Facilities and Diagnostics. Jim Irby MIT-PSFC

Transcription

1 Facilities and Diagnostics Jim Irby MIT-PSFC

2 Outline Machine History and Status Update on C-Mod Contributions to ITER Technology Facility Upgrades Diagnostics Data Acquisition Short term plans

3 Machine History and Status History 16.7 research weeks in FY2006 (JOULE target of 14 weeks) Number of discharges during FY2006 campaign: 1658 No research weeks so far in FY2007 (15 weeks planned) New lower hybrid stainless steel couplers were installed and operated well at coupled powers of ~1 MW Up-to-Air following the FY2006 Status Installation of upper divertor cryopump and associated diagnostics Installation of tungsten lamella tiles in outer divertor Facility and diagnostic upgrades and new installations Installations, alignments, calibrations ongoing Plasma operation to begin end of next month

4 Contributions to ITER Technology Update Tungsten Lamella Tiles Design similar to those being considered for ITER Installation proceeding Fast Ferrite Tuners for Real-time ICRF matching Installation and operation of refurbished prototype FY2007 Wall conditioning/coating technology Boron coated tiles will be installed in outer divertor Work on boron deposition will continue FY2007 campaign Marker tiles Gas Jet Disruption Mitigation Disruption mitigation experiments will continue FY2007 campaign

5 Contributions to ITER Technology Update Remote Participation Tools Off-site session leaders routinely use audio, video and MDS- Plus tools to communicate with on-site personnel and direct run We are working directly with the US and international ITER teams to define remote conferencing technologies for ITER Dust Detection Boron dust will be injected and imaged during FY2007 campaign Polarimetry CO 2 prototype tests will continue in FY2007 New shutter and metal retro-reflector system FIR laser will be procured 2 nd quarter FY2007 Detector systems being investigated (Cal Tech + Commercial)

6 Facility Upgrades Major Machine Upgrades for FY2007 include Upper divertor cyropump and new protection hardware 3 MW source power available for lower hybrid system Tungsten tile lamella belt in outer divertor FFT system available for E-Port Antenna General facility upgrades Completion of PLC to PC software and hardware upgrades for engineering control systems Upgrades to LN 2 delivery and GN 2 exhaust systems Upgrades to ICRF control and data acquisition system Upgrades to engineering scanner systems (HEAT, TF)

7 Cryopump Support cable LN 2 shield LN 2 feedline Cryopump is shown installed in upper chamber Cables support pump with low thermal conductance to the walls Protection hardware will bolt onto shim plates seen at right along with the new Rogowski coils

8 Tungsten Tiles (MIT/Sandia) ITER relevant technology Laminate of 4 mm thick tungsten plates Will form a toroidal belt of tiles on the lower outer divertor Installation proceeding for FY2007 campaign Assembled tile ready for installation Serial numbers Bolt and nut secure tiles and anchor to support plate

9 Real-Time Matching Prototype Using Fast Ferrite Tuners Response time ~ 1 ms Tuners have been characterized New power supplies have been procured and tested (original vendor supplies were not adequate) Control and protection sytem developed FFTs being refurbished (prototype obtained from ASDEX) Cell installation plan developed with installation expected early in FY2007 campaign Ferrites FFT Magnet Center Conductor

10 PLC to PC Interface and Control Room Upgrades Fifteen DOS based engineering control systems have been replaced with Windows based systems Old systems staged out over approximately the last 24 months Server based networked system Easy maintenance Near real-time Data logging to MDSPlus The hardwired engineering display in the control room has been replaced with video display screens Engineering parameters and trends Physics data can also be displayed Video conferencing abilities enhanced

11 Long Pulse Diagnostic Neutral Beam Extensive interlock system was installed and is in operation to protect inner wall and wall diagnostics during long pulse operation (1.5/3.0 s) DNB flange was removed and modified to allow for 7 o toroidal rotation of beam We are working with the DNB vendor to install a beamline baffle needed to improve the spatial resolution of MSE/BES systems DNB chamber is under vacuum and support systems are being brought back on-line

12 Diagnostics Partial list of diagnostic changes for FY2007 campaign New X-Ray spectrometer for core rotation/t i measurements Shutter/retro-reflector mods for polarimeter Quartz microbalances (Surface Science Station) Measure deposition and erosion Boronization coatings Bolometry upgrades New inner wall scanning probes Upgrades to CXRS, MSE, and BES systems Upgrades to Core Thomson Scattering system Installation of new Penning gauges Quantify pumping/cryopump operation Mount easily on vessel wall

13 We have identified and corrected a major cause of MSE calibration anomalies Large anomalies in MSE calibration Proposed mechanism explains presence of spectral feature on blue side of Ha line. 1.2 Normalized intensity Measured Angle (degrees) Actual Pitch Angle (degrees) Beam-into-gas calibration is confused by a secondary population of beam neutrals measured calculated Wavelength (nm) DNB has been rotated 7o toroidally DNB 7 MSE ~100% of fast ions re-neutralize before they leave MSE viewing 'footprint'. The neutrals have random gyro phase and emit Stark-emission pattern at random polarization angle.

14 Upgrades to Correlation Reflectometer 2006 baseline program Install replacement 140 GHz Gunn diode for density fluctuation measurements at 2.4 x m baseline program Install GHz swept frequency Gunn diode for density correlation measurements. Design ITER prototype correlation reflectometer incremental program: build, install and operate ITER prototype 180 GHz, X-mode polarization, single channel. Profile measurements using AM modulation technique using two stable sources close in frequency ( MHz) to obtain group delay. Radial correlation measurements using swept-frequency source (5-10 GHz). Poloidal correlation measurements using poloidally displaced antenna, receiver (no extra source needed).

15 New X-ray Spectrometer Spatially Resolving HIgh REsolution X-ray spectrometer (SR HiReX) Improved time response, and spatial resolution and coverage Spherically bent crystal spectrometer looking at H & He-like Argon emissions lines Will provide impurity temperature and rotation profiles for r/a ~<0.8 He-like Crystal Gate Valve B-port H-like Crystal He-like Detectors H-like Detector Spectrometer Layout Pilatus X-ray Detector Module

16 Pilatus X-ray Detector Tests on C-mod A Pilatus detector was installed on one of the old poloidaly viewing Hirex spectrometers to test its feasibility for the new diagnostic. The detectors demonstrated high sensitivity, and performed well in the electrically/magnetically noisy C-mod environment Raw Spectra W-line Intensity vs. Time w x y z Spectral Resolution w 3.949Å x 3.966Å y 3.969Å z 3.994Å

17 Spectrometer Specifications Ar temp, velocity & density * profiles for (r/a <~0.8) * requires absolute calibration Wavelength range: He-like: 3.94 < λ < 4.00 H-like: 3.72 < λ < 3.78 Moly profiles also available from the Mo 32+ line in the H-like argon spectrum Number of independent spatial chords: He-like ~ 40 (3 modules), H-like ~ 15 (1 module) Estimated count rate: ~ 5x10 5 /chord/10ms (For a spectra from a central chord) Time resolution: ~ 10 ms Instrumental Temp: ~80 ev (Resolving power: ~10,000) Error in Velocity measurements: ~ +/- 3 [km/s] 16

18 7 Magnetic Pickup Coil Limiters Improve Toroidal Mode Resolution New pick-up coil limiters at four toroidal locations and Z = ±10 cm improve n resolution for Alfvén Cascades and other MHD modes

19 Surface Science Station (S 3 ) K-Port Horizontal NeSOX SiLi S 3 Polarimeter Beamline Allows samples and instrumentation to be moved in and out radially and also removed through a gatevalve Two QMBs (0.1 to 1 nm resolution) One radially viewing One perpendicular (360 o rotation) In-situ surface analysis using a curium MeV alphas (ARRIBA)

20 Penning Gauges Previously installed gauge New gauges Cryopump suspension cable New gauges will measure pressures above and below the room temperature shield in the cryopump gas box Pressure difference should be a direct measure of throughput Previously installed gauge gives measurement outside of gas box With the cryopump warm, difference in pressure inside and outside the box should be a good measurement of how well particles are being entrained in the gas box

21 Inner Wall Scanning Probes Two new fast scanning probes installed on inner wall (high field SOL) Linear major radius motion driven by embedded coils Four tungsten electrodes arranged in a Mach-probe geometry Identical geometry to outer midplane and vertical scanning probes Sensitive to plasma flows both and to B n e, T e, Vf profiles, and fluctuation-induced particle fluxes Graduate student project

22 BES Upgrades MSE/BES image dissector High-density 6x6 fiber array: better resolution Four 3-MB CPCI digitizers: better statistics (old CAMAC was MB) Long-pulse (1.5 s steady), higher-current (7 A) beam: (better statistics, stronger signal) New BES fiber array midplane Prior BES fiber bundles MSE fibers R(cm):

23 CXRS Views for 2007 φ, inner edge 7 pts, ΔR=4 mm φ, core 10 pts, ΔR=5 mm θ core 15 pts, ΔR=5 mm φ, outer edge 20 pts, ΔR=3 mm θ, outer edge 25 pts, ΔR=3 mm Modifications allow us to pursue: Ti pedestal v θ comparisons to neoclassical ITB foot measurements Impurity transport Pedestal and SOL flows Poloidal chords 25 outer edge (MIT) 0.86 < R < 0.905m, < 3.5 mm resolution 20 poloidal chords (U. Texas) 0.75 < R < 0.90 m, ~ 5 mm resolution Toroidal chords 10 core (U. Texas) 0.75 < R < 0.86 m, ~ 5 mm resolution 20 outer edge, CXRS (MIT) 0.89 < R < 1.07 m, < 3 mm resolution, CXRS 0.89 < R < 1.07 m, < 3 mm resolution, background 7 inner edge (MIT) 0.44 < R < 0.465m, < 4 mm resolution

24 New Gas-Puff-Imaging View of Region just Outboard of X-pt poloidal projection of view New GPI telescope in machine (minus coupling to fiber bundle) This view will be coupled to a new Phantom 7.3 Fast-Framing Camera (64x64 pixels at 150,000 frames/s - continuous)

25 Bolometry 212 AXUV channels for (R,Z) resolved measurements at 100 khz [accurate power balance, disruption mitigation, impurity transport] Full midplane coverage with over twice previous spatial resolution (44) Full tangential views at +/ cm and +/- 25 cm (128) up/down asymmetries as seen in impurity/soft x-ray emission in/out asymmetries predicted from rotation of high-z impurities Tomographic reconstructions using lower x-point views (40) 100 Lyman alpha filtered AXUV diode channels [neutral density, ionization rate, opacity] Tangential views at outboard midplane (20) and +/- 20 cm (40) Intitial set of divertor views, eventual tomographic reconstructions (40) Significant infrastructure installed will allow diagnostic to be easily upgraded or modified for future campaigns.

26 Upper Chamber Rogowski Coils Total current Rogowski New coils will measure halo current into wall in 10 sectors Total current also measured Sector Rogowskis

27 Prototype Polarimeter Inner wall shutter assembly An FIR polarimeter/interferometer system will complement the MSE measurements of j(r) ~20 poloidally viewing chords 118 μm FIR dual laser system Poloidally viewing geometry and plasma parameters similar to those expected on ITER For FY2007 campaign (CO 2 laser) shutter system on inner wall improved retro-reflectors Continue tests of rotation and density measurements Feedback control of beam position Procurement of the FIR laser underway Procurement of FIR detectors underway

28 Core Thomson Scattering Upgrades We will increase number of core channels from 11 to 16 for enhanced radial resolution --- cm resolution in vicinity of ITB Exclusive use of compact polychromators (GA) for light collection Delivery expected early 07 (delayed from August 06) Streamlined hardware configuration and data acquisition More efficient use of space Currently assembling additional auxiliary control systems and power supplies for new polychromators Will incorporate new fiber bundles with improved transmission in the near-ir New fast digitizers will supplement, eventually replace, LeCroy FERA modules Will begin testing during shot cycle during beginning of campaign In-house calibration, installation and operation expected in FY2007

29 Dust Injector (ITPA High Priority) Important safety issue for ITER Study dust interaction with plasma SOL Inject boron dust through capillary into plasma Illuminate dust with laser View with video cameras Lab test of boron injector

30 Data Acquisition and Control

31 Data Acquisition Since last PAC Meeting Hardware Purchased and deployed 2 nd LTO3 based Tape library for archive and backup. 2 nd DPCS system deployed for FFT. Migration from CAMAC to CPCI continuing Firewire Camera data acquisition computers upgraded Five new C-Mod workstations (dual processor, dual core, 64 bit) total Two new data system development computers Development ISCSI raid array Upgrades to data storage, servers, and networking capability will continue over the next year

32 Data Acquisition Software Long Pulse MDSplus initial design and implementation Multiple data versions in MDSplus Named extended node attributes. Support for 64bit platforms in MDSplus New WIKI based MDSplus website ( ) New development systems being used to look at server clustering Ongoing MDSPlus support (on- and off-site) Ongoing tests of advanced communication technologies (SIP, EVO, WEBEX, AG)

33 Data Acquisition Data needs still increasing rapidly Improved hardware and software still able to keep up Starting to implement raw data reduction schemes Calendar Year

34 Direct Data System Support of ITER We are working with the US and International ITER teams to define remote conferencing technologies for the ITER project, and with GA, we prepared a white paper which summarizes recommendations We have begun to work with the ITER team to help define CODAC requirements and a conceptual design for ITER (working with Jo Lister) We continue to support production use of the National Fusion Collaboratory tools which were developed under a separate DOE contract. These tools include secure remote code invocation (TRANSP) and interactive collaborative technologies (application sharing, video conferencing)

35 Short Term Operational Plans Complete up-to-air (mid Feb) Cooldown tests of cryopump (mid Feb) Begin plasma conditioning (end Feb) Physics operation (15 weeks) Complete FY2007 operation (early Aug)

36 Up-to-Air Task List General Ops: Service/Upgrade LN 2 feedlines Service LN 2 vent duct Service Power Systems Sparker Development Service/Repair PFCs Replace HEAT TC Scanner Replace HV reed relays in TF Scanner Ratiomatic upgrade Data system upgrades Network upgrades PC to PLC interface upgrades Diagnostics/Invessel: cryopump W Lamella Tiles antennna refurbishment NESOX move to k-hor 10" flange surface science station (microbalance) bolometer upgrade mods to b-hor for hirex/new detector automate the MSE shutter MSE cals/checks/mods flapper removal/cover plate installation remove woven glass seal from divertor mods to reduce outer divertor radiation outer divertor test tiles (B, CBN, W) shutter for polarimeter retros metal polarimeter retros TCI feedback control install 7 limiter magnetic coils fix magnetics as possible (f11) mods to tiles at f-port (DNB location) mods to CXRS systems new upper divertor probe array new cryopump Penning gauges repair Penning gauge cables install two new inner-wall scanning probes install new F-top MKS gauge refurbish outer divertor probe array install 10 halo Rogowskis upper divertor Mo source diag coverage mods clean or replace fast camera telescope replace fiber bundle inner wall telescope new GPI telescope on A-B shelf Thomson Scattering Upgrades Upgrade to HiReX Improve LH camera reliability

37 EOT