Numerical study of neutron beam divergence in a beam-fusion scenario employing laser driven ions
The most established route to create a laser-based neutron source is by employing laser accelerated, low atomic-number ions in fusion reactions. In addition to the high reaction cross-sections at moderate energies of the projectile ions, the anisotropy in neutron emission is another important featur...
| Huvudupphovsmän: | , , , , , , , , , , , , , , , , , , , , |
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| Materialtyp: | Journal article |
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Elsevier
2016
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| _version_ | 1826277785574834176 |
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| author | Alejo, A Green, A Ahmed, H Robinson, A Cerchez, M Clarke, R Doria, D Dorkings, S Fernandez, J McKenna, P Mirfayzi, S Naughton, K Neely, D Norreys, P Peth, C Powell, H Ruiz, J Swain, J Willi, O Borghesi, M Kar, S |
| author_facet | Alejo, A Green, A Ahmed, H Robinson, A Cerchez, M Clarke, R Doria, D Dorkings, S Fernandez, J McKenna, P Mirfayzi, S Naughton, K Neely, D Norreys, P Peth, C Powell, H Ruiz, J Swain, J Willi, O Borghesi, M Kar, S |
| author_sort | Alejo, A |
| collection | OXFORD |
| description | The most established route to create a laser-based neutron source is by employing laser accelerated, low atomic-number ions in fusion reactions. In addition to the high reaction cross-sections at moderate energies of the projectile ions, the anisotropy in neutron emission is another important feature of beam-fusion reactions. Using a simple numerical model based on neutron generation in a pitcher–catcher scenario, anisotropy in neutron emission was studied for the deuterium–deuterium fusion reaction. Simulation results are consistent with the narrow-divergence (∼70° full width at half maximum) neutron beam recently served in an experiment employing multi-MeV deuteron beams of narrow divergence (up to 30° FWHM, depending on the ion energy) accelerated by a sub-petawatt laser pulse from thin deuterated plastic foils via the Target Normal Sheath Acceleration mechanism. By varying the input ion beam parameters, simulations show that a further improvement in the neutron beam directionality (i.e. reduction in the beam divergence) can be obtained by increasing the projectile ion beam temperature and cut-off energy, as expected from interactions employing higher power lasers at upcoming facilities. |
| first_indexed | 2024-03-06T23:34:08Z |
| format | Journal article |
| id | oxford-uuid:6d119425-46e1-4b49-9cfb-e0753171572d |
| institution | University of Oxford |
| last_indexed | 2024-03-06T23:34:08Z |
| publishDate | 2016 |
| publisher | Elsevier |
| record_format | dspace |
| spelling | oxford-uuid:6d119425-46e1-4b49-9cfb-e0753171572d2022-03-26T19:15:27ZNumerical study of neutron beam divergence in a beam-fusion scenario employing laser driven ionsJournal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:6d119425-46e1-4b49-9cfb-e0753171572dSymplectic Elements at OxfordElsevier2016Alejo, AGreen, AAhmed, HRobinson, ACerchez, MClarke, RDoria, DDorkings, SFernandez, JMcKenna, PMirfayzi, SNaughton, KNeely, DNorreys, PPeth, CPowell, HRuiz, JSwain, JWilli, OBorghesi, MKar, SThe most established route to create a laser-based neutron source is by employing laser accelerated, low atomic-number ions in fusion reactions. In addition to the high reaction cross-sections at moderate energies of the projectile ions, the anisotropy in neutron emission is another important feature of beam-fusion reactions. Using a simple numerical model based on neutron generation in a pitcher–catcher scenario, anisotropy in neutron emission was studied for the deuterium–deuterium fusion reaction. Simulation results are consistent with the narrow-divergence (∼70° full width at half maximum) neutron beam recently served in an experiment employing multi-MeV deuteron beams of narrow divergence (up to 30° FWHM, depending on the ion energy) accelerated by a sub-petawatt laser pulse from thin deuterated plastic foils via the Target Normal Sheath Acceleration mechanism. By varying the input ion beam parameters, simulations show that a further improvement in the neutron beam directionality (i.e. reduction in the beam divergence) can be obtained by increasing the projectile ion beam temperature and cut-off energy, as expected from interactions employing higher power lasers at upcoming facilities. |
| spellingShingle | Alejo, A Green, A Ahmed, H Robinson, A Cerchez, M Clarke, R Doria, D Dorkings, S Fernandez, J McKenna, P Mirfayzi, S Naughton, K Neely, D Norreys, P Peth, C Powell, H Ruiz, J Swain, J Willi, O Borghesi, M Kar, S Numerical study of neutron beam divergence in a beam-fusion scenario employing laser driven ions |
| title | Numerical study of neutron beam divergence in a beam-fusion scenario employing laser driven ions |
| title_full | Numerical study of neutron beam divergence in a beam-fusion scenario employing laser driven ions |
| title_fullStr | Numerical study of neutron beam divergence in a beam-fusion scenario employing laser driven ions |
| title_full_unstemmed | Numerical study of neutron beam divergence in a beam-fusion scenario employing laser driven ions |
| title_short | Numerical study of neutron beam divergence in a beam-fusion scenario employing laser driven ions |
| title_sort | numerical study of neutron beam divergence in a beam fusion scenario employing laser driven ions |
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