scholarly journals High-resolution measurements of the DT neutron spectrum using new CD foils in the Magnetic Recoil neutron Spectrometer (MRS) on the National Ignition Facility

2016 ◽  
Vol 87 (11) ◽  
pp. 11D816 ◽  
Author(s):  
M. Gatu Johnson ◽  
J. A. Frenje ◽  
R. M. Bionta ◽  
D. T. Casey ◽  
M. J. Eckart ◽  
...  
Keyword(s):  
High Resolution ◽  
Neutron Spectrum ◽  
National Ignition Facility ◽  
Neutron Spectrometer

Interpolating individual line-of-sight neutron spectrometer measurements onto the “sky” at the National Ignition Facility (NIF)

2021 ◽  
Vol 92 (4) ◽  
pp. 043512 ◽  
Author(s):  
E. P. Hartouni ◽  
R. M. Bionta ◽  
D. T. Casey ◽  
M. J. Eckart ◽  
M. Gatu-Johnson ◽  
...  
Keyword(s):  
Line Of Sight ◽  
National Ignition Facility ◽  
Neutron Spectrometer ◽  
Individual Line

Neutronic calculations in support of the design of the ITER High Resolution Neutron Spectrometer

2011 ◽  
Vol 86 (6-8) ◽  
pp. 1277-1281 ◽  
Author(s):  
F. Moro ◽  
B. Esposito ◽  
D. Marocco ◽  
R. Villari ◽  
L. Petrizzi ◽  
...  
Keyword(s):  
High Resolution ◽  
Neutron Spectrometer

scholarly journals Short pulse, high resolution, backlighters for point projection high-energy radiography at the National Ignition Facility

2017 ◽  
Vol 24 (5) ◽  
pp. 053104 ◽  
Author(s):  
R. Tommasini ◽  
C. Bailey ◽  
D. K. Bradley ◽  
M. Bowers ◽  
H. Chen ◽  
...  
Keyword(s):  
High Resolution ◽  
Short Pulse ◽  
High Energy ◽  
National Ignition Facility ◽  
Point Projection

Conceptual design of the high resolution neutron spectrometer for ITER

2019 ◽  
Vol 59 (6) ◽  
pp. 065001 ◽  
Author(s):  
Marek Scholz ◽  
Anders Hjalmarsson ◽  
Leszek Hajduk ◽  
Göran Ericsson ◽  
Jerzy Kotula ◽  
...  
Keyword(s):  
High Resolution ◽  
Conceptual Design ◽  
Neutron Spectrometer

Preliminary neutronic analyses of ITER high resolution neutron spectrometer collimator

2011 ◽  
Vol 86 (6-8) ◽  
pp. 1204-1208
Author(s):  
Miguel Dapena ◽  
Luigino Petrizzi ◽  
Fabio Moro
Keyword(s):  
High Resolution ◽  
Neutron Spectrometer

scholarly journals The magnetic recoil spectrometer (MRSt) for time-resolved measurements of the neutron spectrum at the National Ignition Facility (NIF)

2016 ◽  
Vol 87 (11) ◽  
pp. 11D806 ◽  
Author(s):  
J. A. Frenje ◽  
T. J. Hilsabeck ◽  
C. W. Wink ◽  
P. Bell ◽  
R. Bionta ◽  
...  
Keyword(s):  
Neutron Spectrum ◽  
National Ignition Facility ◽  
Time Resolved ◽  
Time Resolved Measurements

scholarly journals Conception of a New Recoil Proton Telescope for Real-Time Neutron Spectrometry in Proton-Therapy

2018 ◽  
Vol 170 ◽  
pp. 09001 ◽  
Author(s):  
Rodolphe Combe ◽  
Nicolas Arbor ◽  
Ziad el Bitar ◽  
Stéphane Higueret ◽  
Daniel Husson
Keyword(s):  
Real Time ◽  
Neutron Spectrum ◽  
Proton Therapy ◽  
Recoil Proton ◽  
Reference Method ◽  
Weighting Factor ◽  
High Rate ◽  
Neutron Spectrometry ◽  
Neutron Spectrometer ◽  
Integrated Sensor

Neutrons are the main type of secondary particles emitted in proton-therapy. Because of the risk of secondary cancer and other late occurring effects, the neutron dose should be included in the out-of-field dose calculations. A neutron spectrometer has to be used to take into account the energy dependence of the neutron radiological weighting factor. Due to its high dependence on various parameters of the irradiation (beam, accelerator, patient), the neutron spectrum should be measured independently for each treatment. The current reference method for the measurement of the neutron energy, the Bonner Sphere System, consists of several homogeneous polyethylene spheres with increasing diameters equipped with a proportional counter. It provides a highresolution reconstruction of the neutron spectrum but requires a time-consuming work of signal deconvolution. New neutron spectrometers are being developed, but the main experimental limitation remains the high neutron flux in proton therapy treatment rooms. A new model of a real-time neutron spectrometer, based on a Recoil Proton Telescope technology, has been developed at the IPHC. It enables a real-time high-rate reconstruction of the neutron spectrum from the measurement of the recoil proton trajectory and energy. A new fast-readout microelectronic integrated sensor, called FastPixN, has been developed for this specific purpose.A first prototype, able to detect neutrons between 5 and 20 MeV, has already been validated for metrology with the AMANDE facility at Cadarache. The geometry of the new Recoil Proton Telescope has been optimized via extensive Geant4 Monte Carlo simulations. Uncertainty sources have been carefully studied in order to improve simultaneously efficiency and energy resolution, and solutions have been found to suppress the various expected backgrounds. We are currently upgrading the prototype for secondary neutron detection in proton therapy applications.

A high resolution, low background fast neutron spectrometer

2002 ◽  
Vol 476 (1-2) ◽  
pp. 318-321 ◽  
Author(s):  
J.N Abdurashitov ◽  
V.N Gavrin ◽  
A.V Kalikhov ◽  
V.L Matushko ◽  
A.A Shikhin ◽  
...  
Keyword(s):  
High Resolution ◽  
Fast Neutron ◽  
Neutron Spectrometer ◽  
Low Background
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