ECRIS2020 - List of Authors (May, D.P.)

Paper	Title	Page
WEZZO05	Studies of ECR Plasma Chamber Contamination With Accelerated Beams and Diamond Detectors
	B.T. Roeder, J.E. Ärje, D.P. May, S.J. Yennello Texas A&M University Cyclotron Institute, College Station, Texas, USA F.P. Abegglen, G.J. Kim, G. Tabacaru Texas A&M University, Cyclotron Institute, College Station, Texas, USA
	While developing stable and re-accelerated rare isotope beams (RIB) for acceleration with the TAMU K500 cyclotron, a background of various stable beams has been observed. It has been determined that this background is arising from alloys and contamination in the components of our ECR ion sources, in particular, the aluminum alloy plasma chamber. We have developed a detector system based on diamond detector telescopes that allows us to measure the composition of the beam after acceleration with the K500 cyclotron at TAMU. Using this technique, we have been able to develop ion source and cyclotron tuning methods to minimize the stable beam background and maximize the stable beams of interest and/or the RIBs. We also endeavor to reduce the stable beam background from the ECR ion sources using techniques such as pure aluminum liners. In my presentation, I plan to show our accelerated beam detection setup with diamond detectors. I also plan to present about the background we have measured with this setup from the ECRIS components, in particular, the plasma chamber. Finally, I will comment on our efforts to reduce this background.
	Slides WEZZO05 [1.166 MB]
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WEZZO10	Electron Cyclotron Emission Imaging of Electron Cyclotron Resonance Ion Source Plasmas	164
	L.E. Henderson, H.L. Clark, C.A. Gagliardi Texas A&M University, Cyclotron Institute, College Station, Texas, USA D.P. May Texas A&M University Cyclotron Institute, College Station, Texas, USA
	A new imaging system for Electron Cyclotron Resonance Ion Sources (ECRIS) has been designed and is being built. This K- and Ka-band camera will extract localized measurements of absolute energy and relative number density for ECRIS plasma electrons by imaging their Electron Cyclotron Emission (ECE) spectra, as the frequency, shape, and strength of the ECE harmonics correlate directly with the local magnetic field, electron energy, and plasma density. The design of the overall quasi-optical system will be presented, including novel ceramic optics for the radial viewports of the Cyclotron Institute’s ECRIS and metamaterial mirrors with electronically controllable reflectivity. Spatial resolution sufficient to distinguish important plasma regions and temporal resolution sufficient to study dynamic plasma processes is expected.
	Slides WEZZO10 [10.583 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-ECRIS2020-WEZZO10
About •	Received ※ 28 September 2020 — Revised ※ 07 October 2020 — Accepted ※ 15 October 2020 — Issue date ※ 16 November 2020
Cite •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

Paper

Title

Page

WEZZO05

Studies of ECR Plasma Chamber Contamination With Accelerated Beams and Diamond Detectors

B.T. Roeder, J.E. Ärje, D.P. May, S.J. Yennello
Texas A&M University Cyclotron Institute, College Station, Texas, USA
F.P. Abegglen, G.J. Kim, G. Tabacaru
Texas A&M University, Cyclotron Institute, College Station, Texas, USA

While developing stable and re-accelerated rare isotope beams (RIB) for acceleration with the TAMU K500 cyclotron, a background of various stable beams has been observed. It has been determined that this background is arising from alloys and contamination in the components of our ECR ion sources, in particular, the aluminum alloy plasma chamber. We have developed a detector system based on diamond detector telescopes that allows us to measure the composition of the beam after acceleration with the K500 cyclotron at TAMU. Using this technique, we have been able to develop ion source and cyclotron tuning methods to minimize the stable beam background and maximize the stable beams of interest and/or the RIBs. We also endeavor to reduce the stable beam background from the ECR ion sources using techniques such as pure aluminum liners. In my presentation, I plan to show our accelerated beam detection setup with diamond detectors. I also plan to present about the background we have measured with this setup from the ECRIS components, in particular, the plasma chamber. Finally, I will comment on our efforts to reduce this background.

Slides WEZZO05 [1.166 MB]

Cite •

reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

WEZZO10

Electron Cyclotron Emission Imaging of Electron Cyclotron Resonance Ion Source Plasmas

164

L.E. Henderson, H.L. Clark, C.A. Gagliardi
Texas A&M University, Cyclotron Institute, College Station, Texas, USA
D.P. May
Texas A&M University Cyclotron Institute, College Station, Texas, USA

A new imaging system for Electron Cyclotron Resonance Ion Sources (ECRIS) has been designed and is being built. This K- and Ka-band camera will extract localized measurements of absolute energy and relative number density for ECRIS plasma electrons by imaging their Electron Cyclotron Emission (ECE) spectra, as the frequency, shape, and strength of the ECE harmonics correlate directly with the local magnetic field, electron energy, and plasma density. The design of the overall quasi-optical system will be presented, including novel ceramic optics for the radial viewports of the Cyclotron Institute’s ECRIS and metamaterial mirrors with electronically controllable reflectivity. Spatial resolution sufficient to distinguish important plasma regions and temporal resolution sufficient to study dynamic plasma processes is expected.

Slides WEZZO10 [10.583 MB]

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-ECRIS2020-WEZZO10

About •

Received ※ 28 September 2020 — Revised ※ 07 October 2020 — Accepted ※ 15 October 2020 — Issue date ※ 16 November 2020

Cite •

reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)