http://nopr.niscpr.res.in/handle/123456789/61385 Tue, 06 Oct 2026 19:15:31 GMT 2026-10-06T19:15:31Z http://nopr.niscpr.res.in/handle/123456789/63124 Title: Simulation and Characterization of Optical Cavity for Iodine Stabilized Helium Neon Laser Authors: Anju; Moona, Girija; Jewariya, Mukesh; Arora, Poonam; Sharma, Rina Abstract: Laser cavity design and characterization plays a crucial role in spectroscopy and development of wavelength standards. Frequency stability of laser is significantly affected by perturbations in environment effects on mirror mounts and fabrication quality of guide ways & mounts. While designing the laser resonator for iodine stabilized helium-neon (He-Ne) laser, linear mechanism of mirror mount is required to vary the cavity length, in order to scan the frequency for spectroscopy. In this investigation, we have designed a shaft consist of straight splines that will be used for the holding and linear movement of the mirror. This manuscript present the design of cavity for a He-Ne laser intended for intracavity spectroscopy of iodine, as well as simulation in octave software for stability analysis, and discussed the dimensional characterization of invar guide ways and spline shaft. Roundness of invar rods used area was measured using form tester (RA- 2200 CNC) and a coordinate measuring machine (3D-CMM, LEGEX 9106) was used for dimensional characterization of spline shaft, and the associated uncertainty of measurement was evaluated as per ISO GUM/LPU approach according to JCGM 100:2008. Page(s): 967-975 Fri, 01 Dec 2023 00:00:00 GMT http://nopr.niscpr.res.in/handle/123456789/63124 2023-12-01T00:00:00Z http://nopr.niscpr.res.in/handle/123456789/63123 Title: Assessment of Radiological Risks and Chemical Toxicity due to Exposure of Uranium in Water Samples of District Mahendergarh Haryana, India Authors: Chahal, Kavita; Kumar, Suneel; Budhwar, Savita; Dalal, Ranjeet; Panghal, Amanjeet; Kataria, Navish Abstract: In this study, we focused on assessing the concentration of uranium in drinking water samples from 50 locations in the Mahendergarh district of Haryana state, India, using a LED Fluorimeter Quantalase (LF-2a). Uranium, a radioactive element, can pose risks to human healthif ingested excessively over long periods. Our observations revealed significant variation in uranium concentration in water samples, with a mean value of 10.8±1 μg l-1. However, it is worth noting that this value fallswithin the recommended safe limit for drinking water. Additionally, we conducted calculations to estimate the annual uranium ingestion dose, which ranged from 0.11 μSv y-1 to 43.8 μSv y-1. The maximum annual ingestion dose is calculated for the adult male group. The lifetime average daily dose of uranium was also calculated, value was found to vary from 0.01 μg kg-1 day-1 to 0.81 μg kg-1 day-1, with an average value of 0.31 μg kg-1 day-1. We also identified a weak positive correlation between groundwater depthand uranium concentration. Page(s): 976-983 Fri, 01 Dec 2023 00:00:00 GMT http://nopr.niscpr.res.in/handle/123456789/63123 2023-12-01T00:00:00Z http://nopr.niscpr.res.in/handle/123456789/63122 Title: Low Temperature Loss Measurement of Aluminium Thin Film Transmission Lines Authors: Singh, Pooja; Patel, Sandhya M; Siwach, P K Abstract: In this article, we study the planar microwave structures made from Aluminium thin films deposited by the sputtering technique at low temperature. The loss mechanisms in these Aluminium transmission lines deposited on Silicon substrates have been analysed by considering the stopping distance in the conducting lines. It is shown that the attenuation of the lines depends on the material properties and edge shape of the transmission lines. The two-port microwave transmission measurement of the structures was performed with a vector network analyser in the 1-12 GHz frequency range using a cryostat system. This work presents that Aluminium can be a potential candidate for various applications, namely MKIDS, and can replace other conventional superconductors for low temperature applications. Additionally, stopping distance analysis in silicon substrate-based microstrip lines can be continued in order to analyse the precise losses due to the step edge fabrication of the transmission lines. This analysis can then be used to estimate the uncertainty in the loss measurement. This work will be beneficial for developing the transmission lines for a variety of cutting-edge technologies, including quantum computing, the Internet of Things, and high-speed communication systems, where loss parameters play a crucial role. Page(s): 984-990 Fri, 01 Dec 2023 00:00:00 GMT http://nopr.niscpr.res.in/handle/123456789/63122 2023-12-01T00:00:00Z http://nopr.niscpr.res.in/handle/123456789/63121 Title: The Study of Radon/Thoron and Progeny Concentration in the District Muzaffarnagar, Uttar Pradesh, India Using SSNTDs Authors: Kumar, Rajnish; Kumar, Sandeep; Kumar, Pankaj; Rawat, R B S; Vats, Kapil Abstract: The study aimed to measure indoor concentrations of radon, thoron, and their progeny in populated areas across seven locations in Muzaffarnagar using dosimeters, DTPS, and DRPS. The data collected over one year across four quarters revealed significant variability in concentration between locations and seasons. The highest average concentration of radon was found in Charthawal from November to January (92.3 Bq/m³), while the highest average concentration of thoron was observed in Mansoorpur from August to October (84.9 Bq/m³). The average concentration of radon progeny was highest in Rohana from November to January (24.7 Bq/m³), while the average concentration of thoron progeny was highest in Tirupadi from August to October (2.9 Bq/m³). Significant variations were observed in the concentration of radon, thoron, and their progeny between locations, which can be due to geological differences, building materials, and ventilation rates. The data also revealed seasonal variation, with November to January having the highest average concentrations of radon, thoron, and their progeny. The total effective dose of radon + EERC varied considerably across locations, with Tirupadi having the highest total effective dose of 0.89 mSv/year, and Muzaffarnagar having the lowest total effective dose of 0.62 mSv/year and similarly for thoron + EETC having the highest of 0.42 mSv/ year. the lowest of 0.07 mSv/ year in Rohana. Page(s): 991-997 Fri, 01 Dec 2023 00:00:00 GMT http://nopr.niscpr.res.in/handle/123456789/63121 2023-12-01T00:00:00Z