On the possibility of a significant increase in the storage time of ultracold neutrons in traps coated with a liquid helium film
arXiv:2202.01499 · doi:10.1134/S0021364021200078
Abstract
It is shown that rough inner walls of a trap of ultracold neutrons can be coated with a superfluid helium film much thicker than the depth of penetration of ultracold neutrons into helium. This coating should reduce the rate of loss of ultracold neutrons caused by absorption in the walls of the trap by orders of magnitude. It is demonstrated that triangular roughness is more efficient than rectangular for the reduction of the rate of loss of ultracold neutrons. Triangular roughness is more easily implemented technically and such diffraction gratings are fabricated industrially. Other methods are proposed to increase the thickness of the protective helium film.
arXiv comment8 pages
References in corpus (24)
- An Improved Experimental Limit on the Electric Dipole Moment of the Neutron
- Electric dipole moments as probes of new physics
- Improved Determination of the Neutron Lifetime
- The neutron and its role in cosmology and particle physics
- New physics searches in nuclear and neutron decay
- Measurement of the Weak Axial-Vector Coupling Constant in the Decay of Free Neutrons Using a Pulsed Cold Neutron Beam
- Measurement of the neutron lifetime using an asymmetric magneto- gravitational trap and in situ detection
- Gravity Resonance Spectroscopy Constrains Dark Energy and Dark Matter Scenarios
- Low Energy Precision Test of Supersymmetry
- Neutron lifetime measurements with the big gravitational trap for ultracold neutrons
- Measurement of the Neutron Lifetime by Counting Trapped Protons in a Cold Neutron Beam
- Magnetic Trapping of Neutrons
- Neutron lifetime measurements using gravitationally trapped ultracold neutrons
- Determination of the Axial-Vector Weak Coupling Constant with Ultracold Neutrons
- Neutron lifetime measurement with pulsed cold neutrons
- New measurements of neutron electric dipole moment
- Improved limits on Fierz Interference using asymmetry measurements from the UCNA experiment
- Search for explanation of the neutron lifetime anomaly
- Neutron lifetime measurements and effective spectral cleaning with an ultracold neutron trap using a vertical Halbach octupole permanent magnet array
- A Composite Solution to the Neutron Bottle Anomaly
- Spectroscopy of ultracold neutrons using diffraction by a moving grating
- Spin flip loss in magnetic confinement of ultracold neutrons for neutron lifetime experiments
- Neutrons on a surface of liquid helium
- Helium film may greatly increase the storage time of ultracold neutrons in material traps
Cited by in corpus (3)
- Improving of ultracold neutron traps coated with liquid helium using capillarity and electric field
- A method for measuring deviation from Lambert diffuse scattering law of ultracold neutrons on material walls
- Numerical Calculation of Electric Field Enhancement in Neutron Traps with Rough Walls Coated with Superfluid Helium