1 / 16

IDEA meeting – 19&20 November 2007 ENS Paris

Status of the Nd-150 enrichment project. Corinne Augier – Serge Jullian – Dominique Lalanne – Fabrice Piquemal. Presented by Serge JULLIAN LAL Orsay Université Paris-Sud 11, Faculté des Sciences d’Orsay et IN2P3/CNRS. IDEA meeting – 19&20 November 2007 ENS Paris.

karinaj
Download Presentation

IDEA meeting – 19&20 November 2007 ENS Paris

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. Status of the Nd-150 enrichment project Corinne Augier – Serge Jullian – Dominique Lalanne – Fabrice Piquemal Presented by Serge JULLIAN LAL Orsay Université Paris-Sud 11, Faculté des Sciences d’Orsay et IN2P3/CNRS IDEA meeting – 19&20 November 2007 ENS Paris

  2. Status of the Nd-150 enrichment project Plan Interest of 150Nd for bb studies MENPHIS in France: short description SNO+/SuperNEMO: new Nd-150 collaboration Conclusions Presented by Serge Jullian – NEMO/SuperNEMO – LAL Orsay, France IDEA meeting – 19&20 November 2007 – ENS Paris

  3. Interest of 150Nd for bb studies

  4. Factor of merit of 150Nd Activity = A A0 =  M0 2 x G0 (Z, Q) x < m>2 150Nd is the best for G0 phase space factor • Constraint on 222Rn and 214Bi : NO • Activity comparison: 100 kg of 150Nd equivalent to 1 700 kg of 76Ge • 0 to the excited state: phase space available at Q = 2.7 MeV • Nuclear matrix element? • M0 (SUSY): 150Nd the best

  5. MENPHIS in France: short description

  6. MENPHIS description SILVA/AVLIS? Achievements of the French SILVA uranium enrichment programA. PETIT, G. BORDIER, P. LEMAIRE et al., CEA Gaseous diffusion Ultracentrifugation

  7. Basics of the SILVA/AVLIS process (1/4) 235U + 3 photons  235U+ + e- • Selective photoionization Choosing an efficient photoionization scheme is a very difficult task  3 wavelengths l1, l2, l3

  8. Basics of the SILVA/AVLIS process (2/4) depleted U collecting plate enriched U collecting plate photoionizing laser beam vapour jet ( natural U)

  9. Basics of the SILVA/AVLIS process (3/4) light-vapor interaction volume enriched U collectors depleted U collector enriched U stream depleted U stream feed stream reflux electron beam gun water cooled crucible

  10. Basics of the SILVA/AVLIS process (4/4) Copper Vapor pump Lasers and YAG oscillators Dye lasers (oscillators - Amplifiers) Waste collector Beam folding system Beam transport Product collectors Beam shaping with closed loop (steering, centering, wavefront) Vapor plume (U nat)

  11. Milestones of the AVLIS process (USA) 1972: Beginning of the AVLIS Project at Los Alamos 1992: 150 kg (2%); 112 hours (9 hours full flow) 1992-95: Work on Gd and Er 1997: 400 hours (280 hours for enrichment) 1999: the AVLIS program is stopped in USA

  12. 2000–2003 Program: MENPHIS facility Evaporator Dye laser chain Yag laser Copper vapor laser Design : 2001 Building : 2002 1st test: early 2003 1st full scale exp.: June 2003

  13. MENPHIS enrichment experiment results • Main results for the process : • 204 kg of enriched uranium at 2.5 % mean (predicted) value • About 2000 kg natural U evaporated •  400 “on line” assay measurements

  14. SNO+/SuperNEMO: new Nd-150 collaboration

  15. Conclusions of the SNO+/SuperNEMO meeting • Joint SNO+/SN meeting, Idaho State University, Idaho (US)  6-8 November 2007 • Status of the projects: SNO+: phase 1 with natural neodymium (natNd) SuperNEMO: phase 1 with enriched selenium (82Se) • Joint effort:  150Nd production with MENPHIS chemical purification of 150Nd (radiopurity) • Common interest for liquid scintillator use (LAB) and chemical purification • New collaboration called Nd-150

  16. Conclusions • Nd-150 collaboration is opened to other members • A step which could help to a new operation of the MENPHIS facility THANK YOU

More Related