Hydrogen retention comparison between LIBS and LIDQMS
- LIBS look into “second order” hydrogen band Littrow
- LIBS shorter delay shots could give number of particle in ground state using calibration free method
- Provide total number of atoms in plasma
- Salvatore evaluate number atoms per laser shot
- LIDQMS plot DT/HDT as an intermediate comparison (Anna) but ultimate aim is quantified data
- LIBS total DT/HDT ratio (Rongxing)
- Further efforts to focus on particular pulses (LIDQMS 855/856)/shots (LIBS 63)
- Jari – send out atomic density data from IBA for HFGC tile
LIBS quantification
- Consider calibration sample for VTT experiment
- There are “IAP samples” available
- Other samples that have IBA?
- Delay times with Littrow and Arielle will be investigated (as per JET experiment and shorter)
- LIBS establish set of lines for analysis (currently not unified)
- Include Avantes line for carbon at “900nm and something”
- Calibration free analysis
- Hydrogen concentration calculation – point 63
- 18 December LIBS meeting online
- Salvatore to show how data was treated
- Profilometery will be needed for ablation rate
LIDQMS quantification
Gennady
- gas puffs for pulse he showed at the meeting
- penning gauge analysis continued….
o H or D calibration for pennings in towers – some ambiguity of hydrogen isotope calibration
- RGA11 vs other RGAs? What pumping fraction is needed for RGA11?
- Other RGAs pumping fraction in 94%
Gas injection comparison of calibration methods
- Gennady and Gabriele to work on alternative calibration method
- 25/9 start with this (others to consider later 4/10 and 28/10 (?)
- Check pulses and data on those data (Anna/Ionut to circulate pulse numbers)
- Need to treat the data in same way as calibration
Comparison with jump method (Laura/Anna)
Conference and publications
- Jari – VTT LIBS experiment – PSI
- Jepu – RE damage on inner limiters – LIBS pulses required – PSI
- Indrek – LIBS IWGL (Poloidal 2X3 and 2X9, 2X17) pulse supporting information on exposure – potentially TDS results – PSI
- Gennady – Calibration procedure for LIBS – PSI
- Anna – comparison of LID-QMS fuel retention with predictions – Hydrogen workshop
- Laura – quantification of LID-QMS using ump method - Include 94%– publication & Hydrogen workshop
- Lidia/Salvatore – depth profiling of HFGC & Tile1using LIBS – PSI
- Pavel – Inner divertor calibration free analysis using LIBS – PSI
- Pavel – Averaging and selection on spectrscopic lines for LIBS analysis (Methodology) – EMSLIBS
- Miro – ex-situ LID-QMS on W-lammellae - PSI
Successes
- Analysis of pumping from Gennady brings LIDQMS closer to a quantified value
- Similar trends in fuel retention across tiles
- Quantification of LIBS using calibration free method
- First absolute HI value in similar order of magnitude to LIDQMS
- Machine learning algorithm progressed for HI
- LIBS depth profiling of each group is converging
Anna Widdowson
Antti Hakola
David Douai
Gabriele Gervasini
Gennady Sergienko
Giorgio Maddaluno
Ionut Jepu
Jari Likonen
Jelena Butikova
Jogi Indrek
laura Laguardia
Lidia Baiamonte
Mathilde Diez
Miroslaw Zlobinski
Pavel Veis
Pawel GASIOR
Rongxing yi
SAHITHYA ATIKUKKE
Sanath Shetty
stephane VARTANIAN
Yevhen Zayachuk