Intrabeam scattering analysis of measurements at KEK’s Accelerator Test Facility damping ring
We derive a simple relation for estimating the relative emittance growth in x and y due to intrabeam scattering (IBS) in electron storage rings. We show that IBS calculations for the Accelerator Test Facility (ATF) damping ring, when using the formalism of Bjorken-Mtingwa, a modified formalism of Pi...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
American Physical Society
2002-08-01
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| Series: | Physical Review Special Topics. Accelerators and Beams |
| Online Access: | http://doi.org/10.1103/PhysRevSTAB.5.084403 |
| _version_ | 1811197280458375168 |
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| author | K. L. F. Bane H. Hayano K. Kubo T. Naito T. Okugi J. Urakawa |
| author_facet | K. L. F. Bane H. Hayano K. Kubo T. Naito T. Okugi J. Urakawa |
| author_sort | K. L. F. Bane |
| collection | DOAJ |
| description | We derive a simple relation for estimating the relative emittance growth in x and y due to intrabeam scattering (IBS) in electron storage rings. We show that IBS calculations for the Accelerator Test Facility (ATF) damping ring, when using the formalism of Bjorken-Mtingwa, a modified formalism of Piwinski (where η^{2}/β has been replaced by H), or a simple high-energy approximate formula all give results that agree well. Comparing theory, including the effect of potential well bunch lengthening, with a complete set of ATF steady-state beam size versus current measurements we find reasonably good agreement for energy spread and horizontal emittance. The measured vertical emittance, however, is larger than theory in both offset (zero current emittance) and slope (emittance change with current). Almost all the offset error can be accounted for by considering the expected projected vertical emittance due to machine errors rather than the real emittance. This result is consistent with the assumed Coulomb log factor being close to the correct one. The slope error indicates measurement error and/or additional current-dependent physics at the ATF. |
| first_indexed | 2024-04-12T01:12:32Z |
| format | Article |
| id | doaj.art-c8ded610ef9d416fb9d363e19c245f26 |
| institution | Directory Open Access Journal |
| issn | 1098-4402 |
| language | English |
| last_indexed | 2024-04-12T01:12:32Z |
| publishDate | 2002-08-01 |
| publisher | American Physical Society |
| record_format | Article |
| series | Physical Review Special Topics. Accelerators and Beams |
| spelling | doaj.art-c8ded610ef9d416fb9d363e19c245f262022-12-22T03:54:04ZengAmerican Physical SocietyPhysical Review Special Topics. Accelerators and Beams1098-44022002-08-015808440310.1103/PhysRevSTAB.5.084403Intrabeam scattering analysis of measurements at KEK’s Accelerator Test Facility damping ringK. L. F. BaneH. HayanoK. KuboT. NaitoT. OkugiJ. UrakawaWe derive a simple relation for estimating the relative emittance growth in x and y due to intrabeam scattering (IBS) in electron storage rings. We show that IBS calculations for the Accelerator Test Facility (ATF) damping ring, when using the formalism of Bjorken-Mtingwa, a modified formalism of Piwinski (where η^{2}/β has been replaced by H), or a simple high-energy approximate formula all give results that agree well. Comparing theory, including the effect of potential well bunch lengthening, with a complete set of ATF steady-state beam size versus current measurements we find reasonably good agreement for energy spread and horizontal emittance. The measured vertical emittance, however, is larger than theory in both offset (zero current emittance) and slope (emittance change with current). Almost all the offset error can be accounted for by considering the expected projected vertical emittance due to machine errors rather than the real emittance. This result is consistent with the assumed Coulomb log factor being close to the correct one. The slope error indicates measurement error and/or additional current-dependent physics at the ATF.http://doi.org/10.1103/PhysRevSTAB.5.084403 |
| spellingShingle | K. L. F. Bane H. Hayano K. Kubo T. Naito T. Okugi J. Urakawa Intrabeam scattering analysis of measurements at KEK’s Accelerator Test Facility damping ring Physical Review Special Topics. Accelerators and Beams |
| title | Intrabeam scattering analysis of measurements at KEK’s Accelerator Test Facility damping ring |
| title_full | Intrabeam scattering analysis of measurements at KEK’s Accelerator Test Facility damping ring |
| title_fullStr | Intrabeam scattering analysis of measurements at KEK’s Accelerator Test Facility damping ring |
| title_full_unstemmed | Intrabeam scattering analysis of measurements at KEK’s Accelerator Test Facility damping ring |
| title_short | Intrabeam scattering analysis of measurements at KEK’s Accelerator Test Facility damping ring |
| title_sort | intrabeam scattering analysis of measurements at kek s accelerator test facility damping ring |
| url | http://doi.org/10.1103/PhysRevSTAB.5.084403 |
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