Download or read book Optical Neutron Polarizers written by and published by . This book was released on 1990 with total page 10 pages. Available in PDF, EPUB and Kindle. Book excerpt: A neutron wave will be refracted by an appropriately varying potential. Optical neutron polarizers use spatially varying, spin- dependent potentials to refract neutrons of opposite spin states into different directions, so that an unpolarized beam will be split into two beams of complementary polarization by such a device. This paper will concentrate on two methods of producing spin-dependent potentials which are particularly well-suited to polarizing cold neutron beams, namely thin-film structures and field-gradient techniques. Thin-film optical devices, such as supermirror multilayer structures, are usually designed to deviate only one spin-state, so that they offer the possibility of making insertion (transmission) polarizers. Very good supermirrors may now be designed and fabricated, but it is not always straightforward to design mirror-based devices which are useful in real (divergent beam) applications, and some practical configurations will be discussed. Field-gradient devices, which are usually based on multipolar magnets, have tended to be too expensive for general use, but this may change with new developments in superconductivity. Dipolar and hexapolar configurations will be considered, with emphasis on the focusing characteristics of the latter. 21 refs., 7 figs.
Download or read book Thin film Neutron Optical Devices written by Charles Majkrzak and published by . This book was released on 1989 with total page 222 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Handbook of Neutron Optics written by Masahiko Utsuro and published by John Wiley & Sons. This book was released on 2010-01-12 with total page 610 pages. Available in PDF, EPUB and Kindle. Book excerpt: Written by authors with an international reputation, acknowledged expertise and teaching experience, this is the most up-to-date resource on the field. The text is clearly structured throughout so as to be readily accessible, and begins by looking at scattering of a scalar particle by one-dimensional systems. The second section deals with the scattering of neutrons with spin in one-dimensional potentials, while the third treats dynamical diffraction in three-dimensional periodic media. The final two sections conclude with incoherent and small angle scattering, and some problems of quantum mechanics. With its treatment of the theories, experiments and applications involved in neutron optics, this relevant reading for nuclear physicists and materials scientists alike.
Download or read book Neutron Optics written by Varley F. Sears and published by New York : Oxford University Press. This book was released on 1989 with total page 344 pages. Available in PDF, EPUB and Kindle. Book excerpt: An Introduction to the Theory of Neutron Optical Phenomena and their Applications.
Download or read book Optical Model Analysis of Polarization in Neutron Scattering at 2 09 MeV written by Peter Edward Hodgson and published by . This book was released on 1962 with total page 2 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Polarization Measurements and Optical Model Analyses of Neutron Scattering at 3 2 MeV written by Egbertus Zijp and published by . This book was released on 1972 with total page 87 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Neutron Optical Devices and Applications written by Charles Majkrzak and published by . This book was released on 1992 with total page 514 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Advances in Neutron Optics written by Maria L. Calvo and published by CRC Press. This book was released on 2019-11-11 with total page 308 pages. Available in PDF, EPUB and Kindle. Book excerpt: Neutron optics studies the interactions of a beam of slow neutrons with matter. This book updates various advances on neutron optics. There will be a focus on the very active topics of neutron imaging (NI) and neutron spin optics (NSO). The book will also present applications of neutron beams in biomedicine, such as Boron Neutron Capture Therapy (BNCT) and related techniques. Features: Discusses diffraction and interference of slow neutrons, including computational approaches Reviews neutron imaging (NI) and neutron spin optics (NSO) Treats two major sources of slow neutron beams: (1) fission reactions at nuclear reactors and (2) collisions in particle accelerators (small ones, spallation sources) of charged particle beams with targets of heavy atoms Selects subjects on fundamental quantum aspects of slow neutrons and on confined propagation and waveguiding thereof Updates slow neutron beams and BNCT
Download or read book Advances in Neutron Optics written by Maria L. Calvo and published by CRC Press. This book was released on 2019-12-05 with total page 253 pages. Available in PDF, EPUB and Kindle. Book excerpt: Neutron optics studies the interactions of a beam of slow neutrons with matter. This book updates various advances on neutron optics. There will be a focus on the very active topics of neutron imaging (NI) and neutron spin optics (NSO). The book will also present applications of neutron beams in biomedicine, such as Boron Neutron Capture Therapy (BNCT) and related techniques. Features: Discusses diffraction and interference of slow neutrons, including computational approaches Reviews neutron imaging (NI) and neutron spin optics (NSO) Treats two major sources of slow neutron beams: (1) fission reactions at nuclear reactors and (2) collisions in particle accelerators (small ones, spallation sources) of charged particle beams with targets of heavy atoms Selects subjects on fundamental quantum aspects of slow neutrons and on confined propagation and waveguiding thereof Updates slow neutron beams and BNCT
Download or read book Thin film Neutron Optical Devices written by Charles F. Majkrzak and published by . This book was released on 1988 with total page 208 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Modern Developments in X Ray and Neutron Optics written by Alexei Erko and published by Springer Science & Business Media. This book was released on 2008-04-14 with total page 540 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume describes modern developments in reflective, refractive and diffractive optics for short wavelength radiation. It also covers recent theoretical approaches to modelling and ray-tracing the x-ray and neutron optical systems. It is based on the joint research activities of specialists in x-ray and neutron optics, working together under the framework of the European Programme for Cooperation in Science and Technology (COST, Action P7) in the period 2002-2006.
Download or read book Neutron Polarizers Based on Polarized 3He written by and published by . This book was released on 2005 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The goal of this work, which is a collaborative effort between Indiana University, NIST, and Hamilton College, is to extend the technique of polarized neutron scattering into new domains by the development and application of polarized 3He-based neutron spin filters. After the IPNS experiment which measured Zeeman sp[litting in surface scattered neutrons using a polarized 3He cell as a polarization analyzer transporterd by car from Bloomington to Chicago, the Indiana work focused on technical developments to improve the 3He polarization of the Indiana compression system. The compression system was rebuilt with a new valve system which allows gas trapped in the dead volume of the compressors at the end of the piston stroke to be exhausted and conducted back to the optical pumping cell where it can be repolarized. We also incorporated a new intermediate storage volume made at NIST from 1720 glass which will reduce polarization losses between the compressors. Furthermore, we improved the stability of the 1083 nm laser by cooling the LMA rod. We achieved 60% 3he polarization in the optical pumping cell and 87% preservation of the polarization during compression. In parallel we built a magnetically-shielded transport solenoid for use on neutron scattering instruments such as POSY which achieves a fractional field uniformity of better than 10-3 per cm. The field was mapped using an automated 3D field mapping system for in-situ measurement of magnetic field gradients Diluted magnetic semiconductors offer many exciting opportunities for investigation of spintronic effects in solids and are certain to be one of the most active areas of condensed matter physics over then next several years. These materials can act as efficient spin injectors for devices that make use of spin-dependent transport phenomena. We just (late July 2002) finished a neutron reflectivity experiment at NIST on a GaMnAs trilayer film. This material is a ferromagnetic semiconductor which is of interest for possible applications in spintronics. With the temperature at 12 K and H=235G which saturated both layers' moment to be parallel to the guide field we saw ferromagnetic alignment (FM) of the two outer layers. We also have evidence that the two magnetic layers have different Tc's, and can therefore be used to fabricate a spin-valve. We see a peak at a location in q-space that could correspond to an anti-ferromagnetic state. Finally, we made progress in assembling a spin-exchange optical pumping system which will eventually be relocated to IPNS as an on-site neutron spin filter. As this is written we are preparing for the first effort to optically pump 3He using spin exchange at Indiana. This device will be operational before the end of the present grant. The goal of the work funded by the subcontract to Hamilton College was to support the work of NIST and Indiana in developing 3He-based neutron spin filters for use in polarized neutron scattering applications. Most of the grant period was used by Hamilton to construct the required infrastructure, including 3He cell filling and NMR systems. The main achievement at Hamiltonin is the successful operation of the spin exchange filling system to make a 3He spin exchange cell with a spin relaxation time of 300 hours. This very long relaxation time bodes well for the further development of spin exchange 3He spin filters. Hamilton also constructed a portable NMR device that was used at Indiana to conduct the compression system measurements.
Download or read book Neutron Optics written by James L. Wood and published by SPIE-International Society for Optical Engineering. This book was released on 2001 with total page 194 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Handbook of Neutron Optics written by Masahiko Utsuro and published by Wiley-VCH. This book was released on 2010-03-01 with total page 610 pages. Available in PDF, EPUB and Kindle. Book excerpt: Written by authors with an international reputation, acknowledged expertise and teaching experience, this is the most up-to-date resource on the field. The text is clearly structured throughout so as to be readily accessible, and begins by looking at scattering of a scalar particle by one-dimensional systems. The second section deals with the scattering of neutrons with spin in one-dimensional potentials, while the third treats dynamical diffraction in three-dimensional periodic media. The final two sections conclude with incoherent and small angle scattering, and some problems of quantum mechanics. With its treatment of the theories, experiments and applications involved in neutron optics, this relevant reading for nuclear physicists and materials scientists alike.
Download or read book Toward Precision D Coefficient Measurement in Polarized Neutron Decay and the Development of a 3He Neutron Polarizer written by Shenq-Rong Hwang and published by . This book was released on 1998 with total page 388 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Capture of Polarized Neutrons by Polarized Sm149 Nuclei written by L. D. Roberts and published by . This book was released on 1954 with total page 30 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Enhanced Polarizing Neutron Optics with 11B4C Incorporation written by Anton Zubayer and published by . This book was released on 2023 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
