Author: Y. MasudaPublisher:
ISBN:
Category :
Languages : en
Pages : 4
Book Description
Spallation Ultracold Neutron Production in Superfluid Helium
Author: Y. MasudaProduction and Storage of Ultra Cold Neutrons in Superfluid Helium
Author: Publisher:
ISBN:
Category :
Languages : en
Pages : 4
Book Description
This is the final report of a one-year, Laboratory Directed Research and Development (LDRD) project at the Los Alamos National Laboratory (LANL) concerning the investigation of a new method for the experimental exploitation of ultra-cold neutrons. The production and storage of ultra cold neutrons in superfluid helium has been suggested as a tool for the production of high densities of ultra cold neutrons for fundamental nuclear physics as well as for sensitive measurements for condensed matter. A particular application of this technique has been suggested by Doyle and Lamoreaux that involves the trapping of neutrons in a magnetic field within the superfluid helium volume. Neutron decays within the trap volume are detected by the scintillation light produced in the liquid helium. A cryostat and magnetic trap have been constructed as well as a prototype light detection system. This system was installed on a cold neutron beam line at the NIST Cold Neutron Research Facility in the summer of 1997. Preliminary results indicate the detection of helium scintillation light from the detection vessel.
Production of Ultracold Neutrons in Superfluid Helium Under Pressure
Author: Philipp Anton Schmidt-WellenburgPublisher:
ISBN:
Category :
Languages : en
Pages : 127
Book Description
Development of a New Superfluid Helium Ultra-cold Neutron Source and a New Magnetic Trap for Neutron Lifetime Measurements
Author: Kent Kwan Ho LeungSimulation Benchmarking and Equipment Characterization for the Ultracold Neutron Facility at TRIUMF
Author: Beryl BellPublisher:
ISBN:
Category :
Languages : en
Pages :
Book Description
"This thesis addresses a collection of analyses and simulations done on behalf of the TRIUMF Ul-traCold Advanced Neutron (TUCAN) collaboration in order to contribute to the development ofthe new UltraCold Neutron (UCN) source in an effort to increase the precision on the measurementof the neutron Electric Dipole Moment (nEDM) to10−27ecm. Within this range a non-zero nEDMwould verify physics beyond the standard model. In order to produce UCN, TUCAN combinesaccelerator driven spallation with a superfluid helium cryostat.The first chapter details the physics background required to understand how the UCN source worksand how the required precision for the nEDM measurement will be achieved. Additionally, it willintroduce PENTrack, the Monte Carlo simulation software which has been developed specificallyfor UCN and nEDM simulations. The second chapter introduces the experimental setup at TRI-UMF, including the proton beamline developed for this UCN source, the prototype source cryostatdeveloped at the Research Center for Nuclear Physics (RCNP) of the University of Osaka, and thenEDM spectrometer which is still under development. Additionally, it will cover briefly the typesof UCN experiments performed at TRIUMF in 2018, which are the main focus of this thesis, aswell as the two types of UCN detectors and how they operate. Chapter 3 covers the analysis ofthe 2018 run relevant to this work. During this run the relative responses of two detectors weremeasured. Furthermore, the total accumulated proton beam intensity on target during the 2018run was extracted from the data, followed by a verification of the correspondence of the TorodialNon-Intercepting Monitor (TNIM) reading with the extracted beam intensity. Chapter 4 is an intro-duction of a potential future experiment to be performed at the TRIUMF source in order to measurethe energy spectrum of the UCN produced in the source using a gravity spectrometer. During thepreparation for this experiment it was found that there were significant differences in measuredand simulated storage lifetimes in the spectrometer. Reasons for this discrepancy are discussedand paths of investigation are presented. Chapter 5 concludes the above work and summarizes theresults of this thesis and the work to follow"--
The Proceedings of the International Symposium on Nuclear Electro-Weak Spectroscopy for Symmetries in Electro-Weak Nuclear-Processes
Author: H. TokiPublisher: World Scientific
ISBN: 9789812381255
Category : Science
Languages : en
Pages : 380
Book Description
The NEWS99 international symposium discusses symmetries in electroweak processes in nuclei. Many phenomena in nuclear and particle physics are related to symmetry. It is known that we are living in a left-handed world as far as the Weak interaction is concerned, but neutrino physics suggests that a right-handed world may also be relevant. Chiral symmetry and its breaking plays an essential role in generating hadron masses. Symmetries related to flavor in the strong interaction like isospin, SU(3) and so on are known to be violated although they play a crucial role for the understanding of phenomena in nuclear and particle physics. The treatment of tiny breaking is of particular importance. Weak and electromagnetic interactions are well established at the fundamental level and can be used to probe the structure of nuclei and hadrons. A wide variety of phenomena in nuclear and particle physics were discussed in NEWS99 with an emphasis on symmetry. Topics ranged from nuclear structure to neutrino properties,,covering highly phenomenological to fundamental fields.
Fundamental Physics with Pulsed Neutron Beams
Author: Christopher R. GouldPublisher: World Scientific
ISBN: 9810246676
Category : Science
Languages : en
Pages : 268
Book Description
Low energy neutron beams are used to address many questions in nuclear physics, particle physics and astrophysics. The scientific issues include elucidating the nature of time reversal noninvariance; understanding the origin of the baryon asymmetry in the Universe; describing the weak interaction between quarks and between nucleons; understanding the origin of the elements in stellar and big bang nucleosynthesis.This book summarizes how spallation neutron sources work and discuss the advantages of pulsed beams in reducing systematic errors in precision measurements. It also describes recent breakthroughs in ultracold neutron production, together with the physics that will be addressed by the new generation of intense neutron sources.
Ultra-Cold Neutrons
Author: R. GolubPublisher: Routledge
ISBN: 1351406396
Category : Science
Languages : en
Pages : 328
Book Description
Ultra-Cold Neutrons is a complete, self-contained introduction and review of the field of ultra-cold neutron (UCN) physics. Over the last two decades, developments in UCN technology include the storage of UCN in material and magnetic bottles for time periods limited only by the beta decay rate of the free neutron. This capability has opened up the possibility of a wide range of applications in the fields of both fundamental and condensed state physics. The book explores some of these applications, such as the search for the electric dipole moment of the neutron that constitutes the most sensitive test of time reversal invariance yet devised. The book is suitable as an introduction to the field for research students, as a useful compendium of results and techniques for researchers, and is of general interest to nonspecialists in other areas of physics such as neutron, atomic, and fundamental physics and neutron scattering.
Ultra-Cold Neutrons
Author: R. GolubPublisher: CRC Press
ISBN: 9780750301152
Category : Science
Languages : en
Pages : 328
Book Description
Ultra-Cold Neutrons is a complete, self-contained introduction and review of the field of ultra-cold neutron (UCN) physics. Over the last two decades, developments in UCN technology include the storage of UCN in material and magnetic bottles for time periods limited only by the beta decay rate of the free neutron. This capability has opened up the possibility of a wide range of applications in the fields of both fundamental and condensed state physics. The book explores some of these applications, such as the search for the electric dipole moment of the neutron that constitutes the most sensitive test of time reversal invariance yet devised. The book is suitable as an introduction to the field for research students, as a useful compendium of results and techniques for researchers, and is of general interest to nonspecialists in other areas of physics such as neutron, atomic, and fundamental physics and neutron scattering.
News 99, Proceedings Of The International Symposium On Nuclear Electro-weak Spectroscopy For Symmetries In Electro-weak Nuclear-processes
Author: Kichiji HatanakaPublisher: World Scientific
ISBN: 9814487724
Category : Science
Languages : en
Pages : 372
Book Description
The NEWS 99 international symposium discusses symmetries in electroweak processes in nuclei. Many phenomena in nuclear and particle physics are related to symmetry. It is known that we are living in a left-handed world as far as the Weak interaction is concerned, but neutrino physics suggests that a right-handed world may also be relevant. Chiral symmetry and its breaking plays an essential role in generating hadron masses. Symmetries related to flavor in the strong interaction like isospin, SU(3) and so on are known to be violated although they play a crucial role for the understanding of phenomena in nuclear and particle physics. The treatment of tiny breaking is of particular importance. Weak and electromagnetic interactions are well established at the fundamental level and can be used to probe the structure of nuclei and hadrons.A wide variety of phenomena in nuclear and particle physics were discussed in NEWS 99 with an emphasis on symmetry. Topics ranged from nuclear structure to neutrino properties, covering highly phenomenological to fundamental fields.