Phased plan for the implementation of the time-resolving magnetic recoil spectrometer on the National Ignition Facility (NIF)
<jats:p> The time-resolving magnetic recoil spectrometer (MRSt) is a transformative diagnostic that will be used to measure the time-resolved neutron spectrum from an inertial confinement fusion implosion at the National Ignition Facility (NIF). It uses a CD foil on the outside of the hohlraum...
| Main Authors: | , , , , , , , , |
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| Other Authors: | |
| Format: | Article |
| Language: | English |
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AIP Publishing
2022
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| Online Access: | https://hdl.handle.net/1721.1/145504 |
| _version_ | 1811098197177663488 |
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| author | Kunimune, JH Gatu Johnson, M Moore, AS Trosseille, CA Johnson, TM Berg, GPA Mackinnon, AJ Kilkenny, JD Frenje, JA |
| author2 | Massachusetts Institute of Technology. Plasma Science and Fusion Center |
| author_facet | Massachusetts Institute of Technology. Plasma Science and Fusion Center Kunimune, JH Gatu Johnson, M Moore, AS Trosseille, CA Johnson, TM Berg, GPA Mackinnon, AJ Kilkenny, JD Frenje, JA |
| author_sort | Kunimune, JH |
| collection | MIT |
| description | <jats:p> The time-resolving magnetic recoil spectrometer (MRSt) is a transformative diagnostic that will be used to measure the time-resolved neutron spectrum from an inertial confinement fusion implosion at the National Ignition Facility (NIF). It uses a CD foil on the outside of the hohlraum to convert fusion neutrons to recoil deuterons. An ion-optical system positioned outside the NIF target chamber energy-disperses and focuses forward-scattered deuterons. A pulse-dilation drift tube (PDDT) subsequently dilates, un-skews, and detects the signal. While the foil and ion-optical system have been designed, the PDDT requires more development before it can be implemented. Therefore, a phased plan is presented that first uses the foil and ion-optical systems with detectors that can be implemented immediately—namely CR-39 and hDISC streak cameras. These detectors will allow the MRSt to be commissioned in an intermediate stage and begin collecting data on a reduced timescale, while the PDDT is developed in parallel. A CR-39 detector will be used in phase 1 for the measurement of the time-integrated neutron spectra with excellent energy-resolution, necessary for the energy calibration of the system. Streak cameras will be used in phase 2 for measurement of the time-resolved spectrum with limited spectral coverage, which is sufficient to diagnose the time-resolved ion temperature. Simulations are presented that predict the performance of the streak camera detector, indicating that it will achieve excellent burn history measurements at current yields, and good time-resolved ion-temperature measurements at yields above 3 × 10<jats:sup>17</jats:sup>. The PDDT will be used for optimal efficiency and resolution in phase 3. </jats:p> |
| first_indexed | 2024-09-23T17:11:25Z |
| format | Article |
| id | mit-1721.1/145504 |
| institution | Massachusetts Institute of Technology |
| language | English |
| last_indexed | 2024-09-23T17:11:25Z |
| publishDate | 2022 |
| publisher | AIP Publishing |
| record_format | dspace |
| spelling | mit-1721.1/1455042022-09-30T00:19:24Z Phased plan for the implementation of the time-resolving magnetic recoil spectrometer on the National Ignition Facility (NIF) Kunimune, JH Gatu Johnson, M Moore, AS Trosseille, CA Johnson, TM Berg, GPA Mackinnon, AJ Kilkenny, JD Frenje, JA Massachusetts Institute of Technology. Plasma Science and Fusion Center <jats:p> The time-resolving magnetic recoil spectrometer (MRSt) is a transformative diagnostic that will be used to measure the time-resolved neutron spectrum from an inertial confinement fusion implosion at the National Ignition Facility (NIF). It uses a CD foil on the outside of the hohlraum to convert fusion neutrons to recoil deuterons. An ion-optical system positioned outside the NIF target chamber energy-disperses and focuses forward-scattered deuterons. A pulse-dilation drift tube (PDDT) subsequently dilates, un-skews, and detects the signal. While the foil and ion-optical system have been designed, the PDDT requires more development before it can be implemented. Therefore, a phased plan is presented that first uses the foil and ion-optical systems with detectors that can be implemented immediately—namely CR-39 and hDISC streak cameras. These detectors will allow the MRSt to be commissioned in an intermediate stage and begin collecting data on a reduced timescale, while the PDDT is developed in parallel. A CR-39 detector will be used in phase 1 for the measurement of the time-integrated neutron spectra with excellent energy-resolution, necessary for the energy calibration of the system. Streak cameras will be used in phase 2 for measurement of the time-resolved spectrum with limited spectral coverage, which is sufficient to diagnose the time-resolved ion temperature. Simulations are presented that predict the performance of the streak camera detector, indicating that it will achieve excellent burn history measurements at current yields, and good time-resolved ion-temperature measurements at yields above 3 × 10<jats:sup>17</jats:sup>. The PDDT will be used for optimal efficiency and resolution in phase 3. </jats:p> 2022-09-19T18:15:28Z 2022-09-19T18:15:28Z 2022-08-01 2022-09-19T17:59:18Z Article http://purl.org/eprint/type/JournalArticle https://hdl.handle.net/1721.1/145504 Kunimune, JH, Gatu Johnson, M, Moore, AS, Trosseille, CA, Johnson, TM et al. 2022. "Phased plan for the implementation of the time-resolving magnetic recoil spectrometer on the National Ignition Facility (NIF)." Review of Scientific Instruments, 93 (8). en 10.1063/5.0100996 Review of Scientific Instruments Creative Commons Attribution 4.0 International license https://creativecommons.org/licenses/by/4.0/ application/pdf AIP Publishing American Institute of Physics (AIP) |
| spellingShingle | Kunimune, JH Gatu Johnson, M Moore, AS Trosseille, CA Johnson, TM Berg, GPA Mackinnon, AJ Kilkenny, JD Frenje, JA Phased plan for the implementation of the time-resolving magnetic recoil spectrometer on the National Ignition Facility (NIF) |
| title | Phased plan for the implementation of the time-resolving magnetic recoil spectrometer on the National Ignition Facility (NIF) |
| title_full | Phased plan for the implementation of the time-resolving magnetic recoil spectrometer on the National Ignition Facility (NIF) |
| title_fullStr | Phased plan for the implementation of the time-resolving magnetic recoil spectrometer on the National Ignition Facility (NIF) |
| title_full_unstemmed | Phased plan for the implementation of the time-resolving magnetic recoil spectrometer on the National Ignition Facility (NIF) |
| title_short | Phased plan for the implementation of the time-resolving magnetic recoil spectrometer on the National Ignition Facility (NIF) |
| title_sort | phased plan for the implementation of the time resolving magnetic recoil spectrometer on the national ignition facility nif |
| url | https://hdl.handle.net/1721.1/145504 |
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