status of n tof · m. barbagallo, status of n_tof, 60th isolde and n_tof committee, cern, 7-8...
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![Page 1: Status of n TOF · M. Barbagallo, Status of n_TOF, 60th ISOLDE and n_TOF Committee, CERN, 7-8 November 2018 Conclusions • n_TOF Phase-3 experimental program has been successfully](https://reader035.vdocuments.mx/reader035/viewer/2022062605/5fd125ebb76dc241b82f07bc/html5/thumbnails/1.jpg)
60th ISOLDE and n_TOF Committee, CERN, 7-8 November 2018
M. Barbagallo, on behalf of the n_TOF Collaboration
Status of n_TOF
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n_TOF P.O.T.
M. Barbagallo, Status of n_TOF, 60th ISOLDE and n_TOF Committee, CERN, 7-8 November 2018
Shown at FOM 06/11/18
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Experimental Program
M. Barbagallo, Status of n_TOF, 60th ISOLDE and n_TOF Committee, CERN, 7-8 November 2018
Apr-May
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M. Barbagallo, Status of n_TOF, 60th ISOLDE and n_TOF Committee, CERN, 7-8 November 2018
Jun-Aug
Experimental Program
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M. Barbagallo, Status of n_TOF, 60th ISOLDE and n_TOF Committee, CERN, 7-8 November 2018
Sep-Nov
Experimental Program
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M. Barbagallo, Status of n_TOF, 60th ISOLDE and n_TOF Committee, CERN, 7-8 November 2018
Experimental Program
In total 13 experiments have been performed:
• 6 (n,g) energy differential cross-section measurements
• 2 (n,cp) energy differential cross-section measurements
• 5 (n,f) energy differential cross-section measurements + 1 g multiplicity and Z/A FFs distribution
46%
38%
16%
(n,f)(n,g)
(n,cp)
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M. Barbagallo, Status of n_TOF, 60th ISOLDE and n_TOF Committee, CERN, 7-8 November 2018
Experimental Program
8 detector tests carried out (mostly in parasitic mode)
46%
38%
16%
(n,f)(n,g)
(n,cp)
In total 13 experiments have been performed:
• 6 (n,g) energy differential cross-section measurements
• 2 (n,cp) energy differential cross-section measurements
• 5 (n,f) energy differential cross-section measurements + 1 g multiplicity and Z/A FFs distribution
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M. Barbagallo, Status of n_TOF, 60th ISOLDE and n_TOF Committee, CERN, 7-8 November 2018
A few preliminary results
80Se(n,g) (CERN-INTC-2018-005/INTC-P-536) Thermal conditions in Massive Stars
Previous data
3 keV cut-off strongly affects MACS at 30 keV (He burning)Very short flight path (60 cm)
background
80Se(n,g)
new4x C6D6
EAR1
beam
Courtesy of V. Babiano
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M. Barbagallo, Status of n_TOF, 60th ISOLDE and n_TOF Committee, CERN, 7-8 November 2018
A few preliminary results
i-TED detector test (CERN-INTC-2018-006/INTC-P-537)
• Lower neutron sensitivity
• Higher selectivity
• Compton imaging with
SiPM+LaCl3
EAR12x C6D6
i-TED
79Se
EAR21x C6D6
i-TED
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M. Barbagallo, Status of n_TOF, 60th ISOLDE and n_TOF Committee, CERN, 7-8 November 2018
A few preliminary results
i-TED detector test (CERN-INTC-2018-006/INTC-P-537)
Scatter Absorber Both in coincidence
56Fe(n,g)@EAR1
Scatter Absorber
93Nb(n,g)@EAR2
Courtesy of C. Domingo Pardo
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M. Barbagallo, Status of n_TOF, 60th ISOLDE and n_TOF Committee, CERN, 7-8 November 2018
A few preliminary results
12C(n,p/d) (CERN-INTC-2017-001/INTC-P-488) Cross-section above threshold up to 30 MeV for
medical applications and nuclear technologies
g-flash (1.5 ms wide)Coincidence at 1.2 ms after g-flash
TOF
Am
plit
ud
e
2 Silicon telescopes at different angles
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M. Barbagallo, Status of n_TOF, 60th ISOLDE and n_TOF Committee, CERN, 7-8 November 2018
A few preliminary results
12C(n,p/d) (CERN-INTC-2017-001/INTC-P-488) Cross-section above threshold up to 30 MeV for
medical applications and nuclear technologies
2 Silicon telescopes at different angles
Amplitude
Am
plit
ud
e
i-TED
C12
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M. Barbagallo, Status of n_TOF, 60th ISOLDE and n_TOF Committee, CERN, 7-8 November 2018
A few preliminary results
12C(n,p/d) (CERN-INTC-2017-001/INTC-P-488) Cross-section above threshold up to 30 MeV for
medical applications and nuclear technologies
2 Silicon telescopes at different angles
Amplitude
Am
plit
ud
e
i-TED
C12
TOF>200 ns
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M. Barbagallo, Status of n_TOF, 60th ISOLDE and n_TOF Committee, CERN, 7-8 November 2018
A few preliminary results
Proton Recoil Telescope (CERN-INTC-2017-036/INTC-P-507)
FCPPAC
T1
T2 T3
TOF
Am
plit
ud
e
235U(n,f) cross-section relative to n-pscattering above 200 MeV
Courtesy of E. Pirovano
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M. Barbagallo, Status of n_TOF, 60th ISOLDE and n_TOF Committee, CERN, 7-8 November 2018
A few preliminary results
230Th(n,f) (CERN-INTC-2017-009/INTC-P-493) Lack of data for TH/U fuel cycle
Previous data
Measurement performed in both Experimental Areas:
• EAR1Threshold and high energy part (>300 keV)
• EAR2Subthreshold and low energy part (<300 keV),Including resonances (if any)
@EAR1 @EAR2 Contaminants not yes subtracted
Courtesy of V. Michalopoulou
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M. Barbagallo, Status of n_TOF, 60th ISOLDE and n_TOF Committee, CERN, 7-8 November 2018
A few preliminary results
16O (CERN-INTC-2015-001/INTC-P-430)
First of a set of measurements for nuclear technologies,
nuclear Astrophysics and nuclear medicine.
Challenging measurement with gaseous target @n_TOF
(Response to g-flash, background rejection)
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M. Barbagallo, Status of n_TOF, 60th ISOLDE and n_TOF Committee, CERN, 7-8 November 2018
A few preliminary results
16O (CERN-INTC-2015-001/INTC-P-430)
Fission Fragment from En=15MeV on top of (n,el) background
Structure from the switch
Actual region of the gamma flash
Courtesy of S. Urlass
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M. Barbagallo, Status of n_TOF, 60th ISOLDE and n_TOF Committee, CERN, 7-8 November 2018
A few preliminary results
16O (CERN-INTC-2015-001/INTC-P-430)
a from 235U decay
Courtesy of S. Urlass
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M. Barbagallo, Status of n_TOF, 60th ISOLDE and n_TOF Committee, CERN, 7-8 November 2018
A few preliminary results
HPGe detector test@EAR1
Open in the near future a wide set of (n,xn)measurements at n_TOF
Main limitation: g-flash Solution: Switch system
Energy resolution 9.5 keV
Enegy deposited [keV]
Co
un
ts
Eneg
yd
epo
site
d [
keV
]
TOF-GateDelay [ms]Courtesy of C. Petrone
88Y source+beam(no sample)
GATE==3ms GATE==3ms
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M. Barbagallo, Status of n_TOF, 60th ISOLDE and n_TOF Committee, CERN, 7-8 November 2018
Conclusions
• n_TOF Phase-3 experimental program has been successfully completed before LS2.
• In general preliminary results for the experiments performed look good and data analysis isproceeding smoothly.
• Detectors development for new Physics studies at n_TOF has been performed and preliminaryresults look extremely promising.
• The successful completion of the n_TOF experimental program is also the result of a fruitfulcollaboration with RP team, PS team and ISOLDE.