LAB LOGA page on LabLog, a review site (not the lab's official page)
Koseki Lab
Machine-translated · View original
An accelerator physics lab working to make J-PARC's proton beam even more intense.
AboutAbout the lab
Making one of the world's most powerful proton beams even more intense.
The Koseki Lab studies high-energy particle accelerators.
At J-PARC (Japan Proton Accelerator Research Complex), the high-intensity proton accelerator facility on the Tokai Campus, the lab conducts research to increase the intensity of the proton beam.
The appeal of this research lies in figuring out how to combat the electromagnetic forces that the particles in the beam exert on one another (space charge effects).
At the Tsukuba Campus, members can also take part in development research related to the SuperKEKB collider and the International Linear Collider (ILC).
Key terms
- Synchrotron
- An accelerator that speeds up particles by sending them around a circular orbit many times
- Space charge effect
- The influence that charged particles within a beam exert on one another through electromagnetic forces
- Luminosity
- A measure of a collider's performance, indicating how many collisions occur between particles
ResearchResearch themes
The lab studies high-energy particle accelerators. Its work includes beam dynamics research and hardware R&D at J-PARC, the high-intensity proton accelerator, and at SuperKEKB, the electron-positron collider, as well as development research related to the accelerator for the International Linear Collider (ILC).
*Illustrative imageIncreasing the Beam Intensity of the J-PARC Main Ring
The proton beam of the J-PARC Main Ring synchrotron (MR) is used for particle and nuclear physics research at the T2K experiment and the Hadron Experimental Facility. To raise the beam intensity, which determines the precision of the experiments, the lab studies how to counter space charge effects.
*Illustrative imageDevelopment Research for SuperKEKB and the ILC
At the Tsukuba Campus, members can take part in development research related to SuperKEKB, a collider that continues to set new world records for luminosity, and the International Linear Collider (ILC).
MembersFaculty
The members of the Koseki Lab consist of faculty and doctoral students.As of 2026
- ProfessorTadashi Koseki
VoicesStudent voices
Compiled from answers by students who were in the lab. Ratings and reviews reflect individual students' experiences, not the lab's official views.
Students who take part in an interview may receive a thank-you gift worth ¥1,000, regardless of what they say.
Who is this lab for?
What's great about this lab?
What did you learn after joining?
What's the vibe, and what is the professor like?
Where do graduates go?
The information on this page is compiled by the LabLog team from the lab's public information and interviews. For corrections or removal requests, please contact LabLog, not the lab.
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: “J-PARC Main Ring P7311328” Kestrel / CC BY-SA 4.0 (cropped)
- Increasing the Beam Intensity of the J-PARC Main Ring: “Superconducting Magnets J-PARC” Patrick Dep / CC BY-SA 2.0 (cropped)
- Development Research for SuperKEKB and the ILC: “Superkekb arc” Eto shorcy / CC BY-SA 4.0 (cropped)
About LabLog
LabLog is a lab review app for students only. Student members at each university interview students in labs and publish what they say. Student voices can only be read by students who sign up with a university email address. Operated by bestiee Inc.
Learn more about LabLog ↗Search engines and AI may reference the basic lab info and rating summaries on this page and the description of LabLog. Student voices are for student members only. Automated collection by programs (scraping, or input to or training of AI) is prohibited under Article 8 of the Terms of Service. If you need data for research or analysis, please contact us.