-
I M Sitnik,
C F Perdrisat,
E Tomasi-Gustafsson,
J Ball,
L Bimbot,
Y Bisson,
M Boivin,
Yu T Borzunov,
J L Boyard,
Ph Courtat, [......],
M K Jones,
R Kunne,
L V Malinina,
S Nedev,
N M Piskunov,
V Punjabi, J L Sans,
R Skowron,
E A Strokovsky,
J Yonnet
[show abstract]
[hide abstract]
ABSTRACT: The tensor polarization (ρ20) of deuterons emitted in the p(3He,d)X reaction at 0° in the lab. system was measured at the Saturne National Laboratory in Saclay, using the SPES-4 spectrometer with the HYPOM polarimeter in the area of its focal plane. The momentum of the detected deuterons was kept fixed at 3.77 GeV/c, while the momentum of the 3He beam was varied from 4.60 to 5.66 GeV/c, thus providing a range of internal momenta k of the deuteron inside the 3He from 0 up to 0.4 GeV/c. The obtained data are compared with the theoretical predictions.
Journal of Physics Conference Series 05/2011; 295(1):012121.
-
C. E. Allgower,
J. Ball,
M. E. Beddo,
J. Bystrický,
P.-A. Chamouard,
M. Combet,
Ph. Demierre,
J.-M. Fontaine,
D. P. Grosnick,
R. Hess, [......],
A. A. Popov,
A. N. Prokofiev,
D. Rapin, J.-L. Sans,
H. M. Spinka,
A. Teglia,
Yu. A. Usov,
V. V. Vikhrov,
B. Vuaridel,
A. A. Zhdanov
[show abstract]
[hide abstract]
ABSTRACT: Measurements at 18 beam kinetic energies between 1975 and 2795 MeV and at 795 MeV are reported for the pp elastic scattering spin correlation parameter A00nn=(N,N;0,0)=CNN=ANN. The c.m. angular range is typically 60°-100°. These results are compared to previous data from Saturne II and other accelerators. A search for energy-dependent structure at fixed c.m. angles is performed. Comparisons are made to phase shift analysis and theoretical model predictions of this spin observable.
Phys. Rev. C. 08/2001; 64(3).
-
C. E. Allgower,
J. Ball,
L. S. Barabash,
P.-Y. Beauvais,
M. E. Beddo,
N. Borisov,
A. Boutefnouchet,
J. Bystrický,
P.-A. Chamouard,
M. Combet, [......],
A. A. Popov,
A. N. Prokofiev,
D. Rapin, J.-L. Sans,
H. M. Spinka,
Yu. A. Usov,
V. V. Vikhrov,
B. Vuaridel,
C. A. Whitten,
A. A. Zhdanov
[show abstract]
[hide abstract]
ABSTRACT: Measurements at 19 beam kinetic energies between 1795 and 2235 MeV are reported for the pp elastic scattering spin correlation parameter A00nn=ANN=CNN. The c.m. angular range is typically 60–100°. The measurements were performed at Saturne II with a vertically polarized beam and target (transverse to the beam direction and scattering plane), a magnetic spectrometer and a recoil detector, both instrumented with multiwire proportional chambers, and beam polarimeters. These results are compared to previous data from Saturne II and elsewhere.
Phys. Rev. C. 11/2000; 62(6).
-
N. S. Borisov,
A. N. Fedorov,
A. B. Lazarev,
V. N. Matafonov,
A. B. Neganov,
Y. A. Plis,
S. N. Shilov,
Y. A. Usov,
N. A. Bazhanov,
A. I. Kovalev, [......],
A. A. Lukhanin,
J. Černy,
I. Wilhelm,
Z. Janout,
C. Šimane,
M. Vognar,
J. Ball,
G. Durand,
F. Lehar, J. -L. Sans
[show abstract]
[hide abstract]
ABSTRACT: Experience with polarized targets and achieving of very low temperatures gave rise to the idea of using a new technique based
on dissolving 3He in 4He to create a frozen spin polarized target. The short history of the development of such proton and deuteron targets at the
Laboratory of Nuclear Problems (LNP) JINR is given. Recently, the Saclay-Argonne frozen spin proton polarized target used
initially in E704 experiment at FERMILAB was upgraded with adding the missing parts and the first physics experiments was
carried out. At present, a new project is being proposed. The aim of this project is the development of effective methods
of production 6LiD irradiated material for a large volume polarized deuteron target with a high polarization. The research will be carried
out with use of the microtron of Czech Technical University for irradiation and the existing polarized target at Charles University
Nuclear Centre for tests of the target materials.
Czechoslovak Journal of Physics 12/1999; 50:401-408. · 0.42 Impact Factor
-
A. de Lesquen,
C.E. Allgower,
J. Ball,
M. Beddo,
J. Bystrický,
M. Combet,
Ph. Demierre,
G. Durand,
J.-M. Fontaine,
D. Grosnick, [......],
I.L. Pisarev,
A.A. Popov,
A.N. Prokofiev,
D. Rapin, J.-L. Sans,
H.M. Spinka,
Yu.A. Usov,
V.V. Vikhrov,
B. Vuaridel,
A.A. Zhdanov
[show abstract]
[hide abstract]
ABSTRACT: A polarized proton beam from SATURNE II, the Saclay polarized targets with Li compounds, and an unpolarized target were used to measure spin-dependent observables for protons scattered on bound nucleons. The beam and target polarizations
were oriented vertically. The analyzing power and the depolarization were determined at seven energies between 1.1 and 2.4 GeV. The spin correlation parameter was measured at only 1.1 and 1.6 GeV. Measurements with the target at 1.1 GeV provided data for scattering of polarized protons on neutrons in carbon. The quasi-elastic observables are compared with previous
elastic scattering measurements and at 1.1 GeV with predictions of phase shift analyses.
European Physical Journal C 10/1999; 11(1):69-78. · 3.63 Impact Factor
-
J. Ball,
C.E. Allgower,
M. Beddo,
J. Bystrický,
M. Combet,
Ph. Demierre,
G. Durand,
J.-M. Fontaine,
D. Grosnick,
R. Hess, [......],
I.L. Pisarev,
A.A. Popov,
A.N. Prokofiev,
D. Rapin, J.-L. Sans,
H.M. Spinka,
Yu.A. Usov,
V.V. Vikhrov,
B. Vuaridel,
A.A. Zhdanov
[show abstract]
[hide abstract]
ABSTRACT: A polarized proton beam extracted from SATURNE II, the Saclay polarized target with Li compounds, and a target were used to measure elastic and quasi-elastic pp spin-dependent observables in the angular region . The beam and/or target polarizations were oriented vertically. Accurate pp data for the analyzing power , spin-correlation parameter , and the polarization transfer were measured at 1.1 GeV. The observables and were determined at six other energies between 1.6 and 2.4 GeV. At 1.6 GeV, was also obtained. The individual contributions from H, Li, and LiD were deduced. The target provided results on free hydrogen and on protons in carbon. The elastic and quasi-elastic observables are compared with existing data
and with phase-shift analysis predictions.
European Physical Journal C 10/1999; 11(1):51-67. · 3.63 Impact Factor
-
C. E. Allgower,
J. Ball,
M. E. Beddo,
J. Bystrický,
P.-A. Chamouard,
M. Combet,
Ph. Demierre,
J.-M. Fontaine,
D. P. Grosnick,
R. Hess, [......],
A. A. Popov,
A. N. Prokofiev,
D. Rapin, J.-L. Sans,
H. M. Spinka,
A. Teglia,
Yu. A. Usov,
V. V. Vikhrov,
B. Vuaridel,
A. A. Zhdanov
[show abstract]
[hide abstract]
ABSTRACT: Measurements at 18 beam kinetic energies between 1975 and 2795 MeV and at 795 MeV are reported for the pp elastic-scattering single spin parameter Aooon=Aoono=AN=P. The c.m. angular range is typically 60–100°. These results are compared to previous data from Saturne II and other accelerators. A search for energy-dependent structure at fixed c.m. angles is performed, but no rapid changes are observed.
Phys. Rev. C. 10/1999; 60(5).
-
C. E. Allgower,
J. Ball,
L. S. Barabash,
P.-Y. Beauvais,
M. E. Beddo,
Y. Bedfer,
N. Borisov,
A. Boutefnouchet,
J. Bystrický,
P.-A. Chamouard, [......],
A. A. Popov,
A. N. Prokofiev,
D. Rapin, J.-L. Sans,
H. M. Spinka,
Yu. A. Usov,
V. V. Vikhrov,
B. Vuaridel,
C. A. Whitten,
A. A. Zhdanov
[show abstract]
[hide abstract]
ABSTRACT: Experimental results are presented for the pp elastic-scattering single spin observable Aoono=Aooon=AN=P, or the analyzing power, at 19 beam kinetic energies between 1795 and 2235 MeV. The typical c.m. angular range is 60–100°. The measurements were performed at Saturne II with a vertically polarized beam and target (transverse to the beam direction and scattering plane), a magnetic spectrometer and a recoil detector, both instrumented with multiwire proportional chambers, and beam polarimeters.
Phys. Rev. C. 10/1999; 60(5).
-
J. Ball,
M. Beddo,
Y. Bedfer,
J. Bystrický,
P.-A. Chamouard,
M. Combet,
Ph. Demierre,
J.-M. Fontaine,
G. Gaillard,
D. Grosnick,
R. Hess,
R. Kunne,
F. Lehar,
A. de Lesquen,
D. Lopiano,
D. Rapin, J.-L. Sans,
H.M. Spinka
[show abstract]
[hide abstract]
ABSTRACT: The pp elastic scattering analyzing power was measured in small energy steps in the vicinity of the accelerator depolarizing resonance
at 2.202 GeV. A vertically polarized proton beam was extracted from SATURNE II at energies above the resonance and passed
through different copper degraders. The beam was focused on the beam line polarimeter CH target. Its halo was removed by four powerful magnets. Measurements at degraded energies were complemented by data obtained
with the directly extracted polarized beam outside the resonance region. Analyzing power results at fixed laboratory angles
are compared with existing data in the region under discussion, with polynomial fits from 1.6 to 3.5 GeV, and with phase shift
analysis predictions.
European Physical Journal C 09/1999; 10(3):409-413. · 3.63 Impact Factor
-
A. N. Prokofiev,
C. E. Allgower,
L. S. Azhgirej,
J. Ball,
M. Beddo,
Y. Bedfer,
A. Boutefnouchet,
J. Bystricky,
Ph. Demierre,
J. -M. Fontaine, [......],
D. Rapin, J. -L. Sans,
H. M. Spinka,
G. D. Stoletov,
S. Trentalange,
Yu. A. Usov,
V. V. Vikhrov,
B. Vuaridel,
C. A. Whitten,
A. A. Zhdanov
[show abstract]
[hide abstract]
ABSTRACT: Method and results of the beam polarization measurements are presented. The measurements were carried out at the proton polarized
beam of Saturne-II accelerator as well as at the JINR (Dubna) synchrophasotron vector polarized deuteron beam. The analysis of the elastic (quasi-elastic)
pp-scattering polarization is used as a method of the polarization measurements. The energy range of the measurement is 1.0≤T
p
≤2.8 GeV for polarized proton and 1.66≤T
d
≤7.3 GeV for polarized deuteron beams.
Czechoslovak Journal of Physics 01/1999; 49:29-36. · 0.42 Impact Factor
-
C.E. Allgower,
J. Ball,
L.S. Barabash,
M. Beddo,
Y. Bedfer,
A. Boutefnouchet,
J. Bystrický,
P.-A. Chamouard,
Ph. Demierre,
J.-M. Fontaine, [......],
A.A. Popov,
A.N. Prokofiev,
D. Rapin, J.-L. Sans,
H.M. Spinka,
Y.A. Usov,
V.V. Vikhrov,
B. Vuaridel,
C.A. Whitten,
A.A. Zhdanov
[show abstract]
[hide abstract]
ABSTRACT: A polarized proton beam extracted from SATURNE II and the Saclay polarized proton target were used to measure the rescattering
observables and at 26 energies from 1.94 to 2.80 GeV and at 0.80 GeV. The beam and target polarizations were oriented vertically and left-right
as well as up-down asymmetries in the second scattering on carbon were measured. The present data, obtained in small energy
steps, are practically constant as a function of energy at 90°CM, where . These data will bring about important modification to phase shifts and stabilize the solutions.
European Physical Journal C 01/1998; 5(3):453-460. · 3.63 Impact Factor
-
C.E. Allgower,
J. Ball,
L.S. Barabash,
M. Beddo,
Y. Bedfer,
A. Boutefnouchet,
J. Bystricky,
P. Demierre,
J.-M. Fontaine,
V. Ghazikhanian, [......],
A.N. Prokofiev,
D. Rapin, J.-L. Sans,
H.M. Spinka,
S. Trentalange,
Y.A. Usov,
V.V. Vikhrov,
B. Vuaridel,
C.A. Whitten,
A.A. Zhdanov
[show abstract]
[hide abstract]
ABSTRACT: A polarized proton beam extracted from SATURNE II and the Saclay polarized proton target were used to determine the spin correlation parameter AooskA_{oosk} and the rescattering observables KosoK_{os"so} , DoskD_{os"ok} , NosnN_{os"sn} , and NonskN_{onsk} at 1.80 and 2.10 GeV. The beam polarization was oriented perpendicular to the beam direction in the horizontal scattering plane and the target polarization was directed either along the vertical axis or longitudinally. Left-right and up-down asymmetries in the second scattering were measured. A check for the beam optimization with the beam and target polarizations oriented vertically provided other observables, of which results for DononD_{onon} and KonnoK_{onno} at 1.80, 1.85, 2.04, and 2.10 GeV are listed here. The new data at 2.10 GeV suggest a smooth energy dependence of spin triplet scattering amplitudes at fixed angles in the vicinity of this energy.
Zeitschrift für Physik C 12/1997; 1(1):131-138.
-
J. Arvieux,
J. Ball,
J. Bystricky,
J.M. Fontaine,
G. Gaillard,
J.P. Goudour,
R. Hess,
R. Kunne,
F. Lehar,
A. de Lesquen,
D. Lopiano,
M. de Mali,
F. Perrot-Kunne,
D. Rapin,
L. van Rossum, J.L. Sans,
H.M. Spinka
[show abstract]
[hide abstract]
ABSTRACT: The angular dependence of the pppp elastic scattering analyzing power was measured at SATURNE II with an unpolarized proton beam and the Saclay polarized proton target. The energy region in the vicinity of the accelerator depolarizing resonance G g = 6G \gamma = 6 at Tkin = 2.202T_{kin} = 2.202 GeV was studied. Measurements were carried out at seven energies between 2.16 and 2.28 GeV from 17 to 55 CM$. No significant anomaly was observed in the angular and energy dependence of the results presented, whereas the existing data sets differ in this energy range.
Zeitschrift für Physik C 10/1997; 76(3):465-468.
-
B. P. Adiasevich,
V. G. Antonenko,
S. A. Averichev,
L. S. Azhgirey,
J. Ball,
N. A. Bazhanov,
B. Benda,
N. S. Borisov,
Yu. T. Borzunov,
E. I. Bunyatova, [......],
S. V. Topalov,
V. Yu. Trautman,
A. P. Tsvinev,
Yu. A. Usov,
V. V. Vikhrov,
V. I. Volkov,
A. A. Yershov,
V. P. Yershov,
S. A. Zaporozhets,
A. A. Zhdanov
[show abstract]
[hide abstract]
ABSTRACT: Results of the total cross section differenceΔσ
L in anp transmission experiment at 1.19, 2.49 and 3.65 GeV incident neutron beam kinetic energies are presented. Measurements were
performed at the Synchrophasotron of the Laboratory of High Energies of the Joint Institute for Nuclear Research in Dubna.
Results were obtained with a polarized beam of free quasi-monochromatic neutrons passing through the new Dubna frozen spin
proton target. The beam and target polarizations were oriented longitudinally. The present results were obtained at the highest
energies of free polarized neutrons that can be reached at present. They extend the energy range of existing results from
PSI, LAMPF and Saclay measured between 0.066 and 1.10 GeV. The new results are compared withΔσ
L(pn) data determined as a difference betweenΔσ
L(pd) andΔσ
L(pp) ANL-ZGS measurements. The values ofΔσ
L for the isospin stateI=0 were deduced using knownpp data.
Zeitschrift für Physik C 04/1996; 71(1):65-74.
-
J. Ball,
B. Benda,
P. Chaumette,
M. Combet,
J. Derégel,
G. Durand,
C. Gaudron,
Z. Janout,
T. E. Kasprzyk,
B. A. Khachaturov,
F. Lehar,
A. de Lesquen,
V. N. Matafonov, J.‐L. Sans,
Yu. A. Usov
[show abstract]
[hide abstract]
ABSTRACT: Continuous improvements of SATURNE polarized target resulted in a flexible and reliable facility for spin physics. For polarized neutron target, two cartridges loaded with 6LiD and 6LiH are set in the refrigerator and can be quickly inserted in the beam. The polarized proton target is a 70 cm3 cartridge loaded with Pentanol‐2, a promising material according to the results obtained. Angular distribution as a function of a kinematically conjugate angle and coplanarity in nucleon‐nucleon scattering is shown for different targets. © 1995 American Institute of Physics.
AIP Conference Proceedings. 08/1995; 343(1):550-554.
-
J. Ball,
Ph. Chesny,
M. Combet,
J. M. Fontaine,
R. Kunne,
C. D. Lac, J. L. Sans,
J. Bystricky,
P. Chaumette,
J. Derégel, [......],
E. Rössle,
H. Schmitt,
L. S. Barabash,
Z. Janout,
B. A. Khachaturov,
Yu. A. Usov,
D. Lopiano,
H. Spinka,
V. Ghazikhanian,
C. Whitten
[show abstract]
[hide abstract]
ABSTRACT: Neutron-proton total cross section differences with the beam and target polarizations orientated either transversally or longitudinally with respect to the beam direction, as well as 11 spin dependent elastic scattering observables measured at SATURNE II as a function of energy and angle are presented. A major part of results was measured using the quasimonoenergetic polarized neutron beam and/or the polarized proton target. A small part of data was obtained using a polarized deuteron beam considered as a beam of quasifree neutrons and protons. The present paper represents a review of measured observables. Several sets of present data are compared with results obtained in other laboratories below 0.8 GeV. Imaginary parts of spin dependent forward amplitudes for np scattering and for the isospin stateI=0 were determined. First direct reconstruction of the np scattering matrix at 0.84 GeV is shown.
Czechoslovak Journal of Physics 12/1994; 45(1):23-40. · 0.42 Impact Factor
-
J. Ball,
Ph. Chesny,
M. Combet,
J. M. Fontaine,
R. Kunne,
M. C. Lemaire, J. L. Sans,
J. Bystricky,
C. D. Lac,
F. Lehar, [......],
A. Klett,
R. Peschina-Klett,
E. Rössle,
H. Schmitt,
L. S. Barabash,
Z. Janout,
B. A. Khachaturov,
Yu. A. Usov,
D. Lopiano,
H. Spinka
[show abstract]
[hide abstract]
ABSTRACT: We present data of several rescattering observables measured inn p elastic scattering between 0.80 and 1.10 GeV. The SATURNE II polarized beam of free neutrons obtained from the break-up of polarized deuterons was scattered on the Saclay polarized frozen-spin proton target. Three different configurations of beam and target polarization directions were used: the observablesD
onon
andK
onno
were measured with the normal-normal spin configuration at eight energies;N
onkk
,D
osok
andK
osko
were determined with the longitudinal-longitudinal configuration at six energies;N
onsk
,D
osok
andK
osso
with the sideway-longitudinal configuration at six energies. Part of the data was obtained with an unpolarized CH2 target where only the two spin-index polarization transfer parametersK
osko
andK
osso
were determined. Data are compared with phase shift analyses predictions and with the LAMPF results at 0.788 GeV. Present results are the first measurements of rescattering observables above 0.80 GeV. They provide an important contribution to any future theoretical or phenomenological analysis.
Zeitschrift für Physik C 11/1994; 61(4):579-585.
-
F Lehár,
A de Lesquen,
B P Adiasevich,
V G Antonenko,
S. A. Averichev,
L. S. Azhgirey,
J Ball,
N. A. Bazhanov,
B Benda,
N. S. Borisov, [......],
S V Topalov,
V. Yu. Trautman,
A P Tsvinev,
Yu A Usov,
V V Vikhrov,
V. I. Volkov,
A A Yershov,
V N Yershov,
S. A. Zaporozhets,
A A Zhdanov
-
J Ball,
M E Beddo,
Y Bedfer,
J Bystrický,
P A Chamouard,
Michel Philippe Combet,
P Demièrre,
J M Fontaine,
G Gaillard,
D P Grosnick,
R Hess,
R A Künne,
F Lehár,
A de Lesquen,
D Lopiano,
D Rapin, J L Sans,
H. M. Spinka
-
C E Allgower,
J Ball,
L Barabash,
M E Beddo,
Y Bedfer,
A Boutefnouchet,
J Bystrický,
P A Chamouard,
P Demièrre,
J M Fontaine, [......],
A A Popov,
A N Prokofiev,
D Rapin, J L Sans,
H. M. Spinka,
Yu A Usov,
V V Vikhrov,
B Vuaridel,
C Whitten,
A A Zhdanov
