TY - JOUR

T1 - Conceptual design report of the Super Tau-Charm Facility: the accelerator

AU - Super Tau-Charm Facility (STCF)

AU - Богомягков, Антон Викторович

AU - Кооп, Иван Александрович

AU - Кравченко, Евгений Анатольевич

AU - Левичев, Евгений Борисович

AU - Роговский, Юрий Анатольевич

AU - Skamarokha, Mikhail A.

AU - Тельнов, Валерий Иванович

AU - Тихонов, Юрий Анатольевич

N1 - Conceptual design report of the Super Tau-Charm Facility: the accelerator / X. C. Ai, L. P. An, Sh. Zh. An [et al.] // Nuclear Science and Techniques. – 2025. – Vol. 36. - No. 12. – P. 242. – DOI 10.1007/s41365-025-01833-x. – EDN DOLCRS. This work is jointly supported by the National Key Research and Development Program of China (No. 2022YFA1602200), the National Natural Science Foundation of China (Nos. 12341501 and 12405174), and the Hefei Comprehensive National Science Center for the strong support on the STCF key technology research project.

PY - 2025/12/4

Y1 - 2025/12/4

N2 - Electron–positron colliders operating in the GeV center-of-mass range, or tau-charm energy region, have been proved to enable competitive frontier research due to several unique features. With the progress of high-energy physics in the last two decades, a new-generation Tau-Charm factory, called the Super Tau-Charm Facility (STCF), has been actively promoted by the particle physics community in China. STCF has the potential to address fundamental questions such as the essence of color confinement and the matter–antimatter asymmetry within the next decades. The main design goals of the STCF are a center-of-mass energy ranging from 2 to 7 GeV and a luminosity surpassing 5 × 1034 cm−2 s−1 that is optimized at a center-of-mass energy of 4 GeV, which is approximately 50 times that of the currently operating Tau-Charm factory—BEPCII. The STCF accelerator has two main parts: a double-ring collider with a crab-waist collision scheme and an injector that provides top-up injections for both electron and positron beams. As a typical third-generation electron–positron circular collider, the STCF accelerator faces many challenges in both accelerator physics and technology. In this paper, the conceptual design of the STCF accelerator complex is presented, including the ongoing efforts and plans for technological research and development, as well as the required infrastructure. The STCF project aims to secure support from the Chinese central government for its construction during the 15th Five-Year Plan (2026–2030).

AB - Electron–positron colliders operating in the GeV center-of-mass range, or tau-charm energy region, have been proved to enable competitive frontier research due to several unique features. With the progress of high-energy physics in the last two decades, a new-generation Tau-Charm factory, called the Super Tau-Charm Facility (STCF), has been actively promoted by the particle physics community in China. STCF has the potential to address fundamental questions such as the essence of color confinement and the matter–antimatter asymmetry within the next decades. The main design goals of the STCF are a center-of-mass energy ranging from 2 to 7 GeV and a luminosity surpassing 5 × 1034 cm−2 s−1 that is optimized at a center-of-mass energy of 4 GeV, which is approximately 50 times that of the currently operating Tau-Charm factory—BEPCII. The STCF accelerator has two main parts: a double-ring collider with a crab-waist collision scheme and an injector that provides top-up injections for both electron and positron beams. As a typical third-generation electron–positron circular collider, the STCF accelerator faces many challenges in both accelerator physics and technology. In this paper, the conceptual design of the STCF accelerator complex is presented, including the ongoing efforts and plans for technological research and development, as well as the required infrastructure. The STCF project aims to secure support from the Chinese central government for its construction during the 15th Five-Year Plan (2026–2030).

KW - Third-generation electron-positron collider

KW - Super high-luminosity

KW - Tau-charm physics

KW - Crab-waist collision scheme

KW - Touschek lifetime

UR - https://www.scopus.com/pages/publications/105023953423

UR - https://elibrary.ru/item.asp?id=88352350

U2 - 10.1007/s41365-025-01833-x

DO - 10.1007/s41365-025-01833-x

M3 - Article

VL - 36

JO - Nuclear Science and Techniques

JF - Nuclear Science and Techniques

SN - 1001-8042

IS - 12

M1 - 242

ER -