The ALTO facility Fadi Ibrahim IPN Orsay Tandem building Institut - PowerPoint PPT Presentation

The ALTO facility Fadi Ibrahim – IPN Orsay

Tandem building Institut de Physique Nucléaire Campus of the Paris Sud University Orsay (France)

ALTO general layout g -spectroscopy Split-Pole Bacchus ISOL spectrometer production cave ISOL experimental cave e LINAC (~100 m 2 ) Radioactive beam lines Stable beam w/o spectrometer cluster, Stable beam with spectrometer molecular & droplets beams

The ALTO PAC Richard Casten Yale, USA, Chair Dimiter Balabanski ELI-NP, Romania Emmanuel Balanzat CIMAP/GANIL, France Marcella Grasso IPN Orsay, France Stéphane Grévy Bordeaux-Gradignan, France Adam Maj IFJ PAN Kraków, Poland Paddy Regan Univ. Surrey, UK Peter Reiter Univ. Koeln, Germany Berta Rubio CSIC-Univ. Valencia, Spain Jean-Charles Thomas GANIL, France Christina Trautmann GSI, Darmstadt, Germany Aurora Tumino Kore Univ. Enna & LNS-INFN Catania, Italy Call for proposals once a year ALTO is an Infrastructure supported by the European Community through the ENSAR2 contract in the framework of H2020-INFRAIA-1-2014-2015, for the period from March 1 st , 2016 to February 29 th , 2020.

Beam-time and users (2011 – 2015) 2011 2012 2013 2014 2015 Users ~120 ~240 200 135 246 Beam-time 1752 h 3600 h 2712 h 2232 h 3816 h 219 UT 450 UT 339 UT 279 UT 477 UT

2015 run • 2015 – record beam time , limited by the number of operators available • High percentage of stable and radioactive nuclear physics experiments • Split Pole – 2 campaigns • RIB – 2 campaigns • True parallel operation of stable and radioactive beams over several weeks • 34 days of RIB in two campaigns

STABLE-BEAM STUDIES AT ALTO

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MINORCA physics cases Campaign managers: I. Matea and G.G.

Lithium Inverse Cinematics ORsay NEutron source Sample γ H target n-induced fission of 238 U n n n TIPS – tagging of n 100nA 7 Li γ 10 7 n/s/cm 2 isomer partners 13-17 MeV LICORNE Exoticity EXILL SF J. Wilson, M. Lebois et al. Testing ground for NFS@SPIRAL2

ν -ball: A hybrid LaBr 3 -Ge array for fast timing spectroscopic studies • Construction of a hybrid Ge + LaBr 3 array @ ALTO • Goal: to obtain > 10% total gamma photopeak efficiency • 24 France/UK Clover detectors + 36 LaBr 3 from FATIMA • LOI (2015) signed by 43 scientists from 17 different institutions • Experimental campaign planned for 2017-2018 • Estimated cost (Transport, mechanics, DAQ) 140 k€

RADIOACTIVE ION BEAMS AT ALTO

The ISOL installation based on photo-fission: the first of its kind in the world e-LINAC 10 µA 50MeV (former 1 st section of the LEP injector) BEDO beta decay spectroscopy secondary beam lines TIS vault ~5.10^11 fissions/s POLAREX nuclear orientation on line PARRNe mass separator Target Ion-source ensemble kicker - bender identification station

ALTO – RIB production First operational RIB facility based on photo-fission Y. Oganessian et al. , NPA 701 (2002) 87c standard ISOLDE target ∅ = 14 mm; L = 200 mm ρ = 3.2 g/cm 3 ; T ≤ 2100 o C  Yields for 10 µA, 50 MeV e - beam (10 11 fissions/s)

Rialto: Resonant laser ionisation for beam selectivity S. Franchoo et al. The variety of the physics program at ALTO strongly depends on RIB availability, intensity and purity LASER ION SOURCE efficiency, Z-selectivity first successfully laser ionized beam Phys. Rev. C 88, 047301 (2013) IN-TIS CHEMISTRY Lanthanide Region Semi refractory (slow release from UCx) fluorination refractory Semi refractory

Progress in the instrumentation of the secondary beam lines BEDO : BEta Decay studies at Orsay (1 st physics exp. last year) BEDO setup BEDO setup in gamma mode in neutron mode neutron gamma 4 small EXOGAM Dubna neutron clovers detector TETRA 2 1 3 fast timing mode LaBr3 LaBr3 Ge BaF2 LaBr3 Distances / source : borated  Ge = 40 mm ~90 3 He tubes polyethylene  LaBr3 = 25 mm  BaF2 et LaBr3 = 40 mm shielding BGO shields Ge detectors  Plastique = 25 mm

Present RIB setups and near-future projects Parrne mass Identification separator station TETRA (existing) TAS POLAREX BEDO/TETRA MLLTRAP (existing) Mass LTNO measurements ( 3 He/ 4 He) RFQ LINO Cooling, bunching Laser-Induced nuclear orientation (µ,Q, J p )

Le projet pour la fiabilisation et pérennisation d’ALTO dans le cadre d’une stratégie nationale

5 WP principaux dans ALTO 2.0 - Physique : redéfinir de manière claire le programme scientifique des années à venir - Fiabilisation : surtout sur la partie radioactive, retour souhaité de la R&D - Environnement : interne, national et international. Mise en place d’une stratégie commune avec la GANIL/SPIRAL2 - Valorisation : Ouverture plus grande vers les industriels et l’enseignement - Etats généraux : prévus aux alentours de Novembre Délivrables : Etats généraux (novembre) Livre blanc (janvier)

5 WP principaux dans ALTO 2.0 - Physique : redéfinir de manière claire le programme scientifique des années à venir - Fiabilisation : surtout sur la partie radioactive, retour souhaité de la R&D - Environnement : interne, national et international. Mise en place d’une stratégie commune avec la GANIL/SPIRAL2 - Valorisation : Ouverture plus grande vers les industriels et l’enseignement - Etats généraux : prévus aux alentours de Novembre Délivrables : Etats généraux (novembre) Livre blanc (janvier)