совещании СПИН-2005 (Дубна)
1. Spin physics program in the U70 polarized proton beam
Igor A. Savin,
Serpukhov, IHEP & Troitsk, INR & Dubna, JINR
& SINP, Moscow & Novosibirsk, IYF
A possibility to accelerate a high intensity polarized proton beam up
GeV at the IHEP accelerator, extract it from the main ring and deliver
several experimental setups is being studied now. We propose to study a
of single- and double-spin observables in various reactions using
longitudinally and transverserly polarized proton beams at U70. The
measurements can be done at the existing detectors as well as require
a few new experimental setups at U70.
2. The proton beam polarimetry at the IHEP U-70
The polarized proton beam is planned to be accelerated in the U70
accelerator of IHEP (Protvino, Russia). The polarized ion source feeds
the chain: Linac Ural30 - Booster 1.5 - U70. After acceleration up to
70- GeV the polarized beam is assumed to be extracted by fast or/and
slow extraction systems and distributed over several fixed target
experimental set-ups. The main goal of this presentation is to analyze
the possible means of measuring the proton beam polarization at the
appropriate places in the chain.
3. About Polarized protons acceleration at U-70
Otboyev, P.Yu.Shatunov, Yu.M.Shatunov,V.Ivanov, S.B.Nurushev
A possibility to accelerate polarized proton at the synchrotron U-70
is considered. Estimations of the spin resonances are given in the
energy range 2.5 – 70 GeV. To suppress depolarizing effects of spin
resonances, a scheme of three partial Siberian snakes is suggested.
Each snake consists from helical magnets with 4.5 T magnetic field.
The scheme provides the adiabatic spin flip at imperfection
resonances and suppresses all intrinsic resonances by quite realistic
beam emittance and magnets misalignments
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