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Sunday, August 9, 2020 | History

2 edition of The hyperfine frequency of potassium 39 in optically pumped gas cell frequency standards found in the catalog.

The hyperfine frequency of potassium 39 in optically pumped gas cell frequency standards

by John B. Carr

  • 105 Want to read
  • 21 Currently reading

Published .
Written in English

    Subjects:
  • Electronics

  • Edition Notes

    ContributionsNaval Postgraduate School (U.S.)
    The Physical Object
    Pagination1 v. :
    ID Numbers
    Open LibraryOL25160450M

    Caesium vapour magnetometer. The optically pumped caesium vapour magnetometer is a highly sensitive ( fT/Hz ) and accurate device used in a wide range of applications. It is one of a number of alkali vapours (including rubidium and potassium) that are used in this way.   The nonlinear magneto-optical rotation (NMOR) effect has prolific applications ranging from precision mapping of Earth’s magnetic field to biomagnetic sensing. Studies on collisional spin relaxation effects have led to ultrahigh magnetic field sensitivities using a single-beam Λ scheme with state-of-the-art magnetic shielding/compensation techniques. However, the NMOR effect in this widely Cited by: 7.

      We provide an overview on terahertz (THz) frequency metrology, starting from the nowadays available continuous wave THz sources, discussing their main features such as tunability, spectral purity, and frequency referencing to the primary frequency standards. A comparison on the achieved results in high-precision molecular spectroscopy is given and discussed, and finally, a Cited by: broadband pumping effects on the diode pumped alkali laser. thesis. paul nathaniel jones, civilian. afit/gap/enp/m department of the air force. air university. air force institute of technology. wright-patterson air force base, ohio. approved for public release; distribution is unlimitedFile Size: 3MB.

      The optical output of an alkali-metal inductively coupled plasma (alkali-ICP) plays an important role in both atomic magnetometers and atomic clocks, producing these devices’ atomic signals through optical pumping. Unfortunately, though the alkali-ICP’s optical pumping efficiency grows exponentially with temperature, at relatively high temperatures (∼ °C) the discharge transitions Cited by: 8. The operation of the sodium-potassium "pump" moves C) sodium ions into the cell and potassium ions out of the cell. D) sodium ions out of the cell and potassium ions into the cell. E) sodium and potassium ions into the mitochondria.


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The hyperfine frequency of potassium 39 in optically pumped gas cell frequency standards by John B. Carr Download PDF EPUB FB2

Thesis (MS)--U.S. Naval Postgraduate School, The hyperfine frequency of potassium 39 in optically pumped gas cell frequency : Abstract. Optically pumped gas cell frequency standards have been developed with long-term and short-term stabilities of one part in 10 „ The hyperfine transition frequency upon which the frequency standard is based is affected by certain factors which tend to shift the frequency, The effects of buffer gas pressure and temperature upon the hyperfine frequency of K-" were measured and Author: John B.

Carr. Enter the password to open this PDF file: Cancel OK. File name:. This option allows users to search by Publication, Volume and Page Selecting this option will search the current publication in context.

Book Search tips Selecting this option will search all publications across the Scitation platform Selecting this option will search all publications for the Publisher/Society in contextAuthor: J. Wan, H.

Bernstein. Laser diodes, optically narrowed using the technique of resonant optical feedback, have been frequency stabilised to hyperfine transitions of the two Rb D lines at nm and nm.

configuration [17, 18] to simultaneously record saturation and optical pumping hyperfine transitions of 39K with interferograms as short as 5 µs. A schematic of the sub-Doppler direct frequency comb spectrometer can be found in Fig. The laser source was an external-cavity diode laser with a linewidth less than kHz (at 1 ms).

presence of a buffer gas. The cell diameters are cm and their lengths are cm, and we employ low laser powers to limit distortions of the spectra due to optical pumping (on the order of nW). The relative absorption cross section in both cells, (), is estimated using Beer’s law: N ()L = ln[I()/I.

KEYWORDS: Modulation, Argon, Chemical species, Coating, Magnetism, Semiconductor lasers, Optical pumping, Cesium, Magnetometers, Absorption Read Abstract + A simple set-up for observation of CPT effect at single hyperfine ground state excitation has been examined for application in measurements of non-vanishing magnetic fields.

The hyperfine (microwave) magnetic-resonance frequencies of optically pumped alkali-metal atoms in buffer-gas have long been used in compact, portable frequency standards.

The buffer gas is needed. The more preferred candidates for frequency standards are Al in ion trap and neutral lattice clocks of K gas cell, the laser beam diameter is estimated to be about cell containing natural potassium (consisting of % of 39 K(I=3/2),%of40 4)and%of41K(I=3/2))Cited by: 1.

Introduction. An alkali-metal vapour cell is the core of an atomic clock based on a coherent population trapping (CPT) recent demand for smaller atomic CPT clocks, and their mass production poses new demands on the technologies of miniaturised gas cells.

The most important are requirements of repeatable CPT resonance parameters and the cell dimensions, as well as those Cited by: 2.

potassium (K), where the hyperfine transitions are strongly overlapped. Magnetically unshielded, 8-mm-long cell information storage [5], frequency standards [6], and precise magnetometers [7]. the problem with the hf optical pumping because in -level frequency difference (of MHz) is much less than the Doppler width of.

Abstract. We present the design of a compact absolute optical frequency reference for space applications based on hyperfine transitions in molecular iodine with a targeted fractional frequency instability of better than 3 × 10 −14 after 1 s.

It is based on a micro-integrated extended cavity diode laser with integrated optical amplifier, fiber pigtailed second harmonic generation wave-guide Cited by:   The end-resonance clock uses strong hyperfine end transition to stabilize the frequency of the local oscillator.

Comparing to the conventional atomic clock, end resonance has very small spin-exchange broadening effect.

The spin-exchange rate is proportional to the number density of the alkali-metal atoms. By using the end resonance, we are able to use very high dense vapor to obtain a. gas cell inside a build-up cavity. The measured absorption dip has 3% line contrast and MHz linewidth.

Both the atomic and molecular saturated lines are very well suited for frequency locking in order to establish accurate frequency standards in the optical communication band. Index Terms— m, acetylene, erbium, frequency stability. Revised by Fredrick Matos, in Reference Data for Engineers (Ninth Edition), Rubidium Oscillators.

Rubidium oscillators are the lowest priced members of the atomic oscillator family. They operate at 6 Hz, the resonance frequency of the rubidium atom (87 Rb), and use the rubidium frequency to control the frequency of a quartz oscillator.A microwave signal derived from the.

as the pump beam and induced the necessary optical cycling. Comb tooth spacings as narrow as 20 kHz were used to probe potassium in both buffer gas and evacuated cells at elevated temperatures.

Atomic absorption features as narrow as 33(5) kHz were observed allowing for the 39K lower state hyperfine splitting to be opticallyCited by: 9. Various topics will be covered: the SERF operation, the role of spin-exchange collisions, fundamental and technical noises in SERF and other high-density magnetometers, light shifts, optical pumping.

The formalism of density matrix equations will be briefly described with some by: 4. A relative cell reference is one that changes when a formula is copied. It has no dollar symbols in it.

There are 3 types of cell reference: Relative, Mixed and Absolute. Mössbauer spectroscopy is a spectroscopic technique based on the Mössbauer effect, discovered by Rudolf Mössbauer (sometimes written "Moessbauer", German: "Mößbauer") inconsists of the nearly recoil-free emission and absorption of nuclear gamma rays in consequent nuclear spectroscopy method is exquisitely sensitive to small changes in the chemical.

ultimately the sodium potassium pump in the cell will fail because of lack of. what negative affect regarding gas diffusion in the alveoli would a patient with pulmonary edema suffer from.

x frequency of ventilation. inadequate ventilation and hypoxia can occur from.Theoretical Overview of Rubidium Frequency Standards. Stanford Research Systems. April 9, Rubidium is an alkali metal (like lithium, sodium, potassium and cesium). There are two naturally occurring isotopes of rubidium, Rb85 and Rb87, which have relative abundances of 72% and 28% respectively.

The metal has a melting point of 39 °[email protected]{osti_, title = {Laser pumping in the scheme of an Mx-magnetometer}, author = {Aleksandrov, E B and Balabas, M V and Ivanov, A E}, abstractNote = {This paper is devoted to the development of monochromatic radiation sources based on injection lasers intended for optical pumping of alkali metal vapors used in quantum magnetometry.