Stanford PNT hollberg Nov07 b - Stanford Center for Position ...

More documents

Recommendations

Info

CSAM Sensitivity Comparison Adapted from R. L. Fagaly, Rev. Sci. Instrum., 77 (2006). SQUID Susceptometry Geophysical Magnetocardiography Transient Electromagnetics Magnetic Anomaly Detection Non-Destructive Test and Evaluation 2004 Magnetoencephalography 87 Rb, 1 mm 3 atom shot noise 2006 2005 High Tc SQUID Low Tc SQUID
Nuclear Spin Gyroscopes • Much work in 1970s and 1980s – Fraser (1963), Bayley, Greenwood, Simpson (1973) – Commercial development: Litton, Singer-Kearfott, TI Alkali atom Spin Exchange 129 Xe S (V) Noble gas atom Lock In signal Fit includes linear drift f=y0+c*x+a*exp(-x/d)*cos(2*3.14159265359*x/b) -0.2 -0.3 -0.4 -0.5 -0.6 -0.7 1e-1 1e-2 1e-3 1e-4 T 2 ~ 6 s -0.8 0 5 10 15 20 t (s) FFT of Lock-In Signal ! = 100 us, S=200 mV Ω R M ng 1 B 0 M Al N B0N R B ! ! + " 0 ΔB 1 ΔB 2 100 µs 58 ms Time PD
Page 1 and 2: Sundial Atoms and Lasers for Precis
Page 3 and 4: Accuracy of clocks through history
Page 5 and 6: Current Microwave-Based Standards a
Page 7 and 8: Relative position, dimensional metr
Page 9 and 10: Feedback System Locks LO to atomic
Page 11 and 12: Laser source Ca Oven Optical Atomic
Page 13 and 14: Fractional Frequency Uncertainty 1.
Page 15 and 16: 1 P1 (6s6p) Atom number [a.u.] Ytte
Page 17 and 18: Feedback System Locks LO to atomic
Page 19 and 20: Count Optical Frequencies with Opti
Page 21 and 22: The frequency of a mode is simply F
Page 23 and 24: Hg + ~1 fs per tooth Mechanical Ana
Page 25 and 26: Optical reference f opt M3 I(f) PUM
Page 27 and 28: Source Lab Laser Source 563 nm line
Page 29 and 30: Next generation Grace laser ranging
Page 31 and 32: Chip Scale Atomic Devices CSAC (clo
Page 33 and 34: 4.2 mm 1.5 mm NIST Chip-Scale Atomi
Page 35 and 36: (A Very Rough) Oscillator Compariso
Page 37 and 38: ? GPS Positioning with < 4 τ 3 τ
Page 39 and 40: Magnetometry with Chip-Scale Device
Page 41 and 42: Heater Currents Laser Current Local
Page 43: Magnetocardiography with a CSAM •

Stanford PNT hollberg Nov07 b - Stanford Center for Position ...

Create successful ePaper yourself

Delete template?

Save as template?