A CW duopigatron multiply-charged ion source

Conference · Thu Apr 01 04:00:00 EST 1976 · IEEE Trans. Nucl. Sci., v. NS-23, no. 2, pp. 1084-1087

OSTI ID:4033031

Lejeune, C; Grandchamp, J P; Gilles, J P; Aubert, J

A systematic study of the duopigatron has shown that this type of source is very convenient for the production of intense dc ion beams (greater than 10mA) of heavy elements with moderate charge states, if the operation and design parameters are properly matched. The charge state density distribution compares with the best results reported for dc duoplasmatrons, whereas the discharge power is less or equal. For argon, with a 0.8 kW power, the percentage of particles in the beam is: A$sup +$ equals 38, A$sup 2+$ equals 50.4, A$sup 3+$ equals 11, A$sup 4+$ = 0.5, A$sup 5+$ approximately equal to 0.1; the overall gas utilization factor being 80 percent if an insulating material (BN) is used for the anticathode and expansion cup construction. The total beam intensity is determined by the diameter of the hole bored on the axis of the anticathode electrode, and the ion current density in this plane is comparable to that at the anode plane of a duoplasmatron (approximately equal to 2 A/cm$sup 2$). The normalized emittance of the beam is E/sub N/ = 4 x 10$sup -7$ m x rd for a total beam intensity of 7.8 mA, which corresponds to an emissive hole of 0.8 mm diameter and a brightness of B/sub N/ approximately equal to 10$sup 10$ A$sup -2$/ sub xm/ xrd$sup -2$.

• Research Organization: Paris Univ., Orsay, France
• NSA Number: NSA-33-030461
• OSTI ID: 4033031
• Conference Information: Journal Name: IEEE Trans. Nucl. Sci., v. NS-23, no. 2, pp. 1084-1087
• Country of Publication: United States
• Language: English

Related Subjects

*ACCELERATORS-- ION SOURCES
*ION SOURCES-- PERFORMANCE TESTING
430301* --Particle Accelerators--Auxiliaries & Components-- Ion Sources
ARGON
BEAM EMITTANCE
CARRIER DENSITY
CURRENT DENSITY
DUOPLASMATRONS
HEAVY IONS
N54300* --Particle Accelerators--Ion Sources
Injection & Extraction
PENNING ION SOURCES