scholarly journals Studies of Systematic Limitations in the EDM Searches at Storage Rings

2016 ◽  
Vol 40 ◽  
pp. 1660093 ◽  
Author(s):  
Artem Saleev ◽  
Nikolai Nikolaev ◽  
Frank Rathmann
Keyword(s):  
Dipole Moment ◽  
Magnetic Dipole ◽  
Electric Dipole Moment ◽  
Electric Dipole ◽  
Magnetic Dipole Moment ◽  
Original Method ◽  
Spin Rotation ◽  
Systematic Effect ◽  
Systematic Effects ◽  
Magnetic Ring

Searches of the electric dipole moment (EDM) at a pure magnetic ring, like COSY, encounter strong background coming from magnetic dipole moment (MDM). The most troubling issue is the MDM spin rotation in the so-called imperfection, radial and longitudinal, B-fields. To study the systematic effects of the imperfection fields at COSY we proposed the original method which makes use of the two static solenoids acting as artificial imperfections. Perturbation of the spin tune caused by the spin kicks in the solenoids probes the systematic effect of cumulative spin rotation in the imperfection fields all over the ring. The spin tune is one of the most precise quantities measured presently at COSY at [Formula: see text] level. The method has been successfully tested in September 2014 run at COSY, unravelling strength of spin kicks in the ring’s imperfection fields at the level of [Formula: see text].

scholarly journals Estimation of Systematic Errors for Deuteron Electric Dipole Moment Search at COSY

2016 ◽  
Vol 40 ◽  
pp. 1660099 ◽  
Author(s):  
Stanislav Chekmenev
Keyword(s):  
Dipole Moment ◽  
Charged Particle ◽  
Experimental Method ◽  
Electric Dipole Moment ◽  
Electric Dipole ◽  
Systematic Errors ◽  
Great Level ◽  
Spin Motion ◽  
Wien Filter ◽  
Systematic Effects

An experimental method which is aimed to find a permanent EDM of a charged particle was proposed by the JEDI (Jülich Electric Dipole moment Investigations) collaboration. EDMs can be observed by their influence on spin motion. The only possible way to perform a direct measurement is to use a storage ring. For this purpose, it was decided to carry out the first precursor experiment at the Cooler Synchrotron (COSY). Since the EDM of a particle violates CP invariance it is expected to be tiny, treatment of all various sources of systematic errors should be done with a great level of precision. One should clearly understand how misalignments of the magnets affects the beam and the spin motion. It is planned to use a RF Wien filter for the precusor experiment. In this paper the simulations of the systematic effects for the RF Wien filter device method will be discussed.

The Microwave Spectrum of Cyanogen Iodide-15N: Hyperfine Structure and Electric Dipole Moment Investigated by Microwave Fourier Transform Spectroscopy

1988 ◽  
Vol 43 (2) ◽  
pp. 133-137 ◽  
Author(s):  
Joachim Gripp ◽  
Helmut Dreizler
Keyword(s):  
Fourier Transform ◽  
Dipole Moment ◽  
Electric Dipole Moment ◽  
Electric Dipole ◽  
Stark Effect ◽  
Rotational Transition ◽  
Microwave Spectrum ◽  
Spin Rotation ◽  
Coupling Parameters ◽  
Cyanogen Iodide

The first rotational transition of cyanogen iodide-15N (IC15N) has been investigated by microwave Fourier transform (MWFT) Stark effect spectroscopy to determine the electric dipole moment. In addition the first four rotational transitions have been measured by MWFT spectroscopy to obtain accurate parameters for the rotational, quadrupole and spin-rotation coupling parameters.

scholarly journals nEDM experiment at PSI: Data-taking strategy and sensitivity of the dataset

2019 ◽  
Vol 219 ◽  
pp. 02001 ◽  
Author(s):  
C. Abel ◽  
N.J. Ayres ◽  
G. Ban ◽  
G. Bison ◽  
K. Bodek ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Dipole Moment ◽  
Electric Dipole Moment ◽  
Electric Dipole ◽  
Neutron Electric Dipole Moment ◽  
Systematic Effects ◽  
Paul Scherrer ◽  
Coherent Picture ◽  
The Magnetic Field ◽  
Better Than

We report on the strategy used to optimize the sensitivity of our search for a neutron electric dipole moment at the Paul Scherrer Institute. Measurements were made upon ultracold neutrons stored within a single chamber at the heart of our apparatus. A mercury cohabiting magnetometer together with an array of cesium magnetometers were used to monitor the magnetic field, which was controlled and shaped by a series of precision field coils. In addition to details of the setup itself, we describe the chosen path to realize an appropriate balance between achieving the highest statistical sensitivity alongside the necessary control on systematic effects. The resulting irreducible sensitivity is better than 1 × 10−26e cm. This contribution summarizes in a single coherent picture the results of the most recent publications of the collaboration.

The Rotational Zeeman Effect of Methyl-and Silylbromide

1979 ◽  
Vol 34 (4) ◽  
pp. 469-481
Author(s):  
K.-F. Dössel ◽  
D. H. Sutter
Keyword(s):  
Dipole Moment ◽  
High Resolution ◽  
Electric Dipole Moment ◽  
Electric Dipole ◽  
Zeeman Effect ◽  
Spin Rotation ◽  
Coupling Constants

The rotational Zeeman effect of the J→J' = 0→1, K = 0 transition has been investigated for CH381Br and SiH381Br under high resolution. The shielding constant for the 81Br-nucleus in these molecules has been determined from the spectra and is compared to the values calculated from the spin-rotation coupling constants. The sign of the electric dipole moment in SiHßBr is shown to be ⊕H3SiBr⊕. From the Zeeman effect of two K ≠ 0 transitions of SiH3Br, g|| is determined to be negative for SiHaBr, in contrast to CH3Br, where g|| is positive

scholarly journals Measurement of the neutron electric dipole moment via spin rotation in a non-centrosymmetric crystal

2010 ◽  
Vol 694 (1) ◽  
pp. 22-25 ◽  
Author(s):  
V.V. Fedorov ◽  
M. Jentschel ◽  
I.A. Kuznetsov ◽  
E.G. Lapin ◽  
E. Lelièvre-Berna ◽  
...  
Keyword(s):  
Dipole Moment ◽  
Electric Dipole Moment ◽  
Electric Dipole ◽  
Spin Rotation ◽  
Neutron Electric Dipole Moment
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