D.GuilhemITER IR/VIS Diagnostic -- April 4th Cadarache Euratom 1/22 ITER wide-angle viewing thermographic and visible system Y.Corre, S.Droineau, A.Geraud, D.Guilhem, R.Jasper, E.Thomas, G.Madalluno, J.B.Migozzi, C.Walker Duties: - IR Thermography of the main chamber - Visible Spectroscopy (D , impurities: W, Be, C…) - Runaway Studies

D.GuilhemITER IR/VIS Diagnostic -- April 4th Cadarache Euratom 2/22 This presentation Our “know-how” for TORE-SUPRA Optical and Mechanical Pre-designs of IR and VIS Spatial resolution Pellet viewing Points to be Adressed and Developments Conclusions

D.GuilhemITER IR/VIS Diagnostic -- April 4th Cadarache Euratom 3/22 IR Thermography on Tore-Supra

D.GuilhemITER IR/VIS Diagnostic -- April 4th Cadarache Euratom 4/22 Feed-Back Control Participates to the security of PFC - Feed-Back on surface temperature of PFC - Antenna limiter protections (LHCD, ICRH) - Main Toroidal Pumped Limiter - Feed-Back compatible with others feedback - Width of current profile  n // - V loop  Poloidal Field Current - Heating power  IR thermography - Detection and Killing of ARCs at the LHCD mouth

D.GuilhemITER IR/VIS Diagnostic -- April 4th Cadarache Euratom 5/22 Global Assembly : Ports Configurations Study STARTING POINT: - 4 Mounting places : EQ#01, EQ#03, EQ#09, EQ# known & approved (by ITER Team) port configurations : Preliminary design in Port 1 and Port 3 (C.Walker 2001) ITER preliminary design EQ #3

D.GuilhemITER IR/VIS Diagnostic -- April 4th Cadarache Euratom 6/22 Diagnostics space occupation port plug EQ#01 Top view Side view

D.GuilhemITER IR/VIS Diagnostic -- April 4th Cadarache Euratom 7/22 Points of Interest Blind Spot

D.GuilhemITER IR/VIS Diagnostic -- April 4th Cadarache Euratom 8/22 REFERENCE Optical Line Distance between Front-End mirror and Cassegrain Relay is FIXED Fixed

D.GuilhemITER IR/VIS Diagnostic -- April 4th Cadarache Euratom 9/22 Generic Viewing Line Head mirrors + Deflecting flat mirrors in the dogleg + Cassegrain telescopes + Adaptative relay Visible IR 2 Cassegrains telecopes Head mirrors Adaptative relay Flat Mirrors

D.GuilhemITER IR/VIS Diagnostic -- April 4th Cadarache Euratom 10/22 Visible and IR Cassegrain telescopes embedded together IR Cassegrain Visible Cassegrain IR Image Visible Image

D.GuilhemITER IR/VIS Diagnostic -- April 4th Cadarache Euratom 11/22 Ray tracing of one hollow relay Field groups IR Visible

D.GuilhemITER IR/VIS Diagnostic -- April 4th Cadarache Euratom 12/22 General view of an assembled line (from the Cassegrain telescopes to the Bio-shield) Auto-Adaptative relay : - 5 mm in X,Y directions - 45 mm Z direction Auto-Adaptative « sliding » relay x y z

D.GuilhemITER IR/VIS Diagnostic -- April 4th Cadarache Euratom 13/22 Integration of Optical design into a Mechanical design

D.GuilhemITER IR/VIS Diagnostic -- April 4th Cadarache Euratom 14/22 Clashes Port-Plug#1 Interference 1 and 2 Interference 3

D.GuilhemITER IR/VIS Diagnostic -- April 4th Cadarache Euratom 15/22 Side view of the port-plug Opening to access the mirrors adjustments An opening is necessary on the side for mirrors adjustments Bio-Shield

D.GuilhemITER IR/VIS Diagnostic -- April 4th Cadarache Euratom 16/22 Infrared Cameras Expected F-number on IR sensor : 1200 x 1000 pixels array with 15µm pitch (y=18mm x 15mm), then: FN = y / SQGE = 3.3 Maximum Resolution : If one inject the “point size” 1pt =. FN 55% ensquared energy) it comes (resolution = SQGE / ): - For IR : = 1800pts = 1080pts - For hollow Visible : = 3375pts = 1928pts

D.GuilhemITER IR/VIS Diagnostic -- April 4th Cadarache Euratom 17/22 Spatial resolution and wall covering r (m) z (m) median in median out top divertor out divertor in  Sampling : poloidal section = 150 points reproduced every   1   ~ points main chamber view: ( ,  ) r (cm)  (radian)  EQ#01, 03, 09, 12  /2 inner wall outer wall  (radian) top Good Coverage of the first wall > 80% Outer wall completely covered (r  9 mm) Half inner wall is viewed with : good resolution. Small areas not seen : top part and divertor region Divertor

D.GuilhemITER IR/VIS Diagnostic -- April 4th Cadarache Euratom 18/22 The respective locations of the pellet tracks and endoscopes from a top view. Pellet viewing 2 LFS injections 3 HFS injections P6 track P18 track P12 track P6 track P12 track

D.GuilhemITER IR/VIS Diagnostic -- April 4th Cadarache Euratom 19/22 Port plug EQ#01 #01 LEFT #01 DIVERTOR #01 RIGHT P18 P6 Same views for #03, #09 and #12 Conclusion: Good for Pellet tracking

D.GuilhemITER IR/VIS Diagnostic -- April 4th Cadarache Euratom 20/22 DEVELOPMENTS I. Wide band Visible and Infrared antireflection coating for lenses Simplified architecture Reduction of Optical and Mechanical tolerances Large increase of the Visible performances (but not the IR) II. Test the auto-adaptative shifting relay (solution more reliable than active method) : Relative movement of the machine respectively to the bio-shield, Can accommodate the ITER on-axis translation (45mm) and the transverse directions (5mm) III. Optical generic line choice and optimisation Actually not fully designed  missing elements / information Broadband coating ? Number of beam-splitters ? IV. A mechanical design should be done when points I to III will be achieved V. Any type of cooled infrared camera (3µm – 5 µm) is sensitive to magnetic field

D.GuilhemITER IR/VIS Diagnostic -- April 4th Cadarache Euratom 21/22 Points to BE ADRESSED 1)New optical calculations  Use Up-to-Date DATA (diagnostics, pupils, AR coating, etc…)  Remove off-Axis (8° between Optical Axis and Blind Spot) 2)Mechanical update to take into account new optical design 3)Design a test-stand (how to qualify the IR endoscopes)

D.GuilhemITER IR/VIS Diagnostic -- April 4th Cadarache Euratom 22/22 CONCLUSIONS TORE-SUPRA  FEED-BACK and ARC-DETECTION with IR Thermography ITER  Architecture design of a GENERIC Optical and Mechanical Line CLASHES : Some identified  Have to be solved COVERAGE and SPATIAL RESOLUTION : have been estimated  Good Is-it adequate for : - IR-Thermography ?  YES - Visible Spectroscopy : - D  ?  YES - W ?  NO - Be ?  To be checked - Runaways (10-50 MeV with detection limit of 1 kA) ?  YES - Pellets Injections (#06, #12 and #18) ?  YES - Replacing IR-Divertor thermography ?  NO

D.GuilhemITER IR/VIS Diagnostic -- April 4th Cadarache Euratom 23/22 Thank you for your attention