Progress Towards A Permanent Octupole Magnetic Ultra-Cold Neutron Trap for Lifetime Measurements
نویسنده
چکیده
Current knowledge of the neutron β-decay lifetime has come under scrutiny as of late due to large disagreements between recent precise measurements. Measurements using magnetically trapped Ultra-Cold Neutrons (UCNs) offer the possibility of storage without spurious losses which can provide a reliable value for the neutron lifetime. The progress towards realizing a neutron lifetime measurement using a Ioffe-type trap made with a Halbach-type permanent octupole magnet is presented here. The experimental procedure extracts into vacuum UCNs produced from a superfluid helium converter and detects the neutron decays via in-situ detection of produced protons.
منابع مشابه
Determination of the Neutron Lifetime Using Magnetically Trapped Neutrons
We report progress on an experiment to measure the neutron lifetime using magnetically trapped neutrons. Neutrons are loaded into a 1.1 T deep superconducting Ioffe-type trap by scattering 0.89 nm neutrons in isotopically pure superfluid (4)He. Neutron decays are detected in real time using the scintillation light produced in the helium by the beta-decay electrons. The measured trap lifetime at...
متن کاملRegular and chaotic motion of anti-protons through a nested Penning trap with multipole magnetic fields
The next generation of experiments for making cold anti-hydrogen will attempt to trap them using multipole magnetic fields. We investigate the motion of the anti-protons through the combined electric and magnetic fields of this type of trap. The multipole fields that will prevent the anti-hydrogen from hitting the walls cause the anti-protons to have regions of regular motion and regions of cha...
متن کاملA Superconducting Magnet UCN Trap for Precise Neutron Lifetime Measurements
Finite-element methods along with Monte Carlo simulations were used to design a magnetic storage device for ultracold neutrons (UCN) to measure their lifetime. A setup was determined which should make it possible to confine UCN with negligible losses and detect the protons emerging from β-decay with high efficiency: stacked superconducting solenoids create the magnetic storage field, an electro...
متن کاملOn the Measurement of the Neutron Lifetime Using Ultracold Neutrons in a Vacuum Quadrupole Trap
We present a conceptual design for an experiment to measure the neutron lifetime (~886 s) with an accuracy of 10(-4). The lifetime will be measured by observing the decay rate of a sample of ultracold neutrons (UCN) confined in vacuum in a magnetic trap. The UCN collaboration at Los Alamos National Laboratory has developed a prototype UCN source that is expected to produce a bottled UCN density...
متن کاملTrapping of Molecular Oxygen together with Lithium Atoms.
We demonstrate simultaneous deceleration and trapping of a cold atomic and molecular mixture. This is the first step towards studies of cold atom-molecule collisions at low temperatures as well as application of sympathetic cooling. Both atoms and molecules are cooled in a supersonic expansion and are loaded into a moving magnetic trap that brings them to rest via the Zeeman interaction from an...
متن کامل