Two small-size package methods, thin stainless steel tube based package method and plating gold based package method for fiber Bragg grating(FBG) temperature sensors, are designed. The characteristics of the FBG tempe...Two small-size package methods, thin stainless steel tube based package method and plating gold based package method for fiber Bragg grating(FBG) temperature sensors, are designed. The characteristics of the FBG temperature sensors in the environment temperature between 203K and 243K are investigated. The wavelengths of the FBG temperature sensors as a function of the temperature are examined experimentally. The experiment results of the two different small-size package sensors in identical conditions are compared with each other. The transmission spectrum of the sensors is analyzed at the temperature of 273K and 213K. The temperature sensitive factors of the sensors are derived analytically and are verified by experiments. Linear fitting to the wavelength-temperature curve is carried out.展开更多
The energy loss, produced by shielding effect of steel cage outside the source tube, is quite considerable. With PENELOPE software package, MC results have been obtained based on the simulation of different source con...The energy loss, produced by shielding effect of steel cage outside the source tube, is quite considerable. With PENELOPE software package, MC results have been obtained based on the simulation of different source con- formations. The result illustrates that the naked source tubes can improve the utilization ratio of the cobalt facilities. It demonstrates the applied value of the naked source tube in engineering.展开更多
基金National Natural Science Foundation of China(50179029)
文摘Two small-size package methods, thin stainless steel tube based package method and plating gold based package method for fiber Bragg grating(FBG) temperature sensors, are designed. The characteristics of the FBG temperature sensors in the environment temperature between 203K and 243K are investigated. The wavelengths of the FBG temperature sensors as a function of the temperature are examined experimentally. The experiment results of the two different small-size package sensors in identical conditions are compared with each other. The transmission spectrum of the sensors is analyzed at the temperature of 273K and 213K. The temperature sensitive factors of the sensors are derived analytically and are verified by experiments. Linear fitting to the wavelength-temperature curve is carried out.
文摘The energy loss, produced by shielding effect of steel cage outside the source tube, is quite considerable. With PENELOPE software package, MC results have been obtained based on the simulation of different source con- formations. The result illustrates that the naked source tubes can improve the utilization ratio of the cobalt facilities. It demonstrates the applied value of the naked source tube in engineering.
