Published 2023
| Version v1
Miscellaneous
Residue orbit for LER injection bump caused by magnetic field difference between kickers
Creators
- 1. High Energy Accelerator Research Organization (KEK), Tsukuba, Ibaraki (Japan)
Description
The SuperKEKB accelerator has two groups of three kicker magnets in each ring to form closed kicker bump orbit with a horizontal phase of 180 degrees for injection. The difference in output current between LER kicker magnets has below 1%, however, the residue of LER injection bump orbit has been shown in the SuperKEKB operations. That residue implies that the kick angle which mean magnetic field strength is not equal between LER kicker magnets. In this paper, we consider this residue in the view of the internal magnetic field of LER ceramic duct. (author)
Availability note (English)
Available from http://pasj.jp/web_publish/pasj2023/proceedings/PDF/THOB/THOB12.pdfAbstract (Japanese)
電子・陽電子非対称衝突型円形加速器であるSuperKEKBは7GeVの電子リング(HER)と4GeVの陽電子リング(LER)から構成される.SuperKEKBではKicker電磁石3台を1組として両リングにそれぞれ2組が存在し,入射のために閉じた,つまり水平位相が180度の入射バンプ軌道を形成するように設計されている.しかしSuperKEKB運転時のBunch Oscillation Recorderによる軌道測定から,LERでは入射軌道の蹴り残しがあることがわかっている.LER Kicker電磁石では2組間で異なる形状のセラミックダクトが使われており,その形状差によってセラミックダクト内部の磁場波形が異なることが原因であると考えている.本発表ではセラミックダクト内部の磁場波形を計算した結果から,LER入射時におけるバンプ軌道の蹴り残しの原因について議論をする.また実際に測定されたセラミックダクト中の磁場波形も報告する.(著者)Additional details
Additional titles
- Original title (Japanese)
- Kicker電磁石によるLER入射バンプ軌道の蹴り残し
Identifiers
Publishing Information
- Imprint Title
- Proceedings of the 20th annual meeting of Particle Accelerator Society of Japan
- Imprint Pagination
- [1105 p.]
- Journal Page Range
- p. 222-224
Conference
- Title
- 20. annual meeting of Particle Accelerator Society of Japan
- Acronym
- PASJ2023
- Dates
- 29 Aug - 1 Sep 2023
- Place
- Funabashi, Chiba (Japan)
INIS
- Country of Publication
- Japan
- Country of Input or Organization
- Japan
- INIS RN
- 55092878
- Subject category
- S43: PARTICLE ACCELERATORS;
- Resource subtype / Literary indicator
- Conference, Non-conventional Literature
- Descriptors DEI
- BEAM DYNAMICS; BEAM INJECTION; EDDY CURRENTS; ELECTRIC CONDUCTIVITY; ELECTRON-POSITRON COLLISIONS; KEK PHOTON FACTORY; KICKER MAGNETS; MAGNETIC FIELDS; STORAGE RINGS; TRANSIENTS; WAVE FORMS
- Descriptors DEC
- COLLISIONS; CURRENTS; DYNAMICS; ELECTRIC CURRENTS; ELECTRICAL PROPERTIES; ELECTRON COLLISIONS; EQUIPMENT; MAGNETS; MECHANICS; PHYSICAL PROPERTIES; POSITRON COLLISIONS; RADIATION SOURCES; SYNCHROTRON RADIATION SOURCES
Optional Information
- Notes
- 8 refs., 5 figs. Imprint:#7B2C#20#56DE# #65E5##672C##52A0##901F##5668##5B66##4F1A##5E74##4F1A#