IBIC2016 - List of Authors (Mulyani, E.)

Paper	Title	Page
MOAL03	Beam Commissioning of SuperKEKB Rings at Phase 1	6
	M. Tobiyama, M. Arinaga, J.W. Flanagan, H. Fukuma, H. Ikeda, H. Ishii, K. Mori, E. Mulyani, M. Tejima KEK, Ibaraki, Japan G. Bonvicini Wayne State University, Detroit, Michigan, USA E. Mulyani Sokendai, Ibaraki, Japan G.S. Varner University of Hawaii, Honolulu,, USA
	The Phase 1 commissioning of SuperKEKB rings with-out superconducting final focus magnets or Belle-II de-tector began in Feb., 2016. A total of 10¹⁰ mA (LER) and 870 mA (HER) stored beam has been achieved close to the design emittance and x-y coupling. Most of the beam diagnostics, including new systems such as gated turn-by-turn monitors and X-ray beam size monitors, have been commissioned with beam and proved to be essential to the success of machine commissioning. The results of the beam commissioning, including the evaluation and diffi-culties of the beam diagnostics are shown.
	Slides MOAL03 [9.607 MB]
DOI •	reference for this paper ※ DOI:10.18429/JACoW-IBIC2016-MOAL03
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TUPG72	Calibration of X-ray Monitor during the Phase I of SuperKEKB commissioning	524
	E. Mulyani Sokendai, Ibaraki, Japan J.W. Flanagan KEK, Ibaraki, Japan
	X-ray monitors (XRM) have been installed in each SuperKEKB ring, the Low Energy Ring (LER) and High Energy Ring (HER), primarily for vertical beam size measurement. Both rings have been commissioned in Phase I of SuperKEKB operation (February-June 2016), and several XRM calibration studies have been carried out. The geometrical scale factors seems to be well understood for both LER and HER. The emittance knob ratio method yielded results consistent with expectations based on the machine model optics (vertical emittance ε_y is {§I{≈8}{pm}}). For the HER, the vertical emittance ε_y is {§I{≈41}{pm}}, which is 4× greater than the optics model expectation. Analysis of beam size and lifetime measurements suggests unexpectedly large point response functions, particularly in the HER.
	Poster TUPG72 [34.615 MB]
DOI •	reference for this paper ※ DOI:10.18429/JACoW-IBIC2016-TUPG72
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

Paper

Title

Page

Beam Commissioning of SuperKEKB Rings at Phase 1

6

M. Tobiyama, M. Arinaga, J.W. Flanagan, H. Fukuma, H. Ikeda, H. Ishii, K. Mori, E. Mulyani, M. Tejima
KEK, Ibaraki, Japan
G. Bonvicini
Wayne State University, Detroit, Michigan, USA
E. Mulyani
Sokendai, Ibaraki, Japan
G.S. Varner
University of Hawaii, Honolulu,, USA

The Phase 1 commissioning of SuperKEKB rings with-out superconducting final focus magnets or Belle-II de-tector began in Feb., 2016. A total of 10¹⁰ mA (LER) and 870 mA (HER) stored beam has been achieved close to the design emittance and x-y coupling. Most of the beam diagnostics, including new systems such as gated turn-by-turn monitors and X-ray beam size monitors, have been commissioned with beam and proved to be essential to the success of machine commissioning. The results of the beam commissioning, including the evaluation and diffi-culties of the beam diagnostics are shown.

Slides MOAL03 [9.607 MB]

DOI •

reference for this paper ※ DOI:10.18429/JACoW-IBIC2016-MOAL03

Export •

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

TUPG72

Calibration of X-ray Monitor during the Phase I of SuperKEKB commissioning

524

E. Mulyani
Sokendai, Ibaraki, Japan
J.W. Flanagan
KEK, Ibaraki, Japan

X-ray monitors (XRM) have been installed in each SuperKEKB ring, the Low Energy Ring (LER) and High Energy Ring (HER), primarily for vertical beam size measurement. Both rings have been commissioned in Phase I of SuperKEKB operation (February-June 2016), and several XRM calibration studies have been carried out. The geometrical scale factors seems to be well understood for both LER and HER. The emittance knob ratio method yielded results consistent with expectations based on the machine model optics (vertical emittance ε_y is {§I{≈8}{pm}}). For the HER, the vertical emittance ε_y is {§I{≈41}{pm}}, which is 4× greater than the optics model expectation. Analysis of beam size and lifetime measurements suggests unexpectedly large point response functions, particularly in the HER.

Poster TUPG72 [34.615 MB]

DOI •

reference for this paper ※ DOI:10.18429/JACoW-IBIC2016-TUPG72

Export •

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