In the paper, new visible wide angle view imaging system of KTM tokamak is described. The system has been designed to observe processes inside of plasma and the processes occurring due to plasma-wall interactions through the long equatorial port. Imaging system is designed based on special image fiber bundle and entrance wide angle lens, which provide image of large section of the vacuum chamber, both poloidal half-section and divertor through the sufficiently long equatorial port. The system also consists of two video cameras: slow and fast with image intensifier. Commercial equipment had been used in design of the system that allowed reducing the cost and time for research and development. The paper also discusses advantages and disadvantages of the system in comparison with conventional endoscopes based on a lens system and considers its promising utilization in future tokamaks and future steady state fusion reactors.

Topics
Differential topology, Nuclear reactors, Fusion reactors, Plasma confinement, Neutron flux, Tokamaks, Video camera, Plasma discharges, Plasma interactions, Medical diagnosis
1.
A. V.
 
Vershkov
 et al., “
Upgrade of the endoscopic optical system installed on the T-10 tokamak. The first experimental results
,”
Probl. At. Sci. Technol. Thermonucl. Fusion Ser.
 
35
(
4
),
80
–
86
(
2012
).
Google Scholar
 
2.
A. J.
 
Allen
 et al., “
The high resolution video capture system on the alcator C-Mod tokamak
,”
Rev. Sci. Instrum.
 
68
,
947
(
1997
).
https://doi.org/10.1063/1.1147721
Google Scholar
Crossref
Search ADS
 
3.
A.
 
Géraud
 et al., “
Fast imaging system on Tore Supra
,”
Rev. Sci. Instrum.
 
80
,
33504
(
2009
).
https://doi.org/10.1063/1.3098944
Google Scholar
Crossref
Search ADS
 
4.
J.-M.
 
Travere
, “
The IR and visible wide angle viewing system for ITER
,” Overview and challenges, ITER Business Forum 2007, Nice, France, 10–12 December 2007.
5.
E.
 
Gauthier
 et al., “
Design of a wide-angle infrared thermography and visible view diagnostic for JET
,” preprint of paper to be submitted for publication in Proceedings of the EPS Conference, Tarragona, Spain, 27th June–1st July 2005.
6.
Design study of a wide-angle infrared thermography and visible observation diagnostic on JT-60SA, Report of QIRT 2012 ID-220, 2010.
7.
M.
 
Clever
 et al., “
A wide angle view imaging diagnostic with all reflective, in-vessel optics at JET
,”
Fusion Eng. Des.
 
88
,
1342
–
1346
(
2013
).
https://doi.org/10.1016/j.fusengdes.2013.01.038
Google Scholar
Crossref
Search ADS
 
9.
C. P.
 
Chrobak
 et al., “
Restoring transmission of irradiated image fiber bundles
,”
Rev. Sci. Instrum.
 
83
(
10
),
10E514
(
2012
).
https://doi.org/10.1063/1.4733544
Google Scholar
Crossref
Search ADS
PubMed
 
© 2015 AIP Publishing LLC.
2015
AIP Publishing LLC
You do not currently have access to this content.