Presentation
Preliminary Results from the UCNτ Experiment
American Physical Society Meeting
(2017)
Abstract
There is currently a 4σ discrepancy between measurements of the neutron lifetime performed using cold neutron beams and those performed with ultracold neutron (UCN) storage vessels. The UCNτ experiment uses an asymmetric magneto-gravitational UCN trap with {\it in situ} counting of surviving neutrons to measure the neutron lifetime. This design eliminates a major systematic of previous bottle experiments related to the loss of UCN on material trap walls and with unloading neutrons from the storage vessel. A new {\it in situ} detection system was used in the 2015-2016 run that was able to measure the population of surviving UCN at different heights in the trap, providing important information on spectral evolution. Understanding the behavior of quasi-bound UCN in a bottle experiment is essential to achieving a subsecond precision measurement of τn. We will present the preliminary results from the 2015-2016 data set and an update on the UCNτ experiment.
Keywords
- Preliminary Results,
- UCNτ Experiment
Disciplines
Publication Date
January 29, 2017
Location
Washington DC
Comments
Presentation originally available in the American Physical Society Meeting.
Citation Information
Robert W. Pattie. "Preliminary Results from the UCNτ Experiment" American Physical Society Meeting (2017) Available at: http://works.bepress.com/robert-pattie/49/