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New MPTS Analysis for 2008

New MPTS Analysis for 2008. B.P. LeBlanc PPPL 22-DEC-2008. MPTS Run for 2008. Polarizer in place for the first time Reduces background radiation, but saturation remains a problem First run with in-situ window calibration Window coating observed and measured Two laser shutdowns

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New MPTS Analysis for 2008

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  1. New MPTS Analysis for 2008 B.P. LeBlanc PPPL 22-DEC-2008 BPL_22DEC08_1

  2. MPTS Run for 2008 • Polarizer in place for the first time • Reduces background radiation, but saturation remains a problem • First run with in-situ window calibration • Window coating observed and measured • Two laser shutdowns • Measures now in place to improve reliability • Phase-3 calibration done after the run • New analysis performed BPL_22DEC08_2

  3. New MPTS Analysis for 2008 • Phase-3 channel calibration for 2008 • Change Te @R=54.5cm • Software modification to add extra time points under background light saturation • In-situ window calibration • Increase ne about 10% at end or run • Increase Te within error bar • Valid array (ntime, nrad) • Valid>0 means ok BPL_22DEC08_3

  4. Phase-3 2008 CalibrationMain change seen at R=54.5cm BPL_22DEC08_4

  5. Background Light SaturationSignal hits digitalization maximum BPL_22DEC08_5

  6. Software Modification for Saturation Condition BPL_22DEC08_6

  7. What Happened after 0.6s?Neutron signal consistent with Te drop BPL_22DEC08_7

  8. Output Array VALID (ntime,nrad)Has same dimensions as Tef, etc. • VALID=1 c2 ok • VALID=2 c2 ok with background sat • VALID=3 c2 ok,but with bckgd-sat “repair” • VALID=-1 c2 too high • VALID=-2 c2 too high with bckgd sat • VALID=-4 c2 ok, but dTe > Te BPL_22DEC08_8

  9. Effects of in-situ Window CalibrationLast run day shot 130730 @0.49s Valid Te increase within error bar ne increase about about 10% BPL_22DEC08_9

  10. Window Coating Correction and Saturation Remedial BPL_22DEC08_10

  11. Effects of in-situ Window CalibrationLast run day shot 130730 @1.22s Valid BPL_22DEC08_11

  12. Effects of in-situ Window CalibrationLast run day shot 130730 around 1.2s New time point Valid BPL_22DEC08_12

  13. Valid Array is Part of MPTS Outputts function has been modified IDL> help,ts(130730),/str "Best" analysis is of "Preliminary" quality ** Structure <93cdd7c>, 20 tags, length=131644, data length=131642, refs=1: SHOT LONG 130730 TIME FLOAT Array[31] RADIUS FLOAT Array[30] DR FLOAT Array[30] TEF DOUBLE Array[31, 30] NEF DOUBLE Array[31, 30] PEF DOUBLE Array[31, 30] DTEF DOUBLE Array[31, 30] DNEF DOUBLE Array[31, 30] DPEF DOUBLE Array[31, 30] RS FLOAT Array[101] TES DOUBLE Array[31, 101] NES DOUBLE Array[31, 101] PES DOUBLE Array[31, 101] LD DOUBLE Array[31] LASER INT Array[37] RR DOUBLE Array[37, 30] VALID INT Array[31, 30] DATE_AN STRING 'Mon Jul 14 16:17:37 2008' COMMENT STRING 'ldc=11 ldr=11 sph=1 002x geom:[Ishelf[0:15'... IDL> BPL_22DEC08_13

  14. Valid_viewer Application (1) Phase 1 Phase 2 Phase 3 BPL_22DEC08_14

  15. Valid_viewer Application (2) Phase 1 Phase 2 Phase 3 BPL_22DEC08_15

  16. Valid_viewer Application (3) Phase 1 Phase 2 Phase 3 BPL_22DEC08_16

  17. Concluding Remarks • New analysis will be loaded to MDS soon • During the Holidays • Valid array • Valid > 0 indicates ok, • but caveat emptor when valid=3 • Window coating effects were corrected based on the in-situ calibration • Effects seen at end of the run on Te and ne • Correction meaningful at the of the run BPL_22DEC08_17

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