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

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Dec 30, 2023 41 likes •296 views

The ALTO facility Fadi Ibrahim IPN Orsay Tandem building Institut de Physique Nuclaire Campus of the Paris Sud University Orsay (France) ALTO general layout g -spectroscopy Split-Pole Bacchus ISOL spectrometer production cave ISOL

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The ALTO facility

Fadi Ibrahim– IPN Orsay

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

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Stable beam with spectrometer Stable beam w/o spectrometer Radioactive beam lines

e LINAC

Split-Pole spectrometer Bacchus ISOL experimental cave (~100 m2) cluster, molecular & droplets beams ISOL production cave g-spectroscopy

ALTO general layout

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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 The ALTO PAC

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 1st, 2016 to February 29th, 2020.

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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

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2015 run

2015 – record beam time,

limited by the number of

perators 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
ver several weeks
34 days of RIB in two campaigns

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STABLE-BEAM STUDIES AT ALTO

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MINORCA physics cases

Campaign managers: I. Matea and G.G.

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Lithium Inverse Cinematics ORsay NEutron source

n n n n

H target 100nA 7Li 13-17 MeV

γ γ

Sample 107 n/s/cm2

TIPS – tagging of isomer partners n-induced fission of 238U Exoticity

LICORNE EXILL

Testing ground for NFS@SPIRAL2

J. Wilson, M. Lebois et al.

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ν-ball: A hybrid LaBr3-Ge array for fast timing spectroscopic studies

Construction of a hybrid Ge + LaBr3 array @ ALTO
Goal: to obtain > 10% total gamma photopeak efficiency
24 France/UK Clover detectors + 36 LaBr3 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€

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RADIOACTIVE ION BEAMS AT ALTO

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The ISOL installation based on photo-fission: the first of its kind in the world

PARRNe mass separator e-LINAC 10 µA 50MeV (former 1st section of the LEP injector) TIS vault ~5.10^11 fissions/s Target Ion-source ensemble kicker - bender secondary beam lines POLAREX nuclear

rientation on line

identification station BEDO beta decay spectroscopy

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ALTO – RIB production

First operational RIB facility based on photo-fission

standard ISOLDE target ∅ = 14 mm; L = 200 mm ρ = 3.2 g/cm3; T ≤ 2100o C

 Yields for 10 µA, 50 MeV e- beam (1011 fissions/s)

Y. Oganessian et al., NPA 701 (2002) 87c

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Rialto: Resonant laser ionisation for beam selectivity

refractory Lanthanide Region Semi refractory (slow release from UCx) Semi refractory

The variety of the physics program at ALTO strongly depends on RIB availability, intensity and purity

IN-TIS CHEMISTRY fluorination LASER ION SOURCE efficiency, Z-selectivity

first successfully laser ionized beam

Phys. Rev. C 88,

047301 (2013)

S. Franchoo et al.

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BEDO setup in gamma mode 4 small EXOGAM clovers BEDO setup in neutron mode Dubna neutron detector TETRA borated polyethylene shielding ~90 3He tubes

gamma neutron

Ge detectors BGO shields

Ge LaBr3 LaBr3 LaBr3 BaF2

Distances / source :

Ge = 40 mm
LaBr3 = 25 mm
BaF2 et LaBr3 = 40 mm
Plastique = 25 mm

fast timing mode

1 2 3

(1st physics exp. last year)

Progress in the instrumentation of the secondary beam lines BEDO : BEta Decay studies at Orsay

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Present RIB setups and near-future projects

Parrne mass separator

BEDO/TETRA (existing) TETRA (existing) Identification station

POLAREX

LTNO (3He/4He)

MLLTRAP

Mass measurements

LINO

Laser-Induced nuclear

rientation (µ,Q, Jp)

TAS RFQ

Cooling, bunching

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

SLIDE 20

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)

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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)