NSTX NSTX NSTX PAC-25 – Background info (Menard) February 18, 2009 1 NSTX FY2009-11 Research Milestones (base and incremental ) Expt. Run Weeks: 1)Transport & Turbulence 2)Macroscopic Stability 3)Boundary Physics 4)Wave-Particle Interaction 5)Solenoid-free start-up, ramp- up 6)Advanced Scenarios & Control Joint Research Targets (3 US facilities): FY2010 FY2009 FY2011 14 (20) 15 (20) 15 (20) Understand physics of RWM stabilization & control vs. rotation Study how j(r) is modified by super-Alfvénic ion- driven modes Perform high-elongation wall-stabilized operation at lower n e Study turbulence regimes responsible for ion and electron energy transport (formerly FY2010) Assess H-mode characteristics as a function of collisionality and lithium conditioning Particle control and hydrogenic fuel retention TBD (…Characterize H-mode pedestal structure…) Improve understanding of the heat transport in the scrape- off layer Relationship between lithiated surface conditions and edge and core plasma conditions Assess predictive capability of mode-induced fast-ion transport Dependence of integrated plasma performance on collisionality (FY2010 incremental accelerates this by 1yr if LLD and/or HHFW achieve FY2010 goals) Characterize HHFW heating, CD, and ramp-up in deuterium H-mode Joint milestone w/ solenoid-free TSG Assess sustained operation above the no- wall limit at reduced collisionality Assess sustainable beta and disruptivity near and above the ideal no-wall limit. Integrate MHD mode modification of j(r) into optimized operation
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NSTXNSTX NSTX PAC-25 – Background info (Menard) February 18, 2009 1
NSTX FY2009-11 Research Milestones(base and incremental )
Expt. Run Weeks:
1) Transport & Turbulence
2) Macroscopic Stability
3) Boundary Physics
4) Wave-Particle Interaction
5) Solenoid-free start-up, ramp-up
6) Advanced Scenarios & Control
Joint Research Targets (3 US facilities):
FY2010FY2009 FY201114 (20) 15 (20) 15 (20)
Understand physics of RWM stabilization & control vs. rotation
Study how j(r) is modified by super-Alfvénic ion-driven modes
Perform high-elongation wall-stabilized operation at lower ne
Study turbulence regimes responsible for ion and electron energy transport (formerly FY2010)
Assess H-mode characteristicsas a function of collisionality and lithium conditioning
Particle control and hydrogenic fuel retention
TBD (…Characterize H-mode pedestal structure…)
Improve understanding of the heat transport in the scrape-off layer
Relationship between lithiated surface conditions and edge and core plasma conditions
Assess predictive capability of mode-induced fast-ion transport
Dependence of integrated plasma performance on collisionality(FY2010 incremental accelerates this by 1yr if LLD and/or HHFW achieve FY2010 goals)
Characterize HHFW heating, CD, and ramp-up in deuterium H-mode
Joint milestone w/ solenoid-free TSG
Assess sustained operation above the no-wall limit at reduced collisionality
Assess sustainable beta and disruptivity near and above the ideal no-wall limit.
Integrate MHD mode modification of j(r) into optimized operation
NSTXNSTX NSTX PAC-25 – Background info (Menard) February 18, 2009 2
FY09-11 upgrades support highestpriorities and enable key research thrusts:
2. Implement BES to complement existing high-k scattering diagnostic
1. Implement liquid lithium divertor for pumping, and investigate other potential benefits:– Improved confinement– Reduction/elimination of ELMs– Compatibility of LLD with high flux expansion – Longer-term: steady-state high-heat-flux handling
Liquid Lithium Divertor (LLD)
3.Upgrade HHFW system for higher PRF + ELM resilience– Determine if HHFW can ramp-up IP in H-mode (BS+RF overdrive)– Determine if HHFW can heat high-N advanced H-mode scenarios – HHFW/ICRF also important for NHTX/CTF/ITER
– Measure full wavenumber spectrum of turbulence (also *AE eigenfunction)– Determine modes responsible for anomalous transport of energy & momentum
4.Implement MSE-LIF for pitch angle and |B| w/o heating beam– Greatly expanded research flexibility, reconstruct fast-ion p (from total – thermal)
NSTXNSTX NSTX PAC-25 – Background info (Menard) February 18, 2009 3
FY 09 FY 10 FY 11Run Weeks
Base / Increment IncrementIncrement14 14 6 614 6
NSTX Upgrade PlanStrong Collaboration Components
CHI
Boundary
LLD (SNL)LLD (SNL)Dual Li ShakerDual Li Shaker
Heating & CD
Energetic Particles
HHFW Antenna Upgrade HHFW Antenna Upgrade HHFW ELM Resilience (ORNL)HHFW ELM Resilience (ORNL)
• Main Upgrades' Cost and Schedule will be reviewed by Engineering Management
NSTXNSTX NSTX PAC-25 – Background info (Menard) February 18, 2009 44
Upgraded Antenna Main Features
HHFW Double-Feed Antenna UpgradeTo Double Injected Power and Couple to H-mode with ELMs
Present Feed
NewFeed
Present Ground
New Ground
Antenna Straps
New antenna straps
J. Hosea, R. Ellis
• Symmetric feed• Ground at antenna mid-plane• Maximum radiation at mid-plane• Voltage at feed-thru reduced by ~ 1.4• Power capability should be up by ~ 2
• Mid-plane "hard" ground implemented due to concern for a ceramic insulator based support against disruptive loads.
• External loops will be installed as soon as possible, early in the FY 09 run at high priority
• "ELM Resilience" system will be implemented in FY 10 in collaboration with ORNL. ELM detection- shut-down approach and/or hybrid couplers
Antenna Installation is completed
NSTXNSTX NSTX PAC-25 – Background info (Menard) February 18, 2009
LLD-1 80° SEGMENT
GRAPHITE DIAGNOSTIC
TILES
* SNL has 3 plates ready for brazing
• SNL Status
- 3 plates machined. Brazing to be done 1/20/09. Will ship first 2 of 6 plates for Moly coating 1/30/09. Arrival at PPPL 2/15-16/09.
- Remaining 4 plates will ship for Moly coating 2/16/09. Arrival at PPPL 3/01-07/09. (only 4 plates to be installed).
- Control Rack design being completed. Parts being purchased. Software starting. Control Rack delivery 3/30/09.
• PPPL Status
- Aluminum prototype made by step-bending accurate to 0.007”. Will proceed to complete Moly coated Cu plate.
- Active engineering of interfaces and diagnostic sensors in progress.
- Li testing off-line with prototype LLD surfaces in progress.
Liquid Lithium Divertor (LLD) for FY 10Manufacturing of LLD plates more challenging than originally
anticipated
To be installed in August 2009
NSTXNSTX NSTX PAC-25 – Background info (Menard) February 18, 2009
• GAP-B Tile (PPPL Student+ UIUC) - 99 Langmuir Probes (33 sets of 3 toroidal rows) [UIUC triple probe electronics]• GAP-E Tile (Zweben) - 2 BEAP bias electrodes - 2 TC (in IR Camera FOV) - 5 Langmuir Probes
• Using Existing electronics• GAP-H Tile (Gerhardt) - 5 2D magnetic sensors for control - 2 TC (in IR Camera FOV)
• Using Existing electronics• GAP-K Tile (Zweben) - 2 BEAP bias electrodes - 5 Langmuir Probes - 2 TC (in IR Camera FOV)
• Graphite tile transition regions between segments contain thermocouples, Langmuir probes, and magnetic & current sensors
LLD Diagnostic Tile SensorsNSTX PAC Recommended Adequate Diagnostic Capability for
LLD
Langmuir probe tile (Thesis research)LLD diagnostic scopes are being re-examined to minimize the cost while retaining key capabilities
NSTXNSTX NSTX PAC-25 – Background info (Menard) February 18, 2009 77
BES Diagnostic Status:– BES viewing ports installed / lens being procured– U. Wisconsin manufacturing detectors to be delivered in two stages (16 & 16) to
be available for FY 10 run. – Cable trays and diagnostic room readied– Fiber procurement and fiber holder design being finalized for fabrication– Aiming to commission the full system in FY 10
Beam Emission Spectroscopy for FY 10
NSTXNSTX NSTX PAC-25 – Background info (Menard) February 18, 2009 8
Motional Stark Effect -Laser Induced Fluorescence (MSE-LIF) for FY 10 - 11
• A PDR for entire system held on 1/9/09
• Extension of mezzanine and relocation of two racks to make space for DNB completed during 2008 outage
• Design work for AC power services and cable tray complete
• The main PPPL tasks are: • reconfiguring an existing port on the vessel
for the DNB/laser flight tube,• modifying a port cover to accommodate a
new window and shutter for the viewing optics,
• providing AC power and water to DNB/laser, • resolving a number of interferences
(significant scopes)
• The main Nova Photonics tasks are: • reconfiguring the DNB for installation on the
NSTX platform, • design and fabrication of magnetic shielding
for beam, • take delivery of laser, and lab testing of
