Coriolis effect is an important error source in the weak equivalence principle(WEP)test using atom interferometer.In this paper,the problem of Coriolis error in WEP test is studied theoretically and experimentally.In ...Coriolis effect is an important error source in the weak equivalence principle(WEP)test using atom interferometer.In this paper,the problem of Coriolis error in WEP test is studied theoretically and experimentally.In theoretical simulation,the Coriolis effect is analyzed by establishing an error model.The measurement errors of Eotvos coefficient(η)in WEP test related to experimental parameters,such as horizontal-velocity difference and horizontal-position difference of atomic clouds,horizontal-position difference of detectors,and rotation compensation of Raman laser’s mirror are calculated.In experimental investigation,the position difference between^85Rb and^87Rb atomic clouds is reduced to 0.1 mm by optimizing the experimental parameters,an alternating detection method is used to suppress the error caused by detection position difference,thus the Coriolis error related to the atomic clouds and detectors is reduced to 1.1 × 10^-9.This Coriolis error is further corrected by com pensating the rotation of Raman laser's mirror,and the total uncertainty o f rj measurement related to the Coriolis effect is reduced as δη=4.4 × 10^-11.展开更多
To the Editor:A 68-year-old man presented with a 2-month aphasia.Magnetic resonance imaging scan revealed an abnormal signal in the left temporal lobe with heterogenous enhancement[Figure 1A].Glioma was considered,and...To the Editor:A 68-year-old man presented with a 2-month aphasia.Magnetic resonance imaging scan revealed an abnormal signal in the left temporal lobe with heterogenous enhancement[Figure 1A].Glioma was considered,and the patient underwent total tumor resection.Microscopic examination of the resected tumor showed a high-grade glial tumor with pleomorphic cells,elevated mitotic activity,microvascular proliferation,and pseudopalisading necrosis[Figure 1B and Figure 1C].Part of the lesion contained round cells with perinuclear halos.展开更多
基金Project supported by the National Key Research and Development Program of China(Grant No.2016YFA0302002)the National Natural Science Foundation of China(Grant Nos.91736311 and 11574354)+1 种基金Strategic Priority Research Program of the Chinese Academy of Sciences(Grant No.XDB21010100)the Youth Innovation Promotion Association of the Chinese Academy of Sciences(Grant No.2016300).
文摘Coriolis effect is an important error source in the weak equivalence principle(WEP)test using atom interferometer.In this paper,the problem of Coriolis error in WEP test is studied theoretically and experimentally.In theoretical simulation,the Coriolis effect is analyzed by establishing an error model.The measurement errors of Eotvos coefficient(η)in WEP test related to experimental parameters,such as horizontal-velocity difference and horizontal-position difference of atomic clouds,horizontal-position difference of detectors,and rotation compensation of Raman laser’s mirror are calculated.In experimental investigation,the position difference between^85Rb and^87Rb atomic clouds is reduced to 0.1 mm by optimizing the experimental parameters,an alternating detection method is used to suppress the error caused by detection position difference,thus the Coriolis error related to the atomic clouds and detectors is reduced to 1.1 × 10^-9.This Coriolis error is further corrected by com pensating the rotation of Raman laser's mirror,and the total uncertainty o f rj measurement related to the Coriolis effect is reduced as δη=4.4 × 10^-11.
基金This work was supported by the Beijing Excellent Talents Training Project,China(No.201600026833ZK07)the Beijing Higher Education Young Elite Teacher Project,China(No.CIT&TCD201904091)。
文摘To the Editor:A 68-year-old man presented with a 2-month aphasia.Magnetic resonance imaging scan revealed an abnormal signal in the left temporal lobe with heterogenous enhancement[Figure 1A].Glioma was considered,and the patient underwent total tumor resection.Microscopic examination of the resected tumor showed a high-grade glial tumor with pleomorphic cells,elevated mitotic activity,microvascular proliferation,and pseudopalisading necrosis[Figure 1B and Figure 1C].Part of the lesion contained round cells with perinuclear halos.
