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Do we have simulation confirmations?Do we have measurement confirmations?Where has it been used already?How much could we gain with it?Where is it planned to be used in the future?
How much do we expect to gain with it?
Others?
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1Keep constant or reduce bunch brightnessyes, slip-stackingFermilab
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2Reduce peak intensityCERN PSB. JAPRC?double RF in CERN PSBfuture RCSs, eg PIP-IIIfactor of O(2) in N_ppp
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3Increase dispersion
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4Decrease machine radius
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5Increase beam energyyes (kind of)
yes, Linac Upgrade in 1990's, innear future - PIP-II
somewhat less than beta*gamma^2
PIP-II... mb in one of PIP-III optionssomewhat less than beta*gamma^2
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6Reduce time spent
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7Better injection process
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8Lattice optimization (superperiodicity)in princilple, benefits are obvious. The question is about the required precision.
IOTA wants to study that (plan of not fully formulated yet)
JPARC RCS - ?
losses can be reduced by ~ factor of O(3)
yes, PIP-IIIO(3-10) in losses, ~O(2) in N_ppp
I would say better accuracy - larger gain. Potentially it allows to exclude space charge as a main offender. 1% better beating is a present state-of-the-art. Sub-percent is possible with well aimed work.
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9Resonances compensationyes, at least for lattice driven resonances (multiple labs)
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10Working point optimizationmany (machine tune scans)yes
nothing now (all tunes optimzed alraedy)
? none?
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11Localization of SC-induced losses on collimatorsyes (at last in the FNAL Booster)
yes, but only partially effective, upgrading the system now
significant loss reducxtion, but ~40% max in N_ppp
PIP-II era - improved collimation in Booster (and RR/MI?)
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12Cooling after SC-induced emittance blow-up
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13Use circular modesnot yetit was never implementedit was never implementedunclearhopefully, it will be tested in IOTA
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Introduce an inductive insert to compensate LSC
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TSC compensation schemes (e-lenses, e-columns)
yes: E. Stern talk at this workshopnope, IOTA has it in the plannowherefactor of O(2) in dQ_schopefully, it will be tested in IOTAfactor ~O(2)
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16Beneficial effects of space charge
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17Others?
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NonLinear Integrable Opticsnot yet, but IOTA experiements startedVladimirS: If it can contain halo, then loss rate will go down (fixing the consequences without fixing the source of the problem, that is SC)
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Reduction of chromaticity (without having instabilities)FNAL Boosterkind-oflosses approx \proto Q'^2
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Increse bandwidth of dampers to few GHz range
factor 1.5-2 in intensity if it is limeted by beam stabiliy
Was implemented as bunched beam stochastic cooling in RHIC
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