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These pages provide an access point to data contained in CCFE published journal papers.  By selecting a paper, and then a specific figure or table, you can request the related underlying data if it is available for release.

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Publication Figures

Publication Date:
2015-03-25

First Author:
Mark R. Gilbert

Title:
Optimising the neutron environment of Radiation Portal Monitors: a computational optimisation study

Paper Identifier:
CP/15/2

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Figure Reference Title Description Number of Figure Data Items Identifier Download Figure Details
Figure 12b Figure 12b RPM Horizontal cross section through the MCNPX geometry used to optimise the rectangular air cavity around the helium tube detector. 0 CF/15/32 Download
Figure 15 Figure 15 RPM Flux spectra recorded in the helium detector for the optimal air-gap geometries - compared to the base line model with no air-gap. 1 CF/15/33 Download
Figure 5b Figure 5b RPM Source responses for the unshielded RPM, and the default, 5cm thick shielded and shield+collimator configurations with an assumed asphalt ground material. Cumulative response over a 2 s acquisition at 2m/s with horizontal lines defining the associated background alarm levels. 1 CF/15/35 Download
figure 5a Figure 5a RPM Source responses for the unshielded RPM, and the default, 5cm thick shielded and shield+collimator configurations with an assumed asphalt ground material. Absolute response in counts/s as a function of position of the threat source. 0 CF/15/37 Download
Figure 8 Figure 8 RPM Plot showing the variation in detector response as a function of collimator and forward shielding depth. Each data point has been calculated from the reaction rates in two separate MCNPX output files (also available from the repository). These were processed following the equations in the paper, and the compiled results are given in depth_results.dat, which is attached to this entry. 1 CF/15/4 Download
figure 6 Figure 6 RPM Top view model image of single detector generated by MCNPX and modified by gnuplot. 0 CF/15/5 Download
figure 9 Figure 9 RPM Plot showing the variation in detector response as a function of collimator depth and profile. Each data point has been calculated from the reaction rates in two separate MCNPX output files (also available from the repository). These were processed following the equations in the paper, and the compiled results are given in conical_results.dat, which is attached to this entry. 1 CF/15/6 Download
figure 10 Figure 10 RPM Plot showing the variation in detector response as a function of collimator depth and density. Each data point has been calculated from the reaction rates in two separate MCNPX output files (also available from the repository). These were processed following the equations in the paper, and the compiled results are given in pack_results.dat, which is attached to this entry. 1 CF/15/8 Download
Figure 2 Figure 2 RPM Comparison of background spectra measured in the He3 tubes of the RPM detector in the presence of different ground materials. 1 CF/15/10 Download
Figure 3 Figure 3 RPM Background counts in the detector for different ground materials. 0 CF/15/12 Download
Figure 18 Figure 18 RPM Plot showing the variation in detector response as a function of collimator depth and profile for the modified detector unit configuration. Each data point has been calculated from the reaction rates in two separate MCNPX output files (also available from the repository). These were processed following the equations in the paper, and the compiled results are given in conical_results.dat, which is attached to this entry. 1 CF/15/13 Download
Fgiure 17 Figure 17 RPM Plot showing the variation in detector response as a function of collimator and forward shielding depth for the modified detector unit configuration. Each data point has been calculated from the reaction rates in two separate MCNPX output files (also available from the repository). These were processed following the equations in the paper, and the compiled results are given in depth_results.dat, which is attached to this entry. 1 CF/15/14 Download
Fgiure 19 Figure 19 RPM Plot showing the variation in detector response as a function of collimator depth and density for the modified detector unit configuration. Each data point has been calculated from the reaction rates in two separate MCNPX output files (also available from the repository). These were processed following the equations in the paper, and the compiled results are given in pack_results.dat, which is attached to this entry. 1 CF/15/17 Download
figure 7a Figure 7a RPM Top view model image of single detector generated by MCNPX and modified by gnuplot, showing the conical profile of the collimator holes. 0 CF/15/19 Download
Figure 1 Figure 1a RPM Model views of the bare RPM detector set-up used in the simulations. 0 CF/15/20 Download
Figure 7b Figure 7b RPM Zoomed Top view model image of single detector generated by MCNPX and modified by gnuplot, showing the conical profile of the collimator holes. 0 CF/15/21 Download
Figure 13 Figure 13 RPM Reaction rate (RR) results in the helium tube detector as a function of the three design optimisation parameters with a cylindrical air cavity. Each RR was extracted directly from the MCNP output file for each configuration. These files (one for each point) are available from the repository and the compiled results in spherical_results.dat are attached to this entry. 1 CF/15/22 Download
Figure 14 Figure 14 RPM Reaction rate (RR) results in the helium tube detector as a function of the three design optimisation parameters with a rectangular air cavity. Each RR was extracted directly from the MCNP output file for each configuration. These files (one for each point) are available from the repository and the compiled results in linear_results.dat are attached to this entry. 1 CF/15/23 Download
Figure 1 (rhs) Figure 1b RPM 3D view of bare RPM detectors 0 CF/15/26 Download
Figure 4 (top) Figure 4a RPM top view of basic detector set-up, showing helium tubes, threat position, and collimator positions. Generated by MCNPX and modified using gnuplot 0 CF/15/27 Download
Figure 4 (bottom) Figure 4b RPM Solidworks 3D rendering of an individual detector panel. 0 CF/15/28 Download
Figure 11a Figure 11a RPM Vertical cross section through the MCNPX geometry used to optimise the cylindrical air cavity around the helium tube detector. 0 CF/15/29 Download
Figure 12a Figure 12a RPM Vertical cross section through the MCNPX geometry used to optimise the rectangular air cavity around the helium tube detector. 0 CF/15/30 Download
Figure 11b Figure 11b RPM Horizontal cross section through the MCNPX geometry used to optimise the cylindrical air cavity around the helium tube detector. 0 CF/15/31 Download