TECHNOLOGIES & APPLICATIONS

“TITAN”: AN ION SOURCE

Purpose

The Titan ion source depends for its operation on two forms of arc discharge with a common hollow anode initiated simultaneously or one after another.

A constricted discharge between cathode 1 and hollow anode 2 serves to generate gas ions and initiate a vacuum arc (with the discharge operating time being 20 ms). Metal ions are generated in the cathode spots of the vacuum arc initiated between electrode 2 and electrode 3. The ions are extracted from the plasma surface stabilized by fine-mesh metal grid 4. The ions are accelerated to a required energy by a dc accelerating voltage applied at the gap between hollow anode 2 and electrode 5. The latter consists of two grids made of metal wires and showing a high geometrical transparency. The accelerated ion beam is taken by a collector on which specimens or machine parts are placed. To cut off the secondary electrons knocked out from the collector by the ions, a negative potential of no less than 15 kV is applied to one of the grids of electrode 6. Insulator 7 is filled with transformer oil. The source is cooled with water circulating through a radiator.

Specifications
1.	Accelerating voltage	20-80 kV
2.	- Vacuum arc current - Constricted arc current	50-150 A 30-60 A
3.	- Metal ion beam current - Gas ion beam current	0.1-0.5 A 0.1-0.25 A
4.	Operating pulse repetition rates	12.5, 17, 25, 50 Hz
5.	Current pulse duration	400 ms
6.	Delay of vacuum arc initiation from constricted arc initiation	0-400 ms
7.	Ion beam cross-sectional area	250 cm²
8.	Vacuum arc operation time with-out changing the cathode	30 h
9.	Constricted arc operation time without changing the cathodes	100 h
10.	Source power supply voltage	3х380 V
11.	Excess pressure of compressed gas in the source	2-10 atm

The source is capable to produce ion beams of any gases (except oxygen) and metals.

For further information please contact:

Georgy Yu. Yushkov
Dr. Sci. (Engineering), Leading Researcher

Phone: (3822) 49-17-76
Fax: (3822) 49-24-10
E-mail: gyushkov@hcei.tsc.ru

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