IRFU, CEA Laboratoire Léon Brillouin CEA/CNRS Université Paris-Saclay CEA Saclay 91191 Gif-sur-Yvette France - Laboratoire Léon ...
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Laboratoire Léon Brillouin CEA/CNRS
IRFU, CEA
www.cea.fr
www.cea.fr Université Paris-Saclay
CEA Saclay 91191 Gif-sur-Yvette France
CONTEXTE
Years 2000: Golden Age in Europe
>30000 Instrument.Days for a community of 6000-8000 users
Neutrons in Europe in France
(baseline ERFRI scenario)
6000
SHARP+SAM+GAPS@ILL
5000 PA20@PSI
Days.Spectrometers
LLB
4000
ILL -94%
3000
ESS
2000
1000
0
2014 2017 2020 2023 2026 2029 2032 2035
ESFRI Report, Neutron scattering facilities in Europe,
Present status and future perspectives, 2017
The IPHI – Neutrons demonstrator
Objective:
Test the different key elements of a compact source
Accelerator Ipeak > 60mA
Target Lifetime ~1000 – 2000 hours (at 50kW)
Moderator Produce thermal and cold neutrons
Instruments
The SESAME “IPHI – Neutrons”
2018-2020
Operation at 50kW (Ep = 3MeV) on a beryllium target
A “generic” scattering instrument
| PAGE 3
IPHI - Neutrons
1 « generic » instrument : SANS, réflectomètre, imagerie, diffraction
Mesurements
5 AOÛT 2019 on samples – prrof of concept - performances
TARGET - MODERATOR – SHIELDING
Target – moderator –
shielding box
Target
TMR mounted on 2
trolleys
for an « easy opening »
TARGET TESTS SPRING 2019
Operation at 3kW power on the target
Ep = 3MeV, peak current 20mA, pulse length 2850µs, frequency 17Hz
Average power density on the target 650W/cm² (in the center of the target)
Peak power in a pulse 60kW
Operation at high temperature (500°C) to promote the diffusion of implanted protons
Mai – June 2019
Operation for more than 50 heures at 3kW (over ~2 weeks)
Average proton current = 0.9mA
Proton fluence on the target ~ 50mA.heures ~ 8x1020 protons/m²
On-line optical control of the target state
No visible change of the surface roughness
8-9 hours operation per day
| PAGE 6
« RADIOGRAPHIE » SETUP
Canal
d’extraction Image
Plate
| PAGE 7
MONTAGE DE RADIOGRAPHIE
Image Plate montée derrière une
plaque de plomb
| PAGE 8
NEUTRON RADIOGRAPHY
IPHI 1hour à 3kW Standard ASTM
Spacer 15µm
Mire Siemens Rondelle en plastique lithié
Standard ASTM Cordon pyrotechnique
Beam Purity indicator Relai pyrotechnique
Fente 200µm dans Cd G45 « standard conditions » (P = 14MW)
DIFFRACTION SETUP
Crystal in 4 Source
cercles craddle
Detector MT32
(30x30cm)
| PAGE 10DIFFRACTION
Detector MT32 (32 tubes of 300mm) at 90° from the beam axis
graphite crystal – no collimation
50Hz, 200µs, 600W, 20 min
Poor efficiency of the MT32 detector for thermal neutrons
Prompt pulse
??
Raw data After integration | PAGE 11REFLECTIVITY SETUP
Detector
collimator
entrance
Neutron mirror
Collimation slit
7mm
Source
| PAGE 12REFLECTIVITY
Neutron super-miror
Operation à 50Hz, 400µs, 1.2kW, 10 min
Prompt pulse
Direct beam
Reflectivity signalWORKPLAN 2019 - 2020
Fall 2019
Ramping of the accelerator to 50 kW
Design of the 50kW target (scaling of the 3kW target design + beam sweeping)
New thermal PSD detector
SANS & powder diffraction
Other tests on ESS devices (monitors, détectors)
Winter 2020
Shielding improvements
Scattering spectromeer improvements
Neutron guide
Collimation slits
Tests target 50 kW
Tests cold moderator (para – H2)
Spring 2020
Operation [Radiography – Reflectometry – Diffraction – SANS]
Améliorations rapports signal / bruit
Qualification performances CANS extrapolation pour SONATE (Ep = 20MeV, flux 200)NUMERICAL SIMULATION QUALIFICATIONS
Numerical simulations of the neutron production on a CANS
MCNP and GEANT4 1.00E+07
Exp. data
G4 Physics 1
1.00E+06 G4 Physics 2
n/cm2/s/mA 1.00E+05
1.00E+04
1.00E+03
0 5 10 15 20 25 cm
Definition of a reference design SONATE
Ep = 20 MeV, Ipeak = 100 mA, duty cycle = 4%, P = 80 kW
| PAGE 15INSTRUMENTS PERFORMANCE ON A COMPACT SOURCE
Reference design SONATE
Ep = 20 MeV, Ipeak = 100 mA, duty cycle = 4%, P = 80 kW
Reflectivity
SELENE (small samples)
SANS Focussing SANS (small Q)
Powder diffraction Large area PSD
Imaging (white
beam) MCP detectors
Imaging (energy
resolved) MCP detectors
Direct TOF
Backscattering
Inverse TOF
Spin-Echo Multi-MUSES
10000 100000 1000000 10000000 100000000 1000000000
5 AOÛT Existing
2019 instruments (LLB-ISIS) SONATE SONATE with new technology2030: 10 INSTRUMENTS
AROUND 2 TARGETS
IMAGINE
MUSES
PRESTO - 7C2
Test
HERMES
PACE
Inverse
Diffraction 2 TOF
5 AOÛT 2019 | PAGE 17
TOFCONCLUSIONS
The performances of a compact source are potentially equivalent to a
medium scale research reactor or spallation source
Reduced cost compared to a reactor
Technologically
Accelerator OK
Cible tests under way (+ other solutions under dev.)
Moderator OK / can be updated over the time
Instruments OK
Possibility to benefit from the French ecosystem
Scientific and technical expertise at Saclay and Grenoble
Wide user base
Possibility to reuse the efforts injected into ESS
Accelerator construction
Instruments designs
Detector developments
Reduction et data processing
Existing instrumentation / available
A CANS for a materials science plateformIPHI – NEUTRONS & SONATE CONTRIBUTORS
Monte-Carlo simulations Target - moderator
H.N. Tran (IRFU/SPhN) (post-doc) N. Sellami (IRFU/SIS)
L. Thulliez (IRFU/SPhN) B. Annighöfer (IRAMIS/LLB)
A. Marchix (IRFU/SPhN) P. Permingeat (IRAMIS/LLB)
A. Letourneau (IRFU/SPhN)
J. Darpentigny (IRAMIS/LLB) Neutron measurements
G. Gigante CEA/SPR (shielding / activation)
J. Darpentigny (IRAMIS/LLB)
F. Ott (IRAMIS/LLB)
IPHI A. Menelle (IRAMIS/LLB)
J. Schwindling (IRFU/SACM)
N. Chauvin (IRFU/SACM) Technical support
F. Sénée K. Jiguet (IRAMIS/LLB)
B. Pottin, G. Perreu W. Josse (IRAMIS/LLB)
A. Dubois F. Gibert (IRAMIS/LLB)
D. Chirpaz, Y. Sauce B. Homatter (IRAMIS/LLB)
O. Kuster, C. Deberles P. Lavie (IRAMIS/LLB)
J.-L. Meuriot (IRAMIS/LLB)
Instruments simulations F. Prunes (IRAMIS/LLB)
X. Fabrèges (IRAMIS/LLB) G. Exil, R. Lautié, E. Jorgji
A. Menelle (IRAMIS/LLB)
F. Ott (IRAMIS/LLB) Strategic support
F. Porcher (IRAMIS/LLB) C. Alba-Simionesco (IRAMIS/LLB)
R. Duperrier (IRFU/SACM)
A. Leservot (DRF/DCEPI)You can also read
