Optimization of a traveling wave superconducting rf cavity for upgrading the International Linear Collider
The standing wave TESLA niobium-based superconducting radio frequency structure is limited to an accelerating gradient of about 50 MV/m by the critical rf magnetic field. To break through this barrier, we explore the option of niobium-based traveling wave (TW) structures. Optimization of TW structu...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
| Published: |
American Physical Society
2022-02-01
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| Series: | Physical Review Accelerators and Beams |
| Online Access: | http://doi.org/10.1103/PhysRevAccelBeams.25.021001 |
| _version_ | 1818262465773830144 |
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| author | V. Shemelin H. Padamsee V. Yakovlev |
| author_facet | V. Shemelin H. Padamsee V. Yakovlev |
| author_sort | V. Shemelin |
| collection | DOAJ |
| description | The standing wave TESLA niobium-based superconducting radio frequency structure is limited to an accelerating gradient of about 50 MV/m by the critical rf magnetic field. To break through this barrier, we explore the option of niobium-based traveling wave (TW) structures. Optimization of TW structures was done considering experimentally known limiting electric and magnetic fields. It is shown that a TW structure can have an accelerating gradient above 70 MeV/m that is about 1.5 times higher than contemporary standing wave structures with the same critical magnetic field. The other benefit of TW structures shown is R/Q about 2 times higher than the TESLA structure that reduces the dynamic heat load by a factor of 2. A method is proposed how to make TW structures multipactor-free. Some design proposals are offered to facilitate fabrication. Further increase of the real-estate gradient (equivalent to 80 MV/m active gradient) is also possible by increasing the length of the accelerating structure because of higher group velocity and cell-to-cell coupling. Realization of this work opens paths to International Linear Collider energy upgrades beyond 1 to 3 TeV in competition with CLIC. The paper will discuss corresponding opportunities and challenges. |
| first_indexed | 2024-12-12T19:03:34Z |
| format | Article |
| id | doaj.art-fc37ed460f814266aee0e213b2c0ec35 |
| institution | Directory Open Access Journal |
| issn | 2469-9888 |
| language | English |
| last_indexed | 2024-12-12T19:03:34Z |
| publishDate | 2022-02-01 |
| publisher | American Physical Society |
| record_format | Article |
| series | Physical Review Accelerators and Beams |
| spelling | doaj.art-fc37ed460f814266aee0e213b2c0ec352022-12-22T00:15:01ZengAmerican Physical SocietyPhysical Review Accelerators and Beams2469-98882022-02-0125202100110.1103/PhysRevAccelBeams.25.021001Optimization of a traveling wave superconducting rf cavity for upgrading the International Linear ColliderV. ShemelinH. PadamseeV. YakovlevThe standing wave TESLA niobium-based superconducting radio frequency structure is limited to an accelerating gradient of about 50 MV/m by the critical rf magnetic field. To break through this barrier, we explore the option of niobium-based traveling wave (TW) structures. Optimization of TW structures was done considering experimentally known limiting electric and magnetic fields. It is shown that a TW structure can have an accelerating gradient above 70 MeV/m that is about 1.5 times higher than contemporary standing wave structures with the same critical magnetic field. The other benefit of TW structures shown is R/Q about 2 times higher than the TESLA structure that reduces the dynamic heat load by a factor of 2. A method is proposed how to make TW structures multipactor-free. Some design proposals are offered to facilitate fabrication. Further increase of the real-estate gradient (equivalent to 80 MV/m active gradient) is also possible by increasing the length of the accelerating structure because of higher group velocity and cell-to-cell coupling. Realization of this work opens paths to International Linear Collider energy upgrades beyond 1 to 3 TeV in competition with CLIC. The paper will discuss corresponding opportunities and challenges.http://doi.org/10.1103/PhysRevAccelBeams.25.021001 |
| spellingShingle | V. Shemelin H. Padamsee V. Yakovlev Optimization of a traveling wave superconducting rf cavity for upgrading the International Linear Collider Physical Review Accelerators and Beams |
| title | Optimization of a traveling wave superconducting rf cavity for upgrading the International Linear Collider |
| title_full | Optimization of a traveling wave superconducting rf cavity for upgrading the International Linear Collider |
| title_fullStr | Optimization of a traveling wave superconducting rf cavity for upgrading the International Linear Collider |
| title_full_unstemmed | Optimization of a traveling wave superconducting rf cavity for upgrading the International Linear Collider |
| title_short | Optimization of a traveling wave superconducting rf cavity for upgrading the International Linear Collider |
| title_sort | optimization of a traveling wave superconducting rf cavity for upgrading the international linear collider |
| url | http://doi.org/10.1103/PhysRevAccelBeams.25.021001 |
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