OFFICE OF NAVAL RESEARCH
ENDOFTHEYEAR REPORT
PUBLICATIONS/PATENTS/PRESENTATIONS/HONORS/STUDENTS REPORT
for
GRANT or CONTRACT: N000149710214
PR Number 97pr03442-00
Title of GRANT or CONTRACT
"Precision Atomic Magnetometry Based on Nonlinear Faraday Effect"
Name(s) of Principal Investigators
Dmitry Budker
Name of Organization
Department of Physics, University of California, Berkeley
Address of Organization
366 LeConte Hall, Berkeley, CA 94720-7300
Date Submitted
08/28/97
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OFFICE OF NAVAL RESEARCH
PUBLICATIONS/PATENTS/PRESENTATIONS/HONORS REPORT
PR Number: 97pr03442-00
Contract/Grant Number: N000149710214
Contract/Grant Title: Precision Atomic Magnetometry Based on Nonlinear Faraday Effect
Principal Investigator: Dmitry Budker
Mailing Address: Department of Physics, University of California, Berkeley, 366 LeConte Hall, Berkeley, CA 94720-7300
Phone Number: 510/643-1829 Fax Number: 510/643-8497
Email Address: http address:
a. Number of papers submitted to refereed journals, but not published: ____
b. + Number of papers published in refereed journals (for each, provide a complete citation): ___
c. + Number of books or chapters submitted, but not yet published: ____
d. + Number of books or chapters published (for each, provide a complete citation): ____
e. + Number of printed technical reports/nonrefereed papers (for each, provide a
complete citation): ____
f. Number of patents filed: ____
g. + Number of patents granted (for each, provide a complete citation): ____
h. + Number of invited presentations (for each, provide a complete citation): __1__
i. + Number of submitted presentations (for each, provide a complete citation): __1__
j. + Honors/Awards/Prizes for contract/grant employees (list attached): ____
(This might include Scientific Society Awards/Offices, Selection as Editors, Promotions, Faculty Awards/Offices, etc.)
k. Total number of Fulltime equivalent Graduate Students and PostDoctoral associates supported during this period, under this PR number: _2_
Graduate Students: _1_
PostDoctoral Associates: _1_
including the number of,
Female Graduate Students: ____
Female PostDoctoral Associates: ____
the number of
Minority* Graduate Students: ____
Minority* PostDoctoral Associates: ____
and, the number of
Asian Graduate Students: ____
Asian PostDoctoral Associates: ____
l. + Other funding (list agency, grant title, amount received this year, total amount, period of performance and a brief statement regarding the relationship of that research to your ONR grant)
+ Use the letter and an appropriate title as a heading for your list, e.g.: b. Published Papers in Refereed Journals, or, d. Books and Chapters published. Also submit the citation lists as ASCII files via email or via PCcompatible floppy disks
h. Invited presentation
M. G. Kozlov and V. V. Yashchuk, Estimate of P- and P,T-odd effects in diatomic van der Vaals molecules. 2nd International Symposium on Symmetries in Subatomic Physics, Seattle, Washington, June 25-28, 1997.
i. Submitted presentation
D. Budker, V. V. Yashchuk and M. Zolotorev, Apparatus for the study of the nonlinear Faraday rotation effect. University of California, Berkeley: 4th Annual Physics Department Poster Session, September 17, 1997.
l. Other funding
(list agency, grant title, amount received this year, total amount, period of performance and a brief statement regarding the relationship of that research to your ONR grant)
Faculty Research grant, University of California, Berkeley, Committee on Research, $ 1,000; 97-98.
This single installment grant supports an undergraduate student (Donald Clyde) who participates in the ONR-sponsored project.
Collaborative Research in Basic Science and Engineering grant, National Research Council, $ 2,500; 97. This single-installment grant sponsored work on collaborative proposal for a new experiment aimed at a measurement of nuclear anapole moment of potassium. This experiment is based on some of the same laser and vapor cell technology that is being developed for the ONR-sponsored project.
Nuclear Science Division grant, Lawrence Berkeley National Laboratory, $ 2,500; 97. This single-installment grant allows us to use LBNL resources (machine shop, optical glass shop, etc.) for manufacturing the nonlinear Faraday rotation apparatus. Most recently, we have used LBNL facilities to polish rods for Faraday modulators, and for rolling magnetic shields in the sheet metal shop.
Undergraduate Laboratory Grant, NSF, $ 19,300; 97-98. This grant is for setting up new laser spectroscopy and magnetooptics experiments at the advanced undergraduate laboratory at Berkeley. The core experiment will be demonstration of the nonlinear Faraday rotation effect. It will utilize results, techniques and experience obtained in the course of the ONR-sponsored research.
EOY report - Part II
a. Principal Investigator: Dmitry Budker
b. Telephone: 510/643-1829
c. ONR Program Officer: Dr. Herschel S. Pilloff
d. Program objective: Proof-of-principle demonstration of precision atomic magnetometry based on nonlinear Faraday rotation, development of a prototype magnetometer based on this effect, optimization of the parameters of the device, and investigation of effects limiting its performance.
e. Significant results during the last year: The program began upon the commencement of the ONR funding on March 14, 1997. During the first months, our efforts have been invested in setting up a new specialized optical laboratory at the Birge hall at Berkeley campus, and design and construction of the apparatus. We have completed assembly and testing of two tunable diode laser systems of our design, and of various laser diagnostic and control systems (confocal Fabry-Perot spectrum analyzers, specialized LabView-based experiment control and data acquisition software etc.). Using these instruments we have carried out preliminary characterization of 18 available rubidium vapor cells. We have completed the assembly of a precision spectropolarimeter and are finishing a multi-layer magnetic shielding system, necessary for the generation of well-characterized ultra-low magnetic fields. Impact: as a result of this year's work, we have practically completed the apparatus which will allow us to carry out the planned research. The ideas developed in conjunction with this project were used in a successful proposal for new experiments at the Berkeley Advanced Undergraduate Laboratory, including demonstration of the nonlinear Faraday effect in atomic vapor.
f. Summary of plans for next year (FY98): We will complete the testing of the spectropolarimeter and the magnetic shielding system, and manufacturing and assembly of the remaining components of the prototype magnetometer. The next steps will include measurements of its sensitivity and stability, development of detailed theoretical models describing its performance, and comparison with the experimental data. This will result in detailed understanding of statistical and systematic limits of sensitivity attainable with this technique. In addition, the ultrasensitive magnetometer, and the techniques developed in the course of this research will be applied to investigation of fundamental properties of atoms themselves, such as study of mechanisms of collisional relaxation of polarization and atomic parity violation.
g. Post-doctoral researcher: Valeriy V. Yashchuk; graduate student: Damon E. Brown. We also have research assistance from an undergraduate student Donald Clyde.
EOY report - Part III
Explanation to viewgraphs:
Viewgraph 1. The text in the viewgraph is self-explanatory. The figure represents polarization rotation angle near atomic resonance as a function of magnetic field. The Nonlinear Faraday rotation contribution is most pronounced at small magnetic fields. Enhanced magnetometry sensitivity comes from extremely high value of in the NLFR regeme.
Viewgraph 2. This viewgraph summarizes our approach to magnetometry. This approach is two-fold: we seek to maximize by achieving very long spin-coherence relaxation times; and we use very sensitive laser polarimetry techniques to measure polarization rotation. The viewgraph also shows various possible arrangements for NLFR, the values of the effective relaxation rates demonstrated in earlier experiments, and the simplified schematic of the current Berkeley experiment with the target value of .
Viewgraph 3. This viewgraph shows the schematic and a photograph of the current apparatus.