IPAC2016 - List of Authors (Nagatomo, T.)

Paper	Title	Page
MOPMR048	Emittance Measurements and Operation Optimization for ECR Ion Sources	361
	V. Tzoganis, C.P. Welsch The University of Liverpool, Liverpool, United Kingdom O. Kamigaito, T. Nagatomo, T. Nakagawa, V. Tzoganis RIKEN Nishina Center, Wako, Japan V. Tzoganis, C.P. Welsch Cockcroft Institute, Warrington, Cheshire, United Kingdom
	Funding: RIKEN IPA scheme and Cockcroft Institute Core Grant Electron Cyclotron Resonance (ECR) ion sources supply a broad range of ions for post acceleration in cyclotrons. Here, an effort to improve the beam transfer from RIKEN's 18 GHz ECR ion source to the Low Energy Beam Transfer (LEBT) line and an optimization of the performance of the ion source is presented. Simulation studies have shown that less than 20% of the beam is currently transferred. The first goal is to measure the transverse beam emittance in real time. The emittance monitor designed and fabricated for this purpose utilizes a pepper pot plate followed by a transparent scintillator and a CMOS camera for image capture. The second goal is to find the optimal operating point of the ion source by sweeping parameters such as RF power, vacuum pressure, extraction electrode position and voltage. To this extent, modifications of the ion source took place, as well as a measurement of the magnetic field inside the ion source. In this contribution the results of the emittance and other operating parameters measurements, as well as the design details of the emittance monitor are presented
DOI •	reference for this paper ※ DOI:10.18429/JACoW-IPAC2016-MOPMR048
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TUPMR022	Present Status and Future Plan of RIKEN RI Beam Factory	1281
	O. Kamigaito, T. Dantsuka, M. Fujimaki, N. Fukunishi, H. Hasebe, Y. Higurashi, E. Ikezawa, H. Imao, M. Kase, M. Kidera, M. Komiyama, K. Kumagai, T. Maie, T. Nagatomo, T. Nakagawa, M. Nakamura, J. Ohnishi, H. Okuno, K. Ozeki, N. Sakamoto, K. Suda, S. Watanabe, T. Watanabe, Y. Watanabe, K. Yamada, H. Yamasawa RIKEN Nishina Center, Wako, Japan
	Recent efforts concerning the accelerators of the RIKEN RI Beam Factory (RIBF) have been directed towards achieving higher heavy-ion beam intensities. As shown at the IPAC2014 conference, the intensities of these ion beams have improved significantly following the construction of the new injector, RILAC2, which is equipped with a 28-GHz superconducting ECR ion source, development of the helium gas stripper, and upgrading of the bending power of the fRC. In this respect, this paper presents the subsequent upgrade programs conducted in the past two years, such as the development of a new charge stripper for uranium beam and a new acceleration scheme of krypton beam. The current performance level of the RIBF accelerator complex, as well as a future plan to further increase the beam intensities, are also presented.
DOI •	reference for this paper ※ DOI:10.18429/JACoW-IPAC2016-TUPMR022
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Paper

Title

Page

Emittance Measurements and Operation Optimization for ECR Ion Sources

361

V. Tzoganis, C.P. Welsch
The University of Liverpool, Liverpool, United Kingdom
O. Kamigaito, T. Nagatomo, T. Nakagawa, V. Tzoganis
RIKEN Nishina Center, Wako, Japan
V. Tzoganis, C.P. Welsch
Cockcroft Institute, Warrington, Cheshire, United Kingdom

Funding: RIKEN IPA scheme and Cockcroft Institute Core Grant
Electron Cyclotron Resonance (ECR) ion sources supply a broad range of ions for post acceleration in cyclotrons. Here, an effort to improve the beam transfer from RIKEN's 18 GHz ECR ion source to the Low Energy Beam Transfer (LEBT) line and an optimization of the performance of the ion source is presented. Simulation studies have shown that less than 20% of the beam is currently transferred. The first goal is to measure the transverse beam emittance in real time. The emittance monitor designed and fabricated for this purpose utilizes a pepper pot plate followed by a transparent scintillator and a CMOS camera for image capture. The second goal is to find the optimal operating point of the ion source by sweeping parameters such as RF power, vacuum pressure, extraction electrode position and voltage. To this extent, modifications of the ion source took place, as well as a measurement of the magnetic field inside the ion source. In this contribution the results of the emittance and other operating parameters measurements, as well as the design details of the emittance monitor are presented

DOI •

reference for this paper ※ DOI:10.18429/JACoW-IPAC2016-MOPMR048

Export •

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

TUPMR022

Present Status and Future Plan of RIKEN RI Beam Factory

1281

O. Kamigaito, T. Dantsuka, M. Fujimaki, N. Fukunishi, H. Hasebe, Y. Higurashi, E. Ikezawa, H. Imao, M. Kase, M. Kidera, M. Komiyama, K. Kumagai, T. Maie, T. Nagatomo, T. Nakagawa, M. Nakamura, J. Ohnishi, H. Okuno, K. Ozeki, N. Sakamoto, K. Suda, S. Watanabe, T. Watanabe, Y. Watanabe, K. Yamada, H. Yamasawa
RIKEN Nishina Center, Wako, Japan

Recent efforts concerning the accelerators of the RIKEN RI Beam Factory (RIBF) have been directed towards achieving higher heavy-ion beam intensities. As shown at the IPAC2014 conference, the intensities of these ion beams have improved significantly following the construction of the new injector, RILAC2, which is equipped with a 28-GHz superconducting ECR ion source, development of the helium gas stripper, and upgrading of the bending power of the fRC. In this respect, this paper presents the subsequent upgrade programs conducted in the past two years, such as the development of a new charge stripper for uranium beam and a new acceleration scheme of krypton beam. The current performance level of the RIBF accelerator complex, as well as a future plan to further increase the beam intensities, are also presented.

DOI •

reference for this paper ※ DOI:10.18429/JACoW-IPAC2016-TUPMR022

Export •

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