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Measurement of Density Inhomogeneity for Source Masses in Time-of-Swing Method of Measuring G
| Content Provider | Scilit |
|---|---|
| Author | Lin-Xia, Liu Cheng-Gang, Shao Liang-Cheng, Tu Jun, Luo |
| Copyright Year | 2009 |
| Description | Journal: Chinese Physics Letters A method with scanning electron microscopy (SEM) is presented to measure the density inhomogeneity of the stainless steel (SS316) sphere prepared for measuring G using time-of-swing method. The experimental result shows that the relative density inhomogeneity of the sphere is better than 5.9 × $10^{−4}$ over the volume of 0.272 × 0.234 × 0.005 $mm^{3}$. If we assume that the density inhomogeneity of the spheres used in our G measurement is the same as that of the sphere destroyed in testing, it will contribute to G value with an uncertainty of less than 0.034 ppm in our G measurement. Furthermore, the mass centre offset from the geometric centre of the sphere will be less than 4.3 × $10^{−4}$ μm due to this inhomogeneity. |
| Related Links | http://iopscience.iop.org/article/10.1088/0256-307X/26/1/010403/pdf |
| ISSN | 0256307X |
| e-ISSN | 17413540 |
| DOI | 10.1088/0256-307x/26/1/010403 |
| Journal | Chinese Physics Letters |
| Issue Number | 1 |
| Volume Number | 26 |
| Language | English |
| Publisher | IOP Publishing |
| Publisher Date | 2009-01-01 |
| Access Restriction | Open |
| Subject Keyword | Journal: Chinese Physics Letters Density Inhomogeneity |
| Content Type | Text |
| Resource Type | Article |
| Subject | Physics and Astronomy |
