1. ISTP (and other…) Update Stefan Gerhardt NSTX-U Monday Physics Meeting Feb. 20, 2015 B318 NSTX-U Supported by Culham Sci Ctr York U Chubu U Fukui U Hiroshima U Hyogo U Kyoto U Kyushu U Kyushu Tokai U NIFS Niigata U U Tokyo JAEA Inst for Nucl Res, Kiev Ioffe Inst TRINITI Chonbuk Natl U NFRI KAIST POSTECH Seoul Natl U ASIPP CIEMAT FOM Inst DIFFER ENEA, Frascati CEA, Cadarache IPP, Jülich IPP, Garching ASCR, Czech Rep Coll of Wm & Mary Columbia U CompX General Atomics FIU INL Johns Hopkins U LANL LLNL Lodestar MIT Lehigh U Nova Photonics ORNL PPPL Princeton U Purdue U SNL Think Tank, Inc. UC Davis UC Irvine UCLA UCSD U Colorado U Illinois U Maryland U Rochester U Tennessee U Tulsa U Washington U Wisconsin X Science LLC

2. NSTX-U Update… (4/20/2015) CD-4 Requirements 50 kA plasma –Penultimate activity is ISTP-001, “NSTX-U Coil Energization Tests” –Then go to XMP-100 40 kV beam into the armor –Handled via startup and conditioning beam procedures 2

3. NSTX-U Update… (4/20/2015) Solid Progress Being Made on Both Fronts ISTP-001 –Started last Thursday –Have run all coils at 10% and 50% of their CD-4 limits –Have run most coils at 100% of their CD-4 limits Includes 65 kA TF. –Demonstrated I^2t, overcurrent, overtime trips of various types. –Using these shots to correct many many magnetics issues. Final commissioning of the gas delivery/injection system is maybe the final hurdle at this point. –Significant progress made over the weekend, but still at least a few full shifts of work NB #2 source B is now HV conditioning towards to 40 kV beam target. –Some setbacks on 2A and 2C.

4. NSTX-U Update… (4/20/2015) What about after CD-4? That is, after BOTH the Plasma and NBI milestones are met. Commit resources to completing key MPTS tasks before the bakeout…target 1 week. Spend most of May on the bakeout. ISTP, MPTS R&R, commissioning in later May and June. Research ops in July and onward. Many background engineering tasks during this time. –More dummy load testing. –Gas injection systems –Control system work Research Plasma Operation BakeoutCommissioning CD4 Apr. 2015May 2015June 2015July 2015 MPTS R&R ISTP pre-bake-out MPTS

5. NSTX-U Update… (4/20/2015) You may ask… What about access to the NTC? –Very restricted access during bakeout –Very restricted access during MPTS R&R, or other times when the laser is firing. –2 nd shift access during this and the next ISTP. –Weekend access. –Sporadic first shift access…coordinate with Al is your best bet. Opportunities arise if you are ready to take advantage of them –Maintenance weeks What does it take to get work done? –Most tasks can be done on a D-Site work permit. –Many tasks can be done under the “reinstall what was taken off” work package. –Only major new work requires a “blue folder”. –Plan your work a few days in advance ( and ASAP)…it can take a few days to get work permits approved. Don McBride can help with the permits and procedures (but note he works Mon-Wed). Research Plasma Operation BakeoutCommissioning CD4 Apr. 2015May 2015June 2015July 2015 MPTS R&R ISTP pre-bake-out MPTS