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AbstractAbstract
[en] A dynamically polarized deuterium target was constructed to determine the second-order analyzing power T20 in π-d elastic scattering. The required deuterium alignment can be enchanced by high-intensity rf irradiation of oriented deuterium nuclei. A method was developed to obtain the target-averaged alignment from NMR spectra. Of the irradiation schemes that were tested experimentally, the rf burning of the pedestal area at the edge of the NMR spectrum provided the largest alignment increase (more than a factor 1.5). For this spin reorientation lifetimes longer than 50 h were measured. (orig.)
Primary Subject
Record Type
Journal Article
Journal
Nuclear Instruments and Methods in Physics Research. Section A, Accelerators, Spectrometers, Detectors and Associated Equipment; ISSN 0168-9002; ; CODEN NIMAE; v. 251(3); p. 498-510
Country of publication
ACCELERATOR FACILITIES, BOSONS, ELEMENTARY PARTICLES, EQUILIBRIUM, HADRON REACTIONS, HADRONS, HYDROGEN ISOTOPES, ISOTOPES, LIGHT NUCLEI, MAGNETIC RESONANCE, MESON REACTIONS, MESONS, NUCLEAR REACTIONS, NUCLEI, ODD-ODD NUCLEI, ORIENTATION, PSEUDOSCALAR MESONS, RELAXATION, RESONANCE, SCATTERING, SPECTRA, STABLE ISOTOPES, TARGETS
Reference NumberReference Number
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AbstractAbstract
[en] A polarized proton target with a volume of 55 cm3 was constructed at TRIUMF to study neutron induced reactions. The polarizable protons were contained in the molecules of 1-butanol that was frozen in the form of beads and placed in the mixing chamber of a vertical dilution refrigerator. The target system was operated about 200 h for a high precision neutron scattering experiment to test charge symmetry breaking. The highest polarization achieved was -0.97. The relaxation time was typically 150 h in a magnetic field of 0.257 T and at a temperature of 60 mK. (orig.)
Primary Subject
Record Type
Journal Article
Journal
Nuclear Instruments and Methods in Physics Research. Section A, Accelerators, Spectrometers, Detectors and Associated Equipment; ISSN 0168-9002; ; CODEN NIMAE; v. 264(2/3); p. 186-193
Country of publication
CAMAC SYSTEM, CHARGE INDEPENDENCE, CONTROL SYSTEMS, DATA TRANSMISSION, HELIUM DILUTION REFRIGERATORS, HYDROGEN 1 TARGET, MAGNET COILS, MAGNETIC FIELDS, MEV RANGE 100-1000, MICROPROCESSORS, MICROWAVE EQUIPMENT, NEUTRON REACTIONS, NUCLEAR MAGNETIC RESONANCE, POLARIZATION-ASYMMETRY RATIO, POLARIZED TARGETS, RELAXATION TIME, REMOTE CONTROL, SOLENOIDS, SPIN ORIENTATION, SYMMETRY BREAKING, TARGET CHAMBERS, TEMPERATURE DEPENDENCE, TRIUMF CYCLOTRON, ULTRALOW TEMPERATURE
ACCELERATOR FACILITIES, ACCELERATORS, BARYON REACTIONS, COMMUNICATIONS, CONTROL, CYCLIC ACCELERATORS, CYCLOTRONS, ELECTRIC COILS, ELECTRICAL EQUIPMENT, ELECTRONIC CIRCUITS, ELECTRONIC EQUIPMENT, ENERGY RANGE, EQUIPMENT, HADRON REACTIONS, INVARIANCE PRINCIPLES, ISOCHRONOUS CYCLOTRONS, MAGNETIC RESONANCE, MEV RANGE, MICROELECTRONIC CIRCUITS, NUCLEAR REACTIONS, NUCLEON REACTIONS, ORIENTATION, REFRIGERATORS, RESONANCE, TARGETS
Reference NumberReference Number
INIS VolumeINIS Volume
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AbstractAbstract
[en] The NMR system and the polarization measurements of the TRIUMF polarized deuterium target are described. The NMR tuned circuit is kept resonant at all frequencies to allow for a high gain in the rf amplifiers and to permit the measurement of the real part of the NMR signal. A Starburst (J-11) and LSI-11 are used to process the NMR signal at a high sample rate. A synthesizer under the control of an 8085 based microprocessor (TRIMAC) provides the rf sweep. Vector polarizations between -0.33 and -0.40 were routinely achieved during a four week run in the TRIUMF M11 pion beamline with a statistical uncertainty of 3.4% and a systematic uncertainty of 5%. (orig.)
Primary Subject
Record Type
Journal Article
Journal
Nuclear Instruments and Methods in Physics Research, Section A; ISSN 0168-9002; ; CODEN NIMAE; v. 274(3); p. 515-521
Country of publication
AMPLIFIERS, BEAM TRANSPORT, DATA PROCESSING, DEUTERIUM TARGET, MICROPROCESSORS, NMR SPECTRA, NMR SPECTROMETERS, NUCLEAR MAGNETIC RESONANCE, PION BEAMS, POLARIZATION-ASYMMETRY RATIO, POLARIZED TARGETS, REMOTE CONTROL, RF SYSTEMS, SPIN ORIENTATION, TARGET CHAMBERS, THERMAL EQUILIBRIUM, TRIUMF CYCLOTRON
ACCELERATOR FACILITIES, ACCELERATORS, BEAMS, CONTROL, CYCLIC ACCELERATORS, CYCLOTRONS, ELECTRONIC CIRCUITS, EQUILIBRIUM, EQUIPMENT, ISOCHRONOUS CYCLOTRONS, MAGNETIC RESONANCE, MEASURING INSTRUMENTS, MESON BEAMS, MICROELECTRONIC CIRCUITS, ORIENTATION, PARTICLE BEAMS, RESONANCE, SPECTRA, SPECTROMETERS, TARGETS
Reference NumberReference Number
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AbstractAbstract
[en] A cryogenic target has been constructed and used with both liquid 20Ne and 22Ne as well as liquid deuterium in the temperature range of 18-26 K. The target was designed for use with the Triumf low-energy QQD pion spectrometer, and it presented to an incident pion beam a bubble-free slab of liquid isotopically enriched neon which was 3 mm thick and 75 mm in diameter. (orig.)
Primary Subject
Record Type
Journal Article
Journal
Nuclear Instruments and Methods in Physics Research. Section A, Accelerators, Spectrometers, Detectors and Associated Equipment; ISSN 0168-9002; ; CODEN NIMAE; v. 265(3); p. 407-410
Country of publication
Reference NumberReference Number
INIS VolumeINIS Volume
INIS IssueINIS Issue
Bandyopadhyay, D.; Birchall, J.; Campbell, J.; Davis, C.A.; Davison, N.E.; Page, S.A.; Ramsay, W.D.; Sekulovich, A.M.; Oers, W.T.H. van; Davis, C.A.; Healey, D.C.; Schmor, P.W.; Stinson, G.M.; Boyce, M.; Green, P.W.; Korkmaz, E.; Soukup, J.; Bowman, J.D.; Mischke, R.E.
Weak and electromagnetic interactions in nuclei1989
Weak and electromagnetic interactions in nuclei1989
AbstractAbstract
[en] An experiment is in progess at TRIUMF to measure the parity-violating longitudinal analyzing power Az in polarizedp-p scattering at 222 MeV. Previous measurements at 15 and 45 MeV have determined the parity-mixed partial wave scattering amplitude to high precision. In contrast, only the (3P2-1D2) amplitude contributes to Az at 222 MeV. These two amplitudes yield complementary information on the underlying parity violating reaction mechanism. In a weak meson exchange model, the (3P2-1D2) amplitude is entirely due to rho meson exchange, and the present experiment affords a unique opportunity to measure the weak ρ-N coupling strength hρ. At TRIUMF, a 500 nA beam of longitudinally polarized protons (pz∼0.8) from the optically pumped polarized ion source will be scattered from a 20 cm liquid hydrogen target. A unique feature of this experiment is that Az will be measured in two different geometries (scattering and transmission mode) simultaneously, which will provide a crucial consistency check on the results. Monte Carlo simulations have confirmed that d.c. ionization chambers used to collect the transmitted and scattered protons in the two simultaneous measurements will achieve comparable statistical accuracies in the ∼ 300 hour counting time proposed for the experiment. High precision monitoring devices are being constructed and tested at TRIUMF to monitor changes in beam properties, such as beam position and residual transverse polarization, that can contribute to systematic errors in the parity violation measurements. The present status of the detector developments and systematic error controls will be discussed
Primary Subject
Source
Depommier, P. (ed.); 849 p; ISBN 2-86332-072-6; ; 1989; p. 557-560; Editions Frontieres; Gif-sur-Yvette (France); International Symposium on Weak and Electromagnetic Interactions in Nuclei (WEIN-89); Montreal, PQ (Canada); 15-19 May 1989
Record Type
Book
Literature Type
Conference
Country of publication
ACCELERATORS, BARYON-BARYON INTERACTIONS, BASIC INTERACTIONS, BEAMS, CYCLIC ACCELERATORS, CYCLOTRONS, ENERGY RANGE, HADRON-HADRON INTERACTIONS, INTERACTIONS, INVARIANCE PRINCIPLES, ISOCHRONOUS CYCLOTRONS, MEV RANGE, NUCLEON-NUCLEON INTERACTIONS, PARTICLE INTERACTIONS, PROTON-NUCLEON INTERACTIONS, SCATTERING
Reference NumberReference Number
Related RecordRelated Record
INIS VolumeINIS Volume
INIS IssueINIS Issue
Birchall, J.; Davison, N.E.; Page, S.A.; Ramsay, W.D.; Sekulovich, A.; van Oers, W.T.H.; Bowman, J.D.; Coombes, G.H.; Fielding, H.; Green, P.W.; Korkmaz, E.; Roy, G.; Soukup, J.; Stinson, G.M.; Davis, C.A.; Healey, D.C.; Miller, C.A.; Schmor, P.W.
Fundamental symmetries in nuclei and particles1990
Fundamental symmetries in nuclei and particles1990
AbstractAbstract
[en] This paper reports on an experiment that is underway at TRIUMF to measure the parity violating longitudinal analyzing power Az in bar pp scattering to an accuracy of 2 x 10-8. The beam energy of 222 MeV and the geometry of the detectors is chosen to isolate that portion of the weak nucleon-nucleon interaction arising from ρ-meson exchange. The high value of the parity allowed analyzing power at 222 MeV makes the experiment extremely sensitive to systematic errors. Instumentation which provides very accurate measurement of beam position and shape is now being tested and a precision polarization profile monitor is under development
Primary Subject
Source
Henrikson, H.; Vogel, P. (California Inst. of Tech., Pasadena, CA (United States)); 304 p; ISBN 981-02-0060-9; ; 1990; p. 191-192; World Scientific Pub. Co; Teaneck, NJ (United States); Fundamental symmetries in nuclei and particles: symposium honoring Felix Boehm's 65th birthday; Pasadena, CA (United States); 7-9 Sep 1989; CONF-890979--; World Scientific Pub. Co., 687 Hartwell Street, Teaneck, NJ 07666 (United States)
Record Type
Book
Literature Type
Conference
Country of publication
ACCELERATORS, BARYON-BARYON INTERACTIONS, BASIC INTERACTIONS, CYCLIC ACCELERATORS, CYCLOTRONS, ENERGY RANGE, HADRON-HADRON INTERACTIONS, INTERACTIONS, INVARIANCE PRINCIPLES, ISOCHRONOUS CYCLOTRONS, MATHEMATICAL MODELS, MATHEMATICS, MEASURING INSTRUMENTS, MEV RANGE, PARTICLE INTERACTIONS, PARTICLE MODELS, PERIPHERAL MODELS
Reference NumberReference Number
INIS VolumeINIS Volume
INIS IssueINIS Issue
Abegg, R.; Davis, C.A.; Delheij, P.P.J.; Healey, D.C.; Miller, C.A.; Stinson, G.M.; Wait, G.D.; Bandyopadhyay, D.; Birchall, J.; Davis, C.A.; Davison, N.E.; Page, S.A.; Ramsay, W.D.; Sekulovich, A.; Oers, W.T.H. van; Zhao, J.; Cairns, E.B.; Choi, K.; Green, P.W.; Greeniaus, L.G.; Korkmaz, E.; Rodning, N.L.; Soukup, J.
Weak and electromagnetic interactions in nuclei1989
Weak and electromagnetic interactions in nuclei1989
AbstractAbstract
[en] An experiment similar in most respects to the recently completed TRIUMF experiment (E121) is being prepared for data taking. The experiment will measure the difference in analysis powers An and Ap (where the subscript denotes the polarised nucleon) at the zero-crossing angle in neutron-proton elastic scattering at 350 MeV. Designed as a null measurement, the experiment is to achieve an accuracy in ΔA = An - Ap of ±0.0008. In addition the experiment is to determine the shape of the angular distribution of ΔA in the range 600 to 900 c.m. The quantity ΔA is directly proportional to the isospin mixing or spin singlet-triplet mixing amplitude and therefore directly relates to charge symmetry breaking terms in the N-N interaction
Primary Subject
Source
Depommier, P. (ed.); 849 p; ISBN 2-86332-072-6; ; 1989; p. 585-588; Editions Frontieres; Gif-sur-Yvette (France); International Symposium on Weak and Electromagnetic Interactions in Nuclei (WEIN-89); Montreal, PQ (Canada); 15-19 May 1989
Record Type
Book
Literature Type
Conference
Country of publication
Reference NumberReference Number
Related RecordRelated Record
INIS VolumeINIS Volume
INIS IssueINIS Issue
Davis, C.A.; Abegg, R.; Berdoz, A.R.; Birchall, J.; Cairns, E.B.; Campbell, J.; Choi, K.; Coombes, G.H.; Davison, N.E.; Delheij, P.P.J.; Green, P.W.; Greeniaus, L.G.; Healey, D.C.; Korkmaz, E.; Li, J.; Miller, C.A.; Page, S.A.; Ramsay, W.D.; Rodning, N.L.; Sekulovich, A.M.; Soukup, J.; Stinson, G.M.; Oers, W.T.H. van; Wait, G.D.; Zhao, J.
High energy spin physics. Vol. 11991
High energy spin physics. Vol. 11991
AbstractAbstract
[en] Published in summary form only
Primary Subject
Source
Althoff, K.H.; Meyer, W. (Physikalisches Inst., Bonn Univ. (Germany)) (eds.); 666 p; ISBN 3-540-54127-6; ; 1991; p. 593-596; Springer; Berlin (Germany); 9. international symposium on high energy spin physics; Bonn (Germany); 6-15 Sep 1990
Record Type
Book
Literature Type
Conference
Country of publication
ACCURACY, CAPTURE, CHARGE INDEPENDENCE, COUNTING TECHNIQUES, DEUTERIUM, ELASTIC SCATTERING, HYDROGEN 1 TARGET, MEV RANGE 100-1000, NEUTRON REACTIONS, NEUTRONS, PARTICLE PRODUCTION, PIONS NEUTRAL, POLARIZATION-ASYMMETRY RATIO, POLARIZED BEAMS, POLARIZED TARGETS, PROTON-NEUTRON INTERACTIONS, PROTONS, SYMMETRY BREAKING, TRIUMF CYCLOTRON
ACCELERATORS, BARYON REACTIONS, BARYON-BARYON INTERACTIONS, BARYONS, BEAMS, BOSONS, CATIONS, CHARGED PARTICLES, CYCLIC ACCELERATORS, CYCLOTRONS, ELEMENTARY PARTICLES, ENERGY RANGE, FERMIONS, HADRON REACTIONS, HADRON-HADRON INTERACTIONS, HADRONS, HYDROGEN IONS, HYDROGEN IONS 1 PLUS, HYDROGEN ISOTOPES, INTERACTIONS, INVARIANCE PRINCIPLES, IONS, ISOCHRONOUS CYCLOTRONS, ISOTOPES, LIGHT NUCLEI, MESONS, MEV RANGE, NUCLEAR REACTIONS, NUCLEI, NUCLEON REACTIONS, NUCLEON-NUCLEON INTERACTIONS, NUCLEONS, ODD-ODD NUCLEI, PARTICLE INTERACTIONS, PIONS, PROTON-NUCLEON INTERACTIONS, PSEUDOSCALAR MESONS, SCATTERING, STABLE ISOTOPES, TARGETS
Reference NumberReference Number
INIS VolumeINIS Volume
INIS IssueINIS Issue
Abegg, R.; Davis, C.A.; Delheij, P.P.J.; Greeniaus, L.G.; Healey, D.C.; Miller, C.A.; Wait, G.D.; Ahmad, M.; Green, P.W.; Lapointe, C.; McDonald, W.J.; Moss, G.A.; Rodning, N.L.; Roy, G.; Ye, Y.
TRIUMF, Vancouver, BC (Canada)1989
TRIUMF, Vancouver, BC (Canada)1989
AbstractAbstract
[en] In order to improve existing I=0 phase shift solutions, the spin correlation parameter, ANN, and the analyzing powers, A0N and AN0, have been measured in n-p elastic scattering over an angular range of 50 degrees -150 degrees (c.m.) at three neutron energies, 220, 325 and 425 MeV to an absolute accuracy of ±0.03. The data have a profound effect on various phase parameters, particularly the 1P1, 3D2 and ε1 phase parameters which in some cases change by almost a degree. With exception of the highest energy, the data support the predictions of the latest version of the Bonn potential. Also the analyzing power data (A0N and AN0) measured at 477 MeV in a different experiment over a limited angular range (60 degrees - 80 degrees (c.m.)) are reported here. (Author) 30 refs., 10 figs., 5 tabs
Primary Subject
Source
Jun 1989; 25 p; Submitted to Physical Review C.
Record Type
Report
Literature Type
Numerical Data
Report Number
Country of publication
Reference NumberReference Number
INIS VolumeINIS Volume
INIS IssueINIS Issue
Page, S.A.; Berdoz, A.R.; Birchall, J.; Campbell, J.C.; Davison, N.E.; Mosscrep, D.R.; Ramsay, W.D.; Sekulovich, A.M.; van Oers, W.H.; Bowman, J.D.; Mischke, R.E.
Parity violation in electron scattering1990
Parity violation in electron scattering1990
AbstractAbstract
[en] In this paper parity violation in the nucleon-nucleon interaction at low and intermediate energies is described in terms of a meson exchange model involving π, ρ and ω mesons, with one strong and one weak vertex. Experiments have yielded significant but incomplete information on weak meson-nucleon couplings, which are in qualitative agreement with predictions based on the Standard Model. An experiment currently underway at TRIUMF will determine the helicity dependence of the p-p scattering cross section at 222 MeV to ± 2 x 10-8 or better, yielding an experimental constraint on the weak ρ-nucleon coupling to ± 30%, as compared with a theoretical uncertainty of ± ∼ 100%
Primary Subject
Secondary Subject
Source
Beise, E.J.; McKeown, R.D. (WK Kellogg Radiation Laboratory, 106-38 Caltech, Pasadena, CA (United States)); 239 p; ISBN 981-02-0265-2; ; 1990; p. 204-207; World Scientific Pub. Co; Teaneck, NJ (United States); Workshop on parity violation in electron scattering; Pasadena, CA (United States); 23-24 Feb 1990; CONF-9002117--; World Scientific Pub. Co., 687 Hartwell Street, Teaneck, NJ 07666 (United States)
Record Type
Book
Literature Type
Conference
Country of publication
ACCELERATORS, BARYON-BARYON INTERACTIONS, BOSONS, CYCLIC ACCELERATORS, CYCLOTRONS, ELEMENTARY PARTICLES, ENERGY RANGE, FIELD THEORIES, GRAND UNIFIED THEORY, HADRON-HADRON INTERACTIONS, HADRONS, INTERACTIONS, INVARIANCE PRINCIPLES, ISOCHRONOUS CYCLOTRONS, MATHEMATICAL MODELS, MEV RANGE, NUCLEON-NUCLEON INTERACTIONS, PARTICLE INTERACTIONS, PARTICLE MODELS, PARTICLE PROPERTIES, PERIPHERAL MODELS, PROTON-NUCLEON INTERACTIONS, QUANTUM FIELD THEORY, SCATTERING, UNIFIED GAUGE MODELS
Reference NumberReference Number
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