New experimental technique for short-range gravity measurement

Ninomiya, K.; Akiyama, T.; Hata, Masayoshi; Ikeda, Yuki; Kawamura, H.; Narita, Keigo; Ogawa, Naruya; Sato, Takeru; Seitaibashi, E.; Sekiguchi, Yuta; Tsutsui, Ryosuke; Yazawa, Kazumasa; Murata, J.

doi:10.1088/1742-6596/189/1/012026

Cited by 3 publications

(1 citation statement)

References 3 publications

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“…Figure 1 shows the experimental apparatus 'Newton-II', designed to measure gravitational torque from attractors of different compositions on a torsion balance. The torque signal is obtained as the twisting angle of the torsion balance θ, which is visually monitored by a position sensor using an online digital-image-analysis system [16][17][18][19].…”

Section: Methodsmentioning

confidence: 99%

Short-range test of the universality of gravitational constant G at the millimeter scale using a digital image sensor

Ninomiya

Akiyama

Hata

et al. 2017

Class. Quantum Grav.

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The composition dependence of gravitational constant G is measured at the millimeter scale to test the weak equivalence principle, which may be violated at short range through new Yukawa interactions such as the dilaton exchange force. A torsion balance on a turning table with two identical tungsten targets surrounded by two different attractor materials (copper and aluminum) is used to measure gravitational torque by means of digital measurements of a position sensor. Values of the ratios and were and , respectively; these were obtained at a center to center separation of 1.7 cm and surface to surface separation of 4.5 mm between target and attractor, which is consistent with the universality of G. A weak equivalence principle (WEP) violation parameter of at the shortest range of around 1 cm was also obtained.

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Section: Methodsmentioning

confidence: 99%

Short-range test of the universality of gravitational constant G at the millimeter scale using a digital image sensor

Ninomiya

Akiyama

Hata

et al. 2017

Class. Quantum Grav.

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show abstract

Short-range Gravity experiment using digital image analysis

Ninomiya

Kishi

Murakami

et al. 2013

J. Phys.: Conf. Ser.

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Short-range test of the universality of gravitational constant $G$ at the millimeter scale using a digital image sensor

Ninomiya,

Akiyama,

Hata

et al. 2017

Preprint

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The composition dependence of gravitational constant G is measured at the millimeter scale to test the weak equivalence principle, which may be violated at short range through new Yukawa interactions such as the dilaton exchange force. A torsion balance on a turning table with two identical tungsten targets surrounded by two different attractor materials (copper and aluminum) is used to measure gravitational torque by means of digital measurements of a position sensor. Values of the ratios GAl−W / GCu−W − 1 and GCu−W /G N − 1 were (0.9 ± 1.1 sta ± 4.8 sys ) × 10 −2 and (0.2±0.9 sta ±2.1 sys )×10 −2 , respectively; these were obtained at a center to center separation of 1.7 cm and surface to surface separation of 4.5 mm between target and attractor, which is consistent with the universality of G. A weak equivalence principle (WEP) violation parameter of η Al−Cu (r ∼ 1 cm) = (0.9 ± 1.1 sta ± 4.9 sys ) × 10 −2 at the shortest range of around 1 cm was also obtained.

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New experimental technique for short-range gravity measurement

Cited by 3 publications

References 3 publications

Short-range test of the universality of gravitational constant G at the millimeter scale using a digital image sensor

Short-range test of the universality of gravitational constant G at the millimeter scale using a digital image sensor

Short-range Gravity experiment using digital image analysis

Short-range test of the universality of gravitational constant $G$ at the millimeter scale using a digital image sensor

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