1. Nuclear Data Research at LANSCE with Possible Relevance to IFMIF
LA-UR
Nuclear Data Research at LANSCE with Possible Relevance to IFMIF
Robert C. Haight
Los Alamos National Laboratory
IAEA Meeting on Nuclear Data for Advanced Systems – Fusion
October 31 – November 2, 2007

2. IFMIF has many needs for nuclear data
IFMIF neutrons
Activation to 50 MeV
Gas production to 50 MeV – e.g. no Molybdenum
Neutron transport in sample environment
Displacements -- e.g. file MT=444
IFMIF deuterons (and protons??)
Probably lots of data needs: e.g. D+Cu, etc.
Source reaction –
It is what it is; do we need to know it better
Imaging of source for beam steering and focusing

3. Nuclear data measurements at LANSCE are made with several instruments
FIGARO (n,xn+g)
DANCE (n,g)
GEANIE (n,xg)
N,Z (n,charged particle)
Fission
LSDS
Double Frisch-grid fission chamber; also standard fission ion chamber; new detector station for fission and (n,alpha)

4. Side-Coupled Linear Accelerator
Nuclear data experiments at LANSCE use neutrons at the Lujan Center, Target 2 and Target 4.
Isotope Production
Facility (construction)
Proton Radiography
Line B NRAD,
Ultra-Cold Neutrons
H+ Source
H- Source
Drift Tube
Linear
Accelerator
Line D
Area A (inactive)
Side-Coupled Linear Accelerator
Proton
Lujan Center
LSDS
ER-1
Target 1 3 4 5 8 6 7
ER-2 9 10
11A/B 12 13 1 2 14 15 16
PSR
Target 2
GEANIE
90R
120L
DANCE
60R
FIGARO
Target 4
30R
90L
15R
Fission;
(n,alpha)
30L
15L
N,Z

5. GEANIE (n,xg)

6. New GEANIE data significantly improve the 193Ir(n,n’)193mIr cross section database
LLNL/LANL

7. N,Z double-differential cross sections are studied with “standard” detector telescopes

8. We measure hydrogen and helium production cross sections for the Advanced Fuel Cycle Initiative
These data differentiate among evaluations
Contact:
Bob Haight

9. Helium production data is being measured for several materials for neutron energies up to 100 MeV

10. ENDF/B-VII has problems for helium production by neutrons on iron in the 7-13 MeV range

11. Hydrogen production also is being measured

12. FIGARO – Fast neutron-Induced GAmma-Ray Observer
FIGARO (n,xn+g) n X
20 liquid scintillator
neutron detectors
2 gamma-ray detectors

13. Gamma-ray detectors near the sample trigger the event for study of neutron emission – needed for neutron transport
58,60Ni(n,n’)
FIGARO (n,xn+g)
20 Neutron detectors
En from time of flight ~ 1m
“Double time-of-flight“ experiment
Neutron emission in coincidence with gamma rays n x
sample
22 m from WNR source
Neutron emission contingent on one specific g-transition

14. Recapitulate: IFMIF has many needs for nuclear data
IFMIF neutrons
Activation to 50 MeV – GEANIE relevance
Gas production to 50 MeV – (n,z) – ENDF file incomplete
Neutron transport in sample environment - FIGARO
Displacements -- e.g. file MT=444
IFMIF deuterons (and protons??)
Probably lots of data needs: e.g. D+Cu, etc.
Source reaction –
It is what it is; do we need to know it better
Imaging of source for beam steering and focusing