排序方式: 共有6条查询结果,搜索用时 15 毫秒
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M.J. Singh M. Bandyopadhyay C. Rotti N.P. Singh Sejal Shah G. Bansal A. Gahlaut J. Soni H. Lakdawala Harshad Waghela I. Ahmed G. Roopesh U.K. Baruah A.K. Chakraborty 《Fusion Engineering and Design》2011,86(6-8):732-735
The diagnostic neutral beam (DNB) line shall be used to diagnose the He ash content in the D–T phase of the ITER machine using the charge exchange recombination spectroscopy (CXRS). Implementation of a successful DNB at ITER requires several challenges related to the production, neutralization and transport of the neutral beam over path lengths of 20.665 m, to be overcome. The delivery is aided if the above effects are tested prior to onsite commissioning. As DNB is a procurement package for INDIA, an ITER approved Indian test facility, INTF, is under construction at Institute for Plasma Research (IPR), India and is envisaged to be operational in 2015. The timeline for this facility is synchronized with the RADI, ELISE (IPP, Garching), SPIDER (RFX, Padova) in a manner that best utilization of configurational inputs available from them are incorporated in the design. This paper describes the facility in detail and discusses the experiments planned to optimise the beam transmission and testing of the beam line components using various diagnostics. 相似文献
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Bansal G Bhartiya S Pandya K Bandyopadhyay M Singh MJ Soni J Gahlaut A Parmar KG Chakraborty A 《The Review of scientific instruments》2012,83(2):02B118
Distribution of cesium in large negative ion beam sources to be operational in ITER, is presently based on the use of three or more cesium ovens, which operate simultaneously and are controlled remotely. However, use of multiple Cs ovens simultaneously is likely to pose difficulties in operation and maintenance of the ovens. An alternate method of Cs delivery, based on a single oven distribution system is proposed as one which could reduce the need of simultaneous operation of many ovens. A proof of principle experiment verifying the concept of a multinozzle distributor based Cs oven has been carried out at Institute for Plasma Research. It is also observed that the Cs flux is not controlled by Cs reservoir temperature after few hours of operation but by the temperature of the distributor which starts behaving as a Cs reservoir. 相似文献
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Gourab Bansal Agrajit Gahlaut Jignesh Soni Kaushal Pandya Kanu G. Parmar Ravi Pandey Mahesh Vuppugalla Bhavesh Prajapati Amee Patel Hiren Mistery Arun Chakraborty Mainak Bandyopadhyay Mahendrajit J. Singh Arindam Phukan Ratnakar K. Yadav Deepak Parmar 《Fusion Engineering and Design》2013,88(6-8):778-782
The RF based single driver ?ve ion source experiment test bed ROBIN (Replica Of BATMAN like source in INDIA) has been set up at Institute for Plasma Research (IPR), India in a technical collaboration with IPP, Garching, Germany. A hydrogen plasma of density 5 × 1012 cm?3 is expected in driver region of ROBIN by launching 100 kW RF power into the driver by 1 MHz RF generator. The cesiated source is expected to deliver a hydrogen negative ion beam of 10 A at 35 kV with a current density of 35 mA/cm2 as observed in BATMAN.In first phase operation of the ROBIN ion source, a hydrogen plasma has been successfully generated (without extraction system) by coupling 80 kW RF input power through a matching network with high power factor (cos θ > 0.8) and different plasma parameters have been measured using Langmuir probes and emission spectroscopy. The plasma density of 2.5 × 1011 cm?3 has been measured in the extraction region of ROBIN. For negative hydrogen ion beam extraction in second phase operation, extraction system has been assembled and installed with ion source on the vacuum vessel. The source shall be first operated in volume mode for negative ion beam extraction. The commissioning of the source with high voltage power supply has been initiated. 相似文献
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Bansal Khushboo Hooda Vikas Verma Neelam Kharewal Tannu Tehri Nimisha Dhull Vikas Gahlaut Anjum 《SILICON》2022,14(16):10173-10186
Silicon - Silicon (Si) is not considered as essential element for plant growth and development but it provides benefits to the plants in several ways. Due to distinguishing physiological features,... 相似文献
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A Novel Geometry Multi-Stage Depressed Collector for the Efficiency Enhancement of Space Traveling Wave Tubes 总被引:1,自引:0,他引:1
A. Mercy Latha Vishant Gahlaut Jaspreet Kaur Dheeraj Bharti V Srivastava R K Sharma S. K. Ghosh 《Journal of Infrared, Millimeter and Terahertz Waves》2013,34(1):53-61
A novel geometry of a multi-stage depressed collector with four stages has been designed for Ka-band space traveling wave tube. The inner structure of each electrode of the collector has been provided with a single-step corrugation of a positive slope followed by a negative slope. The performed simulation predicts that the proposed collector has 7 % more efficiency, less back streaming of electrons and lower weight as compared to the collector with conventional geometry. Additional features of this collector include inherent secondary electron trapping mechanism and better power handling capabilities. Above properties of the proposed collector makes it suitable for space applications. 相似文献
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K. N. Mehrotra A. S. Gahlaut Meera Sharma 《Journal of the American Oil Chemists' Society》1986,63(12):1571-1575
The critical micelle concentration (CMC), degree of dissociation and dissociation constant of lanthanum caprate in benzene-methanol
mixtures of varying composition were determined using conductometric measurements. The results show that the soap behaves
as a weak electrolyte in these solutions below the CMC. The value of the CMC (0.0027 M) was found to be independent of the
solvent composition but increases with the addition of dye. 相似文献
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