Analysis of light emission from heating matter with intense RFQ ion beams

• Published in: Nuclear instruments & methods in physics research. Section A, Accelerators, spectrometers, detectors and associated equipment Vol. 415; no. 3; pp. 642 - 647
• Main Authors: Sasa, K, Ito, T, Hayashizaki, N, Yoshida, T, Hattori, T
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 01-10-1998
• Subjects: Beam–target interaction; Intense ion beam; Ion beam induced plasma; RFQ-linac; RFQ-linac; Intense ion beam; Ion beam induced plasma; Beam–target interaction
• ISSN: 0168-9002; 1872-9576
• DOI: 10.1016/S0168-9002(98)00439-2

An ion beam induced plasma was created by irradiating a cylindrical tube filled with a gas of 880
keV-
4
He
+
beam at the TIT RFQ-facility. The mean beam current in a macropulse is 2
mA. This beam can be focused onto a small spot area of about 1.1
mm
2 of a gas target, and a beam power density of 176
kW/cm
2 is achieved. The light emission from the heating gas is measured by a time-resolved optical and spectral diagnostic system in the wavelength range from 300 to 850
nm. The measured plasma temperature and density are compared with hydrodynamic simulations.