LEIROTHER IONS

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LEIR-OTHER IONS

• Michel CHANEL

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Foreseen operations

• Ions in LEIR
• Protons-Ions
• A-A
• A1-A2

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IONS REQUESTS(exhaustive)
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LIMITATIONS
Space charge
PS to SPS when stripping

• Conséquences
• avoid stripping between PS and SPS when possible,
• Highest charge state as soon as possible in the
  chain(cooling time decreased but frev increased
  at extraction),
• Maximum DQ in the low energy machine where
  special measures can be taken (shaping density,
  double harmonic RF)
• Re-enforce the choice of the max transfer Br from
  LEIR to PS and PS to SPS
• Re-enforce the choice of the cavity type allowing
  large frequency swing

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LIMITATIONS(2)Tune shift along the chain
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Limitations(3)
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Protons-Ions

• Ions from Linac3-LEIR
• Protons from Linac2-PSB (high density and
  intensity)
• There is a double RF system in the LHC
• Sequencing system will allow PPM(Pulse to Pulse
  Modulation)

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Ions-Ions in LHC

• Linac3 can do the ions with some preparation,
• Whatever are the ions, we think that we are
  modifying the LEIR machine in such a way that
  these ions are possible.
• But the number of ions per bunch is limited to
  space charge at low energyfurther studies are
  needed.
• But the LEIR cycle can be longer(cooling time
  prop. to Z2/A)

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LHC Ions1- Ions2

• Seems not to be a priority, alt least not before
  201x.
• In any cases, a second sourceRFQ is needed in
  Linac3
• PPM operation (some minutes between the two ion
  beam)

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CONCLUSION

• LEIR is modified in such a way that other ions
  can be done,
• The real intensity limit has to be studied .