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M Stamp, SEWG meeting, 23/3/07 1 02/07/2006 Diagnostic Gas Valve - GIM14 Important features: Single point gas injection, octant 5, in LBSRP – not toroidally.

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Presentation on theme: "M Stamp, SEWG meeting, 23/3/07 1 02/07/2006 Diagnostic Gas Valve - GIM14 Important features: Single point gas injection, octant 5, in LBSRP – not toroidally."— Presentation transcript:

1 M Stamp, SEWG meeting, 23/3/07 1 02/07/2006 Diagnostic Gas Valve - GIM14 Important features: Single point gas injection, octant 5, in LBSRP – not toroidally uniform Gas bottle in Torus Hall, with preset pressure (presently 1280mbar) (Relatively) non-perturbing to the plasma Viewed with a KS3 telescope.

2 M Stamp, SEWG meeting, 23/3/07 2 02/07/2006 Tile 3 Tile 1 Tile 4 Tile 5 Tile 6 Tile 8 (Tile 7 is hidden) Octant 5 divertor floor (photos from UMVP) 19/11/2006 GIM14 – single nozzle

3 M Stamp, SEWG meeting, 23/3/07 3 IVIS l-o-s calibration Telescope l-o-s

4 M Stamp, SEWG meeting, 23/3/07 4 Use of GIM14 GIM14 is not a piezo valve! It is pneumatic, and has a slow time response It is controlled by an ON time, and OFF time, and time window Minimum 1.5s ON is recommended (even so, first cycle just pressurises the line) Offline tests: First pulse = no gas Other pulses, long Time delays. Gas request Downstream pressure

5 M Stamp, SEWG meeting, 23/3/07 5 Use of GIM14 (plasma example) GIM14 is not a piezo valve! It is pneumatic, and has a slow time response It is controlled by an ON time, and OFF time, and time window Minimum 1.5s ON is recommended (even so, first cycle just pressurises the line) (1 sec in example below) LID3 (2 fringe density increase) Reservoir pressure Opening Request Survey spectometer data


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