2011 Particle Accelerator Conference - List of Keywords (ECR)

Paper	Title	Other Keywords	Page
MOP007	The Development Status of Compact Linear Accelerator in Korea	plasma, ECRIS, neutron, ion	112
	B.S. Lee, M. Won Korea Basic Science Institute, Busan, Republic of Korea J.-K. Ahn Pusan National University, Pusan, Republic of Korea T. Nakagawa RIKEN Nishina Center, Wako, Japan
	Funding: This work was supported by KBSI D30300 to M.S Won The establishment of a compact linear accelerator is in progress by Korea Basic Science Institute. The main capability of this facility is the production of multiply ionized metal clusters and the generation of intense beams of highly charged ions for material, medical and nuclear physical research. To generate the intense beam of highly charged ions, we will develop an Electron Cyclotron Resonance Ion Source (ECRIS) using 28GHz microwaves. For this ECRIS, the designing of a superconducting magnet, microwave inlet, beam extraction, and plasma chamber were in progress. A superconducting magnet system have also being developed. In this presentation, I report the current status of our compact linear accelerator development and future plan.

WEP257	Spectroscopic Estimation of Plasma Parameters for ECR Ion Source in the Intense 14-MeV Neutron Generator being developed at IPR	plasma, electron, ion, ion-source	1963
	S. Banerjee, M. Abhangi, T.K. Basu, J. Ghosh, S.C. Jakhar, N. Ramaiya, C.V.S. Rao, S.J. Vala Institute for Plasma Research, Bhat, Gandhinagar, India P. Mehta Pandit Deendayal Petroleum University, Gandhinagar, India
	An accelerator based 14-MeV neutron generator, for fusion neutronics studies is being developed at IPR. ECR ion source is used to generate deuterium plasma. Electron density and temperature in the ECR plasma are measured using non-intrusive spectroscopic methods. Langmuir probes, though conventionally used for estimating local parameters in low-pressure microwave plasmas, are difficult to implement here owing to space constraint and heating of the probe from interaction with standing microwaves. Pure helium (He), He seeded hydrogen and deuterium plasmas are studied. Spectra for entire visible range are recorded for different fill pressures for a constant microwave power and different powers for a constant fill pressure. For optically thin plasmas of low density, line intensity ratio method can be used with appreciable reliability. CR model is used from ADAS (atomic data and analysis structure) to predict plasma parameters from suitable line ratios. sbanerje@ipr.res.in sudhir@ipr.res.in Institute for Plasma Research

WEP271	Development of a Permanent-Magnet Microwave Ion Source for a Sealed-Tube Neutron Generator	ion, ion-source, neutron, plasma	1984
	O. Waldmann, B.A. Ludewigt LBNL, Berkeley, California, USA
	Funding: Supported by the U.S. Department of Energy under Contract No. DE-AC02-05CH11231. A microwave ion source has been designed and constructed for use with a sealed-tube, high-yield neutron generator. When operated with a tritium-deuterium gas mixture the generator will be capable of producing 5 · 10¹¹ n/s in non-proliferation applications. Microwave ion sources are well suited for such a device because they can produce high extracted beam currents with a high atomic fraction at low gas pressures of 0.2 − 0.3 Pa required for sealed tube operation. The magnetic field strength for achieving electron cyclotron resonance (ECR) condition, 87.5 mT at 2.45 GHz microwave frequency, was generated and shaped with permanent magnets surrounding the plasma chamber and a ferromagnetic plasma electrode. This approach resulted in a compact ion source that matches the neutron generator requirements. The needed proton-equivalent extracted beam current density of 40 mA/cm² was obtained at moderate microwave power levels of ∼ 400W. Results on magnetic field design, pressure dependency and atomic fraction measured for different wall materials are presented.

Paper

Title

Other Keywords

Page

MOP007

The Development Status of Compact Linear Accelerator in Korea

plasma, ECRIS, neutron, ion

112

B.S. Lee, M. Won
Korea Basic Science Institute, Busan, Republic of Korea
J.-K. Ahn
Pusan National University, Pusan, Republic of Korea
T. Nakagawa
RIKEN Nishina Center, Wako, Japan

Funding: This work was supported by KBSI D30300 to M.S Won
The establishment of a compact linear accelerator is in progress by Korea Basic Science Institute. The main capability of this facility is the production of multiply ionized metal clusters and the generation of intense beams of highly charged ions for material, medical and nuclear physical research. To generate the intense beam of highly charged ions, we will develop an Electron Cyclotron Resonance Ion Source (ECRIS) using 28GHz microwaves. For this ECRIS, the designing of a superconducting magnet, microwave inlet, beam extraction, and plasma chamber were in progress. A superconducting magnet system have also being developed. In this presentation, I report the current status of our compact linear accelerator development and future plan.

WEP257

Spectroscopic Estimation of Plasma Parameters for ECR Ion Source in the Intense 14-MeV Neutron Generator being developed at IPR

plasma, electron, ion, ion-source

1963

S. Banerjee, M. Abhangi, T.K. Basu, J. Ghosh, S.C. Jakhar, N. Ramaiya, C.V.S. Rao, S.J. Vala
Institute for Plasma Research, Bhat, Gandhinagar, India
P. Mehta
Pandit Deendayal Petroleum University, Gandhinagar, India

An accelerator based 14-MeV neutron generator, for fusion neutronics studies is being developed at IPR. ECR ion source is used to generate deuterium plasma. Electron density and temperature in the ECR plasma are measured using non-intrusive spectroscopic methods. Langmuir probes, though conventionally used for estimating local parameters in low-pressure microwave plasmas, are difficult to implement here owing to space constraint and heating of the probe from interaction with standing microwaves. Pure helium (He), He seeded hydrogen and deuterium plasmas are studied. Spectra for entire visible range are recorded for different fill pressures for a constant microwave power and different powers for a constant fill pressure. For optically thin plasmas of low density, line intensity ratio method can be used with appreciable reliability. CR model is used from ADAS (atomic data and analysis structure) to predict plasma parameters from suitable line ratios.
sbanerje@ipr.res.in
sudhir@ipr.res.in
Institute for Plasma Research

WEP271

Development of a Permanent-Magnet Microwave Ion Source for a Sealed-Tube Neutron Generator

ion, ion-source, neutron, plasma

1984

O. Waldmann, B.A. Ludewigt
LBNL, Berkeley, California, USA

Funding: Supported by the U.S. Department of Energy under Contract No. DE-AC02-05CH11231.
A microwave ion source has been designed and constructed for use with a sealed-tube, high-yield neutron generator. When operated with a tritium-deuterium gas mixture the generator will be capable of producing 5 · 10¹¹ n/s in non-proliferation applications. Microwave ion sources are well suited for such a device because they can produce high extracted beam currents with a high atomic fraction at low gas pressures of 0.2 − 0.3 Pa required for sealed tube operation. The magnetic field strength for achieving electron cyclotron resonance (ECR) condition, 87.5 mT at 2.45 GHz microwave frequency, was generated and shaped with permanent magnets surrounding the plasma chamber and a ferromagnetic plasma electrode. This approach resulted in a compact ion source that matches the neutron generator requirements. The needed proton-equivalent extracted beam current density of 40 mA/cm² was obtained at moderate microwave power levels of ∼ 400W. Results on magnetic field design, pressure dependency and atomic fraction measured for different wall materials are presented.