1 / 6

NA2: Thin actinide targets optimized for high intensity beams

NA2: Thin actinide targets optimized for high intensity beams. Purpose: Optimize the high power capability and durability of thin actinide targets (“thin” means 0.1 to few mg/cm 2 , i.e. not ISOL targets) for neutron and charged-particle induced reactions. Benefits:

steve
Download Presentation

NA2: Thin actinide targets optimized for high intensity beams

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. NA2: Thin actinide targets optimized for high intensity beams Purpose: Optimize the high power capability and durability of thin actinide targets (“thin” means 0.1 to few mg/cm2, i.e. not ISOL targets) for neutron and charged-particle induced reactions. Benefits: Extended target lifetimes and increased primary/secondary beam intensities at existing European user facilities (LOHENGRIN@ILL, SHIP@GSI, TASCA@GSI, LISE@GANIL,...). Organisation: Coordinated production and test of fissile and non-fissile actinide targets under reproducible conditions. Comparison of different target preparation techniques, backings and covers. Training activities: • Workshop on thin actinide targets. • Permanent link between target producers and target users. • Hands-on experience for students and postdocs.

  2. NA2 Participant Institutions 1. Institut Laue Langevin & LPSC Grenoble, F target production by electrolysis, electrodeposition and painting on-line target tests under intense neutron flux to measure temperature, fission product intensity and energy distribution 2. IRMM Geel, B target production by spray-painting, electrodeposition (and evaporation) 3. LMU Munich, D target production by evaporation (and sputtering) 4. IPN Orsay, F target production by electrodeposition, spray painting target characterization by RBS, alpha, gamma spectroscopy future: CACAO project: joint CNRS-IN2P3/CEA hot lab 5. GANIL Caen, F heavy ion irradiation for validation of dpa-lifetime-relation Target production in collaboration with Nuclear Chemistry Institute Mainz, LBL Berkeley and Radium Institute St. Peterburg. Open to other collaborators.

  3. NA2: Actinide target production and characterization IRMM LMU LMU IPNO IRMM 235U target RBS cartography (1.5 mm step)

  4. Additional losses due to: • sputtering by fission products • evaporation (e.g. for UF4) • diffusion into backing or cover • loss of adhesion to backing NA2: On-line test of high power actinide targets l = F s Burnup of 235U target in 5.5E14 n/cm2/s neutron flux comparison to accelerator beams: 5.5.1014 n/cm2/s ≈ 88 pmA/cm2 • target thickness monitored on-line via width of fission product energy distribution • target temperature distribution monitored by pyrometer and IR camera • longterm studies (several weeks) possible simulate at LOHENGRIN long exposition to intense HI beams

  5. NA2: Synergies with other NA or JRA “survival training” for actinide targets at ILL: • veryhigh neutron flux: 5.5E14 n/cm2/s • nuclear heating up to ca. 1000 °C • extremely high radiation damage: ca. 50 dpa/day, equivalent to damage by 3 mA/cm2 340MeV 48Ca beam on 238U target, i.e. 100 times more intense than present accelerator beams We identified overlap/possible synergies with the following other LoIs: • ShERN (NA12) • ECOS (NA4 or JRA11) • ISOL-AT (JRA1) We are ready to merge our LoI and contribute with our capabilities to any of these. We leave the decision to the EURONS2-proposal management team to select the best option for fitting it into the overall EURONS2 proposal.

  6. The LOHENGRIN fission fragment separator mass-separated fission fragments, up to 105 per second, T1/2 ≥ microsec. flux 5.5·1014 n./cm2/s few mg fission target (0.1-1 mg/cm2, few cm2) several 1012 fissions/s

More Related