ECRIS2020 - Table of Session: MOXZO (Monday Before Second Break)

Paper	Title	Page
MOXZO01	Status of the 45 GHz MARS-D ECRIS	17
	D.Z. Xie, J.Y. Benitez, M.K. Covo, A. Hodgkinson, M. Juchno, L. Phair, D.S. Todd, L. Wang LBNL, Berkeley, California, USA
	Funding: This work was supported in part by the U.S. Department of Energy, Office of Science, Office of Nuclear Physics under contract number DE-AC02-05CH11231 Development of the MARS-D ECR ion source, a 45 GHz next generation ECRIS using a NbTi MARS-magnet, has been continuously moving forward at LBNL. Recent stress analyses and other key components of the MARS-D ion source have been essentially finalized. This article presents and discusses the status of this new 45 GHz ECR ion source, such as the latest design features and the fabrication plan with funding available in the very near future.
	Slides MOXZO01 [3.661 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-ECRIS2020-MOXZO01
About •	Received ※ 25 September 2020 — Revised ※ 02 October 2020 — Accepted ※ 01 December 2020 — Issue date ※ 29 November 2021
Cite •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

MOXZO02	Conceptual Design of Heavy Ion ToF-ERDA Facility Based on Permanent Magnet ECRIS and Variable Frequency RFQ Accelerator	21
	O.A. Tarvainen, D.C. Faircloth, A.P. Letchford STFC/RAL/ISIS, Chilton, Didcot, Oxon, United Kingdom J. Julin, T. Kalvas JYFL, Jyväskylä, Finland
	Ion beam analysis is typically based on tandem accelerators and negative ions. The required 5-20 MeV energies for heavy ion time-of-flight elastic recoil detection analysis* (ToF-ERDA) can be achieved with a high charge state ion source and RFQ accelerator. We present a conceptual design of a ToF-ERDA facility based on a permanent magnet ECRIS and variable frequency RFQ accelerating 1-10 pnA of 40Ar⁸⁺, 84Kr¹⁷⁺ and 129Xe²⁴⁺ ions to 4-7, 10^-15 and 13-20 MeV. We present the PM ECRIS requirements focusing on the CUBE-ECRIS** with a quadrupole min-B field topology. Beam dynamics studies demonstrating good transmission of the heavy ion beams from the ion source to the RFQ entrance through the electrostatic low energy beam transport (LEBT) and a permanent magnet dipole are presented. The predicted LEBT transmissions of the CUBE-ECRIS (rectangular extraction slit) and a conventional ECRIS (circular extraction aperture) are compared. The conceptual design of the RFQ is described and the implications of the energy spread on the high energy beam transport are discussed. It is demonstrated that an energy spread below 0.2 % is necessary for appropriate resolution of the heavy ion ToF-ERDA. * J. Julin and T. Sajavaara, Nucl. Instrum. Methods Phys. Res. B 406, Part A, (2017), pp 61-65. ** T. Kalvas, O. Tarvainen, V. Toivanen and H. Koivisto, 2020 JINST 15 P06016.
	Slides MOXZO02 [10.204 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-ECRIS2020-MOXZO02
About •	Received ※ 25 September 2020 — Revised ※ 28 September 2020 — Accepted ※ 14 December 2020 — Issue date ※ 18 May 2021
Cite •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

MOXZO03	FRIB 28 GHz ECR Ion Source Development and Status
	H.T. Ren, N.K. Bultman, G. Machicoane, P. Morrison, W.R. O’Brien, M. Omelayenko, X. Rao FRIB, East Lansing, Michigan, USA H. Felice, R.R. Hafalia, P. Pan, S. Prestemon LBNL, Berkeley, California, USA
	Funding: This work is supported by the U.S. Department of Energy Office of Science under Cooperative Agreement DE-SC0000661 To satisfy ultimate performance requirements for heavy ions, a 28 GHz superconducting ECR ion source is under development at the Facility for Rare Isotope Beams (FRIB) in collaboration with Berkeley National Laboratory. The construction and testing of the superconducting magnet was completed at Berkeley and delivered to FRIB in January 2018. The magnet and cryostat have been assembled on the high voltage platform. Magnet cooldown and field mapping are planned by the end of 2020. The source commissioning shall start in early 2021. Details of the ion source design, current status of assembly, and commissioning plan will be presented in this paper.
	Slides MOXZO03 [4.235 MB]
Cite •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

Paper

Title

Page

Status of the 45 GHz MARS-D ECRIS

17

D.Z. Xie, J.Y. Benitez, M.K. Covo, A. Hodgkinson, M. Juchno, L. Phair, D.S. Todd, L. Wang
LBNL, Berkeley, California, USA

Funding: This work was supported in part by the U.S. Department of Energy, Office of Science, Office of Nuclear Physics under contract number DE-AC02-05CH11231
Development of the MARS-D ECR ion source, a 45 GHz next generation ECRIS using a NbTi MARS-magnet, has been continuously moving forward at LBNL. Recent stress analyses and other key components of the MARS-D ion source have been essentially finalized. This article presents and discusses the status of this new 45 GHz ECR ion source, such as the latest design features and the fabrication plan with funding available in the very near future.

Slides MOXZO01 [3.661 MB]

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-ECRIS2020-MOXZO01

About •

Received ※ 25 September 2020 — Revised ※ 02 October 2020 — Accepted ※ 01 December 2020 — Issue date ※ 29 November 2021

Cite •

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

MOXZO02

Conceptual Design of Heavy Ion ToF-ERDA Facility Based on Permanent Magnet ECRIS and Variable Frequency RFQ Accelerator

21

O.A. Tarvainen, D.C. Faircloth, A.P. Letchford
STFC/RAL/ISIS, Chilton, Didcot, Oxon, United Kingdom
J. Julin, T. Kalvas
JYFL, Jyväskylä, Finland

Ion beam analysis is typically based on tandem accelerators and negative ions. The required 5-20 MeV energies for heavy ion time-of-flight elastic recoil detection analysis* (ToF-ERDA) can be achieved with a high charge state ion source and RFQ accelerator. We present a conceptual design of a ToF-ERDA facility based on a permanent magnet ECRIS and variable frequency RFQ accelerating 1-10 pnA of 40Ar⁸⁺, 84Kr¹⁷⁺ and 129Xe²⁴⁺ ions to 4-7, 10^-15 and 13-20 MeV. We present the PM ECRIS requirements focusing on the CUBE-ECRIS** with a quadrupole min-B field topology. Beam dynamics studies demonstrating good transmission of the heavy ion beams from the ion source to the RFQ entrance through the electrostatic low energy beam transport (LEBT) and a permanent magnet dipole are presented. The predicted LEBT transmissions of the CUBE-ECRIS (rectangular extraction slit) and a conventional ECRIS (circular extraction aperture) are compared. The conceptual design of the RFQ is described and the implications of the energy spread on the high energy beam transport are discussed. It is demonstrated that an energy spread below 0.2 % is necessary for appropriate resolution of the heavy ion ToF-ERDA.
* J. Julin and T. Sajavaara, Nucl. Instrum. Methods Phys. Res. B 406, Part A, (2017), pp 61-65.
** T. Kalvas, O. Tarvainen, V. Toivanen and H. Koivisto, 2020 JINST 15 P06016.

Slides MOXZO02 [10.204 MB]

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-ECRIS2020-MOXZO02

About •

Received ※ 25 September 2020 — Revised ※ 28 September 2020 — Accepted ※ 14 December 2020 — Issue date ※ 18 May 2021

Cite •

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

MOXZO03

FRIB 28 GHz ECR Ion Source Development and Status

H.T. Ren, N.K. Bultman, G. Machicoane, P. Morrison, W.R. O’Brien, M. Omelayenko, X. Rao
FRIB, East Lansing, Michigan, USA
H. Felice, R.R. Hafalia, P. Pan, S. Prestemon
LBNL, Berkeley, California, USA

Funding: This work is supported by the U.S. Department of Energy Office of Science under Cooperative Agreement DE-SC0000661
To satisfy ultimate performance requirements for heavy ions, a 28 GHz superconducting ECR ion source is under development at the Facility for Rare Isotope Beams (FRIB) in collaboration with Berkeley National Laboratory. The construction and testing of the superconducting magnet was completed at Berkeley and delivered to FRIB in January 2018. The magnet and cryostat have been assembled on the high voltage platform. Magnet cooldown and field mapping are planned by the end of 2020. The source commissioning shall start in early 2021. Details of the ion source design, current status of assembly, and commissioning plan will be presented in this paper.

Slides MOXZO03 [4.235 MB]

Cite •

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