Improved linear ion trap physics package
John D. Prestage,Robert L. Tjoelker,G.J. Dick,Lutfollah Maleki +3 more
- 02 Jun 1993
- pp 144-147
TL;DR: In this paper, the authors describe an improvement in the architecture of the physics package used in the linear ion trap (LIT) based frequency standard developed at the Jet Propulsion Laboratory.
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Abstract: The authors describes an improvement in the architecture of the physics package used in the linear ion trap (LIT) based frequency standard developed at the Jet Propulsion Laboratory. This new design is based on the observation that ions can be moved along the axis of an LIT by applied DC voltages. The state selection/interrogation region can be separated from the more critical microwave resonance region where the multiplied local-oscillator signal is compared to the stable atomic transition. This separation relaxes many of the design constraints of the present units. Improvements include increased frequency stability, and a substantial reduction in size, mass, and cost of the final frequency standard. >
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•Posted Content
Transport of Quantum States and Separation of Ions in a Dual RF Ion Trap
M. A. Rowe,A. Ben-Kish,Brian DeMarco,Dietrich Leibfried,V. Meyer,J. A. Beall,Joseph W. Britton,John P. Hughes,Wayne M. Itano,Branislav M. Jelenkovic,Christopher Langer,Till Rosenband,David J. Wineland +12 more
TL;DR: Ion dynamics associated with a dual linear ion trap where ions can be stored in and moved between two distinct locations are investigated and the unit cell in a strategy for scalable quantum computing using a series of interconnected ion traps is identified.
136
A mercury ion frequency standard engineering prototype for the NASA deep space network
Robert L. Tjoelker,C. Bricker,W.A. Diener,R. Hamell,A. Kirk,P. F. Kuhnle,Lutfollah Maleki,John D. Prestage,D. Santiago,D.J. Seidel,D.A. Stowers,Richard L. Sydnor,T. Tucker +12 more
- 05 Jun 1996
TL;DR: An engineering prototype linear ion trap frequency standard (LITS-4) using /sup 199/Hg/sup +/ is operational and currently under test for NASA's Deep Space Network (DSN).
45
Recent Developments in Microwave Ion Clocks
John D. Prestage,Robert L. Tjoelker,Lute Maleki +2 more
- 01 Jan 2001
TL;DR: In this article, a review of the development of microwave-frequency standards based on trapped ions is presented, including linear Paul traps, quadrupole traps, and multipole traps.
33
The Evolution of Technology in the Deep Space Network: A History of the Advanced Systems Program
J. W. Layland,L. L. Rauch +1 more
- 15 Nov 1994
TL;DR: Some of the many contributions of the DSN Advanced Systems Program that were provided to DSN Engineering and Implementation are explored, including not only the world's best deep-space communications system, but also outstanding competency in the fields of radio metric measurement, radar and radio astronomy, and radio science.
25
Recent stability comparisons with the JPL linear trapped ion frequency standards
Robert L. Tjoelker,John D. Prestage,G.J. Dick,Lutfollah Maleki +3 more
- 01 Jun 1994
TL;DR: The /sup 202/Hg lamp is used for state selection and a helium buffer gas for ion cooling as mentioned in this paper, and a preliminary 9 day comparison between the trapped ion standards, the Allan deviation was /spl sigma/sub y/(/spl tau/)=1/spl times/10/sup -13///spl tAU//sup 1/2/ and a fractional frequency stability of 6/spltimes/10 /sup -16/ measured for averaging times greater than 10/sup 5/ seconds.
15
References
New ion trap for frequency standard applications
TL;DR: In this paper, a linear ion trap was designed to store a large number of ions with reduced susceptibility to the second-order Doppler effect caused by the rf confining fields.
257
Thermalization of199Hg ion macromotion by a light background gas in an RF quadrupole trap
TL;DR: In this paper, the authors present evidence that cooling the ions by collisions with atoms of a background gas light compared to the ions results in the condensation of the ions into a cloud of almost uniform density determined by space charge versus potential well forces.
104
Long term stability of Hg/sup +/ trapped ion frequency standards
Robert L. Tjoelker,John D. Prestage,G.J. Dick,Lute Maleki +3 more
- 02 Jun 1993
TL;DR: In this paper, the authors report the development of a second /sup 199/Hg/sup +/ linear ion trap (LIT) based frequency standard to provide a capability for measuring stability beyond all existing frequency standards.
42
Ultra-stable Hg/sup +/ trapped ion frequency standard
John D. Prestage,Robert L. Tjoelker,G.J. Dick,Lute Maleki +3 more
- 29 May 1991
TL;DR: In this paper, a fieldable frequency standard based on /sup 199/Hg/sup +/ ions confined in a hybrid RF/DC linear ion trap was proposed, which allowed storage of large numbers of ions with reduced susceptibility to the second-order Doppler effect caused by the RF confining fields.
19
Hg/sup +/ trapped ion standard performance with the superconducting cavity maser oscillator as LO
John D. Prestage,Robert L. Tjoelker,Rabi T. Wang,G.J. Dick,Lute Maleki +4 more
- 27 May 1992
TL;DR: In this article, the frequency stability obtained with an ion-trap-based frequency standard where /sup 199/Hg/sup +/ ions are confined in a hybrid RF/DC linear trap is described.
12
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