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Saito Lab
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An experimental physics lab that uses high-performance digital measuring instruments to study audio equipment and positronium.
AboutAbout the lab
Experimental physics that measures fluctuations
Saito Lab conducts physics experiments using high-performance digital measuring instruments and data analysis methods.
The lab studies three subjects: digital audio equipment, reference signal sources, and positronium.
For audio equipment and reference signal sources, the lab uses measurement techniques it developed in-house to measure timing deviations and phase noise.
For positronium, the lab conducts experiments to measure how it interacts with gas molecules.
Key terms
- Sampling jitter
- The deviation from a fixed period in the timing at which digital audio is converted into an analog electrical signal
- Phase noise
- Slight fluctuations in the timing of the waves of a signal produced by an oscillator. It affects the accuracy of time synchronization and wireless communication
- Positronium
- A very short-lived atom formed when one electron binds with one positron, its antiparticle
NewsLab news
View More ↗ResearchResearch themes
Making full use of high-performance digital measuring instruments and data analysis methods, the lab conducts physics experiments on audio equipment, reference signal sources, and positronium. For audio equipment and reference signal sources, it uses measurement techniques developed in-house.
*Illustrative imageDigital Audio Equipment
The lab developed a method to measure, precisely and easily, the timing deviation (sampling jitter) with which devices such as CD players convert audio into electrical signals. Using this measurement technique, the lab aims to improve the performance of digital audio equipment.
*Illustrative imagePhase Noise of Reference Signal Sources
The lab applies the measurement technique developed for audio equipment to signal sources with higher frequencies. It has succeeded in measuring the phase noise of a crystal oscillator in the time domain using a high-speed digital oscilloscope.
*Illustrative imagePositronium
Using the spin conversion reaction with xenon gas, the lab investigates the interaction between positronium and gas molecules. By mixing other gases, such as helium, into the xenon, it aims to precisely measure the parameters of this interaction.
MembersFaculty
The members of Saito Lab consist of faculty members and graduate students.
- ProfessorHaruo SaitoPublications ↗
- Assistant ProfessorMakoto TakeuchiPublications ↗
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Report an errorAbout the images
The top and research theme images are illustrative and were not taken at the lab. They are cropped from Wikimedia Commons images. Cropped CC BY-SA images are provided under the same CC BY-SA license as the original (version shown on each line).
- Top image: “Digital oscilloscope in use” Radarvector / CC BY-SA 4.0 (cropped)
- Digital Audio Equipment: “DAC Philips TDA1541A-S1” Cjp24 / CC BY-SA 4.0 (cropped)
- Phase Noise of Reference Signal Sources: “RAKON STP2734B LF OCXO 10MHZ” Mister rf / CC BY-SA 4.0 (cropped)
- Positronium: “Inside Antiproton generator, Antimatter Factory, CERN” Mramoeba / CC0 (cropped)
- Related lab (諏訪研究室): “Crab Nebula” NASA, ESA, J. Hester and A. Loll (Arizona State University) / Public domain (cropped)
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- Related lab (土畑研究室): “Pristomyrmex punctatus ( )” harum.koh from Kobe city, Japan / CC BY-SA 2.0 (cropped)
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