LEIROTHER IONS - PowerPoint PPT Presentation
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LEIROTHER IONS
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Protons from Linac2-PSB (high density and intensity) There is a double RF system in the ... PPM operation (some minutes between the two ion beam) 26,27,28 March ... – PowerPoint PPT presentation
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Title: 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 .
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