A multi-material diagnosis method based on high-energy proton radiography

Fig. 2. Results for a CSO and two collimators. (a) Proton flux along the radial direction. (b) Characteristic parameter calculated by the SMDM and the MMDM. (c) and (d) Characteristic parameter distributions obtained by the SMDM and the MMDM, respectively.

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Fig. 3. Results for the CSO using a collimator and an inverse collimator. (a) Proton flux along the radial direction. (b) Characteristic parameter.

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Fig. 4. Results for the CSO when the second collimator was offset from the central axis. (a) Proton flux along the radial direction. (b) Flux errors. (c) Characteristic parameter. (d) Characteristic parameter errors.

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Fig. 5. (a) Diagram of the hydrodynamic process. (b)–(f) Theoretical results. (b) Proton flux in the radial direction. (c) and (d) ω distributions from SMDM and MMDM, respectively. (e) ω distribution in the radial direction. (f) Density distribution. (g)–(k) Numerical results. (g) Proton flux in the radial direction. (h) and (i) ω distributions from SMDM and MMDM, respectively. (j) ω distribution in the radial direction. (k) Density distribution.

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Table 1. Aperture parameters of the collimators.
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Table 1. Aperture parameters of the collimators.
Angle cut Front end (cm) Back end (cm)
Type (mrad) x y x y
First collimator 8 7.90 9.09 8.11 8.11
Second collimator 0.5 0.86 0.93 0.51 0.51
Inverse collimator 0.5 0.01 0.11 0.51 0.51

Table 2. Parameters of different materials measured for a single-material object by a 20 GeV pRad system.
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Table 2. Parameters of different materials measured for a single-material object by a 20 GeV pRad system.
Material ω μ (cm²/g) M (cm²/g)
Be 0.340 0.0158 0.0465
B 0.245 0.0149 0.0608
C 0.189 0.0142 0.0752
Na 0.099 0.0114 0.1157
Mg 0.083 0.0113 0.1371
Al 0.074 0.0112 0.1523
Si 0.067 0.0110 0.1656
K 0.049 0.0094 0.1937

Table 3. Average densities for each component of the dynamic object calculated theoretically and reconstructed by simulation.
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Table 3. Average densities for each component of the dynamic object calculated theoretically and reconstructed by simulation.
Designed density Theoretical density Simulated density
Material (g/cm³) (g/cm³) (g/cm³)
B 2.370 2.370 2.354
B + Na 1.247, 0.460 1.247, 0.460 1.154, 0.501
Na 0.971 0.971 0.950
Be 1.848 1.848 1.823

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Feng Chen, Haibo Xu, Junhui Shi, Xinge Li, Na Zheng. A multi-material diagnosis method based on high-energy proton radiography[J]. Matter and Radiation at Extremes, 2023, 8(4): 046902

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Paper Information

Category: Radiation and Hydrodynamics

Received: Dec. 14, 2022

Accepted: Apr. 19, 2023

Published Online: Aug. 7, 2023

The Author Email: Haibo Xu (xu_haibo@iapcm.ac.cn)

DOI:10.1063/5.0138725

Topics

laser devices and laser physics

Lasers and Laser Optics

Laser physics

laser manufacturing

Instrumentation, Measurement and Metrology

Table 1. Aperture parameters of the collimators.

Table 1. Aperture parameters of the collimators.

Table 2. Parameters of different materials measured for a single-material object by a 20 GeV pRad system.

Table 2. Parameters of different materials measured for a single-material object by a 20 GeV pRad system.

Table 3. Average densities for each component of the dynamic object calculated theoretically and reconstructed by simulation.

Table 3. Average densities for each component of the dynamic object calculated theoretically and reconstructed by simulation.