Results 51 to 60 of about 196 (116)

Characteristics of negative ion generation in large area negative ion source based on cavity ring-down spectroscopy

He jishu
BackgroundThe neutral beam injection system (NBI) has the highest heating efficiency and the clearest physical mechanism, so it has become one of the main auxiliary heating methods used in the world's large magnetic confinement controlled thermonuclear ...
ZHU Tengsai, LIANG Lizhen, XIE Yahong, CAO Zhengkun, PENG Xufeng, HU Chundong   +5 more
doaj   +1 more source

Experimental investigation of plasma instabilities by Fourier analysis in an electron cyclotron resonance ion source

Physical Review Accelerators and Beams, 2018
The plasma instabilities play an important role in an electron cyclotron resonance (ECR) ion source for the production of intense heavy ion beams in high charge states for particle accelerators.
Sarvesh Kumar, Jyotsna Sharma, Prashant Sharma, Shatendra Sharma, Yaduvansh Mathur, Devendra Sharma, Manish K. Kashyap   +6 more
doaj   +1 more source

Production of multiply charged ions from RF ion source

Fizika : a journal of experimental and theoretical physics, 1989
A design of the RF ion source is made to develop its capability for production of multiply charged ions by the use of magnetic mirror, mechanical constriction at the plasma tube center and electron beam-plasma interaction. An emphasis is given to study the plasma characteristics i. e.
Abdelaziz, Mohamed E., Zakhary, Safwat G., Abdelghaffar, Amin M.   +2 more
openaire   +1 more source

Study on the Machining Characteristics and Thermal Effects of RF Ion Beam Processing of KDP Crystals

Crystals
To address the issues of heat accumulation and potential thermal damage during radio-frequency (RF) ion beam machining of KDP crystals, an energy deposition model and a temperature field model were developed based on Sigmund’s sputtering theory, a ...
Hailin Guo, Dasen Wang, Shiyan Zhao, Chaoxiang Xia, Ning Pei   +4 more
doaj   +1 more source

Development of the RF Ion Sources for Focused Ion Beam Accelerators

Журнал нано- та електронної фізики, 2013
The paper presents the results of investigations of ion sources developed in the IAP of NAS of Ukraine for generation of high brightness ion beams with small energy spread. A series of RF ion sources operated at the frequency of 27.12 MHz were studied: the inductive RF ion source, the helicon ion source, the multi-cusp RF ion source, and the sputter ...
Voznyi, V., Miroshnichenko, V., Mordyk, S., Shulha, D., Storizhko, V., Tokman, V.   +5 more
openaire   +2 more sources

Assessment of plasma uniformity in the extraction region of an RF-driven negative ion source for CRAFT NNBI

Nuclear Fusion
The uniformity of beam, for large RF negative ion source, is closely related to the plasma uniformity in the extraction region. The six electrostatic probes were installed above the plasma grid (PG) 5 mm to evaluate the plasma uniformity.
Xufeng Peng, Yongjian Xu, Yufan Li, Jianglong Wei, Guangyong Mei, Bo Liu, YuWen Yang, Na Wang, Junwei Xie, Yahong Xie, Lizhen Liang, Bin Wu   +11 more
doaj   +1 more source

100 seconds and megawatt negative ion beam accelerations at the CRAFT NNBI test facility

Nuclear Fusion
A promising negative-ion-based neutral beam injection (NNBI) system should achieve high energy, high power and long pulse simultaneously for the plasma heating and current drive in the large-scale fusion devices. A NNBI test facility has been constructed
Jianglong Wei, Yuwen Yang, Wei Liu, Yongjian Xu, Yuchen Qu, Yuming Gu, Yahong Xie, Chundong Hu, Lizhen Liang   +8 more
doaj   +1 more source

Neutral beams at ROBIN with electrostatic ion separator

Nuclear Fusion
The RF Operated Beam source in India for Negative ions (ROBIN), a single-driver RF-based negative hydrogen ion (H ^- ) source test bed located at the Institute for Plasma Research, Gandhinagar, has been upgraded to enable neutral beam operations. It is a
K. Pandya, M.J. Singh, M. Bhuyan, M. Vuppugalla, R.K. Yadav, A. Gahlaut, H. Mistri, B. Prajapat, R. Pandey, S. Dash, M. Bandyopadhyay, J. Bhagora, V. Prajapati, H. Tyagi, A. Chakraborty   +14 more
doaj   +1 more source

Precise micromotion compensation of a tilted ion chain

Frontiers in Quantum Science and Technology
Excess micromotion can be a substantial source of errors in trapped-ion based quantum processors and clocks due to the sensitivity of the internal states of the ion to external fields and motion.
Craig W. Hogle, Ashlyn D. Burch, Jonathan D. Sterk, Matthew N. H. Chow, Megan Ivory, Daniel S. Lobser, Peter Maunz, Jay Van Der Wall, Christopher G. Yale, Susan M. Clark, Daniel Stick, Melissa C. Revelle   +11 more
doaj   +1 more source

Single event upset and mitigation technique in JLTFET based RF mixer

Results in Engineering
This work deals with the study of single event effect (SEE) on RF mixer along with the mitigation technique. A 20 nm independent gate Junctionless Tunnel FET JLTFET (IGJLTFET) was first designed and based on its Id-Vg characteristics; RF mixer circuit ...
Aishwarya K, Lakshmi B
doaj   +1 more source