Next generation experiments to measure the neutron lifetime : Santa Fe, New Mexico 9-10 November 2012 / Susan J. Seestrom, editor ; Rhaimie Wahap, in-house editor.

Format:

Book

Conference/Event

Contributor:

Seestrom, Susan J., editor.

Rhaimie Wahap, editor.

Conference Name:

Next Generation Experiments to Measure the Neutron Lifetime Workshop

Language:

English

Subjects (All):

Neutrons--Congresses.

Neutrons.

Physical Description:

1 online resource (193 p.)

Place of Publication:

Singapore : World Scientific, 2014.

Language Note:

English

Summary:

There is a great interest in improving the limits on neutron lifetime to the level of a precision of 0.1 s. The neutron lifetime is both an important fundamental quantity as well as a parameter influencing important processes such as nucleosynthesis (Helium production in the early universe) and the rate of energy production in the Sun. Aiming to create a roadmap of R&D for a next generation neutron lifetime experiment that can be endorsed by the North American neutron community, the focus of the workshop was on experiments using traps that utilize ultracold neutrons and confinement by a combin

Contents:

Preface; Contents; Neutron Lifetime Theory; References; Neutron Lifetime Experiments Using the Beam Method: Past, Present, and Future; 1. Principles of the Beam Method; 2. Previous Beam Lifetime Experiments; 3. A Comparison of Recent Beam and Bottle Experiments; 4. A Path to a 0.1 s Neutron Lifetime Uncertainty Using the Beam Method; 5. Conclusions; Acknowledgements; References; Overview of Magnetic Trapping Neutron Lifetime Experiments; 1. Introduction; 2. Three-Dimensional Magnetic Confinement; 3. Gravito-Magnetic Traps; 4. Conclusions and Outlook; References

Some Thoughts Concerning the Statistics and Ultracold Neutron Source Requirements for the UCNτ Experiment1. Introduction; 2. UCN Sources; 3. Comments Concerning Loading a UCN Storage Lifetime Experiment; 4. Conclusions; Acknowledgements; References; Phase Space Evolution in Neutron Traps for Measurements of the Neutron Beta-Decay Lifetime; 1. Introduction; 2. Controlling Non- -decay Losses; 3. Qausi-Bound Neutrons; 4. Neutron Dynamics in the Phase Space; 5. Dynamics of the UCN in the UCN Apparatus; 5.1. Poincare's Section of Surface; 6. Summary; References

Chaos in a Gravo-Magneto Neutron TrapReferences; Stochastic Modeling and Simulation of Marginally Trapped Neutrons; 1. Introduction; 2. UCN Trajectory Model; 3. Stochastic Model for Marginally Trapped Neutrons; 3.1. Survival Probability; 3.2. Conditional Survival Probability; 3.3. Neutron Decay Signal; Acknowlegements; References; Spin Flip Loss in Magnetic Storage of Ultracold Neutrons; 1. Introduction; 2. Magnetic Field Distribution; 3. Basic Equations; 4. Depolarization in Magnetic Storage; 5. Conclusion; Acknowledgments; References

Vibration-Induced Loss of Ultra-Cold Neutrons in a Magneto-Gravitational Trap1. Introduction; 2. Simplified Model; 3. Parameter Sweep; 4. Spectral Random Walk; 5. Microphonic Vibration Measurements; 6. Discussion; 7. Conclusions; Acknowledgements; References; Blind Analysis in Physics Experiments: Is this Trip Necessary?; 1. Introduction; 2. The Case for Blind Analysis and some Counter-Arguments; 3. Discussion; References; A Technique for Determining Neutron Beam Fluence to 0.01% Uncertainty; 1. Introduction; 2. The Alpha-Gamma Technique; 3. Uncertainty Achieved With the Existing Devices

4. New Devices for a Measurement of Neutron Fluence to 0.01% Uncertainty5. Conclusions; References; A New Method of Neutron Detecton for UCN Lifetime Measurements; 1. Introduction; 2. Los Alamos UCN Lifetime Experiment; 2.1. Neutron Capture on Vanadium; 2.2. Los Alamos Lifetime Experiment; References; Measuring the Neutron Lifetime with Magnetically Trapped Ultracold Neutrons; 1. Introduction; 2. Apparatus; 3. Systematic Eects; 3.1. Marginally Trapped Neutrons; 3.2. 3He Purity; 3.3. Backgrounds; 4. Conclusions; References; UCNτ: Study of Lifetime Measurement in a Magneto-Gravitational Trap

1. Introduction

Notes:

Description based upon print version of record.

Includes bibliographical references at the end of each chapters.

Description based on online resource; title from PDF title page (ebrary, viewed April 8, 2014).

ISBN:

981-4571-67-9