IBIC2016 - List of Authors (Zhang, H.D.)

Paper	Title	Page
TUPG73	Preparatory Work for a Fluorescence Based Profile Monitor for an Electron Lens	528
	S. Udrea, P. Forck GSI, Darmstadt, Germany E. Barrios Diaz, O.R. Jones, P. Magagnin, G. Schneider, R. Veness CERN, Geneva, Switzerland P. Forck, S. Udrea IAP, Frankfurt am Main, Germany V. Tzoganis, C.P. Welsch, H.D. Zhang Cockcroft Institute, Warrington, Cheshire, United Kingdom
	Electron lenses (e-lens) have been proposed and used to mitigate several issues related to beam dynamics in high current synchrotrons. A hollow electron lens system is presently under development as part of the collimation upgrade for the high luminosity up-grade of LHC. Moreover, at GSI an electron lens system also is proposed for space charge compensation in the SIS-18 synchrotron to decrease the tune spread and allow for the high intensities at the future FAIR facility. For effective operation, a very precise alignment is necessary between the ion beam and the low energy electron beam. For the e-lens at CERN a beam diagnostics setup based on an intersecting gas sheet and the observation of beam induced fluorescence (BIF) is under development within a collaboration between CERN, Cockcroft Institute and GSI. In this paper we give an account of recent preparatory experiments performed at the Cockcroft Institute's gas curtain experimental setup with the aim to find the optimum way of distinguishing between the signals due to the low energy electron beam and the relativistic proton beam.
DOI •	reference for this paper ※ DOI:10.18429/JACoW-IBIC2016-TUPG73
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

WEPG71	3D Density Scans of a Supersonic Gas Jet for Beam Profile Monitoring	815
	H.D. Zhang, V. Tzoganis, C.P. Welsch, W. Widmann Cockcroft Institute, Warrington, Cheshire, United Kingdom V. Tzoganis, C.P. Welsch, W. Widmann, H.D. Zhang The University of Liverpool, Liverpool, United Kingdom
	Funding: STFC Cockcroft and EU under GA 215080. A beam profile monitor based on a supersonic gas jet was successfully tested at the Cockcroft Institute. This monitor can be used for a large variety of beams over a large energy range, including high intensity/high energy beams with large destructive power which make the use of many commonly used diagnostics impossible, and beams with a short life time which require minimum interference of the diagnostics. The achievable resolution of this type of monitor depends on the jet thickness and homogeneity. Detailed knowledge of the jet density profile is hence of high importance. In this contribution we present how a moveable vacuum gauge was successfully used to investigate the 3D density distribution of the jet. We compare the experimental data to results from simulations and discuss how the findings can help further improve of the overall jet design.
DOI •	reference for this paper ※ DOI:10.18429/JACoW-IBIC2016-WEPG71
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

Paper

Title

Page

Preparatory Work for a Fluorescence Based Profile Monitor for an Electron Lens

528

S. Udrea, P. Forck
GSI, Darmstadt, Germany
E. Barrios Diaz, O.R. Jones, P. Magagnin, G. Schneider, R. Veness
CERN, Geneva, Switzerland
P. Forck, S. Udrea
IAP, Frankfurt am Main, Germany
V. Tzoganis, C.P. Welsch, H.D. Zhang
Cockcroft Institute, Warrington, Cheshire, United Kingdom

Electron lenses (e-lens) have been proposed and used to mitigate several issues related to beam dynamics in high current synchrotrons. A hollow electron lens system is presently under development as part of the collimation upgrade for the high luminosity up-grade of LHC. Moreover, at GSI an electron lens system also is proposed for space charge compensation in the SIS-18 synchrotron to decrease the tune spread and allow for the high intensities at the future FAIR facility. For effective operation, a very precise alignment is necessary between the ion beam and the low energy electron beam. For the e-lens at CERN a beam diagnostics setup based on an intersecting gas sheet and the observation of beam induced fluorescence (BIF) is under development within a collaboration between CERN, Cockcroft Institute and GSI. In this paper we give an account of recent preparatory experiments performed at the Cockcroft Institute's gas curtain experimental setup with the aim to find the optimum way of distinguishing between the signals due to the low energy electron beam and the relativistic proton beam.

DOI •

reference for this paper ※ DOI:10.18429/JACoW-IBIC2016-TUPG73

Export •

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

WEPG71

3D Density Scans of a Supersonic Gas Jet for Beam Profile Monitoring

815

H.D. Zhang, V. Tzoganis, C.P. Welsch, W. Widmann
Cockcroft Institute, Warrington, Cheshire, United Kingdom
V. Tzoganis, C.P. Welsch, W. Widmann, H.D. Zhang
The University of Liverpool, Liverpool, United Kingdom

Funding: STFC Cockcroft and EU under GA 215080.
A beam profile monitor based on a supersonic gas jet was successfully tested at the Cockcroft Institute. This monitor can be used for a large variety of beams over a large energy range, including high intensity/high energy beams with large destructive power which make the use of many commonly used diagnostics impossible, and beams with a short life time which require minimum interference of the diagnostics. The achievable resolution of this type of monitor depends on the jet thickness and homogeneity. Detailed knowledge of the jet density profile is hence of high importance. In this contribution we present how a moveable vacuum gauge was successfully used to investigate the 3D density distribution of the jet. We compare the experimental data to results from simulations and discuss how the findings can help further improve of the overall jet design.

DOI •

reference for this paper ※ DOI:10.18429/JACoW-IBIC2016-WEPG71

Export •

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