RF design of a transverse mode cavity for kaon separation

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Two deflecting mode RF systems can be used to separate secondary kaons from a momentum selected particle beam, primarily consisting of a mix of protons, pions and kaons, by a time of flight method. The principles of this methods and the choices of the parameters are explained. It is planned to use a 3.9 GHz 13-cell super-conducting cavity operated in a {pi}-dipole-mode. First, the passband structure of different cavity shapes, which mainly differ by the cell-to-cell coupling and the resulting dispersion slope, is investigated. The main concern is the frequency difference between the {pi}-mode and the next lowest mode in ... continued below

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1598 Kilobytes pages

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Wanzenberg, Michael McAshan and Rainer May 15, 2001.

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Description

Two deflecting mode RF systems can be used to separate secondary kaons from a momentum selected particle beam, primarily consisting of a mix of protons, pions and kaons, by a time of flight method. The principles of this methods and the choices of the parameters are explained. It is planned to use a 3.9 GHz 13-cell super-conducting cavity operated in a {pi}-dipole-mode. First, the passband structure of different cavity shapes, which mainly differ by the cell-to-cell coupling and the resulting dispersion slope, is investigated. The main concern is the frequency difference between the {pi}-mode and the next lowest mode in the same passband and the implications on the tuneability of the cavity. For three shapes the possible end-cell designs for a 7-cell and 13-cell cavity are presented. All numerical field calculations are performed by the MAFIA code. An equivalent circuit model, based on a two chain model, is applied to a 7-cell cavity. It is demonstrated that the dispersion diagram obtained by MAFIA calculations can be very well approximated by this equivalent circuit.

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1598 Kilobytes pages

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  • Other Information: PBD: 15 May 2001

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  • Report No.: FERMILAB-TM-2144
  • Grant Number: AC02-76CH03000
  • Office of Scientific & Technical Information Report Number: 780614
  • Archival Resource Key: ark:/67531/metadc715821

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Office of Scientific & Technical Information Technical Reports

Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

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  • May 15, 2001

Added to The UNT Digital Library

  • Sept. 29, 2015, 5:31 a.m.

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  • April 1, 2016, 4:50 p.m.

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Wanzenberg, Michael McAshan and Rainer. RF design of a transverse mode cavity for kaon separation, report, May 15, 2001; Batavia, Illinois. (digital.library.unt.edu/ark:/67531/metadc715821/: accessed June 18, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.