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Optimization of the pumping laser beam spatial profile in the MEOP experimentperformed at elevated 3He pressures

Published online by Cambridge University Press:  18 May 2011

T. Dohnalik ,
A. Nikiel ,
T. Pałasz ,
M. Suchanek ,
G. Collier ,
M. Greńczuk ,
B. Głowacz  and
Z. Olejniczak
T. Dohnalik
Affiliation:
M. Smoluchowski Institute of Physics, Jagiellonian University, Reymonta 4, 30-059 Kraków, Poland
A. Nikiel
Affiliation:
M. Smoluchowski Institute of Physics, Jagiellonian University, Reymonta 4, 30-059 Kraków, Poland
T. Pałasz
Affiliation:
M. Smoluchowski Institute of Physics, Jagiellonian University, Reymonta 4, 30-059 Kraków, Poland
M. Suchanek*
Affiliation:
Physics Department, Agricultural University, Al. Mickiewicza 21, 31-120 Kraków, Poland
G. Collier
Affiliation:
M. Smoluchowski Institute of Physics, Jagiellonian University, Reymonta 4, 30-059 Kraków, Poland
M. Greńczuk
Affiliation:
M. Smoluchowski Institute of Physics, Jagiellonian University, Reymonta 4, 30-059 Kraków, Poland
B. Głowacz
Affiliation:
M. Smoluchowski Institute of Physics, Jagiellonian University, Reymonta 4, 30-059 Kraków, Poland Laboratoire Kastler Brossel, École Normale Supérieure, 24 rue Lhomond, 75005 Paris, France
Z. Olejniczak
Affiliation:
M. Smoluchowski Institute of Physics, Jagiellonian University, Reymonta 4, 30-059 Kraków, Poland Institute of Nuclear Physics, Polish Academy of Sciences, Radzikowskiego 152, 31-342 Kraków, Poland
*
ae-mail: [email protected]
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Abstract

The efficiency of the metastability exchange optical pumping (MEOP) performed at elevated 3He gas pressures in high magnetic field was improved by modifying the spatial profile of the pumping laser beam in such a way that it matched the nonuniform distribution of plasma in the optical pumping cell. Comparing to a conventional Gaussian profile, at the 3He gas pressure equal to 267 mbar, both the achieved nuclear polarization (equal to 26%) and the total magnetization in the cell (equal to 1.37 sccfp) are 60% higher when the annular laser beam profile is applied.

Type
Research Article
Information
The European Physical Journal - Applied Physics , Volume 54 , Issue 2: Focus on Fuel Cells 2009 , May 2011 , 20802
Copyright
© EDP Sciences, 2011

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