The Neutrons For Science facility

Transcription

1 The Neutrons For Science facility X. Ledoux and the NFS collaboration OUTLINE Presentation Status of construction First experiments and commissioning

2 The NFS project Part of the SPIRAL-2 project built on the GANIL site, Caen, France NFS is one of the two facilities of the LINAG Experimental Area Neutron beam between 100 kev and 40 MeV Irradiation station for n, p, d and ions induced reactions Scientific collaboration: 50 physicists, 15 laboratories CEA/DAM/DIF, F-91297, Arpajon, France CEA/DSM/IRFU/SPhN, Saclay, France CENBG, Gradignan, France LPC, Caen, France IPHC, Strasbourg, France NPI, Řež, Czech Republic Uppsala University, Uppsala, Sweden KIT, Karlsruhe, Germany GANIL, Caen, France NIPNE, Bucharest, Romania JRC/IRMM, Geel, Belgium CEA/DEN, Cadarache, France IPNO, Orsay, France CIMAP, Caen, France Culham Centre for Fusion Energy, United Kingdom

3 NFS facility Converter cave Fundamental physics Fission reactors of new generation Fusion technology Studies related to hybrid reactors (ADS) Nuclear medicine Neutron source for fission fragment production Development and characterization of new detectors Radioisotopes production for medical applications Biology Study of the single-event upsets

4 Energy Resoluti Neutron time-of-flight facility Continuous and quasi-mono-energetic beam Flight path from 5 to 30 m High flux of fast neutrons Quasi-monokinetic beam : E n = up to 31 MeV Thin converter (1-3 mm) E n : from 0,1 MeV to 40 MeV Good energy resolution Reduced g flash Low instantaneous flux C. J. Batty et al.,nim 68 (1969) p % 6% 5m 1,5 ns 20 m 1,5 ns 20 m 8 ns 4% 2% 0% Energy (MeV) Complementary to the existing facilities

5 Irradiation facility Neutron irradiation High flux (Φ > n.s -1.cm 2 ) High energy (<E> = 14MeV) Irradiation in air Ion irradiation (all the beams delivered by the LINAC) Deuteron (2-40 MeV) Proton from (2-33 MeV) Ions Sample transfer system Cross-section measurement by activation technique Radioisotopes creation Irradiation of chips or material

6 Presentation Status of construction First experiments and commissioning

7 NFS beam line NFS beam line High Energy Beam line - Fluid distribution network: installed - Beam line: installed - Cables will be installed in January 2017

8 Collimator Goal : define the neutron beam shape Status on October 2015

9 The thin converter A thin lithium converter is needed for quasi-mono-energetic neutrons production The low melting point of Lithium makes cooling by radiation inefficient -> water cooling Requests : Power deposition as high as possible Usable without dismounting the rotating converter Safety constrains Two converters Delivered in February 2016 Installed in September 2016

10 The rotating converter Production of neutrons with continuous energy spectrum Last part delivered in June 2016 The Failure modes and effects analysis was performed: the conception is safe Under tests at CEA/IRFU/Saclay until June 2017 Transfer to NFS in second semester of 2017 Translation system delivered

11 Irradiation station and sample transfer system For irradiation of samples by ions Connected to pneumatic transfer system for activity measurement Experiment at Rez with beam (10-11 nov 2016) Installation at NFS in beginning of 2017

12 The second collimator and the neutron beam line For experiment at long distance, a 2 ND collimator is needed for: - resizing the neutron beam - shielding detectors from background Beam line under construction at IPHC Strasbourg (Delivery in June 2017) Vacuum system delivered Collimator design and construction realized by IPHC Strasbourg

13 Neutron monitoring Detector based on liquid scintillator EJ309 Neutron spectrum and flux measurement by the TOF technique n-γ discrimination by pulse shape analysis Characterization o at Ganil reaction 10,5 MeV/A Kr + Cu Light response between 5 and 30 MeV o at CEA/DIF Mono-energetic neutrons at 4, 5, 6 and 15 MeV Efficiency measurement Proton recoil telescope CH2 radiator + ΔE-ΔE-E Si telescope Prototype tested at GANIL

14 The single bunch selector Reduce the LINAC beam frequency below 1MHz select 1 bunch over N, N>100 The single bunch selector is composed of : A magnet deflects the Low Energy Beam Scraper : under construction at the Ganil Workshop Vacuum chamber and electrodes : installed at INFN-LNS, the new meanders have been successfully tested SBS control electronic : under work at INFN-LNS The power supply needs to be repaired Deviating magnet Scraper

15 Agenda Irradiation box Installation Cabling Functional test Pneumatic transfer system Installation Functional test Line equipments (diagnostics, pomp ) Installation Cabling Vacuum (gauge, pomp, valve) Installation Cabling Electronics Cabinets Equipment Cabling Automation installation Beam Line Technical commissioning Cooling system Installation Functional test Neutron beam dump Delivering Installation Rotating converter Test at CEA/Saclay Installtion at NFS Test at NFS Beam line in the TOF hall Construction Installation Sep Oct Nov Dec Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Request for accepted experiments

16 Presentation Status of construction First experiments and commissioning

17 First experiments 10 experiences submitted to the PAC of 9 th and 10 th of June > 7 accepted For the first call : o no deuterons beam o no burst selector limitation on realizable experiments NUM Titre Spokesperson Reaction model E712 Measurement of (n,xn) reaction cross sections on U238 G. Bélier, CEA-DAM Fission Fusion Radionuclei for medical applications E721 E713 E718 LIONS - Light-Ion Production Studies with Medley at the NFS facility Prompt fission neutron spectra measurement in neutron induced fission reactions Fission fragment angular distribution and fission cross section measurements relative to elastic NP scattering at 30 MeV A.V. Prokofiev, Uppsala University B. Laurent, CEA-DAM D. Tarrio, Uppsala University Excitation functions of short-lived isotopes in proton induced E. Simeckova, NPI, Rez reactions on nat Fe E715 Neutron-induced activation reactions A. Klix, KIT E717 Alpha-induced reaction cross-section measurements on natural and enriched Zn Measurements of the excitation function for the production of possible candidates for targeted alpha therapy at SPIRAL2 Astrophysics E719 Precise direct measurements of the 28 Si(p,γ) 29 P and 29 Si(p,γ) 30 P reaction rates to understand the origin of presolar nova grains G. Grinyer, Ganil G. de France, Ganil B. Bastin, Ganil Instrumentation E720 Measurement of the absolute neutron detection efficiency of FAZIA telescopes E. Bonnet, Ganil

18 Commissioning strategy

19 Radioisotopes for medical applications Study of alternative route production of several radioisotopes used in medical applications SPIRAL-2 : o alpha, HI beams o tunable energy Production of 211 As (α emitter, T 1/2 = 7.2 h) 209 Bi(α,2n) 211 At Also produce 210 At (decays to 210 Po, t 1/2 = 138 d) Reduce 210 At production if E alpha <30 MeV Scenario: - Irradiation at NFS hours of alpha at 28 MeV -> 4 GBq of 211 At - Transport to ARRONAX for chemistry Collaboration between GANIL and ARRONAX Production of 64 Cu Search of alternative routes with d or n induced reaction 64 Zn(d,2p) 64 Cu, 64 Ni(d,2n) 64 Cu, 64 Zn(n,p) 64 Cu

20 European project Dec 2013-Nov 2017 Coordinator E. Gonzalez (CIEMAT, Spain) 37 beneficiaries Contribution at NFS : 190k Not possible before Nov 2017 NFS in CHANDA WP 4 : Transnational access Task 7.4: The Transparent Neutron Beam Monitors for NFS and n_tof EAR2 Task 7.5: Commissioning of the NFS facility (Task coordinator: GANIL) Task 7.6: Instrumentation for NFS commissioning The 18 th of October 2016 the CHANDA governing board decided to ask for one-year extension

21 Summary 10 experiments have been submitted to the GANIL PAC (7 accepted) o Covering different topics (reaction model, fission, fusion, astrophysics, instrumentation, medical applications) o Proton, alpha en n induced reactions o Activation measurement and with neutron beam The installation o The beam line is almost finished o The technical commissioning of the beam line is scheduled by Apr 2017 A commissioning plan has been proposed to alternate commissioning phases and accepted experiments

22 LoI and proposals for Day-One experiments at NFS Neutron induced reactions studies : LoI_13 : Study of pre-equilibrium process in (n,xn) reaction, X. Ledoux LoI_14 : Comparison between activation and prompt spectroscopy as means of (n,xn) cross section measurements, M. Kerveno LoI_20 : Direct measurement of (n,xn) reaction cross sections on 239 Pu, G. Bélier LoI_21 : Light-ion production studies with Medley, S. Pomp SCALP - Scintillating ionization Chamber for ALpha particle Production in neutron induced reaction, G. Lehaut Fission : LoI_15 : Fission fragment distributions and neutron multiplicities, D. Doré LoI_22 : Fission fragment angular distribution and fission cross section measurements relative to elastic np scattering with Medley, S. Pomp LoI_28 : Study of the fission process and fission cross-section measurements, G. Bélier Measurements of prompt fission neutron energy spectra for fast neutron induced fission on major and minor actinides, A. Sardet Measurement of prompt fission gamma-ray spectra in fast neutron induced-fission of actinides, J.M. Laborie Gamma-rays spectroscopy and lifetime measurements at NFS, A. Dijon Cross-section reaction measurements by activation technique : LoI_16 : Proton and deuteron induced activation reactions, P. Bem LoI_24 : Neutron-induced activations reactions, A. Klix Measurement of cross-sections of deuteron-induced reactions on Ni and Zn, J. Grinyer Biology : LoI_23 : Response of Mammalian cells to neutron exposure, C. Hellweg R&D for the production of radioisotopes for medical applications at NFS, G. De France Investigation of 211At and 64Cu medical radioisotope production at NFS, J. Grinyer Detector development : LoI_29 : Neutron spectrometer characterization for LMJ project, B. Rossé Characterization of neutron signal in Si-CsI telescope and measurement of the absolute neutron detection efficiency, E. Bonnet