High-Power Ion Beam Characteristics of a Magnetic Multi-Pole Line-Cusp Ion Source for the HL-2A Tokomak

2009 ◽  
Vol 26 (8) ◽  
pp. 082901 ◽  
Author(s):  
Zou Gui-Qing ◽  
Lei Guang-Jiu ◽  
Jiang Shao-Feng ◽  
Cao Jian-Yong ◽  
Yu Li-Ming ◽  
...  
Keyword(s):  
High Power ◽  
Ion Beam ◽  
Ion Source ◽  
Beam Characteristics

Plasma and Ion Beam Characteristics of the Dynamag Ion Source

1962 ◽  
Vol 33 (12) ◽  
pp. 1338-1339 ◽  
Author(s):  
Edwin M. Kellogg ◽  
Karl E. Eklund
Keyword(s):  
Ion Beam ◽  
Ion Source ◽  
Beam Characteristics

Ion Beam Characteristics of Liquid Metal (Gallium) Ion Source with Inclusion of Suppressor

2015 ◽  
Vol 7 (12) ◽  
pp. 945-949
Author(s):  
Boo Ki Min ◽  
Ju Sung Kim ◽  
Seung Ju Lim ◽  
Hyun OH Joo ◽  
Sang Jung Ahn ◽  
...  
Keyword(s):  
Liquid Metal ◽  
Ion Beam ◽  
Ion Source ◽  
Beam Characteristics

Investigation of conical anode – disc cathode ion source

2018 ◽  
Vol 96 (2) ◽  
pp. 194-201
Author(s):  
S. Abdel Samed ◽  
S.I. Radwan ◽  
H. El-Khabeary
Keyword(s):  
Discharge Current ◽  
Theoretical Calculations ◽  
Ion Beam ◽  
Beam Current ◽  
Ion Source ◽  
Experimental Results ◽  
Maximum Output ◽  
Nitrogen Gas ◽  
Beam Characteristics ◽  
Good Agreement

An axial direct-current conical anode – disc cathode ion source has been designed, constructed, and operated. The electrical discharge and the output ion beam characteristics are measured using nitrogen gas. It is found that at the optimum dimensions, pressure equal to 4.5 × 10−5 mm Hg and discharge current equal to 250 μA, a maximum output ion beam current equal to 91 μA can be obtained. A comparison between the experimental results and theoretical calculations of the output ion beam current values at the optimum dimensions and operating parameters for different discharge current of conical anode and disc cathode ion source using nitrogen gas is determined. It is found that a good agreement exists between the experimental results and theoretical calculations.

Development of high-current ionic liquid ion source toward surface modification

2013 ◽  
Vol 1575 ◽  
Author(s):  
Mitsuaki Takeuchi ◽  
Takuya Hamaguchi ◽  
Hiromichi Ryuto ◽  
Gikan H Takaoka
Keyword(s):  
Ionic Liquid ◽  
Surface Modification ◽  
Flow Rate ◽  
Ion Beam ◽  
Beam Current ◽  
Ion Source ◽  
Ion Sources ◽  
Ion Current ◽  
High Current ◽  
Beam Characteristics

ABSTRACTIonic liquid (IL) ion sources with different emitter tip materials and tip numbers were developed and examined on ion beam characteristics with respect to its ILs wettability. As a result of ion current measurements, the most stable emission current was obtained for the graphite emitter tip and the ion current increased with increase of the tip number. The results indicate that the emitter wettability corresponding to the supplying flow rate and the number of emission site play an important role to stabilize and increase the beam current.

scholarly journals Status of the Terawatt Accumulator Accelerator project

2002 ◽  
Vol 20 (3) ◽  
pp. 385-391 ◽  
Author(s):  
N.N. ALEXEEV ◽  
P.N. ALEKSEEV ◽  
V.N. BALANUTSA ◽  
S.L. BEREZNITSKY ◽  
V.N. EVTICHOVICH ◽  
...  
Keyword(s):  
High Power ◽  
Ion Beam ◽  
Ion Source ◽  
Laser Ion Source ◽  
Carbon Ions ◽  
Booster Synchrotron ◽  
The Uk ◽  
The Way

The construction of the Terawatt Accumulator (TWAC) facility is nearly completed at the ITEP in Moscow. All the major milestones have been successfully passed with a beam of carbon ions, except for the final result (the high power beam accumulation), which is on the way. The beam of C4+ ions delivered by the laser ion source is accelerated up to the energy of 300 MeV/amu by two steps—in the linear injector I3 and in the booster synchrotron UK. The accelerated beam is extracted from the UK ring and transferred to the U10 accumulator ring. Non-Liouvillian stripping technique (C4+ ⇒ C6+) is applied for stacking of C6+ batches into the accumulator ring U10. First experiments with extracted beam of ions have started in 2002. Status of the TWAC components, current results of activities aiming at mastering the ion beam stacking technique, and outlook for the TWAC advance are presented.

The R&D Activities and Future Plan of 4MW Hot Cathode Ion Source for EAST Neutral Beam Injector

2017 ◽  
Author(s):  
Yahong Xie ◽  
Chundong Hu ◽  
Sheng Liu ◽  
Jun Li ◽  
Yuanlai Xie ◽  
...  
Keyword(s):  
High Power ◽  
Beam Energy ◽  
Ion Beam ◽  
Ion Source ◽  
Neutral Beam ◽  
Beam Power ◽  
Test Bed ◽  
Steady State Operation ◽  
Long Pulse ◽  
Positive Ion

The Experimental Advanced Superconducting Tokamak (EAST) is one of the fully superconducting tokamak, its aim at the long-pulse operation (1000s) to study the physics of steady-state operation for nuclear fusion sciences. In order to support the steady-state operation and physical research, the high power neutral beam injection (NBI) system need to be employed on the EAST for the plasma heating and current driving. According to the scientific study schedule of the EAST, the designed NBI system includes two beam lines which will be constructed in two phases. Each beam line will deliver a deuterium neutral beam with beam energy of 50–80 keV with beam duration of 10–100 s. Each beam line has the maximum beam power of 4MW. The high current ion source is one of the most important parts in the high power NBI. A hot cathode positive ion based source was developed for EAST-NBI, which shown in Fig. 1. The ion source contains a bucket hot cathode arc chamber with 650 mm long, 260 mm width and 300 mm depth. There are 32 hairpin filaments with diamond of 1.5 mm and 160 mm long to supply primary electrons. A tetrode type accelerator with slit type used to extract the ions from the plasma and accelerated to the desired energy. The beam extraction area is 120 mm × 480 mm (can be changed) with beam transmittance of 60 %. The designed beam species is deuterium with beam power of 2–4 MW and beam energy of 50–80 keV and beam pulse length of 10–100 s. The ion source needs to be conditioning before operation on the EAST-NBI. An ion source test bed was designed and developed for the ion source performance tests and the optimization verification. The characteristics of ion source were tested with hydrogen beam, and each ion source should achieve 4MW ion beam with beam energy of 80 keV. The optimum beam perveance and arc efficiency were analyzed too. The optimum beam perveance was 2.8 μp with beam energy of 50 keV and the arc efficiency was 0.55A/kw. Long pulse operation was one of the requests of EAST ion source. The real-time feedback control method was employed and can got stable plasma and ion beam. The beam extraction was tested to achieve 100 s on the test bed. Consider the high power deposited on the calorimeter, the beam was modulated with suitable frequency and duty ratio. When the conditioning finished, the ion sources were moved to the EAST-NBI. The deuterium beam was extracted and injected into the EAST plasma. Details of the performance of positive ion source on the test bed and EAST-NBI will be presented.

Nucleation and Early Growth of Sputtered thin Films

1970 ◽  
Vol 28 ◽  
pp. 516-517
Author(s):  
Dudley M. Sherman ◽  
Thos. E. Hutchinson
Keyword(s):  
Thin Films ◽  
Electron Beam ◽  
Ion Beam ◽  
Ion Source ◽  
Water Cooling ◽  
Stages Of Growth ◽  
Lens Assembly ◽  
Microscope Technique ◽  
Ion Beam Sputter Deposition

The in situ electron microscope technique has been shown to be a powerful method for investigating the nucleation and growth of thin films formed by vacuum vapor deposition. The nucleation and early stages of growth of metal deposits formed by ion beam sputter-deposition are now being studied by the in situ technique.A duoplasmatron ion source and lens assembly has been attached to one side of the universal chamber of an RCA EMU-4 microscope and a sputtering target inserted into the chamber from the opposite side. The material to be deposited, in disc form, is bonded to the end of an electrically isolated copper rod that has provisions for target water cooling. The ion beam is normal to the microscope electron beam and the target is placed adjacent to the electron beam above the specimen hot stage, as shown in Figure 1.

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