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Investigation of sensitivity and threshold voltage shift of commercial MOSFETs in gamma irradiation 被引量:3
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作者 saleh ashrafi Baharak Eslami 《Nuclear Science and Techniques》 SCIE CAS CSCD 2016年第6期166-171,共6页
This article is about the absorbed-dose-dependent threshold voltage shift of the MOSFET transistors.Performance of the MOSFETs has been tested in different gate voltages.Sensitivity of the transistors for 662 ke V gam... This article is about the absorbed-dose-dependent threshold voltage shift of the MOSFET transistors.Performance of the MOSFETs has been tested in different gate voltages.Sensitivity of the transistors for 662 ke V gamma ray is studied in 1–5 Gy dose range.It was found that for transistors irradiated in biased mode,significant changes in the threshold voltage occurred,and the sensitivity to gamma rays increased with the bias voltage. 展开更多
关键词 阈值电压漂移 MOSFET Γ射线照射 敏感性 商业 吸收剂量 偏置电压 晶体管
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Photoneutron dose and flux determination of a typical LINAC by MCNP simulation
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作者 Aydin Ghalehasadi Eren Sahiner +3 位作者 saleh ashrafi Sasan Geranmayeh Hadi kasani Niyazi Meriç 《Radiation Detection Technology and Methods》 CSCD 2021年第4期627-632,共6页
Purpose High-energy electron linear accelerators(LINACs)have a wide use in radiotherapy.The photoneutron production in medical linear accelerators,when operating at energies greater than 10 MeV,is an important subject... Purpose High-energy electron linear accelerators(LINACs)have a wide use in radiotherapy.The photoneutron production in medical linear accelerators,when operating at energies greater than 10 MeV,is an important subject to consider in patient’s treatment procedures.In this work,we simulate a typical LINAC to calculate photoneutron dose and flux in radiotherapy room.Methods The latest version of MCNPX Monte Carlo code along with MCNP visual editor has been used to simulate the LINAC and its components.Photoneutron production has been successfully simulated by selecting appropriate physics card and parameters.Dose and flux of produced photoneutrons have been calculated by using mesh tally function.Results Production of photoneutrons in LINAC head and its components have been successfully simulated by using MCNPX code.MCNP visual editor has been used to track the particles.Photoneutron dose and flux have been calculated using mesh tally function,with good results of statistical tests.Conclusion The photoneutron production has been successfully simulated and benchmarked.The proposed simulation code is able to calculate photoneutron dose and flux.According to photoneutron production cross sections,the appropriate parameters have been selected to reduce the run-time of simulation code. 展开更多
关键词 LINAC PHOTONEUTRON DOSE FLUX MCNPX code
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