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Precision spectroscopy of circular Rydberg states of hydrogen

IP.com Disclosure Number: IPCOM000128040D
Original Publication Date: 1998-Dec-31
Included in the Prior Art Database: 2005-Sep-14
Document File: 5 page(s) / 19K

Publishing Venue

Software Patent Institute

Related People

Holley, Jeffrey R: AUTHOR [+3]

Related Documents

http://theses.mit.edu:80/Dienst/UI/2.0/Describe/0018.mit.theses/1998-288: URL

Abstract

The Rydberg constant, R oo , is the scaling factor which links the spectrum of atomic hydrogen to practical laboratory energy units. Thus it has intrinsic importance by providing information on our simplest atomic system. Precision measurements of the Rydberg constant, or more accurately of the Rydberg frequency cR oo , also have practical applications, since they effectively calibrate the entire hydrogen spectrum as a frequency standard. Previous measurements of R oo , and cR oo , have been carried out in the optical region. Our approach is to measure transitions between "; circular "; (maximum 1 and ?ml) states of hydrogen and deuterium Rydberg atoms with principal quantum numbers in the range n = 27 ? - 30. These transitions lie in the millimeter-wave regime, at 250 - 320 GHz. We have measured the n = 27 ? n = 28 circular transitions with statistical uncertainties of approximately 1 x 10- 10 . We have also determined how to account for frequency shafts due to the Stark and Zeeman effects. This thesis describes the methods and apparatus used to perform these measurements. A novel technique for analyzing the data obtained with a timeresolved Ramsey interference method is presented, and important sources of systematic error are analyzed. Thesis Supervisor: Daniel Kleppner Lester Wolfe Professor of Physics for Sonia

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 This record is the front matter from a document that appears on a server at MIT and is used through permission from MIT. See http://theses.mit.edu:80/Dienst/UI/2.0/Describe/0018.mit.theses/1998-288 for copyright details and for the full document in image form.

Precision Spectroscopy of Circular Rydberg States of Hydrogen

by

Jeffrey R. Honey
B.A., Williams College (1989)

Submitted in partial fulfillment of the requirements for the degree of Doctor of Philosophy at the Massachusetts Institute of Technology September 1998
SIGNATURE OF author: [[signature omitted]]

Department of Physics

August 19, 1998
CERTIFIED BY: [[SIGNATURE OMITTED]]

Daniel Kleppner Lester Wolfe Professor of Physics Thesis Supervisor ACCEPTED BY: [[SIGNATURE OMITTED]]

Thomas J, Greytak

Professor of Physics Associate Department Head for Education ARCHIVES MASSACHUSETTS INSTITUTE OF TECHNOLOGY LIBRARIES OCT 09 1998

Massachusetts Institute of Technology Page 1 Dec 31, 1998

Page 2 of 5

Precision spectroscopy of circular Rydberg states of hydrogen

Precision Spectroscopy of Circular Rydberg States of Hydrogen

by

Jeffrey R. Honey

Submitted to the Department of Physics on August 19, 1998, in partial fulfillment of the requirements for the degree of Doctor of Philosophy

Abstract

The Rydberg constant, Roo, is the scaling factor which links the spectrum of atomic hydrogen to practical laboratory energy units. Thus it has intrinsic importance by providing information on our simplest atomic system. Precision measurements of the Rydberg constant, or more accurately of the Rydberg frequency cRoo, also have practical applications, since they effectively calibrate the entire hydrogen spectrum as a frequency standard.

Previous measurements of Roo, and cRoo, have been carried out in the optical region. Our approach is to measure transitions between " circular " (maximum 1 and ?ml) states of hydrogen and deuterium Rydberg atoms with principal quantum numbers in the range n = 27 ? - 30. These transitions lie in the millimeter-wave regime, at 250 - 320 GHz.

We have measured the n = 27 ? n = 28 circular transitions with statistical uncertainties of approximately 1 x 10-10. We have also determined how to account for frequency shafts due to the Stark and Zeeman effects. This thesis describes the methods and apparatus used to perform these measurements. A novel technique for analyzing the data obtained with a timeresolved Ramsey interference method is presented, and important sources of systematic error are analyzed.

Thesis Supervisor: Daniel Kleppner Lester Wolfe Professor of Physics

for Sonia

Contents

1 Introduction.....13
1.1 Motivation.....13
1.2 History of the Experiment.....17
1.3 Guide to the Thesis.....17
2 Experimental Overview.....19
2.1 Principle of the Method.....19
2.2 Advantages of Circular Rydberg States.....21
2.3 Apparatus.....23
3 Atomic Beam and Laser Excitation.....30
3.1 Ground State Cold Atomic Beam.....30

Massachusetts Institute of Technology Page 2 Dec 31, 1998

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