborations
44 SPES possible Schedule
45 Current status and overview Letters of Intent: under discussion to select first-day-exp. ISOL Target and Ion Source: working in off-line laboratory. Layout for pre-acceleration: defined. Authorizations ready for cyclotron operation. Contract for cyclotron: signed November 10, final design accepted (June 11), cyclotron under machining. Building project: ready, financed (June 12), bid on the way. Phase β and γ partially financed (July 12) Expected ground breaking Feb
46 The SPES-TIS group Since 2004: 45 thesis performed in the frame of target SPES activities
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