{{Infobox particle accelerator | name = SAGA Light Source | image = | caption = | type = [[Synchrotron light source]] | beam = [[electrons]] | target = Light source | energy = 1.4 GeV | current = <!-- maximum beam current --> | brightness = <!-- maximum beam brightness --> | luminosity = <!-- maximum beam luminosity --> | length = <!-- physical length of accelerator for linear machines--> | radius = <!-- physical radius of the accelerator --> | circumference = {{convert|75.6|m|ft}} | location = [[Tosu, Saga]], [[Japan]] | coordinates = {{coord| 33.40305 | 130.51149|display=inline,title}} | institution = | dates = 2004–present | preceded = | succeeded = <!-- Direct successor of the machine, if any --> }} '''SAGA Light Source''' ('''SAGA-LS''') is a [[synchrotron radiation]] facility at the {{Nihongo|Kyushu Synchrotron Light Research Center|佐賀県立九州シンクロトロン光研究センター|Saga kenritsu Kyūshū shinkurotoron-kō kenkyū sentā}} located in the [[Tosu, Saga|Tosu]], [[Saga prefecture]], Japan. It is operated by the local government.<ref name="takeda2025">{{cite journal |last1=Takeda |first1=Harunobu |last2=Kaneyasu |first2=Tstsuo |last3=Takabayashi |first3=Yuichi |last4=Iwasaki |first4=Yoshitaka |year=2025 |title=Twenty years of operation of the SAGA Light Source |journal=[[Journal of Physics: Conference Series]] |volume=3010 |article-number=012013 |publisher=IOP Publishing| doi = 10.1088/1742-6596/3010/1/012013 |url=https://iopscience.iop.org/article/10.1088/1742-6596/3010/1/012013 |doi-access=free }}</ref>

==History== The design of the facility was finalized in March 2001 and construction started in fall 2001. Synchrotron commissioning started in 2004 and the facility was opened up to external users in 2006.<ref>{{cite web |author=<!-- not stated --> |title=About SAGA Light Source (SAGA-LS) |url=http://www.slc.saga-u.ac.jp/english/about/ |website=www.saga-u.ac.jp/ |publisher=[[Saga University]] |access-date=January 16, 2026}}</ref>

==Design and Research== SAGA-LS is a third-generation synchrotron source. It has a medium-sized ring with a circumference of 75.6&nbsp;m. The storage energy is 1.4&nbsp;GeV and beam current 300&nbsp;mA. As of 2025, there are eleven beam lines in operation, including two udulators and two superconducting wigglers.<ref name="takeda2025"/>

Following almost 20 years of service, large scale maintenance of the machine equipment is carried out 2023 to 2027.<ref name="takeda2025"/>

== See also == *[[List of synchrotron radiation facilities]] *[[Saga University]]

== References == {{Reflist}}

== External links== * [https://www.saga-ls.jp/ Official website (Japanese)] * [http://www.slc.saga-u.ac.jp/english/ English website]

{{Synchrotron radiation facilities}}

{{authority control}}

{{DEFAULTSORT:Saga Light Source}} [[Category:Synchrotron radiation facilities]] [[Category:Tosu, Saga]] [[Category:Buildings and structures in Saga Prefecture]] [[Category:Science and technology in Japan]]