SPIN 2018

Session

Application of Nuclear Polarization Techniques to Other Fields

J

12 Sept 2018, 14:30

University of Ferrara

Conveners

Application of Nuclear Polarization Techniques to Other Fields

• Andrew Sandorfi (Jefferson Lab)
• Georg Bison (Paul Scherrer Institut)
• Alexander Vasiliev (IHEP-Protvino)

Application of Nuclear Polarization Techniques to Other Fields

• Andrew Sandorfi (Jefferson Lab)
• Alexander Vasiliev (IHEP-Protvino)
• Georg Bison (Paul Scherrer Institut)

Application of Nuclear Polarization Techniques to Other Fields

• Alexander Vasiliev (IHEP-Protvino)
• Georg Bison (Paul Scherrer Institut)
• Andrew Sandorfi (Jefferson Lab)

41. Advantages of Nuclear Fusion with Polarized Fuel

Dr Ralf Engels (Institut für Kernphysik, Forschungszentrum Jülich)

12/09/2018, 14:30

Application of Nuclear Polarization Techniques to Other Fields

Parallel Sessions

Since more than 50 years it is known that different spin combinations of the fuel nucleons (t, d, or 3He) modify the differential and the total cross section of the d-t and the 3He-d fusion reactions. Therefore, polarized fuel can be used to increase the reaction rate in a fusion reactor or to focus the neutrons on special wall areas. Both options are useful to increase the energy output and...

84. THE STATUS OF THE DOUBLE POLARIZED DD-FUSION EXPERIMENT

Dr Polina Kravchenko (PNPI NRC Kurchatov institute)

12/09/2018, 15:05

Application of Nuclear Polarization Techniques to Other Fields

Parallel Sessions

A double-polarized dd-fusion experiment (PolFusion, PNPI, Gatchina) has been proposed to investigate the reactions d + d → 3He + n and d + d → t + p in the energy range of 10-100 keV. The possibility of using a vector and tensor polarized beam and target combination creates the opportunities to measure the asymmetry of the differential cross section and spin-correlation coefficients in the d +...

68. Status of polarized molecular source

Prof. Dmitriy Toporkov (Budker institute of nuclear physics, Novosibirsk State University)

12/09/2018, 15:30

Application of Nuclear Polarization Techniques to Other Fields

Parallel Sessions

An experimental setup to obtain polarized hydrogen and deuterium molecules is described. To separate the molecules with different magnetic moments superconducting sextupole magnets of a polarized atomic beam source with a magnetic pole-tip field of 34 kG and a field gradient of 32 kG/cm are used. Arguments explaining the choice of the location of the source elements are also given. To...

119. Optical excitation of molecules for Spin-Polarized Nuclear Fusion

Prof. T. Peter Rakitzis (IESL-FORTH)

12/09/2018, 16:40

Application of Nuclear Polarization Techniques to Other Fields

Parallel Sessions

It is known theoretically and from scattering experiments that nuclear spin polarization increases the cross sections of the D-T and D-3He reactions by 50%, while also spatially aligning the recoil directions of the reactions products, which can be used to improve the efficiency of reactors [1]. However, the lack of a sufficiently intense source of spin-polarized deuterium (SPD) has not yet...

87. Nuclear Polarization in Laser-induced Relativistic Plasmas

Prof. Markus Büscher (Forschungszentrum Jülich/PGI-6 and Heinrich Heine University Düsseldorf)

12/09/2018, 17:05

Application of Nuclear Polarization Techniques to Other Fields

Parallel Sessions

Laser-driven particle acceleration has undergone impressive progress in recent years. Nevertheless, one unexplored issue is how the particle spins are influenced by the huge magnetic fields inherently present in the plasmas. In the framework of the JuSPARC (Juelich Short-Pulse Particle and Radiation Center) facility and of the ATHENA consortium, the laser-driven generation of polarized proton...

166. Progress toward spin-polarized fusion: Performance of laser-polarized He-3 during permeation into tokamak pellets

Mr Sina Tafti (University of Virginia)

12/09/2018, 17:30

Application of Nuclear Polarization Techniques to Other Fields

Parallel Sessions

The possibility of spin-polarized fusion was introduced a few decades ago with the promise of a 50 % boost in the fusion cross section between Deuterium (D) and Tritium (T) in reaction D + T → He-5 → α + n. The same enhancement is expected in the isospin-mirrored fusion reaction, D + He-3 → Li-5 → α + p. This increase occurs if both nuclei fuse when their spins are parallel – i.e. fully...

93. General relativity experiment with frozen spin rings

Andras Laszlo (Wigner Research Centre for Physics of the Hungarian Academy of Sciences)

12/09/2018, 17:55

Application of Nuclear Polarization Techniques to Other Fields

Parallel Sessions

In a recent paper (https://doi.org/10.1088/1361-6382/aacfee), a general relativistic (GR) calculation was presented on the Earth's gravitational effect in a mixed magnetic-electric frozen spin storage ring on the spin transport. It was shown that GR causes a precession out of the orbital plane in a frozen spin ring, i.e. a slow vertical polarization buildup will be present, given that the...

203. Medical Imaging of Hyperpolarized Noble Gases: Perspectives and prospects at the quarter- century mark

Prof. Wilson Miller (University of Virginia)

13/09/2018, 14:30

Application of Nuclear Polarization Techniques to Other Fields

Parallel Sessions

The first biological magnetic resonance images of laser-polarized xenon-129 were published in 1994, in a seminal paper in Nature. In addition to the first proof-of-concept images in a mouse lung, this paper presented a variety of advanced human imaging possibilities ranging from simple ventilation imaging in the lung to dissolved-phase imaging of xenon-129 in the brain. Almost 25 years later,...

167. Medical application of spin-polarized noble gases: Emphysema index based on polarized He-3 and Xe-129 diffusion in the lung

Mr Sina Tafti (University of Virginia)

13/09/2018, 14:55

Application of Nuclear Polarization Techniques to Other Fields

Parallel Sessions

Over the past few decades, spin-polarized noble gases He-3 and Xe-129 have been used extensively as imaging media for magnetic resonance imaging (MRI) in medical research to characterize abnormalities in the lungs such as chronic obstructive pulmonary disease (COPD), which is the 4th leading cause of death worldwide. In particular, diffusion-weighted magnetic resonance imaging (DW-MRI) of...

100. Measuring the free neutron lifetime with spin-polarized ultracold neutrons at TRIGA Mainz

Prof. Dieter Ries (Institute of Nuclear Chemistry, Johannes Gutenberg University Mainz, Germany)

13/09/2018, 15:20

Application of Nuclear Polarization Techniques to Other Fields

Parallel Sessions

Ultracold Neutrons (UCN), neutrons with kinetic energies below 335 neV, provide a unique tool for fundamental neutron research with long observation times. The τSPECT experiment, which is currently being commissioned at the pulsed UCN source of the TRIGA Mainz, aims to utilize this fact in order to precisely measure the free neutron lifetime. In order to reduce systematic errors with...

158. Storage of polarized ultracold neutrons

Dr Guillaume Pignol (Université Grenoble Alpes)

13/09/2018, 15:45

Application of Nuclear Polarization Techniques to Other Fields

Parallel Sessions

Experiments searching for a permanent electric dipole moment of the neutron (nEDM) aim at discovering new sources of CP violation beyond the Standard Model of particle physics and understanding the origin of the matter-antimatter asymmetry of the Universe. In recent experiments, polarized ultracold neutrons are stored in material bottles, subject to a strong electric field and a weak stable...