Cross-wake force and correlated head-tail instability in beam-beam collisions with a large crossing angle
This paper discusses novel coherent beam-beam instability in collisions with a large crossing angle. The instability appears in the correlated head-tail motion of two colliding beams. A cross-wake force, which is localized at the collision point, is introduced to represent the head-tail correlation...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
American Physical Society
2018-03-01
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| Series: | Physical Review Accelerators and Beams |
| Online Access: | http://doi.org/10.1103/PhysRevAccelBeams.21.031002 |
| _version_ | 1811229351208812544 |
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| author | Nami Kuroo Kazuhito Ohmi Katsunobu Oide Demin Zhou Frank Zimmermann |
| author_facet | Nami Kuroo Kazuhito Ohmi Katsunobu Oide Demin Zhou Frank Zimmermann |
| author_sort | Nami Kuroo |
| collection | DOAJ |
| description | This paper discusses novel coherent beam-beam instability in collisions with a large crossing angle. The instability appears in the correlated head-tail motion of two colliding beams. A cross-wake force, which is localized at the collision point, is introduced to represent the head-tail correlation between colliding beams. A mode-coupling theory based on this localized cross-wake force enables us to explain the correlated heal-tail instability. The use of a collision scheme with a large crossing angle is becoming popular in the design of electron–positron colliders. An example thereof is the SuperKEKB project, in which a collision with a large crossing angle is performed to boost the luminosity to 0.8×10^{36} cm^{-2} s^{-1}. Future circular colliders will also be designed with a large crossing angle. Strong-strong simulations, which have shown the first coherent head-tail instability, can limit the performance of proposed future colliders. The mechanism whereby this instability occurs is mode coupling due to the cross-wake force. This instability may affect all collider designs based on the crab waist scheme. |
| first_indexed | 2024-04-12T10:13:33Z |
| format | Article |
| id | doaj.art-648a0b06cafd491c8e568ee60e37f01b |
| institution | Directory Open Access Journal |
| issn | 2469-9888 |
| language | English |
| last_indexed | 2024-04-12T10:13:33Z |
| publishDate | 2018-03-01 |
| publisher | American Physical Society |
| record_format | Article |
| series | Physical Review Accelerators and Beams |
| spelling | doaj.art-648a0b06cafd491c8e568ee60e37f01b2022-12-22T03:37:15ZengAmerican Physical SocietyPhysical Review Accelerators and Beams2469-98882018-03-0121303100210.1103/PhysRevAccelBeams.21.031002Cross-wake force and correlated head-tail instability in beam-beam collisions with a large crossing angleNami KurooKazuhito OhmiKatsunobu OideDemin ZhouFrank ZimmermannThis paper discusses novel coherent beam-beam instability in collisions with a large crossing angle. The instability appears in the correlated head-tail motion of two colliding beams. A cross-wake force, which is localized at the collision point, is introduced to represent the head-tail correlation between colliding beams. A mode-coupling theory based on this localized cross-wake force enables us to explain the correlated heal-tail instability. The use of a collision scheme with a large crossing angle is becoming popular in the design of electron–positron colliders. An example thereof is the SuperKEKB project, in which a collision with a large crossing angle is performed to boost the luminosity to 0.8×10^{36} cm^{-2} s^{-1}. Future circular colliders will also be designed with a large crossing angle. Strong-strong simulations, which have shown the first coherent head-tail instability, can limit the performance of proposed future colliders. The mechanism whereby this instability occurs is mode coupling due to the cross-wake force. This instability may affect all collider designs based on the crab waist scheme.http://doi.org/10.1103/PhysRevAccelBeams.21.031002 |
| spellingShingle | Nami Kuroo Kazuhito Ohmi Katsunobu Oide Demin Zhou Frank Zimmermann Cross-wake force and correlated head-tail instability in beam-beam collisions with a large crossing angle Physical Review Accelerators and Beams |
| title | Cross-wake force and correlated head-tail instability in beam-beam collisions with a large crossing angle |
| title_full | Cross-wake force and correlated head-tail instability in beam-beam collisions with a large crossing angle |
| title_fullStr | Cross-wake force and correlated head-tail instability in beam-beam collisions with a large crossing angle |
| title_full_unstemmed | Cross-wake force and correlated head-tail instability in beam-beam collisions with a large crossing angle |
| title_short | Cross-wake force and correlated head-tail instability in beam-beam collisions with a large crossing angle |
| title_sort | cross wake force and correlated head tail instability in beam beam collisions with a large crossing angle |
| url | http://doi.org/10.1103/PhysRevAccelBeams.21.031002 |
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