CERN Accelerating science

Published Articles
Report number	CERN-ACC-2015-301
Title	Development of a Supersonic Gas-jet Monitor to Measure Beam Profile Non-destructively
Author(s)	Zhang, Hao (Cockcroft Inst. Accel. Sci. Tech. ; U. Liverpool (main)) ; Jeff, Adam (CERN ; Cockcroft Inst. Accel. Sci. Tech. ; U. Liverpool (main)) ; Tzoganis, Vasilis (Cockcroft Inst. Accel. Sci. Tech. ; U. Liverpool (main) ; Nishina Ctr., RIKEN) ; Welsch, Carsten (Cockcroft Inst. Accel. Sci. Tech. ; U. Liverpool (main))
Publication	2016
Number of pages	3
In:	6th International Particle Accelerator Conference, Richmond, VA, USA, 3 - 8 May 2015, pp.MOPWI006
Subject category	Accelerators and Storage Rings
Abstract	The measurement of the transverse beam profile is a great challenge for high intensity, high brightness and high power particle beams due to their destructive power. Current non-destructive methods such as residual gas monitors and beam induced fluorescence monitors either require a rather long integration time or residual gas pressures in the order of 10⁻⁷ mbar to make meaningful measurements. A supersonic gas-jet beam profile monitor has been developed by QUASAR group at the Cockcroft Institute, UK and promises significant improvements over these established techniques. In this monitor, a supersonic gas curtain is generated that crosses the beam to be analyzed under an angle of 45°. When both beams interact, ionization of the gas jet particles occurs and these ions are then accelerated by an electrostatic extraction field towards a Micro Channel Plate (MCP). Beam images are then obtained via a phosphor screen-CCD camera combination. In this contribution, we discuss the monitor design and present beam profile measurements of a 5 keV electron beam. These are complemented by results from measurements using a pulsed valve to study the gas jet dynamics.
Copyright/License	publication: © 2015-2024 The Author(s) (License: CC-BY-3.0)

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