The design and performance of the FNAL high-energy polarized-beam facility

Grosnick, D.; Hill, D.; Laghai, M.; Lopiano, D.; Ōhashi, Y.; Shima, T.; Spinka, H. M.; Stanek, R. W.; Underwood, D. G.; Yokosawa, A.; Lehar, F.; Lesquen, A. de; Rossum, L. van; Carey, David C.; Coleman, R.; Cossairt, J.D.; Read, A. L.; Schailey, R.; Derevschikov, A. A.; Matulenko, Yu. A.; Meschanin, A.; Nurushev, S. B.; Rzaev, R.A.; Solov'yanov, V.L.; Vasiliev, A. N.; Akchurin, N.; Onel, Y.; Imai, K.; Makino, S.; Masaike, A.; Miyake, Kazumasa; Nagamine, T.; Tamura, N.; Yoshida, T.; Takashima, R.; Takéutchi, F.; Mäki, T.; Kuroda, K.; Michalowicz, A.; Shapiro, G.; Tanaka, N.; Salvato, G.; Villari, A.; Gazzaly, M.; Luehring, F.; Miller, Donald H.; Corcoran, M.; Nessi‐Tedaldi, F.; Nessi, M.; Nguyen, C.; Phillips, G.C.; Roberts, J.; White, J. L.; Pauletta, G.; Birsa, R.; Bradamante, F.; Torre-Colautti, S. Dalla; Georgi, M.; Martin, A.; Penzo, A.; Schiavon, P.; Zanetti, A.

doi:10.1016/0168-9002(90)90541-d

Cited by 54 publications

(14 citation statements)

References 20 publications

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“…So far, this method has been twice successfully realized in practice. First, the 185 GeV/c proton and antiproton polarized beam facility has been built and operated at an 800 GeV accelerator of Fermilab for the E704 experiment [5]. Later on, the existing multipurpose beamline at U-70 accelerator has been modified in order to form the 40 GeV/c polarized proton beam for the FODS experiment [6].…”

Section: Introductionmentioning

confidence: 99%

The polarized proton and antiproton beam project at U-70 accelerator

Abramov¹,

Azhgirey²,

Garkusha³

et al. 2018

Nuclear Instruments and Methods in Physics Research Section A:

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Section: Introductionmentioning

confidence: 99%

The polarized proton and antiproton beam project at U-70 accelerator

Abramov¹,

Azhgirey²,

Garkusha³

et al. 2018

Nuclear Instruments and Methods in Physics Research Section A:

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“…So far, the most comprehensive experimental study in this area has been performed in Fermilab experiment E704 [6][7][8]. The polarized proton and antiproton beams of momentum p = 200 GeV/c have been formed from the parity-violating decays of Λ-hyperons [9]. in a similar p T range are also shown [5] For more than 20 years, the E704 results along with the other available data from polarization experiments have been the focus of many theoretical studies (see, for example, Refs.…”

Section: Pos(baldin Ishepp Xxii)103mentioning

confidence: 99%

“…The polarized protons and antiprotons will be produced from the parity-violating decays of Λ-and Λ-hyperons [20,21,9]. By design, the SPASCHARM 12-20 GeV antiproton beam [19] of total intensity up to ~4•10 5 antiproton per 9-second U-70 cycle will be split for physics analysis, using beamtagging information, into three sub-samples with the average transverse polarization of -40%, 0, and +40%.…”

Section: Polarization Experiments With Antiproton Beam V Mochalovmentioning

confidence: 99%

Polarization experiments with antiproton beam

Mochalov¹

2015

Proceedings of XXII International Baldin Seminar on High Energy Physics Problems — PoS(Baldin ISHEPP XXII)

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Polarization phenomena in strong interactions and spin structure of hadrons still are not fully understood theoretically. The experimental data on spin-dependent interactions are also still scarce in some areas, for example, for antiproton-proton collisions.Up to now, the E704 experiment at Fermilab has brought, probably, the largest sample of measured single-spin asymmetries for inclusive pion production in collisions of 200 GeV polarized antiproton with unpolarized protons over a wide x F range (0.2 < x F <0.9). The absolute values of observed asymmetries A N for produced pions grow up as x F increases. For π -, A N is positive and grows up as large as ~20%. For π 0 , it is also positive but smaller, just up to about 10%. For π + , A N is large and negative, down to -30%.The new SPASCHARM experiment at IHEP (Protvino, Russia) will study spin phenomena, using the polarized antiproton beam at the energy of ~15 GeV. At the first stage of experiment, the spin effects in production of hadrons, consisting of light u-, d-, and s-quarks, will be studied. Single-spin asymmetry can be measured for tens of reactions. Polarization effects in hyperon and vector meson production will be explored as well. The second stage of the experiment has the goal to measure singlespin effects in charmonium production as well as carry out the double-spin asymmetry measurements in order to evaluate the contribution of gluon polarization into the spin of proton at large x F .The PANDA experiment proposed at FAIR facility will provide the opportunity for measuring the polarization of strange and single-charmed hyperons in final states of antiproton-proton annihilation.

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“…The collaboration for Polarized Antiproton Experiments (PAX) has proposed a physics program that would be possible with a double-polarized proton-antiproton collider at the new Facility for Antiproton and Ion Research (FAIR), which is to be built at GSI in Darmstadt [1]. Even though a number of methods to provide polarized antiproton beams have been proposed at a workshop more than 20 years ago [2], no polarized antiproton beams have yet been produced, with the exception of a low-quality, secondary beam from the decay of anti-hyperons that has been realized at Fermilab [3].…”

Section: Introductionmentioning

confidence: 99%

Spin-filtering at COSY

Weidemann¹

2011

J. Phys.: Conf. Ser.

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Abstract. The Spin Filtering experiments at COSY and AD at CERN within the framework of the Polarized Antiproton EXperiments (PAX) are proposed to determine the spin-dependent cross sections inpp scattering by observation of the buildup of polarization of an initially unpolarized stored antiproton beam after multiple passage through an internal polarized gas target. In order to commission the experimental setup for the AD and to understand the relevant machine parameters spin-filtering will first be done with protons at COSY. A first major step toward this goal has been achieved with the installation of the required mini-β section in summer 2009 and it's commissioning in January 2010. The target chamber together with the atomic beam source and the so-called Breit-Rabi polarimeter have been installed and commissioned in summer 2010. In addition an openable storage cell has been used. It provides a target thickness of 5·10 13 atoms/cm 2 . We report on the status of spin-filtering experiments at COSY and the outcome of a recent beam time including studies on beam lifetime limitations like intra-beam scattering and the electron-cooling performance as well as machine acceptance studies.

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The design and performance of the FNAL high-energy polarized-beam facility

Cited by 54 publications

References 20 publications

The polarized proton and antiproton beam project at U-70 accelerator

The polarized proton and antiproton beam project at U-70 accelerator

Polarization experiments with antiproton beam

Spin-filtering at COSY

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