X-Ray Line Polarization of the K-shell Resonance Line Emission of Heliumlike and Lithiumlike Sulfur at Relativistic Electron Impact Energies

Conference · Thu Mar 04 04:00:00 EST 2004

OSTI ID:15014022

May, M; Smith, A; Faenov, A Y; Chen, H; Robbins, D; Dunn, J; Reed, K; Pikuz, T; Beiersdorfer, P

We have measured the polarization of the heliumlike sulfur resonance line 1s2p {sup 1}P{sub 1} {yields} 1s{sup 2} {sup 1}S{sub 0}, and of the blend of the lithium-like sulfur resonance lines 1s2s2p {sup 2}P{sub 3/2} {yields} 1s{sup 2} 2s {sup 2}S{sub 1/2} and 1s2s2p {sup 2}P{sub 1/2} {yields} 1s{sup 2}2s {sup 2}S{sub 1/2} as a function of electron beam energy from near threshold to 144 KeV. These lines were excited with the LLNL high-energy electron beam ion trap and measured using a newly modified two-crystal technique. Our results test polarization predictions in an energy regime where few empirical results have been reported. We also present calculations of the polarization using two different methods, and good agreement is obtained.

• Research Organization: Lawrence Livermore National Laboratory (LLNL), Livermore, CA
• Sponsoring Organization: USDOE
• DOE Contract Number: W-7405-ENG-48
• OSTI ID: 15014022
• Report Number(s): UCRL-PROC-202750
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
ELECTRON BEAMS
ELECTRONS
K SHELL
LAWRENCE LIVERMORE NATIONAL LABORATORY
PLASMA
POLARIZATION
RESONANCE
SPECTROSCOPY
SULFUR