DESIGN OF INFRARED FOR THE WEST PROJECT

Transcription

1 1 st IAEA Technical Meeting on Fusion Data Processing, Validation and Analysis Nice, 1 st -3 rd of June 2015 DESIGN OF INFRARED THERMOGRAPHY DIAGNOSTICS FOR THE WEST PROJECT X. Courtois, MH. Aumeunier, Ph. Moreau, C. Balorin, H. Roche, M. Jouve, JM Travere, F. Micolon, C. Begat, M. Houry IRFM JAN. 2015

2 OUTLINE Introduction IR views objectives & location Design & performances Cameras and signal processing Conclusion

3 THE WEST PROJECT A MAJOR UPGRADE OF TORE SUPRA WEST (Tungsten (W) Environment for Steady State Tokamak) project: Aims to transform TORE SUPRA configuration carbon Limiter (2012) X-point, tungsten Divertor (2016) Carbon Tungsten WEST + Tore Supra supra conductive magnets and actively cooled Plasma Facing Components = capabilities of long pulse operation in a full metallic environment, high fluency (10 MW/m² steady state), H mode => Tore Supra is a unique facility as test bed for ITER W Divertor technology PAGE 3

4 OUTLINE Introduction IR views objectives & location Design & performances Cameras and signal processing Conclusion

5 IR VIEWS & MONITORED COMPONENTS Objectives: Measure the surface temperature of Plasma Facing Components (PFC) In order to ensure their integrity and provide data for physics Equatorial port Wide Angle Tangential view Upper divertor (W/Cu) Endoscope optic front end Upper port protection (W/Cu) folded spherical mirror Antennae view Niche Bumper (W/CFC) Inner wall (SS) Outer wall (SS) Standard divertor view Antennae protection (W/CFC) Lower divertor (full W) High resolution view Baffle (W/Cu) PAGE 5

6 IR VIEWS OBJECTIVES & LOCATION (1/2) 7 endoscopes located in upper ports 7 Divertor Standard Views 100% divertor surface (with overlap) field of view: 60 toroidal angle endoscope location LH C3 ICRH Q4 LH C4 Objectives: RT protection of the divertor Physics studies : Plasma Wall Interactions PFC behavior (dust deposition, ageing)... Spatial resolution <10 mm ICRH Q1 ICRH Q2 Tokamak top view PAGE 6

7 IR VIEWS OBJECTIVES & LOCATION (2/2) 5 Antennas views 3 ICRH & 2 LHCD => for RT protection Spatial resolution <10mm 1 Wide Angle tangential view (equatorial port) => temperature monitoring of upper divertor, upper port protections, a bumper mirror in Inner Protection panel sas ICRH Q4 LH C3 => 14 IR views in total LH C4 1 Divertor High Resolution view (2 possible locations in free LoS) => Study gaps and leading edges => Redundancy with the standard views Spatial resolution <1mm ICRH Q1 ICRH Q2 tokamak top view PAGE 7

8 OUTLINE Introduction IR views objectives & location Design & performances Cameras and signal processing Conclusion

9 UPPER PORT ENDOSCOPE OVERALL DESCRIPTION IR Cameras NEW! NEW! Machine Flange NEW! Optical tube 100 mm 3 optical lines large FOV, water cooled Head NEW Optic front end + Heat load NEW Niche - Folded mirror - cooling plate PAGE 9

10 OPTICAL DESIGN AND PERFORMANCES IR Wavelength Band Expected range of Temperature (ε=0,2) Time resolution Pixel Projection (512x640 pix) Expected resolution with real 95% true temp. Standard Divertor view (x7) DESIGN COMPLETED [1 5µm] 1.7 µm 200 C C 50 Hz full frame Multi Integration Time (high dynamic T range) 2.8 mm 8 12 Antenna view via mirror (x5) DESIGN COMPLETED 50 Hz full frame [1 5µm] 1.7 µm 300 C C Multi Integration Time (high dyn. T range) 2 mm 6 24 High Resolution Divertor view DESIGN ONGOING 250 Hz full frame [0.6 5µm] 1.7 µm 250 C C 1 adaptive IT (reduced T range) 0.7 mm target Wide Angle Tangential view DESIGN IN PROGRESS [1 5µm] 3.5 µm C 350 Hz full frame 5kHz cropped frame 1 adaptive IT (reduced T range) > 10 mm NA (high depth of field) PAGE 10

11 STANDARD DIVERTOR VIEW (2 X 48 FOV) Left and right views uses 2 optical lines Optically combination on one detector frame Optical simulation: LEFT STD VIEWDVT LEFT VIEW RIGHT VIEW SPEOS CAAV5 CEA PAGE 11

12 STANDARD DIVERTOR VIEW OPTICAL DESIGN camera ~ 2000 mm 28 lenses (ZnSe, ZnS_Broad, Silicon, CAF2) 2 prisms 4 mirrors 2 tight sapphire windows Status : Optical and Opto mechanical design completed Call for tender for Manufacturing in progress PAGE 12

13 ANTENNA VIEW SIMULATION SPEOS CAAV5 CEA Monte Carlo Ray tracing photonic simulation PAGE 13

14 ANTENNA VIEW OPTICAL DESIGN Antenna tight window and deflecting mirror relay lenses tight window head optics ~ 2200 mm camera lens 32 lenses (CAF2, Sapphire, AMTIR1, ZnS_Broad) 2 mirrors 2 tight sapphire windows water cooled plate Folded Mirror Molybdenum or SS spherical mirror Radius 250mm Status : Optical and Opto mechanical design completed Call for tender for Manufacturing in progress Mirror: 2 prototypes under manufacturing (Molybdenum & SS) PAGE 14

15 HIGH RES. DIVERTOR VIEW (20 FOV) The HR view uses the third optical line Optical simulation LEFT VIEW RIGHT VIEW HR VIEW 512 pixels Strike points 640 pixels 430 mm Status : Design in progress SPEOS CAAV5 CEA PAGE 15

16 TANGENTIAL VIEW PRELIMINARY DESIGN Simpler design (more space available): 2 mirrors in the vacuum vessel + tight window + camera lens Camera + lens Tight window (sapphire) Optical head spherical mirror Pupil hole 3mm plan mirror Status : Optical design completed Opto mechanical and Mechanical design in progress PAGE 16

17 IN SITU TEST : IR REFERENCE SOURCES IR sources located on antennas and on divertor views: => reference hot spot check camera good working adjust masks of Region Of Interest Example of location on LH antenna Rugged & vacuum resistant 5 W 900 emissivity = 0.8 Ni filament 3.5 mm IR sources Alumina 3V PAGE 17

18 OUTLINE Introduction IR views objectives & location Design & performances Cameras and signal processing Conclusion

19 GLOBAL DATA PROCESSING ARCHITECTURE IR acquisition Unit Wall Monitoring system WEST database Other Diag. data RT Monitoring Wall Monitoring and interfaces System with external systems + IR server Tmax, ROI Alarm + Arc detection + Reflection assessment RT Works Copper link IR data PXI Express 3 x 64 MB/s (lossless compression) (5 identical units) RT basic data processing & Acquisition system Raw DL Chrono board 3 FPGA boards Acquisition + RT processing Optic fibre Ethernet 64MB/s x3 IR luminance video stream + Tmax & alarm / Region Of Interest PXIe / PCIe extender Cam. Link + Temperature + ROI data Optical Transceiver RS232 GPIO Acquisition PC >500 GB Local data storage (+screen in Control Room) Tokamak WEST Cameras power supply Camera Link RS232 GPIO Optical Transceiver Optical fibre Data capture (Cameras) PAGE 19

20 HOME MADE IR CAMERAS IRFM experience in camera assembling for harsh environment (B +T ) : On the shelf InSb detector spectral range : 1,5µm 5,0µm 640x512 pixels, Pitch : 15µm 250 Hz acquisition full frame Camera Link video format Multi Integration Time (up to 6 IT) 12 home-made cameras Customised features, affordable cost IRFM Design Thermalized filter Soft iron magnetic shielding Rugged power supply Water cooling control Optical Camera Link transceivers Status: Detector procurement in progress Camera design done Others available cameras: Bi spectral camera, HgCdTe 3.5 & 4.5 m 640x512 pix Fast camera, InSb 1 5 m 640x Hz PAGE 20

21 FPGA BOARD CENTRAL HARDWARE COMPONENT Functions: Camera basic functions: Detector local board control Data calibration & corrections (Bad Pixel Replacement, NUC,...) RT Multi Integration-Time processing (up to 6 IT) Data acquisition and storage on PC (PXIe bus) Real time data processing: Region Of Interest processing: Temperature threshold alarm -> Interlock system hard output Hot spot detection, Spatial and temporal filtering RT Data throughput to WMS (Ethernet) Status: Under procurement Code development (VHDL) in progress Reuse of former developments on similar FPGA boards : Monitore Project (IRREEL diag) : algorithms for thermal events smart detection JET Protection Inner Wall project: algorithms for RT monitoring (ROI, filtering,...) Home made bi spectral camera : algorithms for calibration, NUC, adaptive IT, acquisition PAGE 21

22 WALL MONITORING SYSTEM DISCHARGE LEARNING / OPTIMIZATION PROCESS scenario compatibility with PFCs operational limits? Full integrated simulation from the plasma source to the measured temperature Before discharge Knowledge for scenario construction & operational limits Physics parameters (λq, Prad, etc.) Plasma parameters : Magnetic equilibrium, Ip WEST Database After discharge PFC material, optical properties & operational limits (max surface temperature) Diagnostics features During discharge Diag data (IR) Discharge data analysis to optimize next discharge Multi-diagnostics analysis for High level Machine protection M. Travere et al.,1st EPS Conference on Plasma Diagnostics, Frascati, April 2015 PAGE 22

23 OUTLINE Introduction IR views objectives & location Design & performances Cameras and signal processing Conclusion

24 CONCLUSION o The WEST upgrade of Tore Supra requires new diagnostics for PFCs protection o 4 different IR views are developed : standard and high resolution divertor views, antennas views, and 1 wide angle tangential view o The developments are in progress : optical and opto mechanical systems, IR cameras, acquisition and RT processing o A novel system (WMS) is proposed for high level machine protection and discharge control PAGE 24

25 THANK YOU FOR YOUR ATTENTION