ISTP (and other…) UpdateISTP (and other…) Update

Stefan Gerhardt

NSTX-U Monday Physics MeetingFeb. 20, 2015

B318

NSTX-UNSTX-U Supported by

Culham Sci CtrYork U

Chubu UFukui U

Hiroshima UHyogo UKyoto U

Kyushu UKyushu Tokai U

NIFSNiigata UU Tokyo

JAEAInst for Nucl Res, Kiev

Ioffe InstTRINITI

Chonbuk Natl UNFRI

KAISTPOSTECH

Seoul Natl UASIPP

CIEMATFOM Inst DIFFER

ENEA, FrascatiCEA, Cadarache

IPP, JülichIPP, Garching

ASCR, Czech Rep

Coll of Wm & MaryColumbia UCompXGeneral AtomicsFIUINLJohns Hopkins ULANLLLNLLodestarMITLehigh UNova PhotonicsORNLPPPLPrinceton UPurdue USNLThink Tank, Inc.UC DavisUC IrvineUCLAUCSDU ColoradoU IllinoisU MarylandU RochesterU TennesseeU TulsaU WashingtonU WisconsinX Science LLC

NSTX-UNSTX-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

NSTX-UNSTX-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.

NSTX-UNSTX-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 OperationBakeout CommissioningCD4

Apr. 2015 May 2015 June 2015 July 2015

MPTS R&R

ISTP

pre-bake-out MPTS

NSTX-UNSTX-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.– 2nd 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 OperationBakeout CommissioningCD4

Apr. 2015 May 2015 June 2015 July 2015

MPTS R&R

ISTP

pre-bake-out MPTS