ECRIS2012 - List of Keywords (rfq)

Paper	Title	Other Keywords	Page
WEXO05	Effect of Source Tuning Parameters on the Plasma Potential of Heavy Ions and its Influence on the Longitudinal Optics of the High Current Injector	plasma, ion, electron, emittance	90
	G.O. Rodrigues, D. Kanjilal, P.S. Lakshmy, A. Mandal, Y. Mathur, A. Roy IUAC, New Delhi, India R. Baskaran IGCAR, Channai, India
	Plasma potentials for various heavy ions have been measured using the retarding field technique in the 18 GHz High Temperature Superconducting ECR ion source, PKDELIS. The influence of various source parameters viz., RF power, gas pressure, magnetic field, negative DC bias and gas mixing on the plasma potential is studied. It is observed that the plasma potentials are decreasing for increasing charge states and a mass effect is clearly observed for the ions with similar operating gas pressures. In the case of gas mixing, it is observed that the plasma potential minimises at an optimum value of the gas pressure of the mixing gas and the mean charge state maximises at this value. The energy spread arising from the plasma potential influences the longitudinal optics of the high current injector in terms of increased phase spread which deteriorates the transmission through the RFQ. Details of the measurements carried out as a function of various source parameters and its impact on the longitudinal optics are presented.
	Slides WEXO05 [11.394 MB]

FRXA01	High Intensity Beam Production at CEA/Saclay for the IFMIF Project	plasma, extraction, emittance, solenoid	182
	R. Gobin, G. Adroit, D. Bogard, N. Chauvin, O. Delferrière, Y. Gauthier, P. Girardot, F. Harrault, J.L. Jannin, D. Loiseau, P. Mattei, A. Roger, F. Senée, O. Tuske CEA/DSM/IRFU, France
	At CEA/Saclay, IRFU institute is in charge of the design, construction and characterization of the 140 mA continuous deuteron Injector for the IFMIF project. This injector includes the source and the low energy beam line (LEBT) with its own diagnostics. The Electron Cyclotron Resonance (ECR) ion source operates at 2.45 GHz and the 2 m long LEBT is based on 2 solenoids. Krypton gas injection in the beam line is foreseen in order to reach a high level of space charge compensation for the beam matching at the RFQ entrance. During the last months hydrogen beam has been produced in pulsed and continuous mode and the beam diagnostics have been installed and commissioned. Recently a 125 mA-100 keV pulsed deuteron beam has been produced with a 1% duty cycle. In this article, the high intensity proton and deuteron beam characterization will be presented.
	Slides FRXA01 [9.797 MB]

Paper

Title

Other Keywords

Page

Effect of Source Tuning Parameters on the Plasma Potential of Heavy Ions and its Influence on the Longitudinal Optics of the High Current Injector

plasma, ion, electron, emittance

90

G.O. Rodrigues, D. Kanjilal, P.S. Lakshmy, A. Mandal, Y. Mathur, A. Roy
IUAC, New Delhi, India
R. Baskaran
IGCAR, Channai, India

Plasma potentials for various heavy ions have been measured using the retarding field technique in the 18 GHz High Temperature Superconducting ECR ion source, PKDELIS. The influence of various source parameters viz., RF power, gas pressure, magnetic field, negative DC bias and gas mixing on the plasma potential is studied. It is observed that the plasma potentials are decreasing for increasing charge states and a mass effect is clearly observed for the ions with similar operating gas pressures. In the case of gas mixing, it is observed that the plasma potential minimises at an optimum value of the gas pressure of the mixing gas and the mean charge state maximises at this value. The energy spread arising from the plasma potential influences the longitudinal optics of the high current injector in terms of increased phase spread which deteriorates the transmission through the RFQ. Details of the measurements carried out as a function of various source parameters and its impact on the longitudinal optics are presented.

Slides WEXO05 [11.394 MB]

FRXA01

High Intensity Beam Production at CEA/Saclay for the IFMIF Project

plasma, extraction, emittance, solenoid

182

R. Gobin, G. Adroit, D. Bogard, N. Chauvin, O. Delferrière, Y. Gauthier, P. Girardot, F. Harrault, J.L. Jannin, D. Loiseau, P. Mattei, A. Roger, F. Senée, O. Tuske
CEA/DSM/IRFU, France

At CEA/Saclay, IRFU institute is in charge of the design, construction and characterization of the 140 mA continuous deuteron Injector for the IFMIF project. This injector includes the source and the low energy beam line (LEBT) with its own diagnostics. The Electron Cyclotron Resonance (ECR) ion source operates at 2.45 GHz and the 2 m long LEBT is based on 2 solenoids. Krypton gas injection in the beam line is foreseen in order to reach a high level of space charge compensation for the beam matching at the RFQ entrance. During the last months hydrogen beam has been produced in pulsed and continuous mode and the beam diagnostics have been installed and commissioned. Recently a 125 mA-100 keV pulsed deuteron beam has been produced with a 1% duty cycle. In this article, the high intensity proton and deuteron beam characterization will be presented.

Slides FRXA01 [9.797 MB]