Explanipedia

Magnetohydrodynamic instability modulated runaway electron losses in the ADITYA-U tokamak Open

Sharvil Patel, M.B. Chowdhuri, Shishir Purohit, Tanmay Macwan, Kaushlender Singh , et al. · 2025

In the ADITYA-U tokamak, modulation in the Hard x-ray (HXR) emission from the limiter synchronous with a m/n = 2/1 tearing mode is observed during the flat-top and pre-disruption phases of a discharge with a significant runaway electron (R…

Erratum: “A multi-purpose reciprocating probe drive system for studying the effect of gas-puffs on edge plasma dynamics in the ADITYA-U tokamak” [AIP Adv. 15, 055301 (2025)] Open

Kaushlender Singh, Bharat Hegde, Ashok K. Kumawat, Ankit Kumar, M. S. Khan , et al. · 2025

Identification and Characterization of a New Disruption Regime in ADITYA-U Tokamak Open

S.P. Banerjee, Harshita Raj, SK Injamul Hoque, Komal Yadav, Sharvil Patel , et al. · 2025

Disruptions continue to pose a significant challenge to the stable operation and future design of tokamak reactors. A comprehensive statistical investigation carried out on the ADITYA-U tokamak has led to the observation and characterizati…

Real-time vertical position estimation of the plasma column using fast imaging in the Aditya-U tokamak Open

Suman Aich, Sharvil Patel, Laxmikanta Pradhan, Ashok Kumar Kumawat, Bharat Hegde , et al. · 2025

Real-time position control plays a crucial role in a successful plasma operation. For a shaped plasma, vertical instability, and hence its control, is mandatory for achieving the expected plasma parameters. In this work, real-time position…

Stabilization of sawtooth instability by short gas pulse injection in ADITYA-U tokamak Open

Suman Dolui, Kaushlender Singh, Bharat Hegde, Tanmay Macwan, SK Injamul Hoque , et al. · 2025

Experiments on ADITYA-U tokamak show a marked enhancement in the sawtooth period by application of short gas puffs of fuel that cause a modification of the radial density profile. A consequent suppression of the trapped electron modes then…

A multi-purpose reciprocating probe drive system for studying the effect of gas-puffs on edge plasma dynamics in the ADITYA-U tokamak Open

Kaushlender Singh, Bharat Hegde, Ashok K. Kumawat, Ankit Kumar, M. S. Khan , et al. · 2025

This article reports the development of a versatile high-speed reciprocating drive system (HRDS) with interchangeable probe heads to characterize the edge plasma region of the ADITYA-U tokamak. The system is driven by a servo motor, which …

A multi-purpose reciprocating probe drive system for studying the effect of gas-puffs on edge plasma dynamics in the ADITYA-U tokamak Open

Kaushlender Singh, Bharat Hegde, Ashok K. Kumawat, Ankit Kumar, M. S. Khan , et al. · 2025

This article reports the development of a versatile high-speed reciprocating drive system (HRDS) with interchangeable probe heads to characterize the edge plasma region of ADITYA-U tokamak. This reciprocating probe drive system consisting …

Stabilization of sawteeth instability by short gas pulse injection in ADITYA-U tokamak Open

Suman Dolui, Kaushlender Singh, Bharat Hegde, Tanmay Macwan, SK Injamul Hoque , et al. · 2025

Experiments on ADITYA-U tokamak show a marked enhancement in the sawtooth period by application of short gas puffs of fuel that cause a modification of the radial density profile. A consequent suppression of the trapped electron modes (TEM…

MHD activity induced coherent mode excitation in the edge plasma region of ADITYA-U tokamak Open

Kaushlender Singh, Suman Dolui, Bharat Hegde, Lavkesh Lachhvani, Sharvil Patel , et al. · 2024

In this paper, we report the excitation of coherent density and potential fluctuations induced by magnetohydrodynamic (MHD) activity in the edge plasma region of ADITYA-U tokamak. When the amplitude of the MHD mode, mainly the m/n = 2/1, i…

Plasma performance enhancement and impurity control using a novel technique of argon–hydrogen mixture fueled glow discharge wall conditioning in the ADITYA-U tokamak Open

K.A. Jadeja, Joydeep Ghosh, K. M. Patel, A.B. Patel, R.L. Tanna , et al. · 2024

Effective control of impurities and precise regulation of the fueling gas are supreme prerequisites for optimal operation in any fusion device. Conventional wall-conditioning methods fall short of achieving optimal wall conditioning. Conve…

The effect of impurity seeding on edge toroidal rotation in the ADITYA-U tokamak Open

Ankit Kumar, K. Shah, M.B. Chowdhuri, N. Ramaiya, Aman Gauttam , et al. · 2024

Intrinsic toroidal rotation velocity ( V φ ) has been measured from the Doppler shift of C 5+ carbon spectral lines (at 529.05 nm) in the edge region of the ADITYA-U tokamak without any auxiliary torque input in an ohmically heated pure hy…

Overview of physics results from the ADITYA-U tokamak and future experiments Open

R.L. Tanna, Joydeep Ghosh, K.A. Jadeja, Rohit Kumar, Suman Aich , et al. · 2024

The ADITYA upgrade (ADITYA-U), a medium-sized conventional tokamak facility in India, has been consistently producing experiments findings by using circular and shaped-plasmas. Recognizing the plasma parameters aligning…

Author Correction: Role of pinch in Argon impurity transport in ohmic discharges of Aditya-U Tokamak Open

K. Shah, Joydeep Ghosh, Sharvil Patel, M.B. Chowdhuri, K.A. Jadeja , et al. · 2023

Role of pinch in Argon impurity transport in ohmic discharges of Aditya-U Tokamak Open

K. Shah, Joydeep Ghosh, Sharvil Patel, M.B. Chowdhuri, K.A. Jadeja , et al. · 2023

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

R.L. Tanna, Sharvil Patel, Joydeep Ghosh, Chetna C. Chauhan, A. Amardas , et al. · 2023

To reduce the risk of severe damage to the vessel and inner peripherals of any tokamak and its safe operation, a robust technique for the mitigation of runaway electrons (REs) is required. The REs in ADITYA tokamak are effectively mitigate…

Role of pinch in Argon impurity transport in Ohmic discharges of Aditya-U Tokamak Open

Kajal Shah, Joydeep Ghosh, Sharvil Patel, M.B. Chowdhuri, K.A. Jadeja , et al. · 2023

We present experimental results of the trace argon impurity puffing in the Ohmic plasmas of Aditya-U tokamak performed to study the argon transport behaviour. Argon line emissions in visible and Vacuum Ultra Violet (VUV) spectral ranges ar…

Role of magnetohydrodynamic activity in sawtooth induced heat pulse propagation in ADITYA tokamak Open

Sharvil Patel, Joydeep Ghosh, M.B. Chowdhuri, K. B. K. Mayya, R. Manchanda , et al. · 2022

Fast propagation of sawtooth induced heat pulse is observed in the magnetohydrodynamic (MHD) active plasmas of ADITYA tokamak. The sawtooth crash deposits heat beyond the inversion radius, which gets transported to the edge region of the p…

Impurity Behavior in High Performance ADITYA Tokamak Plasmas Open

M.B. Chowdhuri, R. Manchanda, Joydeep Ghosh, Nandini Yadava, Sharvil Patel , et al. · 2022

Impurity behavior has been studied for the high performance Ohmically heated ADITYA tokamak plasmas operated with higher toroidal magnetic field and multiple gas puffs. The neutral hydrogen and impurity emissions in the visible range were …

Gas-puff induced cold pulse propagation in ADITYA-U tokamak Open

Tanmay Macwan, Harshita Raj, Kaushlender Singh, Suman Dolui, Sharvil Patel , et al. · 2021

Short bursts (similar to 1 ms) of gas, injecting similar to 10(17)-10(18) molecules of hydrogen and/or deuterium, lead to the observation of cold pulse propagation phenomenon in hydrogen plasmas of the ADITYA-U tokamak. After every injecti…

Evaluation of an Oxygen Transport Coefficient in the Aditya Tokamak Using the Radial Profile of O4+ Emissivity and the Importance of Atomic Data Used Therein Open

M.B. Chowdhuri, Joydeep Ghosh, R. Dey, Sharvil Patel, Nandini Yadava , et al. · 2019

Oxygen impurity transport in the typical discharges of the Aditya tokamak was investigated using emissivity radial profile of emissivity of the spectral line (2p3p 3D3–2p3d 3F4) at 650.024 nm from the Be-like oxygen ion. This O4+ spectral …

Sharvil Patel YOU? Author Swipe