Effect of a Constant Magnetic Field on the Neutron Beta Decay Rate and its Astrophysical Implications

Nature ◽  
1969 ◽  
Vol 222 (5194) ◽  
pp. 649-650 ◽  
Author(s):  
R. F. O'CONNELL ◽  
J. J. MATESE
Keyword(s):  
Magnetic Field ◽  
Decay Rate ◽  
Beta Decay ◽  
Constant Magnetic Field ◽  
Neutron Beta Decay

Neutron Beta Decay in a Uniform Constant Magnetic Field

1969 ◽  
Vol 180 (5) ◽  
pp. 1289-1292 ◽  
Author(s):  
J. J. Matese ◽  
R. F. O'Connell
Keyword(s):  
Magnetic Field ◽  
Beta Decay ◽  
Constant Magnetic Field ◽  
Neutron Beta Decay

Neutron Beta Decay in a Strong Magnetic Field

1969 ◽  
Vol 187 (5) ◽  
pp. 2141-2146 ◽  
Author(s):  
L. FASSIO-CANUTO
Keyword(s):  
Magnetic Field ◽  
Strong Magnetic Field ◽  
Beta Decay ◽  
Neutron Beta Decay

A CMT Device for Electric Energy Meter Detection

2020 ◽  
Vol 13 ◽  
Author(s):  
Zhi Zeng ◽  
Yongfu Zhou
Keyword(s):  
Magnetic Field ◽  
Constant Magnetic Field ◽  
Electromagnetic Interference ◽  
Production Efficiency ◽  
Electric Energy ◽  
Labor Cost ◽  
Automatic Testing ◽  
National Standard ◽  
Measurement Instruments ◽  
Detection Technology

Background: Detection technology is a product development technique that serves as a basis for quality assurance. As electric energy meters (EEMs) are measurement instruments whose use is mandatory in several nations, their accuracy, which directly depends on their reliability and proper functioning, is paramount. In this study, to eliminate electromagnetic interference, a device is developed for testing a set of EEMs under a constant magnetic field interference. The detection device can simultaneously test 6 electric meters; moreover, in the future, it will be able to measure the influence of magnetic field strength on the measurement accuracy of EEMs, thereby improving the production efficiency of electric meter manufacturers. Methods: In this study, we first design a 3D model of the detection device for a single meter component; then, we establish a network, which includes a control system, and perform the planning of the path of a block that generates a constant magnetic field. Finally, we control the three-axis motion and rotation of the block using a PLC to implement detection for the five sides of the EEM. Results & Discussion: The proposed device can accurately determine whether an EEM can adequately function, within the error range prescribed by a national standard, under electromagnetic interference; this can enable reliable, automatic testing and fault detection for EEMs. Experiments show that our device can decrease the labor cost for EEM manufacturers.

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