| Issue |
EPJ Web Conf.
Volume 231, 2020
8th International Meeting of Union for Compact Accelerator-Driven Neutron Sources (UCANS-8)
|
|
|---|---|---|
| Article Number | 01006 | |
| Number of page(s) | 6 | |
| Section | Compact Sources and Projects | |
| DOI | https://doi.org/10.1051/epjconf/202023101006 | |
| Published online | 11 March 2020 | |
https://doi.org/10.1051/epjconf/202023101006
Development of a Setup for Material Identification Based on Laser-Driven Neutron Resonance Spectroscopy
1 Technische Universität Darmstadt, Institut für Kernphysik, 64289 Darmstadt, Germany
2 GSI Helmholtzzentrum für Schwerionenforschung, 64291 Darmstadt, Germany
3 Helmholtzinstitut Jena, 07743 Jena, Germany
* Corresponding author: m.zimmer@gsi.de
Published online: 11 March 2020
With the phasing out of many research reactors over the upcoming years, a shortcoming of small and medium sized neutron sources is to be expected. Laser-driven neutron sources have the potential to fill this void, with enormous progress being made in laser technology over the past years. Upcoming petawatt lasers with high repetition rates up to 10 Hz promise a tremendous increase in neutron flux. In this paper, a setup is developed and optimized to conduct neutron resonance spectroscopy at a laser-driven neutron source. This setup is then evaluated at an experimental campaign at the PHELIX laser system. Laser intensities up to 1021 W/cm² with a ns pre-pulse contrast of 10-7 were used for ion acceleration, resulting in (1.8±0.7)×108 N/sr per pulse corresponding to (2.3±1.0)×109 N in a 4 π equivalent. These pulses were moderated, collimated and investigated via the time of flight method in order to characterize the thermal neutron spectrum as well as the signal to noise ratio.
© The Authors, published by EDP Sciences, 2020
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