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5 results on '"Joisa, Y.S."'

1. Runaway electron mitigation with pulsed localized vertical magnetic field perturbation in ADITYA tokamak

Author

Tanna, R.L., primary, Patel, S., additional, Ghosh, J., additional, Chauhan, Chetna, additional, Amardas, A., additional, Chattopadhyay, P.K., additional, Jadeja, K.A., additional, Joisa, Y.S., additional, Nagora, U.C., additional, Atrey, P.K., additional, Chowdhuri, M.B., additional, Manchanda, R., additional, and Saxena, Y.C., additional

Published
2023
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2. Lanthanum Bromide (LaBr3(Ce)) based hard X-ray spectroscopic diagnostic for the study of runaway electrons at Aditya Tokamak

Author

Purohit, S., primary, Chowdhuri, M.B., additional, Joisa, Y.S., additional, Gupta, M.K., additional, Raval, J.V., additional, Nagora, U.C., additional, Atrey, P.K., additional, Pathak, S.K., additional, Jadeja, K.A., additional, Bhatt, S.B., additional, Gupta, C.N., additional, Tanna, R.L., additional, and Ghosh, J., additional

Published
2020
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4. Overview of operation and experiments in the ADITYA-U tokamak

Author

Tanna, R.L., primary, Raj, Harshita, additional, Ghosh, J., additional, Kumar, Rohit, additional, Aich, Suman, additional, Macwan, Tanmay, additional, Kumawat, D., additional, Jadeja, K.A., additional, Patel, K.M., additional, Kalal, M.B., additional, Varia, D.S., additional, Sadharakiya, D.H., additional, Bhatt, S.B., additional, Sathyanarayana, K., additional, Shukla, B.K., additional, Chattopadhyay, P.K., additional, Makawana, M.N., additional, Shah, K.S., additional, Gupta, S., additional, Ranjan, V., additional, Balakrishnan, V., additional, Gupta, C.N., additional, Panchal, V.K., additional, Edappala, Praveenlal, additional, Arambhadiya, B., additional, Shah, Minsha, additional, Raulji, V., additional, Chowdhuri, M.B., additional, Banerjee, S., additional, Manchanda, R., additional, Shukla, G., additional, Shah, K., additional, Dey, R., additional, Yadava, Nandini, additional, Patel, Sharvil, additional, Bisai, N., additional, Raju, D., additional, Atrey, P.K., additional, Pathak, S.K., additional, Nagora, U., additional, Raval, J., additional, Joisa, Y.S., additional, Kumar, Manoj, additional, Tahiliani, K., additional, Jha, S.K., additional, Gopalkrishana, M.V., additional, and Sen, A., additional

Published
2019
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5. Characterization of the plasma current quench during disruptions in ADITYA tokamak.

Author

Purohit, S., Chowdhuri, M.B., Ghosh, J., Joisa, Y.S., Raval, J.V., Jha, S.K., Raju, D., Jadeja, K.A., Manchanda, R., Gupta, M.K., Pathak, S.K., Gupta, C.N., Bhat, S.B., Tanna, R.L., Chattopadhyay, P.K., Saxena, Y.C., Sen, A., and team, ADITYA

Subjects
PLASMA currents, PLASMA instabilities, PLASMA temperature, ELECTRON plasma, ELECTROMAGNETIC forces, PLASMA boundary layers, GALACTIC halos
Abstract

The rate of plasma current-quench during tokamak plasma disruptions determines the electromagnetic forces on the in-vessel components/vacuum vessel. Also halo currents and rapid changes of poloidal field due to the plasma vertical displacement contribute to loads on vessel and in-vessel components and hence needs to be studied thoroughly to safeguard these tokamak peripherals. The plasma current quench occurrence during the spontaneous major disruption has been investigated for a set of ADITYA tokamak disrupted discharges and average plasma current quench and instantaneous current quench rates have been estimated. The fastest area-normalized plasma current (IP) quench time is observed to be ∼5 ms m−2. The estimated post disruption plasma electron temperatures (PDET) are observed to be ∼15–35 eV and proportional to area-normalized plasma current quench time. Further analysis of several disruptive discharges of ADITYA tokamak reveal that the current quench time is inversely proportional to the pre-disruptive values of edge safety factor, qa, and the current quench properties are strongly correlated with the prevailing pre-disruptive plasma magnetohydrodynamic (MHD) activities. For larger values of pre-disruptive qa, the larger island widths of m= 2 and m = 3 MHD modes leads to a significant overlap of these islands. Such an overlap along with the deeper locations of the islands inside the plasma column, as compared to discharges having smaller values of pre-disruptive qa, seems to facilitate the faster current quench. [ABSTRACT FROM AUTHOR]

Published
2020
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