Spectrometer for new gravitational experiment with UCN

(2) Institut Lauer-Langevin; 3); (3) Institute for Nuclear Research; (4) Institute of General; (5) Moscow State University; A.I. Frank (1); A.N. Strepetov (4); Dubna; D.V. Kustov (1; France

Spectrometer for new gravitational experiment with UCN

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arxiv 1502.03243 v1 pith:VX4SMGWK submitted 2015-02-11 physics.ins-det nucl-ex

G.V. Kulin (1) , A.I. Frank (1) , S.V. Goryunov (1) , D.V. Kustov (1 , 3) , P. Geltenbort (2) , M. Jentschel (2) , A.N. Strepetov (4)

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V.A. Bushuev (5) ((1) Joint Institute for Nuclear Research Dubna Russia (2) Institut Lauer-Langevin Grenoble France (3) Institute for Nuclear Research Kiev Ukraine (4) Institute of General Nuclear Physics RCC Kurchatov Institute Moscow (5) Moscow State University Russia)

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classification physics.ins-detnucl-ex

keywords deviceallowingenergyequivalencegravitationalneutronneutronsspectrometer

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abstract

We describe an experimental installation for a new test of the weak equivalence principle for neutron. The device is a sensitive gravitational spectrometer for ultra-cold neutrons allowing to precisely compare the gain in kinetic energy of free falling neutrons to quanta of energy ${\hbar}{\Omega}$ transferred to the neutron via a non stationary device, i.e. a quantum modulator. The results of first test experiments indicate a collection rate allowing measurements of the factor of equivalence $ { \gamma}$ with a statistical uncertainty in the order of $5{\times}10^{-3}$ per day. A number of systematic effects were found, which partially can be easily corrected. For the elimination of others more detailed investigations and analysis are needed. Some possibilities to improve the device are also discussed.

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Landau levels in a gravitational field: The Schwarzschild spacetime case
gr-qc 2019-09 conditional novelty 5.0 of 10

In Schwarzschild spacetime, a weak gravitational field splits Landau levels by an amount proportional to GMm times the square root of the magnetic field, with explicit Yukawa, power-law, and relativistic corrections derived.

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