"J-PARC Outreach Lecture" held in December 2025
◆◇◆Muramatsu Elementary School, Tokai Village (Tuesday, December 2, 2025) ◆◇◆
Dr. KAMIYA Junichiro from the Accelerator Division and Mr. YASU Toshiyuki from the Tokai Village Board of Education delivered a science class titled "What Is a Vacuum?" for 5th grade students.
The class began with experiments that helped students understand invisible air, such as floating a ping-pong ball above the nozzle of a hair dryer. They then carried out experiments to observe what happens to balloons, hot water, carbonated water, and marshmallows when they are in vacuum. The instructors also guided the lesson by asking questions such as "Why does a loud burglar alarm become silent when there is no air?"
At the end of the lesson, the students counted down as a ping-pong ball was launched into an aluminum can using a vacuum cannon.
The instructors also explained that at J-PARC, maintaining a vacuum is extremely important because air molecules can interfere with the proton beam and reduce its intensity.
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