1. Trilateral Euregio Cluster Session plan for E 3.1.2. Intrinsic hydrocarbon yields and photon efficiencies Motivation Shot list (i) setup pulses (ii) C 2 H 4 and H 2 gas injections (iii) CD 4 and D 2 gas injections Previous attempts (see M. Stamp – TFE meeting 3.2.2004) S. Brezinsek, M. Stamp, A. Pospieszczyk, A. Meigs

2. Trilateral Euregio Cluster Motivation Chemical erosion yield  Determination of intrinsic hydrocarbon flux by means of an in-situ calibration with injection of hydrocarbons  Hydrocarbon flux  Methane family  Ethane family  Determination of conversion factors (D/XB-values): photon flux ~ particle flux  Dependence on the gas injection location and the strike point position  Reference discharges with H 2 / D 2 injection through the same GIMs!

3. Trilateral Euregio Cluster Shot list (setup pulse) PulseInjectionGasRef.ParametersStrike Point 1GIM 9, GIM 10 H2627272.5 T, 2.5 MA, 3 MW NBI, L-Mode Fixed (vt)Gas injection variation, Outer Divertor (PFR/SOL: GIM 9: 55.0 s – 59.5 s, GIM 10: 60.5 s – 65 s) 2GIM 9, GIM 10 C2H4627272.5 T, 2.5 MA, 3 MW NBI, L-Mode Fixed (vt)Gas injection variation, Outer Divertor (PFR/SOL: GIM 9: 55.0 s – 59.5 s, GIM 10: 60.5 s – 65 s) Setup pulses:  fuelling efficiency  density matching No success in the last session due to NBI problems!

4. Trilateral Euregio Cluster Shot list (C 2 H 4 puff and H 2 reference) PulseInjectionGasRef.ParametersStrike Point 3GIM 10C2H4627292.5 T, 2.5 MA, 3 MW NBI, L-Mode Sweep (ht–vt) (over GIM10/12) PFR Outer Divertor 4GIM 9C2H4627292.5 T, 2.5 MA, 3 MW NBI, L-Mode Sweep (ht–vt) (over GIM10/12) PFR / SOL Outer Divertor 5GIM 12C2H4627292.5 T, 2.5 MA, 3 MW NBI, L-Mode Sweep (ht–vt) (over GIM10/12) PFR / SOL Inner Divertor 6GIM 12H2627292.5 T, 2.5 MA, 3 MW NBI, L-Mode Sweep (ht–vt) (over GIM10/12) reference shot pulse 5 7GIM 9H2627292.5 T, 2.5 MA, 3 MW NBI, L-Mode Sweep (ht–vt) (over GIM10/12) reference shot pulse 4 8GIM 10H2627292.5 T, 2.5 MA, 3 MW NBI, L-Mode Sweep (ht–vt) (over GIM10/12) reference shot pulse 3 GIM 11 is not available in the moment!

5. Trilateral Euregio Cluster Pulse setup Scheme was successful in discharge # 62729 (C 2 H 4 in D plasma)  high clearance discharges  large sweep of strike points pulse 3 - 8 (2.5 MA) variable strike point position / constant gas puff through either GIM 9,10 or 12

6. Trilateral Euregio Cluster Previous attempts Now: C 2 H 4 injection into H! Discrimination between CH from the wall and from the C 2 H 4 break-up is difficult ! PFRSOL ht vt

7. Trilateral Euregio Cluster Shot list (CD 4 puff and D 2 reference) PulseInjectionGasParametersStrike point 9GIM 9, GIM10 CD42.5 T, 2.5 MA, 3 MW NBI, L-Mode sweep ht-vtSOL / PFR Outer Divertor (GIM 9: 55s-59.5s, GIM10: 60.5s – 65s) 10GIM 9, GIM10 CD42.5 T, 2.5 MA, 3 MW NBI, L-Mode sweep vt-htSOL / PFR Outer Divertor (GIM10: 55s–59.5s, GIM9: 60.5s – 65s) 11GIM 9, GIM10 D22.5 T, 2.5 MA, 3 MW NBI, L-Mode sweep ht-vtSOL / PFR Outer Divertor (GIM 9: 55s-59.5s, GIM10: 60.5s – 65s). Reference pulse for 9 12GIM 9, GIM10 D22.5 T, 2.5 MA, 3 MW NBI, L-Mode sweep vt-htSOL / PFR Outer Divertor (GIM10: 55s–59.5s, GIM9: 60.5s – 65s). Reference pulse for 10 Now: CD 4 injection (  CD4 =2x10 21 s -1 ) into a H plasma! Discrimination between CH from the wall and from the CD 4 break-up might be possible !

8. Trilateral Euregio Cluster Diagnostic settings pulseinjectionGasKMEKS3AKS3BKT3AKT3BKT3C 1GIM 9,10H2O7O7 is lostCD A-X band C2 Swan bandC2 Philipps and CI 2GIM 9,10C2H4O7O7 is lostCD A-X band C2 Swan bandC2 Philipps and CI 3GIM 10C2H4O7O7 is lostCD A-X band C2 Swan bandC2 Philipps and CI 4GIM 9C2H4O6NormalCD A-X band C2 Swan bandC2 Philipps and CI 5GIM 12C2H4I5NormalCD A-X band C2 Swan bandC2 Philipps and CI 6GIM 12H2I5NormalCD A-X band C2 Swan bandC2 Philipps and CI 7GIM 9H2O6NormalCD A-X band C2 Swan bandC2 Philipps and CI 8GIM 10H2O7O7 is lostCD A-X band C2 Swan bandC2 Philipps and CI 9-10GIM 9,10CD4O7O7 is lost CD/ D  CD B-X bandCD A-X bandC2 Philipps and CI 11-12GIM 9,10D2O7O7 is lost CD / D  CD B-X bandCD A-X bandC2 Philipps and CI KME: 4.3 s or 6.3 s exposure time, full spectrum from 382 nm - 680 nm, all fibres 100% KS3A: standard settings KS3B: CD A-X band settings: 430.3 nm and 500 ms exposure time, D  standard settings KT3A: CD A-X band settings: 431.2 nm and 250 ms exposure time – 1200 grating CD B-X band setting: 390.5 nm and 250 ms exposure time – 1200 grating KT3B: C2 d-a band (  v=0) settings: 504.0 nm and 250 ms exposure time – 1200 grating CD A-X band settings: 429.0 nm and 250 ms exposure time – 1200 grating KT3C: CI settings: 875 nm and 250 ms exposure time – 600 grating KL1: standard settings: time window between 55 s –65 s and KY4D, KY3, KY6, KE9D, KB1, KT2/4