Tests on TS samples at a laboratory scale of:

1. Laser detritiation technique focus on :• layer removal • Castellations treatments• Dust control and removal

2. Test of thermal response of layers (layer characterisation)

3. Test of Laser Induced Breakdown Spectroscopy (LIBS) (layer composition)

Comprehensive Goal :• Prepare the installation of these techniques on the AIA

H. Roche, C Grisolia

Ab so rb e ur

La se r fib ré p ulsé Ytte rb ium

Alim . la se r 24V 10A

Un ité c o ntrô le / c o m m a nd e la se r

Alim e n ta tio n & c o ntrô leTê te g a lva X - Y

PC d e c o ntrô le - c o m m a nd e

M o nite u r d e c o ntrô le

M iro ir 99%

C C D d e visua lisa tio n

Tê te g a lva . X - Y

Aig uille LPT

Ablation, thermal response & LIBS: lab studies (resp. H Roche)

Ablation:System already existing(first trials in 3-4 months)To be coupled with characterisation (X Courtois)

Thermal response:Detector etc. ok Need to be installed And tested(on-going effort in Saclay)

LIBS:Need of spectrometer(could be borrow from Saclay)Need to be installed And tested

Pyrometer

Needs

• 2 LPT fingers needed with deposited areas (bridges welcome)

• No need of hardware except for LIBS (spectro to be borrowed)

• Very small budget in 2007 (less than 5 k€)

• PPY : ok (at least 6 months of work)

AblationCEA (Saclay), UKAEA, TEKES

Thermal response (layer characterisation)CEA Saclay, CEA Cadarache

Thermal response (layer characterisation)tests of layer removal in Tore Supra foreseen in 2007 couple with lock in thermography studies.Procedure : lock in characterisation + laser ablation + lock in characterisation

alim. laser 24V 10A Unité contrôle/ commande laser alim.

CCD

Hall Tore

Enceinte de Tore Supra

Bâti intermédiaire

Plaque de protection

laser

miroir

Tête galvano-métrique

aiguilles

poutre

Camera CCD

Bâti fixe

laser pulsé fibré Ytterbium

Moniteur de contrôle Carte et alimentation

de la tête galvano-métrique

LIBS (layer composition + feedback control on the ablation process)

CEA SaclayOngoing studies at JET

AIA

Detritiation +Heating +LIBSTool(s)