A new Tevatron Collider working point near the integer

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It is well established that in hadron colliders the beam-beam interaction is more harmful in the presence of machine resonances of the form m{nu}{sub x} + n{nu}{sub y} = p, where {vert bar}m{vert bar} + {vert bar}n{vert bar} is the order of the resonance. Since the closest a resonance line can be to the integer stopband is 1/order, the closer the working point is to the integer, the fewer lower order resonances there are to enhance the beam-beam effects. A shift of the working point of the Tevatron from 19.4 to values near 19 and 20 has been studied. Problems ... continued below

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Pages: (3 p)

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Johnson, R.P. & Zhang, P. December 1, 1989.

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Description

It is well established that in hadron colliders the beam-beam interaction is more harmful in the presence of machine resonances of the form m{nu}{sub x} + n{nu}{sub y} = p, where {vert bar}m{vert bar} + {vert bar}n{vert bar} is the order of the resonance. Since the closest a resonance line can be to the integer stopband is 1/order, the closer the working point is to the integer, the fewer lower order resonances there are to enhance the beam-beam effects. A shift of the working point of the Tevatron from 19.4 to values near 19 and 20 has been studied. Problems with closed orbit control, dispersion matching, and matched low {beta} insertions were considered. An excellent solution for the B0 insertion was found which has an improved {beta}*. A new injection optics allows a transition to the low {beta} optics which is much easier than the one now used. Results from the first machine studies demonstrate the ability to control the orbit with tunes of 19.03 horizontal and 20.03 vertical. Further studies require the activation of additional quadrupole compensation circuits. 4 refs. , 2 figs.

Physical Description

Pages: (3 p)

Notes

NTIS, PC A02/MF A01; OSTI; INIS

Source

  • 13. particle accelerator conference, Chicago, IL (USA), 20-23 Mar 1989

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  • Other: DE90006393
  • Report No.: FNAL-TM-1638
  • Report No.: CONF-890335--273
  • Grant Number: AC02-76CH03000
  • Grant Number: FG05-87ER40374
  • Office of Scientific & Technical Information Report Number: 5034612
  • Archival Resource Key: ark:/67531/metadc1052375

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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.

Office of Scientific and Technical Information (OSTI) is the Department of Energy (DOE) office that collects, preserves, and disseminates DOE-sponsored research and development (R&D) results that are the outcomes of R&D projects or other funded activities at DOE labs and facilities nationwide and grantees at universities and other institutions.

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  • December 1, 1989

Added to The UNT Digital Library

  • Jan. 22, 2018, 7:23 a.m.

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  • Feb. 1, 2018, 8:31 p.m.

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Johnson, R.P. & Zhang, P. A new Tevatron Collider working point near the integer, article, December 1, 1989; Batavia, Illinois. (digital.library.unt.edu/ark:/67531/metadc1052375/: accessed July 17, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.