Eur. Phys. J. Appl. Phys.
Volume 54, Number 2, May 2011
|Number of page(s)||7|
|Section||Plasma, Discharges and Processes|
|Published online||18 May 2011|
Optimization of the pumping laser beam spatial profile in the MEOP experiment performed at elevated 3He pressures
M. Smoluchowski Institute of Physics, Jagiellonian University, Reymonta 4, 30-059 Kraków, Poland
2 Physics Department, Agricultural University, Al. Mickiewicza 21, 31-120 Kraków, Poland
3 Laboratoire Kastler Brossel, École Normale Supérieure, 24 rue Lhomond, 75005 Paris, France
4 Institute of Nuclear Physics, Polish Academy of Sciences, Radzikowskiego 152, 31-342 Kraków, Poland
Accepted: 2 March 2011
Published online: 18 May 2011
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.
© EDP Sciences, 2011
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.