Experimental evaluation of neutron induced noise on gated x- ray framing cameras

Experimental evaluation of neutron induced noise on gated x- ray framing cameras


Izumi, N, Stone, G, Hagmann, C, Sorce, C, Bradley, D K, Moran, M, Landen, O L, Springer, P, Stoeffl, W, Tommasini, R, Hermann, H W, Kyrala, G A, Glebov, V Y, Knauer, J, Sangster, T C, & Koch, J A. (2010). Experimental evaluation of neutron induced noise on gated x-ray framing cameras. Journal of Physics: Conference Series, 244, 032048. https://doi.org/10.1088/1742-6596/244/3/032048 


  • Neutron-induced background
  • Gated x-ray framing camera
  • Inertial confinement fusion
  • Micro-channel plate (MCP)
  • Phosphor
  • Photographic film
  • Fiber optic plate (FOP)
  • Neutron fluence
  • Signal-to-background ratio
  • Omega laser facility
  • National Ignition Facility (NIF)


Neutron-induced backgrounds on gated x-ray framing cameras used in inertial confinement fusion experiments can be mitigated, but not eliminated, by turning off the camera's sensitivity when the neutrons arrive at the detector. Although the x-ray sensitivity of the camera can be switched off, the time-integrating components (phosphor, photographic film) are still sensitive to the neutrons.


This article, published in 2010 in the Journal of Physics: Conference Series, is about neutron-induced noise on gated x-ray framing cameras. The authors are N Izumi, G Stone, C Hagmann, C Sorce, D K Bradley, M Moran, O L Landen, P Springer, W Stoeffl, R Tommasini, H W Hermann, G A Kyrala, V Y Glebov, J Knauer, T C Sangster, and J A Koch.


Gated x-ray framing cameras are used to observe the shape of x-ray self-emission from compressed core of imploded capsules. The cameras are sensitive to neutron-induced backgrounds. The authors conducted experiments to understand the mechanisms of neutron-induced background. They found that about 50% of the background was non-optical exposure, 40% was from the Fiber Optic Plate (FOP), and 10% was from the phosphor. They concluded that the background exposure was neutron-induced and linearly dependent on neutron fluence.

Origin: https://iopscience.iop.org/article/10.1088/1742-6596/244/3/032048/pdf


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