Analytical relationships between elliptic accelerating cavity shape and fields
Here we describe some relationships between cavity shape and fields on and near its surface that can be used for better understanding of the surface field properties. The problem of accelerating cavity optimization lies in the search of the shape with minimal peak magnetic or electric field for a gi...
| Main Authors: | , |
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| Format: | Article |
| Language: | English |
| Published: |
American Physical Society
2014-10-01
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| Series: | Physical Review Special Topics. Accelerators and Beams |
| Online Access: | http://doi.org/10.1103/PhysRevSTAB.17.102001 |
| _version_ | 1818277321544564736 |
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| author | Valery Shemelin Georg Hoffstaetter |
| author_facet | Valery Shemelin Georg Hoffstaetter |
| author_sort | Valery Shemelin |
| collection | DOAJ |
| description | Here we describe some relationships between cavity shape and fields on and near its surface that can be used for better understanding of the surface field properties. The problem of accelerating cavity optimization lies in the search of the shape with minimal peak magnetic or electric field for a given acceleration rate. This problem became especially important due to widespread use of superconducting cavities where the maximal magnetic field appeared to have a hard limit. The peak magnetic field can be lowered if one can increase the peak electric field but the electric field is also limited because of field emission. The problem of minimal losses in a cavity is very close to the problem of minimal peak magnetic field, though it is not the same, it relates to the lowest average field for a given acceleration rate. The field configuration on the cavity surface is also responsible for the phenomenon of multipactor. Cavities with these properties—minimal peak fields, minimal losses, and absence of multipactor—are found within the set of elliptic cavities. Further improvement of these properties is possible if we step out of the limits of elliptic shapes. |
| first_indexed | 2024-12-12T22:59:41Z |
| format | Article |
| id | doaj.art-cd30fa2d1a854aeeb5563eb7958a7eb8 |
| institution | Directory Open Access Journal |
| issn | 1098-4402 |
| language | English |
| last_indexed | 2024-12-12T22:59:41Z |
| publishDate | 2014-10-01 |
| publisher | American Physical Society |
| record_format | Article |
| series | Physical Review Special Topics. Accelerators and Beams |
| spelling | doaj.art-cd30fa2d1a854aeeb5563eb7958a7eb82022-12-22T00:08:52ZengAmerican Physical SocietyPhysical Review Special Topics. Accelerators and Beams1098-44022014-10-01171010200110.1103/PhysRevSTAB.17.102001Analytical relationships between elliptic accelerating cavity shape and fieldsValery ShemelinGeorg HoffstaetterHere we describe some relationships between cavity shape and fields on and near its surface that can be used for better understanding of the surface field properties. The problem of accelerating cavity optimization lies in the search of the shape with minimal peak magnetic or electric field for a given acceleration rate. This problem became especially important due to widespread use of superconducting cavities where the maximal magnetic field appeared to have a hard limit. The peak magnetic field can be lowered if one can increase the peak electric field but the electric field is also limited because of field emission. The problem of minimal losses in a cavity is very close to the problem of minimal peak magnetic field, though it is not the same, it relates to the lowest average field for a given acceleration rate. The field configuration on the cavity surface is also responsible for the phenomenon of multipactor. Cavities with these properties—minimal peak fields, minimal losses, and absence of multipactor—are found within the set of elliptic cavities. Further improvement of these properties is possible if we step out of the limits of elliptic shapes.http://doi.org/10.1103/PhysRevSTAB.17.102001 |
| spellingShingle | Valery Shemelin Georg Hoffstaetter Analytical relationships between elliptic accelerating cavity shape and fields Physical Review Special Topics. Accelerators and Beams |
| title | Analytical relationships between elliptic accelerating cavity shape and fields |
| title_full | Analytical relationships between elliptic accelerating cavity shape and fields |
| title_fullStr | Analytical relationships between elliptic accelerating cavity shape and fields |
| title_full_unstemmed | Analytical relationships between elliptic accelerating cavity shape and fields |
| title_short | Analytical relationships between elliptic accelerating cavity shape and fields |
| title_sort | analytical relationships between elliptic accelerating cavity shape and fields |
| url | http://doi.org/10.1103/PhysRevSTAB.17.102001 |
| work_keys_str_mv | AT valeryshemelin analyticalrelationshipsbetweenellipticacceleratingcavityshapeandfields AT georghoffstaetter analyticalrelationshipsbetweenellipticacceleratingcavityshapeandfields |