Effect of pulse irradiation on the evolution of damage structure

• 義家, 敏正

  Institute for Integrated Radiation and Nuclear Science, Kyoto University

• 木野村, 淳

  Institute for Integrated Radiation and Nuclear Science, Kyoto University

抄録

Charged particle beams from accelerators driven by radiofrequency or with beam scanners possess time structures (i.e., pulse beam operations). However, it is not clear whether the irradiation effects of these pulse beam operations are the same as those of continuous beams, although the average damage rate is the same in both cases. In this study, the difference between continuous beams and pulse beams, and the effect of the repetition frequency and pulse duration on the defect accumulation are evaluated by the rate equation analysis for Al and Fe. The growth rate of interstitial type dislocation loops in Al is simulated with fixed duty ratios (constant pulse duration over the irradiation period) at 453 K. The effect of pulse duration on a constant period of 1 s is simulated in Fe, changing the pulse duration from 1 to 10⁻⁶ s, while the damage (dpa) caused by one pulse remains the same. The results are analyzed and the effects of pulse duration and repetition rate on the damage structure evolution are demonstrated in relation to materials parameters.

収録刊行物

• Nuclear Inst. and Methods in Physics Research

  Nuclear Inst. and Methods in Physics Research 479 51-54, 2020-09

  Elsevier BV

キーワード

• Charged particle irradiation
• Pulse beam operation
• Interstitial type dislocation loops
• Rate equation

詳細情報

• CRID: 1050848249781237760
• NII論文ID: 120006870326
• ISSN: 0168583X
• HANDLE: 2433/252780
• 本文言語コード: en
• 資料種別: journal article
• データソース種別:
  • IRDB
  • CiNii Articles