Neutron-induced noise in National Ignition Facility-class diagnostic instruments
Journal Article
·
· Review of Scientific Instruments
- Lawrence Livermore National Laboratory, Livermore, California 94550 (United States)
Neutron yields from deuterium{endash}tritium-filled inertial-confinement-fusion targets have reached 10{sup 14}. Above 10{sup 13}, a significant neutron-induced background appears in images recorded with nearby streak cameras. Since camera components (streak tube, image-intensifier tube, and charge coupled device arrays) are similar to components that will be used in many National Ignition Facility (NIF) instruments, streak camera images provide information about neutron-induced backgrounds that will be encountered in the NIF environment. At a fluence of 10{sup 7} neutrons/cm{sup 2}, the background consists of two distinct components: a uniform component equal to nearly 20{percent} of the camera{close_quote}s linear range and sharp, intense spikes each localized to just a couple of image pixels. About 80{percent} of the uniform background is caused by interactions with the streak tube and image-intensifier tube. Nearly all the sharp spikes are caused by interactions with pixels of the charged-coupled device array. The spikes make the most significant contribution to image noise.
- Research Organization:
- Lawrence Livermore National Laboratory
- DOE Contract Number:
- W-7405-ENG-48
- OSTI ID:
- 451821
- Report Number(s):
- CONF-960543--
- Journal Information:
- Review of Scientific Instruments, Journal Name: Review of Scientific Instruments Journal Issue: 1 Vol. 68; ISSN 0034-6748; ISSN RSINAK
- Country of Publication:
- United States
- Language:
- English
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