A5101418616- Particle accelerators and beam dynamics
- Superconducting Materials and Applications
- Particle Accelerators and Free-Electron Lasers
- Magnetic confinement fusion research
- Plasma Diagnostics and Applications
- Ion-surface interactions and analysis
- Gyrotron and Vacuum Electronics Research
- Spacecraft and Cryogenic Technologies
- Nuclear Physics and Applications
- Integrated Circuits and Semiconductor Failure Analysis
- Physics of Superconductivity and Magnetism
- Pulsed Power Technology Applications
- Bone Tissue Engineering Materials
- Metal and Thin Film Mechanics
- Fusion materials and technologies
- Calcium Carbonate Crystallization and Inhibition
- Advanced Data Storage Technologies
- Magnetic Field Sensors Techniques
- Atomic and Subatomic Physics Research
- International Science and Diplomacy
- Nanopore and Nanochannel Transport Studies
- Diamond and Carbon-based Materials Research
- Radiation Effects and Dosimetry
- Microwave Engineering and Waveguides
- Bone health and osteoporosis research
National Institute Of Technology Silchar
2024
Indian Institute of Technology Kharagpur
2023-2024
Inter-University Accelerator Centre
2005-2015
University of Illinois Urbana-Champaign
1985
A superconducting linear accelerator based on niobium quarter wave resonators has recently become operational to boost the energy of heavy ion beams available from existing 15 UD (unit doubled) Pelletron accelerator. The typically performed at an accelerating field $3--6\text{ }\text{ }\mathrm{MV}/\mathrm{m}$ 6 watts input power in test cryostat. When they were tested linac cryostat, fields drastically reduced and a number other problems also encountered. At present, all have been diagnosed...
Using different models for the deposition of energy on lattice and a classical molecular dynamics approach to subsequent transport, we evaluate how details model influence sputtering yield from Lennard-Jones target irradiated with MeV/u ion beam. Two are considered: uniform, instantaneous into cylinder fixed radius around projectile track, used in earlier fluid simulations yields; an distributed time space based formalism developed thermal spike model. The dependence total deposited atoms is...
High temperature superconducting (HTS) electron cyclotron resonance ion source called PKDELIS was designed, developed as a collaborative project mainly between Inter University Accelerator Centre (formerly Nuclear Science Centre) and Pantechnik. One of the major criteria design to get high performance suitable for cryogen-free operation on voltage platform with minimum requirements electrical power cooling water. Ion beams having A∕q ∼7 are required from this current injector linear...
Despite the growing interest in apatites, available experimental studies on their properties are limited scope. Researchers, therefore, increasingly resorting to predictions using density functional theory (DFT). However, large deviations can be seen between DFT-based estimates and results, presumably due approximations made DFT models. We undertake a comprehensive benchmarking exercise involving sixteen exchange-correlation (XC) functionals (including dispersion corrections), five...
The design and implementation of a purely electrostatic deceleration lens used to obtain beams highly charged ions at very low energies is presented. the such that it can be with parallel as well diverging incoming delivers focused energy beam target. In addition, tuning final over wide range (1 eV/q several hundred eV/q, where q charge state) possible without any change in hardware configuration. was tested Ar8+, extracted from an electron cyclotron resonance ion source, having initial 30...
From the ECR plasma, hot electrons leak across magnetic lines of force and by striking plasma chamber produce bremsstrahlung x-rays. The wall gives information on confinement status electron. In our studies, experimental measurements are carried out in NANOGAN electron cyclotron resonance (ECR) ion source for x-rays results presented. While optimizing a particular charge state source, parameters adjusted to get maximum current. components studied these cases understanding conditions.
Studies on the effect of frequency tuning bremsstrahlung spectra, beam intensities, and shape various ions have been carried out in 10 GHz NANOGAN ECR ion source. The warm cold components electrons were found to be directly correlated with intensity enhancement case Ar(9+) but not so for O(5+). electron component was, however, much smaller compared component. fine spectrum, intensities is presented.
For the high current injector project at Inter University Accelerator Centre, a temperature superconducting electron cyclotron resonance (ECR) ion source, PKDELIS, would provide charge state ions. The emittance of ECR source is an important parameter to design further beam transport system and match acceptances downstream radio frequency quadrupole drift tube linac accelerators injector. analyzed PKDELIS has been measured utilizing three size technique. A slit two profile monitors positioned...
The control of superconducting resonators requires a large amount rf power due to their narrow bandwidth and the presence microphonics in ambience, although only small part is dissipated inside resonator generate accelerating field. A simple innovative method has been devised reduce effect on quarter-wave resonators. Experiments have conducted successfully at room temperature 4.2 K demonstrate new damping mechanism. detailed report experiments with test cryostat an on-line linac presented this paper.
Plasma potentials for various heavy ions have been measured using the retarding field technique in 18 GHz high temperature superconducting ECR ion source, PKDELIS [C. Bieth, S. Kantas, P. Sortais, D. Kanjilal, G. Rodrigues, Milward, Harrison, and R. McMahon, Nucl. Instrum. Methods B 235, 498 (2005)10.1016/j.nimb.2005.03.232; Kumar, A. Mandal, Roy, C. Rev. Sci. 77, 03A317 (2006)10.1063/1.2164887]. The beam extracted from source is decelerated close to location of a mesh which polarized...
X-ray bremsstrahlung measurements from the 18 GHz High Temperature Superconducting Electron Cyclotron Resonance Ion Source, Pantechnik-Delhi Source were measured as a function of negative dc bias voltage, keeping all other source operating parameters fixed and extraction voltage in off condition. The optimization medium highly charged ions argon with similar is described. It observed that high temperature component electron altered significantly help population has to be maximized for...
Hydroxyapatite (HAP) is a naturally occurring calcium phosphate mineral that resembles human hard tissue in structure and composition. Its unique makes it suitable for variety of applications such as biomedical implants, pollution control, nuclear waste management. The hexagonal HAP endows with five independent elastic constants, comprehensive understanding their role properties essential large scale adoption various applications. However, the limited experimental computational estimates...
The ion current achievable from high intensity ECR sources for highly charged ions is limited by the space charge. This makes classical extraction systems transport and subsequent matching to a radio frequency quadrupole (RFQ) accelerator less efficient. direct plasma injection (DPI) method developed originally laser source avoids these problems uses combined focusing of gap between RFQ vanes (or rods) rf fields penetrating into this gap. For performance that use superconducting solenoids,...
A room temperature high-energy sweeper had been designed, fabricated, and installed at the postacceleration section of Tandem accelerator. The sweeper, a part new pulsing system, is being used to inject bunched beam without dark current into linear accelerator acting as booster Tandem. resonance frequency was set 6.0625MHz quality factor ∼1300 achieved. During off-line testing deflector voltage ∼30kV measured for an input power 300W. pair indigenously fabricated capacitors fine-tuning...