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26th IAEA Fusion Energy Conference - IAEA CN-234

17–22 Oct 2016
Kyoto International Conference Center
Japan timezone

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Overview of SST-1 Up-gradation & Recent Experiments in SST-1

17 Oct 2016, 14:00
4h 45m
Kyoto International Conference Center

Kyoto International Conference Center

Takaragaike, Sakyo-ku, Kyoto 606-0001 Japan
Overview Poster OV - Overviews Overview Poster

Speaker

Dr Subrata Pradhan (Institute for Plasma Research)

Description

Steady State Superconducting Tokamak (SST-1) is a `operational’ experimental superconducting device since late 2013. Since last IAEA-FEC; SST-1 has been upgraded with Plasma Facing Components being installed and integrated in the vacuum vessel and is getting prepared towards long pulse operations in both circular and elongated configurations. The PFC integration has been completed in August 2015 and initial experiments have begun in SST-1 with circular plasma configurations. SST-1 offers a unique possibility of investigating long pulse discharges with large aspect ratio (> 5.5) compared to contemporary devices. Presently, SST-1 standard ohmic discharges are in excess of 100 KA with typical core density ~ 2 × 1019 m-3 and core electron temperatures ~ 500 eV having duration in excess of 300 ms. A 42 GHz ECR pre-ionization source at ~ 150 KW in 1.5 T central field breaks down the gas, the current starts up at ~ 1.3 MA/s in 60-80 ms in an induced field of ~ 0.3 V/m. These standard discharges demonstrate copious saw teething and MHD activities as the pulse progresses including NTM, mode locking and MHD characteristics. PFC equipped SST-1 has completed these basic experimental studies confirmed with simulations. These includes eddy currents influencing the NULL dynamics, field errors, equilibrium index evolutions, wall influencing plasma characteristics, plasma positions, plasma rotational and Tearing Mode characteristics including the island width and island growths etc. Presently, SST-1 is attempting at multi second long high aspect ratio plasma discharges by coupling the Lower Hybrid with the Ohmic plasma as well as with robust real time position and density controls. SST-1 device has been upgraded with a pair of internal coil aimed at effective fast plasma control and a pair of segmented coil aimed at controlling some of the rotational aspects of plasma including the RMPs and ELMs. Supersonic Molecular Beam Injection (SMBI) from both high field and low field sides and Pellets Injection Systems have also been added with several edge plasma diagnostics aimed at both density control and edge plasma turbulence studies. The up-gradation details including the planned ones, salient early plasma characteristics in large aspect ratio PFC equipped SST-1 plasma and future experimental plans towards long pulse operations in SST-1 will be elaborated in this paper.
Country or International Organization India
Paper Number OV/4-3Ra

Primary author

Dr Subrata Pradhan (Institute for Plasma Research)

Co-authors

Mr A Varadharajulu (Institute for Plasma Research) Dr Aashoo N Sharma (Institute for Plasma Research) Prof. Ajai Kumar (Institute for Plasma Research) Mr Ajay Kumar (Institute for Plasma Research) Mr Akhilesh K Singh (Institute for Plasma Research) Mr Amit Ojha (Institute for Plasma Research) Prof. Amita Das (Institute for Plasma Research) Mr Arun G Panchal (Institute for Plasma Research) Mr Arun Prakash A (Institute for Plasma Research) Mr Arvinkumar L Thakur (Institute for Plasma Research) Mrs Asha N Adhiya (Institute for Plasma Research) Mr Atish L Sharma (Institute for Plasma Research) Mr Atul Garg (Institute for Plasma Research) Mr Aveg Kumar (Institute for Plasma Research) Mr Azadsinh R Makwana (Institute for Plasma Research) Mr Bhadresh R Praghi (Institute for Plasma Research) Mrs Bhumi Chaudhari (Institute for Plasma Research) Mr Braj Kumar Shukla (Institute for Plasma Research) Mr Chet Narayan Gupta (Institute for Plasma Research) Mr Chetan G Virani (Institute for Plasma Research) Dr Daniel Raju (Institute for Plasma Research) Mr Dashrath P Sonara (Institute for Plasma Research) Mr Debashis Ghosh (Institute for Plasma Research) Mr Devenkumar H Kanabar (Institute for Plasma Research) Prof. Dhiraj Bora (Institute for Plasma Research) Mr Dikens R Christian (Institute for Plasma Research) Mr Dilip C Raval (Institute for Plasma Research) Mr Dinesh Kumar Sharma (Institute for Plasma Research) Mr Firozkhan S Pathan (Institute for Plasma Research) Mr G L N Srikanth (Institute for Plasma Research) Mr Gattu Ramesh Babu (Institute for Plasma Research) Mr Gaurang I Mahsuria (Institute for Plasma Research) Mr Harish Masand (Institute for Plasma Research) Mr Hiren D Nimavat (Institute for Plasma Research) Mr Hitesh H Chudasma (Institute for Plasma Research) Mr Hitesh Kumar Gulati (Institute for Plasma Research) Mr Hitesh S Patel (Institute for Plasma Research) Mr Imran A Mansuri (Institute for Plasma Research) Mr J C Patel (Institute for Plasma Research) Mr Jasraj R Dhongde (Institute for Plasma Research) Mr Jayesh V Raval (Institute for Plasma Research) Mr Jinto Thomas (Institute for Plasma Research) Mr Kalpesh J Doshi (Institute for Plasma Research) Mr Kalpeshkumar R Dhanani (Institute for Plasma Research) Mr Ketan M Patel (Institute for Plasma Research) Mr Kirankumar G Patel (Institute for Plasma Research) Mr Kirankumar K Ambulkar (Institute for Plasma Research) Mr Kiritkumar B Patel (Institute for Plasma Research) Mrs Kirti Mahajan (Institute for Plasma Research) Mrs Kumudni Asudani (Institute for Plasma Research) Mr M V Gopalakrishna (Institute for Plasma Research) Mrs Manika Sharma (Institute for Plasma Research) Mrs Manisha K Bhandarkar (Institute for Plasma Research) Dr Manoj Kumar (Institute for Plasma Research) Mr Mohammad Shoaib Khan (Institute for Plasma Research) Mrs Moni Banaudha (Institute for Plasma Research) Mr Murtuza M Vora (Institute for Plasma Research) Mrs Nilam K Ramaiya (Institute for Plasma Research) Mr Nitin Bairagi (Institute for Plasma Research) Mr Pabitra Kumar Mishra (Institute for Plasma Research) Mr Pankaj Varmora (Institute for Plasma Research) Mr Pankilkumar Shah (Institute for Plasma Research) Mr Paresh J Patel (Institute for Plasma Research) Mr Parveen Kumar Atrey (Institute for Plasma Research) Mr Prabal Biswas (Institute for Plasma Research) Mr Pradeep K Chauhan (Institute for Plasma Research) Mr Pradip N Panchal (Institute for Plasma Research) Dr Pramod K Sharma (Institute for Plasma Research) Mr Pramod R Parmar (Institute for Plasma Research) Mr Prashant L Thankey (Institute for Plasma Research) Mrs Pratibha Semwal (Institute for Plasma Research) Mr Prosenjit Santra (Institute for Plasma Research) Dr R Srinivasan (Institute for Plasma Research) Mr Rajiv Sharma (Institute for Plasma Research) Mrs Rajwinder Kaur (Institute for Plasma Research) Mr Rakeshkumar J Patel (Institute for Plasma Research) Mrs Ranjana Manchanda (Institute for Plasma Research) Prof. Ratneshwar Jha (Institute for Plasma Research) Mr Rohitkumar N Panchal (Institute for Plasma Research) SST-1 Team (Institute for Plasma Research) Mrs Saifali Dalakoti (Institute for Plasma Research) Mr Sameer Kumar (Institute for Plasma Research) Dr Sanjay V Kulkarni (Institute for Plasma Research) Mr Shishir Purohit (Institute for Plasma Research) Mr Shwetang N Pandya (Institute for Plasma Research) Mr Siju George (Institute For Plasma Research) Mr Snehal P Jayaswal (Institute for Plasma Research) Mrs Snehlata Gupta (Institute for Plasma Research) Mr Subrata Jana (Institute for Plasma Research) Mr Suraya Kumar Pathak (Institute for Plasma Research) Mr Tejas J Parekh (Institute for Plasma Research) Mr Tusharkumar Y Raval (Institute for Plasma Research) Mr Umeshkumar C Nagora (Institute for Plasma Research) Mr Upendra Prasad (Institute for Plasma Research) Mr Varsha Siju (Institute for Plasma Research) Dr Vipul L Tanna (Institute for Plasma Research) Mr Vishnu K Chaudhari (Institute for Plasma Research) Mr Y Shankara Joisa (Institute for Plasma Research) Mr Yohan S Khristi (Institute for Plasma Research) Mr Yuvakiran Paravastu (Institute for Plasma Research) Dr Ziauddin Khan (Institute for Plasma Research)

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