NSTX dynamic structural responses to disruptions could be measured by expanding the existing TFJ_FISO system R. Woolley 13 January 2010

Existing FISO system: Is part of TFJ system –installed after 2003 TF joint failure arc/fire 27 selectable FISO sensors are patched into 8 channels FISO signal conditioning which drives 8 channels of 2 khz 16 kilosample digitizers Special software keeps track of patched sensors Existing sensors all on top or bottom of NSTX 27 channels of FISO sensors & optical caples PATCH PANEL SIGNAL CONDITIONING 8 channels DIGITIZERS 2 khz/chan 16 ksample/chan

8 channels FISO data are recorded each shot & archived automatically FISO histories easily retrieved for any shot

Special software exists to track FISO patching: TF Scope Plotting Web Tool (for various "canned" TF Joint Resistance plots) F Scope Plotting Web Tool There is HELP on NSTX Joint Monitoring.HELP on NSTX Joint Monitoring TF Joint Monitoring Tools TF Spare Tracking Tools FISO Tracking Tools TF Joint Trend-Only Monitoring TF Joint Trend-Only Monitoring TF Spare Channel Entry FISO Entry TF Joint Monitor Log File Search TF Spare Channel Entries Search TF Spare Channel Entries Search FISO Entries TF Joint Monitoring Control TF Joint Monitoring Control TF Joint Monitoring

FISO’s displacement sensors Fiber Optic Sensors - Displacement Suitable for various applications such as monitoring of electrical components, structural monitoring and rock mechanics, our fiber optic linear position and displacement sensors are immune to EMI and RFI, offer built-in safety for hazardous environments and provide high precision and high temperature operating range. Key features: - Up to 170° Celsius - Resolution of up to 0.002mm - 20 mm linear strokes FOD Range: 20 mm (0.8 in linear stroke) Accuracy: ±0.002 mm ( in linear stroke) Resolution: mm ( in linear stroke) See product datasheetSee product datasheet

FISO contacted for price info FISO Technologies -Fiber Optic Sensors & Solutions SALES CHANNELS FISO Technologies FISO (head office) 500 St-Jean-Baptiste, suite 195 Québec, QC, G2E 5R9 CANADA Tel.: Fax : Technologies -Fiber Optic Sensors & Solutions SALES CHANNELS FISO Technologies FISO (head office) 500 St-Jean-Baptiste, suite 195 Québec, QC, G2E 5R9 CANADA Tel.: Fax :

FOD prices (from telecon) Each sensor (with FL connector)$1315 Cable options: –LengthPrice –2 m$110 –5 m$125 –10 m$150 –25 m$205 No other costs required. 8 channels could be purchased for $12k.

INSTALLATION FOD sensors would need to be installed on fixed mounts adjacent to VV, in locations chosen to benchmark structural response predictions. Srinivas Avasarala provided the following plot which could guide selection of installation locations: