Evaluation of the Effect of Source Geometry on the Output of Miniature X-ray Tube for Electronic Brachytherapy through Simulation

Barati, B; Zabihzadeh, Mansour; Birgani, Mohammad Javad Tahmasebi; Chegini, Nahid; Fatahiasl, Jafar; Mirr, Iman

doi:10.31661/jbpe.v8i1mar.697

Cited by 2 publications

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References 30 publications

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“…In this study, hemispherical-conical, hemispherical, and truncated-conical miniature X-ray tubes [6,8] simulated with the Monte Carlo code MCNPX (2.6.0) were used (Figure 1). In these simulations, the densities of tungsten, beryllium, and water were 19.3, 1.84, and 0.998 g/cm 3 according to the Reference [7], and the density of the carbon layer was 1.35 gr/cm 3 according to the Reference [8,9].…”

Section: Simulation Of Miniature X-ray Tubes and The Mcnp Codementioning

confidence: 99%

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The Effect of Anode, Hot and Cold Cathode Structures Used in Miniature X-Ray Tubes on X-Ray Output Using Monte Carlo Simulation

Barati,

Kaydani,

Farhadi Birgani

et al. 2024

Recent Advances in Monte Carlo Methods

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This study aimed to investigate the use of carbon layers (cold cathode) as an alternative to tungsten metal (hot cathode) for electron production in miniature X-ray tubes in the field of electronic brachytherapy. The structural impact of these tubes on X-ray production was also analyzed. Using a Monte Carlo code, hemispherical-conical, hemispherical, and truncated-conical miniature X-ray tubes were simulated. Both cold and hot cathodes were utilized as electron sources to calculate the X-ray spectrum and dose in two directions. The results showed that the ratios of axial and transverse doses of spherical to cylindrical cold cathodes were respectively 5.4, 4.8, and 4.6, and 2.4, 2.2, and 1.9 in the hemispherical-conical, hemispherical, and truncated-conical miniature sources. In conclusion, the structure of the hemispherical-conical miniature X-ray tubes demonstrated better performance compared to the hemispherical and truncated-conical tubes. The different shapes of the cathode and anode in miniature X-ray tubes had a significant impact on the generation of output X-rays.

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Section: Simulation Of Miniature X-ray Tubes and The Mcnp Codementioning

confidence: 99%

“…In the mid-1950s, replacing cold cathodes with hot cathodes was suggested to overcome the disadvantages of hot cathodes [5]. Accordingly, the X-ray production using the field emission method was first reported in 1956 [6]. The necessary equations and explanations in this field are given in Appendix 2 [7].…”

Section: Introductionmentioning

confidence: 99%