Experimental validation of the Gaseous Proton Recoil Telescope for quasi-absolute neutron flux measurements
Fuente:
arXiv
Gespeichert in:
| Hauptverfasser: | , , , , , , , , |
|---|---|
| Format: | Preprint |
| Veröffentlicht: |
2024
|
| Schlagworte: | |
| Online-Zugang: | |
| Tags: |
Tag hinzufügen
Keine Tags, Fügen Sie den ersten Tag hinzu!
|
| _version_ | 1866910752042909696 |
|---|---|
| author | Chatel, Carole Mathieu, Ludovic Aïche, Mourad Rebii, Abdel Amami, Hedi El Dufort, Benoît Diakaki, Maria Bouland, Olivier Noguère, Gilles |
| author_facet | Chatel, Carole Mathieu, Ludovic Aïche, Mourad Rebii, Abdel Amami, Hedi El Dufort, Benoît Diakaki, Maria Bouland, Olivier Noguère, Gilles |
| contents | The accuracy of neutronics simulations of actual or future reactor cores is nowadays driven by the precision of the nuclear data used as input. Among the most important neutron-induced fission cross sections to understand well are the actinides. It is, indeed, of primary importance to know accurately these cross sections around 1 MeV for the safety of Generation IV reactors. High accuracy measurements of neutron flux are essential for accurate cross section measurements; measurements of this flux with respect to the 1 H(n,n)p cross section can be made with the proton recoil technique. For an accurate measurement below 1 MeV, the Gaseous Proton Recoil Telescope (GPRT) is developed and characterized, with the aim to provide quasi-absolute neutron flux measurements with an accuracy better than 2%. This detector is composed of a double ionization chamber with a Micromegas segmented detection plane. The pressure of the gas can be adjusted to protons stopping range -and therefore to neutrons energy. An accurate neutron flux measurement requires that the GPRT has an intrinsic efficiency of 100%, and thus an important effort has been made to verify this. An alpha source and proton micro-beam have been used and the intrinsic efficiency is confirmed to be 100%. Additionally, the dead-time of the detector has been investigated on a test bench, and is found to be 7.3 ms. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2412_14213 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Experimental validation of the Gaseous Proton Recoil Telescope for quasi-absolute neutron flux measurements Chatel, Carole Mathieu, Ludovic Aïche, Mourad Rebii, Abdel Amami, Hedi El Dufort, Benoît Diakaki, Maria Bouland, Olivier Noguère, Gilles Instrumentation and Detectors Nuclear Experiment The accuracy of neutronics simulations of actual or future reactor cores is nowadays driven by the precision of the nuclear data used as input. Among the most important neutron-induced fission cross sections to understand well are the actinides. It is, indeed, of primary importance to know accurately these cross sections around 1 MeV for the safety of Generation IV reactors. High accuracy measurements of neutron flux are essential for accurate cross section measurements; measurements of this flux with respect to the 1 H(n,n)p cross section can be made with the proton recoil technique. For an accurate measurement below 1 MeV, the Gaseous Proton Recoil Telescope (GPRT) is developed and characterized, with the aim to provide quasi-absolute neutron flux measurements with an accuracy better than 2%. This detector is composed of a double ionization chamber with a Micromegas segmented detection plane. The pressure of the gas can be adjusted to protons stopping range -and therefore to neutrons energy. An accurate neutron flux measurement requires that the GPRT has an intrinsic efficiency of 100%, and thus an important effort has been made to verify this. An alpha source and proton micro-beam have been used and the intrinsic efficiency is confirmed to be 100%. Additionally, the dead-time of the detector has been investigated on a test bench, and is found to be 7.3 ms. |
| title | Experimental validation of the Gaseous Proton Recoil Telescope for quasi-absolute neutron flux measurements |
| topic | Instrumentation and Detectors Nuclear Experiment |
| url | https://arxiv.org/abs/2412.14213 |