Research and Development Activities
Basic theory and simulation group (BTS)
IPR BTS group is an integral and important part of Institute for Plasma Research, Gandhinagar. Since its established. The Group is dedicated to Theoretical and computational studies in plasma physics. This page provides a glimpse of research activities being carried out in our group and introduces people involved in research/technical activities.
Microwave Plasma Division
It is well established that e.m wave propagation is not supported by an unmagnetized, over-dense plasma. However, depending on the intensity of the incoming wave, several interesting linear and nonlinear interactions occur between the wave and plasma at the critical layer (ω=ωp), leading to the absorption of the wave.
Nonneutral Plasma Division
Conventional plasma, by definition, is a quasi-neutral collection of mutually interacting electrons and ions having a collective effect. In contrast, there is an exotic world of plasmas, which are ‘nonneutral’ having only one species. Such plasmas are therefore an exception to the definition. Pure electron plasmas are perhaps the most popular, although ion plasmas, positron plasmas and anti-proton plasmas are also possible. They all have certain peculiarities significantly different from their neutral cousins but are called plasmas because they too, like their neutral counterparts, exhibit rich collective phenomena. For more information on the underlying basic physics, one can have a look at the web pages, say, nonneutral plasma group at Physics Department, University of California, San Diego, U.S.A.
Multi-Cusp Plasma Device
Basic aim: To confine contact ionized (tungsten surface) cesium ions in a multi-line cusp magnetic field and do its characterization.
Expected Result : A 'text book' like ideal plasma, with Te~Ti, really quiescent, with only 'natural' fluctuations.
Read more >>
Pulse Power and Dev. of RFQ for Accelerators
ADITYA is the first indigenously designed and built tokamak of the country. It was commissioned in 1989. ADITYA, a medium size Tokamak, is being operated for over a decade. It has a major radius of 0.75m and minor radius of the plasma is 0.25 m. A maximum of 1.2 T toroidal magnetic field is generated with the help of 20 toroidal field coils spaced symmetrically in the toroidal direction.The major subsystems and parameters of the machine have been described elsewhere.ADITYA is regularly being operated with the transformer-converter power system.~100 msec 80 - 100 kA plasma discharges at toroidal field of 8.0 kG are being regularly studied. During this period experiments on edge plasma fluctuations, turbulence and other related works have been conducted. Standard diagnostics have been employed during these measurements. Figure below gives a view of ADITYA with the auxiliary heating systems attached to it.
Infrared Thermography is the science of acquisition and analysis of thermal information by using non contact thermal imaging devices. Visible photograph depicts spatial distribution of light or colour intensity similarly “thermo-graph” depicts spatial distribution of temperature values.
The main objective of the group is to develop effective spectroscopy based diagnostics for the ADITYA and the SST-1 tokamaks and experimental plasmas in general. Also, to acquire data during the operation of the machines and infer the behavior of the plasmas there from.
This group works as a diagnostics tool for Tokamak plasmas from detecting x-emission from plasmas.
X-ray radiation emits from Tokamak plasma in the different energy ranges e.g soft x-ray emission (100ev-10kev),hard x-ray emission (100kev and above).
Fusion Product Diagnostics
Micro Wave & ECE Diagnostics
IR Thermography, Charge Exchange & Motional Stark Effect
Facilitation Centre for Industrial Plasma Technologies (FCIPT)
Facilitation Centre for Industrial Plasma Technologies (FCIPT) is a division under Institute for Plasma Research (IPR) which mainly focuses on technology development for social benefits and industries. FCIPT develops plasma based technologies and commercialises through Technology Transfer to industrial partners. Some of the Social beneficial technologies developed by FCIPT are as below.
Reducing erosion & corrosion of metals
Environment friendly waste disposal technology
Making wool more cohesive
Surface activation of Carbon Granule
For complete details visit www.plasmaindia.com
Laser interferometer gravitational wave observatory (LIGO) is a detector to understand origin of the gravitational waves (LIGO-G1702087-v1). Gravitational waves are radiation which travel at the speed of light and are transparent to any matter and set into motion any matter they interact with. LIGO is a modified version of the Michelson interferometer which incorporates a pair of suspended Fabry-Perot cavity. The orthogonal arms of LIGO are 4-km each and are installed for studying astrophysical events which radiate energy in the form of gravitational waves. Some of the astrophysical events which emits strong gravitational wave radiations that can be detected by earth-based detectors are coalescing of binary black holes (B.P. Abbott et. al., PRL, 116, 241103), neutron stars (B. P. Abbott et. al. PRL, 119, 161101), exploding supernovas (arXiv:1709.00955v2) and spinning neutron stars (K. Riles, arXiv:1209.0667v3). Although the gravitational waves emitted at the source are strong, by the time these radiations travelling at the speed of light reaches earth, their amplitude decays by r-1 (where r is the distance of earth from the source that emits gravitational waves) and cannot be measured using normal measuring techniques.
The detector achieves its capability by using sophisticated engineering techniques which attenuates noise in high frequency range and tunes the detector to lower frequency region. All the optical components are suspended using multiple stage vibration isolation (F. Maticrad et. al., CQG 32, 185003) such that the ambient noises are cancelled. The measurement being extremely small, all the optical components are housed and the experiment is carried out in ultra high vacuum.
- Fundamental Plasma research activities
- Fusion Devices(Aditya & SST1)
- Plasma Diagnostics
- Fusion related Technologies
- Plamsa Technologies for Societal benefits
- LIGO India IPR Activities