Eintrag weiter verarbeiten
Calibration of the JET neutron activation system for DT operation
Gespeichert in:
| Zeitschriftentitel: | Review of Scientific Instruments |
|---|---|
| Personen und Körperschaften: | , , , |
| In: | Review of Scientific Instruments, 70, 1999, 1, S. 1137-1140 |
| Format: | E-Article |
| Sprache: | Englisch |
| veröffentlicht: |
AIP Publishing
|
| Schlagwörter: |
| author_facet |
Bertalot, L. Roquemore, A. L. Loughlin, M. Esposito, B. Bertalot, L. Roquemore, A. L. Loughlin, M. Esposito, B. |
|---|---|
| author |
Bertalot, L. Roquemore, A. L. Loughlin, M. Esposito, B. |
| spellingShingle |
Bertalot, L. Roquemore, A. L. Loughlin, M. Esposito, B. Review of Scientific Instruments Calibration of the JET neutron activation system for DT operation Instrumentation |
| author_sort |
bertalot, l. |
| spelling |
Bertalot, L. Roquemore, A. L. Loughlin, M. Esposito, B. 0034-6748 1089-7623 AIP Publishing Instrumentation http://dx.doi.org/10.1063/1.1149332 <jats:p>The neutron activation system at JET is a pneumatic transfer system capable of positioning activation samples close to the plasma. Its primary purpose is to provide a calibration for the time-dependent neutron yield monitors (fission chambers and solid state detectors). Various activation reactions with different high energy thresholds were used including Fe56(n,p) Mn56, Al27(n,α) 24Na, 93Nb(n,2n) 92mNb, and Si28(n,p) 28Al reactions. The silicon reaction, with its short half life (2.25 min), provides a prompt determination of the 14 MeV DT yield. The neutron induced γ-ray activity of the Si samples was measured using three sodium iodide scintillators, while two high purity germanium detectors were used for other foils. It was necessary to use a range of sample masses and different counting geometries in order to cover the wide range of neutron yields (1015–1019 neutrons) while avoiding excessive count rates in the detectors. The absolute full energy peak efficiency calibration of the detectors was measured taking into account the source-detector geometry, the self-attenuation of the samples and cross-talk effects. An error analysis of the neutron yield measurement was performed including uncertainties in efficiency calibration, neutron transport calculations, cross sections, and counting statistics. Cross calibrations between the different irradiation ends were carried out in DD and DT (with 1% and 10% tritium content) discharges. The effect of the plasma vertical displacement was also experimentally studied. An agreement within 10% was found between the 14 MeV neutron yields measured from Si, Fe, Al, Nb samples in DT discharges.</jats:p> Calibration of the JET neutron activation system for DT operation Review of Scientific Instruments |
| doi_str_mv |
10.1063/1.1149332 |
| facet_avail |
Online |
| finc_class_facet |
Allgemeines Technik |
| format |
ElectronicArticle |
| fullrecord |
blob:ai-49-aHR0cDovL2R4LmRvaS5vcmcvMTAuMTA2My8xLjExNDkzMzI |
| id |
ai-49-aHR0cDovL2R4LmRvaS5vcmcvMTAuMTA2My8xLjExNDkzMzI |
| institution |
DE-105 DE-14 DE-Ch1 DE-L229 DE-D275 DE-Bn3 DE-Brt1 DE-D161 DE-Gla1 DE-Zi4 DE-15 DE-Pl11 DE-Rs1 |
| imprint |
AIP Publishing, 1999 |
| imprint_str_mv |
AIP Publishing, 1999 |
| issn |
0034-6748 1089-7623 |
| issn_str_mv |
0034-6748 1089-7623 |
| language |
English |
| mega_collection |
AIP Publishing (CrossRef) |
| match_str |
bertalot1999calibrationofthejetneutronactivationsystemfordtoperation |
| publishDateSort |
1999 |
| publisher |
AIP Publishing |
| recordtype |
ai |
| record_format |
ai |
| series |
Review of Scientific Instruments |
| source_id |
49 |
| title |
Calibration of the JET neutron activation system for DT operation |
| title_unstemmed |
Calibration of the JET neutron activation system for DT operation |
| title_full |
Calibration of the JET neutron activation system for DT operation |
| title_fullStr |
Calibration of the JET neutron activation system for DT operation |
| title_full_unstemmed |
Calibration of the JET neutron activation system for DT operation |
| title_short |
Calibration of the JET neutron activation system for DT operation |
| title_sort |
calibration of the jet neutron activation system for dt operation |
| topic |
Instrumentation |
| url |
http://dx.doi.org/10.1063/1.1149332 |
| publishDate |
1999 |
| physical |
1137-1140 |
| description |
<jats:p>The neutron activation system at JET is a pneumatic transfer system capable of positioning activation samples close to the plasma. Its primary purpose is to provide a calibration for the time-dependent neutron yield monitors (fission chambers and solid state detectors). Various activation reactions with different high energy thresholds were used including Fe56(n,p) Mn56, Al27(n,α) 24Na, 93Nb(n,2n) 92mNb, and Si28(n,p) 28Al reactions. The silicon reaction, with its short half life (2.25 min), provides a prompt determination of the 14 MeV DT yield. The neutron induced γ-ray activity of the Si samples was measured using three sodium iodide scintillators, while two high purity germanium detectors were used for other foils. It was necessary to use a range of sample masses and different counting geometries in order to cover the wide range of neutron yields (1015–1019 neutrons) while avoiding excessive count rates in the detectors. The absolute full energy peak efficiency calibration of the detectors was measured taking into account the source-detector geometry, the self-attenuation of the samples and cross-talk effects. An error analysis of the neutron yield measurement was performed including uncertainties in efficiency calibration, neutron transport calculations, cross sections, and counting statistics. Cross calibrations between the different irradiation ends were carried out in DD and DT (with 1% and 10% tritium content) discharges. The effect of the plasma vertical displacement was also experimentally studied. An agreement within 10% was found between the 14 MeV neutron yields measured from Si, Fe, Al, Nb samples in DT discharges.</jats:p> |
| container_issue |
1 |
| container_start_page |
1137 |
| container_title |
Review of Scientific Instruments |
| container_volume |
70 |
| format_de105 |
Article, E-Article |
| format_de14 |
Article, E-Article |
| format_de15 |
Article, E-Article |
| format_de520 |
Article, E-Article |
| format_de540 |
Article, E-Article |
| format_dech1 |
Article, E-Article |
| format_ded117 |
Article, E-Article |
| format_degla1 |
E-Article |
| format_del152 |
Buch |
| format_del189 |
Article, E-Article |
| format_dezi4 |
Article |
| format_dezwi2 |
Article, E-Article |
| format_finc |
Article, E-Article |
| format_nrw |
Article, E-Article |
| _version_ |
1792347750400000006 |
| geogr_code |
not assigned |
| last_indexed |
2024-03-01T18:00:14.727Z |
| geogr_code_person |
not assigned |
| openURL |
url_ver=Z39.88-2004&ctx_ver=Z39.88-2004&ctx_enc=info%3Aofi%2Fenc%3AUTF-8&rfr_id=info%3Asid%2Fvufind.svn.sourceforge.net%3Agenerator&rft.title=Calibration+of+the+JET+neutron+activation+system+for+DT+operation&rft.date=1999-01-01&genre=article&issn=1089-7623&volume=70&issue=1&spage=1137&epage=1140&pages=1137-1140&jtitle=Review+of+Scientific+Instruments&atitle=Calibration+of+the+JET+neutron+activation+system+for+DT+operation&aulast=Esposito&aufirst=B.&rft_id=info%3Adoi%2F10.1063%2F1.1149332&rft.language%5B0%5D=eng |
| SOLR | |
| _version_ | 1792347750400000006 |
| author | Bertalot, L., Roquemore, A. L., Loughlin, M., Esposito, B. |
| author_facet | Bertalot, L., Roquemore, A. L., Loughlin, M., Esposito, B., Bertalot, L., Roquemore, A. L., Loughlin, M., Esposito, B. |
| author_sort | bertalot, l. |
| container_issue | 1 |
| container_start_page | 1137 |
| container_title | Review of Scientific Instruments |
| container_volume | 70 |
| description | <jats:p>The neutron activation system at JET is a pneumatic transfer system capable of positioning activation samples close to the plasma. Its primary purpose is to provide a calibration for the time-dependent neutron yield monitors (fission chambers and solid state detectors). Various activation reactions with different high energy thresholds were used including Fe56(n,p) Mn56, Al27(n,α) 24Na, 93Nb(n,2n) 92mNb, and Si28(n,p) 28Al reactions. The silicon reaction, with its short half life (2.25 min), provides a prompt determination of the 14 MeV DT yield. The neutron induced γ-ray activity of the Si samples was measured using three sodium iodide scintillators, while two high purity germanium detectors were used for other foils. It was necessary to use a range of sample masses and different counting geometries in order to cover the wide range of neutron yields (1015–1019 neutrons) while avoiding excessive count rates in the detectors. The absolute full energy peak efficiency calibration of the detectors was measured taking into account the source-detector geometry, the self-attenuation of the samples and cross-talk effects. An error analysis of the neutron yield measurement was performed including uncertainties in efficiency calibration, neutron transport calculations, cross sections, and counting statistics. Cross calibrations between the different irradiation ends were carried out in DD and DT (with 1% and 10% tritium content) discharges. The effect of the plasma vertical displacement was also experimentally studied. An agreement within 10% was found between the 14 MeV neutron yields measured from Si, Fe, Al, Nb samples in DT discharges.</jats:p> |
| doi_str_mv | 10.1063/1.1149332 |
| facet_avail | Online |
| finc_class_facet | Allgemeines, Technik |
| format | ElectronicArticle |
| format_de105 | Article, E-Article |
| format_de14 | Article, E-Article |
| format_de15 | Article, E-Article |
| format_de520 | Article, E-Article |
| format_de540 | Article, E-Article |
| format_dech1 | Article, E-Article |
| format_ded117 | Article, E-Article |
| format_degla1 | E-Article |
| format_del152 | Buch |
| format_del189 | Article, E-Article |
| format_dezi4 | Article |
| format_dezwi2 | Article, E-Article |
| format_finc | Article, E-Article |
| format_nrw | Article, E-Article |
| geogr_code | not assigned |
| geogr_code_person | not assigned |
| id | ai-49-aHR0cDovL2R4LmRvaS5vcmcvMTAuMTA2My8xLjExNDkzMzI |
| imprint | AIP Publishing, 1999 |
| imprint_str_mv | AIP Publishing, 1999 |
| institution | DE-105, DE-14, DE-Ch1, DE-L229, DE-D275, DE-Bn3, DE-Brt1, DE-D161, DE-Gla1, DE-Zi4, DE-15, DE-Pl11, DE-Rs1 |
| issn | 0034-6748, 1089-7623 |
| issn_str_mv | 0034-6748, 1089-7623 |
| language | English |
| last_indexed | 2024-03-01T18:00:14.727Z |
| match_str | bertalot1999calibrationofthejetneutronactivationsystemfordtoperation |
| mega_collection | AIP Publishing (CrossRef) |
| physical | 1137-1140 |
| publishDate | 1999 |
| publishDateSort | 1999 |
| publisher | AIP Publishing |
| record_format | ai |
| recordtype | ai |
| series | Review of Scientific Instruments |
| source_id | 49 |
| spelling | Bertalot, L. Roquemore, A. L. Loughlin, M. Esposito, B. 0034-6748 1089-7623 AIP Publishing Instrumentation http://dx.doi.org/10.1063/1.1149332 <jats:p>The neutron activation system at JET is a pneumatic transfer system capable of positioning activation samples close to the plasma. Its primary purpose is to provide a calibration for the time-dependent neutron yield monitors (fission chambers and solid state detectors). Various activation reactions with different high energy thresholds were used including Fe56(n,p) Mn56, Al27(n,α) 24Na, 93Nb(n,2n) 92mNb, and Si28(n,p) 28Al reactions. The silicon reaction, with its short half life (2.25 min), provides a prompt determination of the 14 MeV DT yield. The neutron induced γ-ray activity of the Si samples was measured using three sodium iodide scintillators, while two high purity germanium detectors were used for other foils. It was necessary to use a range of sample masses and different counting geometries in order to cover the wide range of neutron yields (1015–1019 neutrons) while avoiding excessive count rates in the detectors. The absolute full energy peak efficiency calibration of the detectors was measured taking into account the source-detector geometry, the self-attenuation of the samples and cross-talk effects. An error analysis of the neutron yield measurement was performed including uncertainties in efficiency calibration, neutron transport calculations, cross sections, and counting statistics. Cross calibrations between the different irradiation ends were carried out in DD and DT (with 1% and 10% tritium content) discharges. The effect of the plasma vertical displacement was also experimentally studied. An agreement within 10% was found between the 14 MeV neutron yields measured from Si, Fe, Al, Nb samples in DT discharges.</jats:p> Calibration of the JET neutron activation system for DT operation Review of Scientific Instruments |
| spellingShingle | Bertalot, L., Roquemore, A. L., Loughlin, M., Esposito, B., Review of Scientific Instruments, Calibration of the JET neutron activation system for DT operation, Instrumentation |
| title | Calibration of the JET neutron activation system for DT operation |
| title_full | Calibration of the JET neutron activation system for DT operation |
| title_fullStr | Calibration of the JET neutron activation system for DT operation |
| title_full_unstemmed | Calibration of the JET neutron activation system for DT operation |
| title_short | Calibration of the JET neutron activation system for DT operation |
| title_sort | calibration of the jet neutron activation system for dt operation |
| title_unstemmed | Calibration of the JET neutron activation system for DT operation |
| topic | Instrumentation |
| url | http://dx.doi.org/10.1063/1.1149332 |