IPAC2014 - List of Authors (Deng, Q.Y.)

Paper	Title	Page
THOAA01	Beam Trip Analysis by Bunch-by-bunch BPM System in BEPCⅡ	2779
SUSPSNE067	use link to see paper's listing under its alternate paper code
	Q.Y. Deng, J.S. Cao, J. Yue IHEP, Beijing, People's Republic of China
	A new bunch-by-bunch beam position measurement prototype system has been designed and built to monitor and analysis beam trip in the BEPCⅡ(Beijing Electron-Positron ColliderⅡ) machine. The fast ADC and programmable FPGA can obtain the beam information bunch-by-bunch, so we can analyze base on both time domain and frequency domain. In this paper we will presentation the system architecture and discuss some beam trip analysis result, such as beam instability, tune drifting, RF breakdown, and so on.
	Slides THOAA01 [0.999 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-THOAA01
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THPME137	Preliminary Study of Non-invasive Beam Profile Measurements for Proton Beams	3569
	H. He, J.S. Cao, Q.Y. Deng, J.H. Junhui, Y.F. Sui, J. Yue, Y. Zhao IHEP, Beijing, People's Republic of China J. Chen NSRRC, Hsinchu, Taiwan
	Funding: This work was supported by NSFC under grant NO.11305186 and No.11205172 Two non-invasive beam profile measurement methods were developed for China high intensity proton beams projects, including CSNS and ADS. The first consists in an IPM (ionization beam profile monitor) system which detect the ionized products from a collision of the beam particle with residual gas atoms or molecules present in the vacuum pipe. The second is an electron beam scanner which using a low energy electron beam instead of a metal wire to sweep through the beam. The deflection of electron beam by the collective field of the high intensity beam is measured. The charge density in the high intensity beam can be restored under certain conditions or estimated by various mathematical techniques. Here we present the design parameters of the IPM system, the signal intensity of ionization products, optimization of the electric field, machine designs of electrode, tracking of the ionization products and so on. The principle of the electron beam scanner and the test results which is based on a commercial electron gun from Kimball Physics are also introduced in details.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-THPME137
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

Paper

Title

Page

THOAA01

Beam Trip Analysis by Bunch-by-bunch BPM System in BEPCⅡ

2779

SUSPSNE067

use link to see paper's listing under its alternate paper code

Q.Y. Deng, J.S. Cao, J. Yue
IHEP, Beijing, People's Republic of China

A new bunch-by-bunch beam position measurement prototype system has been designed and built to monitor and analysis beam trip in the BEPCⅡ(Beijing Electron-Positron ColliderⅡ) machine. The fast ADC and programmable FPGA can obtain the beam information bunch-by-bunch, so we can analyze base on both time domain and frequency domain. In this paper we will presentation the system architecture and discuss some beam trip analysis result, such as beam instability, tune drifting, RF breakdown, and so on.

Slides THOAA01 [0.999 MB]

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-THOAA01

Export •

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

THPME137

Preliminary Study of Non-invasive Beam Profile Measurements for Proton Beams

3569

H. He, J.S. Cao, Q.Y. Deng, J.H. Junhui, Y.F. Sui, J. Yue, Y. Zhao
IHEP, Beijing, People's Republic of China
J. Chen
NSRRC, Hsinchu, Taiwan

Funding: This work was supported by NSFC under grant NO.11305186 and No.11205172
Two non-invasive beam profile measurement methods were developed for China high intensity proton beams projects, including CSNS and ADS. The first consists in an IPM (ionization beam profile monitor) system which detect the ionized products from a collision of the beam particle with residual gas atoms or molecules present in the vacuum pipe. The second is an electron beam scanner which using a low energy electron beam instead of a metal wire to sweep through the beam. The deflection of electron beam by the collective field of the high intensity beam is measured. The charge density in the high intensity beam can be restored under certain conditions or estimated by various mathematical techniques. Here we present the design parameters of the IPM system, the signal intensity of ionization products, optimization of the electric field, machine designs of electrode, tracking of the ionization products and so on. The principle of the electron beam scanner and the test results which is based on a commercial electron gun from Kimball Physics are also introduced in details.

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-THPME137

Export •

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