Positive pulsed discharge plasma is generated above a test liquid containing NaCl in Ar atmosphere, and H ⁺ distribution and a temperature variation in the liquid are, respectively, visualized by colorimetric methods using methyl red (MR) and microencapsulated thermotropic liquid crystals (MTLCs). The discharges generated above the liquid containing MR and MTLCs have almost the same characteristics in the waveforms of discharge voltage and current, and the appearance of discharges. The generation of H ⁺ and the temperature increase in the liquid are induced below the discharge area, and H ⁺ distribution and temperature-increased area expand similarly, by the plasma exposure. The spatiotemporal measurement of temperature distribution in the liquid is also observed with MTLCs using a sheet laser. It is found that temperature increase is measured just below the extremity of the discharge and distributes in a torus form and that no temperature increase occurs below the middle of the discharge area. Since good similarity is observed between the H ⁺ distribution and the temperature increase in the test liquid, H ⁺ distribution probably expands in a concentric configuration from the generation area with the plasma exposure time.

中文翻译：

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可视化时空温度变化以通过脉冲放电等离子体暴露估算H ⁺ _aq分布

在Ar气氛中，在包含NaCl的测试液体上方生成正脉冲放电等离子体，并使用比色法使用甲基红（MR）和微囊热致液晶（MTLC）分别显示液体中的H ⁺分布和温度变化。在含有MR和MTLC的液体上方产生的放电在放电电压和电流的波形以及放电的外观方面具有几乎相同的特性。H ⁺的产生 和液体中的温度升高是在排放区域以下引起的，而H ⁺通过等离子体暴露，分布和温度增加的区域类似地扩展。液体温度分布的时空测量也可以通过使用片状激光器的MTLC进行观察。发现在出口的正下方测量了温度升高并且以圆环形式分布并且在排放区域的中部以下没有温度升高发生。由于观察到H ⁺分布和测试液体的温度升高之间具有良好的相似性 ，因此H ⁺分布可能随同等离子体暴露时间而从生成区域以同心构型扩展。