| Title: |
Impulse responses of visible phototubes used in National Ignition Facility neutron time of flight diagnostics |
| Authors: |
Datte, P. S.; Eckart, M.; Moore, A. S.; Thompson, W.; Vergel de Dios, G. |
| Source: |
Review of Scientific Instruments ; volume 87, issue 11 ; ISSN 0034-6748 1089-7623 |
| Publisher Information: |
AIP Publishing |
| Publication Year: |
2016 |
| Description: |
Neutron-induced visible scintillation in neutron time of flight (NToF) diagnostics at the National Ignition Facility (NIF) is measured with 40 mm single stage micro-channel plate photomultipliers and a 40 mm vacuum photodiode, outside the neutron line of sight. In NIF experiments with 14 MeV neutron yields above Y > 10 × 1015 these tubes are configured to deliver of order 1 nC of charge in the nominally 5 ns NToF into a 50 Ω load. We have examined a number of 40 mm tubes manufactured by Photek Ltd. of St. Leonards on Sea, UK, to determine possible changes in the instrument impulse response as a function of signal charge delivered in 1 ns. Precision NToF measurements at approximately 20 m require that we characterize changes in the impulse response moments to |
| Document Type: |
article in journal/newspaper |
| Language: |
English |
| DOI: |
10.1063/1.4962039 |
| DOI: |
10.1063/1.4962039/16051727/11d837_1_online.pdf |
| Availability: |
https://doi.org/10.1063/1.4962039; https://pubs.aip.org/aip/rsi/article-pdf/doi/10.1063/1.4962039/16051727/11d837_1_online.pdf |
| Accession Number: |
edsbas.9F5A4EEB |
| Database: |
BASE |