[O-04] Poster presentations by senior high school students

[O04-P19] Spectroscopy of plasma generated in a microwave using a newly developed simple spectrometer with high resolution

*Ayaka Akase¹, *Kento Takase¹, *Reiji Iwamoto¹, *Keishi Okumi¹, *Mayu Naito¹, *Hiromu Fujimoto¹, *Yamato Yasuhara¹, *Natsuki Yamamoto¹ (1.Hyogo Prefectural Himeji Higashi Senior High School Science Club ( Plasma team ))

Keywords:plasma in a microwave oven, developed of the simple spectroscope, exciting of the sodium

We conducted the following basic research on plasma. When a mechanical pencil’s core is heated in a microwave oven, yellow plasma is emitted. High resolution spectrometers are expensive and we cannot buy them. In order to confirm the identity of this light, we developed the simple spectroscope that has the resolution to split the D line of a sodium lamp into two lines, and that can obtain a stable and clear image with a digital camera. We used this spectrometer to split the plasma light emitted from the mechanical pencil’s core in a microwave oven. As a result, the light was found to be a strong emission line of sodium. The plasma is generated by exciting the sodium of the ceramic table by the mechanical pencil's core acting as an antenna.