1 / 5

Tore Supra experience in SHAD and results CEA project: SHAD for JET ILA

SHAD ( Sub-Harmonic Arc Detector) Project for the ICRH TS Antennae and JET ILA (ITER Like Antenna). G.BERGER-BY with the TS and JET ICRH teams. Tore Supra experience in SHAD and results CEA project: SHAD for JET ILA Expected results on ILA in JET Required developments in progress.

dara
Download Presentation

Tore Supra experience in SHAD and results CEA project: SHAD for JET ILA

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. SHAD ( Sub-Harmonic Arc Detector) Project for the ICRH TS Antennae and JET ILA (ITER Like Antenna) G.BERGER-BY with the TS and JET ICRH teams • Tore Supra experience in SHAD and results • CEA project: SHAD for JET ILA • Expected results on ILA in JET • Required developments in progress

  2. Tore Supra experience and results with the ICRH team • TS work program in 1999 with IPP Garching • 4 improvements to the Garching system have been developed on the first prototype in 2001 - Auto-test system (10MHz) - Industrial filters (JET 5/20MHz) 80 dB rejection - Logarithmic detection to increase the adjustment possibilities - Optic fiber for the connection to the trip system (fast, immunity) • Industrial manufacturing of 3 racks in 2002 in France • Used on the TS antennae since 2002 without modification and without failure • Since 2005 the 3 TS antennae are protected with SHAD in redundancy • Used with very large success on the TS ITER Like antenna on test bed commissioning and on 2007 plasma campaign • Experience of using 4 safety systems (Generator Vr/Vf, antenna Vr/Vf, SHAD, optic systems for the TS ILA is that SHAD has been very useful and has been high sensibility for arcs detection

  3. ITER-Like Antenna Prototype : Sub-Harmonic Arc Detection SHAD Arc detection system based on sub-harmonic detection (installed on the JET-EP antenna)‏ Arc detection signal (10ms) Reaction time <10s The classical safety system based VSWR measurement was also used as a fall-back system (triggering only a few times in operation)‏ Thanks to K.Vulliez (JET talk on January 23th 2008)

  4. 2) CEA project: SHAD for JET ILA • 2 racks with 2 independent channels (4 lines to supply the ILA) • Same CEA principle with industrial manufacturing in France (2006 4th Quarter) • Delivery to JET in January 2007 with all the documentation • Tests expected in 2007 on the test bed, but delayed because technical problems during the 4th strap commissioning (just some preliminary tests have been made) • Full commissioning on the ILA expected in the first Half-yearly 2008 • phase 1: Multipactor and vacuum (April) • phase 2: Plasmas in L mode (May) • phase 3: Plasmas with ELMs in H mode (June)

  5. 3) Expectedresults on ILA in JET • Noise measurements with spectrum analyser • Fast acquisition (200 kHz) and fast triggers • Spectrum analysis with fast oscilloscope (TS=5GS/s) and FFT calculation • Full collaboration between TS, ASDEX and JET will be useful • Comparison VSWR, with 2 different systems SHAD, SMAD (Sensibility, delay, immunity) • Sensitivity of the SHAD in ELMs plasmas (no tested on TS) • This technique could be used on ITER ? • How to manage different systems in order to increase safety without decrease the availability? 4) Required developments in progress

More Related