NSTXNSTX Supported by

NSTX Centerstack Upgrade Project MeetingP. Titus May 25 2011

TF Temperatures

LLD Disruption Analysis

Lower Secondary Passive Plate Disruption with Support Struts

127

114.5

102

89.5

77

64.5

52

39.5

27

14.5

2

127

114.5

102

89.5

77

64.5

52

39.5

27

14.5

2

TF current diffusion analysis (normal operation pulse)Near upper flag:Max: 112°C (a little below the corner)Corner temperature is 111°C.Near lower flag:117°C

Temperature (C)

Add more material here

no cooling during pulse(0~10.136s)

Add cooling during pulse (0~10.136s), 0.25” tube, 3m/s, inlet temp 12 °COnly two small areas have temperature >101°C

6”

2”

Near lower flag:Max: 113.4°C

Near upper flag:Max: 110.8°C

Temperature (C)

From Han:

113°C and 110°C are at EOFT, please see the attached ppt. Total pulse length is 10.136s, flat top ends at 9.512s. After flat top, the temps lower down a little because less heat produced from current and the temps re-distribute (heat transfers to low temp components)

Finesse the TF Current Profile i.e drop it a bit at the end or at the beginning –Do you need full field at these times?

Shorten the TFC Current Profile

Test the CTD 425 to 115 degrees C. Degradation Between 80 and 100C is Small

Accept as-is – Assume De-Bond in Small Regions where Temps are Above 100C

Step FX FY FZ36 593 2205 65637 -244, -163 -10838 318 -1749 54139 -1325 -4743 -57940 8.4 -4031 989

Step FX FY FZ37 -138, -1067 14238 427 2341 12939 406 -1258 10240 262 3318 7.8

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