An optical coherence imaging system is presently being designed for impurity transport studies and other applications on ITER. The wide variation in magnetic field strength and pitch angle (assumed known) across the field of view generates additional Zeeman-polarization-weighting information that can improve the reliability of tomographic reconstructions. Because background reflected light will be somewhat depolarized analysis of only the polarized fraction may be enough to provide a level of background suppression. We present the principles behind these ideas and some simulations that demonstrate how the approach might work on ITER. The views and opinions expressed herein do not necessarily reflect those of the ITER Organization.

1.
J.
Howard
,
A.
Diallo
,
M.
Creese
,
B.
Blackwell
,
S. L.
Allen
,
R. M.
Ellis
,
G. D.
Porter
,
W.
Meyer
,
M. E.
Fenstermacher
,
N. H.
Brooks
,
M.
Van Zeeland
, and
R. L.
Boivin
,
Rev. Sci. Instrum.
81
,
10E528
(
2010
).
2.
S. A.
Silburn
,
J. R.
Harrison
,
J.
Howard
,
K. J.
Gibson
,
H.
Meyer
,
C. A.
Michael
, and
R. M.
Sharples
,
Rev. Sci. Instrum.
85
,
11D703
(
2014
).
3.
J.
Howard
,
Plasma Phys. Controlled Fusion
50
,
125003
(
2008
).
4.
O.
Ford
,
J.
Howard
,
M.
Reich
,
J.
Hobirk
,
J.
Svensson
, and
R.
Wolf
, in
Proceedings 40th European Physical Society Conference on Plasma Physics, O2
(
European Physical Society
,
2013
).
5.
J.
Howard
,
C.
Michael
,
H.
Chen
,
R.
Lester
,
A.
Thorman
, and
J.
Chung
,
J. Instrum.
10
,
P09023
(
2015
).
6.
J.
Howard
,
C.
Michael
,
F.
Glass
, and
A.
Danielsson
,
Plasma Phys. Controlled Fusion
45
,
1143
(
2003
).
7.
J.
Howard
,
J. Phys. B: At., Mol. Opt. Phys.
43
,
144010
(
2010
).
8.
U.
Feldman
,
J. F.
Seeley
,
N. R. J.
Sheeley
,
S.
Suskewer
, and
A. M.
Title
,
J. Appl. Phys.
56
,
2512
(
1984
).
9.
H.
Kuramoto
,
N.
Hiraki
,
S.
Moriyama
,
K.
Toi
,
K.
Sata
, and
K.
Narihara
,
Fusion Eng. Des.
34-35
,
285
(
1997
).
10.
D.
Thomas
,
A.
Bozek
,
J.
Robinson
,
K.
Burrell
,
T.
Carlstrom
,
T.
Osborne
,
R.
Snider
,
D.
Finkenthal
,
R.
Jayakumar
,
M.
Makowski
,
D.
Nilson
, and
B.
Rice
,
Rev. Sci. Instrum.
72
,
1023
(
2001
).
You do not currently have access to this content.