MINOS: Starting Grant 2010 PE2: fundamental constituents of matter

Transcription

1 MINOS: Starting Grant 2010 PE2: fundamental constituents of matter Alexandre Obertelli, CEA Saclay DSM/IRFU/SPhN Institut d accueil: CEA/DSM 1

2 MINOS: nuclear MagIc Numbers Off Stability Alexandre Obertelli, CEA Saclay, DSM (France) Interview, ERC Starting Grant

3 Experimental nuclear physicist 32 years old, «starter» candidate Curriculum vitae Chronology : PhD thesis at CEA Saclay 2006: postdoctoral position, NSCL (USA) since end of 2006: staff position at CEA Saclay Nuclear shell structure Science Spokesperson of 6 accepted experiments within international collaborations Development of new-generation detectors 32 publications in peer-reviewed journals, including 10 letters (230 citations) 50 oral presentations, including 13 invited talks Supervision 2 PhD students (started in 2008 and 2009) Master students on regular basis, laboratory lectures 3

4 Update on scientific activities (2010) Independant research, international collaborations Nuclear shell structure Shapes of neutron-deficient nuclei Spokesperson of two new experiments accepted in March-April 2010 Invited lecture, Erice, August 2010 Co-organizer, Joliot-Curie international school, September 2010 Shell structure of exotic nuclei Spokesperson of an experimental program at Ganil and NSCL Initiator of new theoretical developments Invited talk, ECT* conference center, April 2010 Co-organizer, international workshop on magic numbers, CEA Saclay, May 2010 Elected for two Egide grants in collaboration with Hungary and Poland, January 2010 Detector developments First experimental campaign with the AGATA demonstrator, Legnaro, June-July 2010 Coordinator of the AGATA-detector laboratory at CEA Saclay, Co-initiator of CHyMENE, a thin solid hydrogen target for SPIRAL2, Initiator and in charge of the development of a LH2 target for GSI,

5 My project Forefront research on exotic nuclei Quest for new magic numbers Investigation of the astrophysical r-process path Develop an original detection-target system Fully exploit next-generation radioactive-beam facilities Impulse new approaches in reaction mechanisms 5

6 energy MINOS: From the in-medium nuclear force Magic numbers: a fingerprint of the NN interaction 2p 1f 0h i 13/2 2p 1/2 2p 3/2 1f 5/2 1f 7/2 0h 9/2 New shell structure still to be discovered 2s 1d 0h 11/2 2s 1/2 1d 3/2 1d 5/2 0g 7/2 0g 50 0g 9/2 1p 0f 1s 0d 0p 0s p 1/2 0f 5/2 1p 3/2 0f 7/2 0d 3/2 1s 1/2 0d 5/2 0p 1/2 0p 3/2 0s 1/ stable nuclei 126 known nuclei unknown nuclei (prediction) 6

7 to the origin of elements r-process: synthesis of heavy stable nuclei Cassiopea A supernova 7

8 protons Unique physics opportunities within the next decade at the fragmentation facilities RIKEN (Japan) and GSI (Europe) Discover new magic numbers far from stability r-process path Production rates 110 Zr 78 Ni 54,60 Ca 40 Mg neutrons 8

9 In-beam g spectroscopy and knockout In-beam g spectroscopy and knockout best to reveal new shell effects b spread Clear signature for (non-)magic nuclei magic b target not magic 28 In-flight: velocity b needed for Doppler correction b not measured in standard techniques Target thickness: trade off between statistics and resolution a bottleneck for experimental sensitivity 9

10 New method for high-resolution spectroscopy at < 1 Hz Charged-particle tracker coupled to a thick H 2 target: determine the emitter velocity at the vertex inside the target 10

11 MINOS+AGATA g spectrometer: gain >100 vs today s capabilities 1 pps, 1 week of beam time High gain in sensitivity Larger statistics, better energy resolution & cleaner spectra 11

12 Innovation New experimental technique Access to the velocity of emitter experimental break-through A technological challenge Combination of state-of-the-art components / interdisciplinary developments Micromegas detectors: low detection threshold, fast (<100ns), transparent, low cost and robust, cylindrical geometry Compact coupling to a large liquid H 2 target with thin envelop Electronics: digital, integrated ASICs, several khz triggers Unique expertise at CEA/DSM/IRFU Bulk Micromegas, CEA 12

13 Agenda and funding Project duration: 60 months Simulations R&D, conception In-beam tests Experiments Theory RIKEN & GSI Core research team (~5 people) Principal Investigator (A. Obertelli) Postdoc, experiment (5 years, ERC) Postdoc, theory (3 years, ERC) PhDs (3 years, ERC + other(s)) Engineers (technicians) (8(2) FTE, DSM) 9% ERC budget breakdown 47% 8% 36% Personnel Investment Meetings / workshops Experiments Investment Target, tracker, electronics, slow control, mechanics Requested funding to ERC: Total eligible costs (ERC+DSM):

14 Four reasons to support MINOS 1- Exciting physics program the quest for new nuclear magic numbers off stability 2- Unique original experimental approach and theoretical developments 3- Decisive period new-generation radioactive-beam facilities now/soon operational 4- State-of-the-art technological expertise at CEA/DSM 14

15 Présentation orale: ligne de conduite tenue [un point de vue] 1- CV [figure imposée] (2 transparents) - Cadrer le domaine scientifique - Mettre en valeur les responsabilités, les grandes lignes - Eviter les détails 2- Introduction-conclusion: dire l essentiel dès le début (1 transparent) - Contexte et défis scientifiques - Projet 3- Contexte scientifique et questions «clefs» (2 transparents) 4- Verrous technologiques à résoudre / opportunité scientifique (2 transparents) [très spécifique] 5- Le projet (4 transparents) - Expliquer sans détailler - Mettre en valeur les gains attendus: résultats de physique, sensibilité - Souligner les innovations en réponse aux verrous/opportunités 6- Agenda financement (1 transparent) 7- conclusions: arguments clefs en faveur du projet (1 transparent) 15

16 Questions / entretien 1-17 personnes dans le comité (2 absents) 2- Rythme rapide (15-20 questions en 15 minutes) 3- Tous types de questions mais principalement sur le contexte scientifique Ligne de conduite: - Répondre de manière concise - Reprendre si nécessaire la question en montrant une maitrise du contexte - Ne pas critiquer les travaux d autrui [conseil d un lauréat 2009] Opinion sur l interview: - L avis des rapporteurs est essentiel - Préparation: répéter devant des collègues / un auditoire (chefs d institut/laboratoire) - Lister une série de questions «évidentes» et savoir y répondre 16