IBIC2013 - List of Authors (Hansli, M.)

Paper

Title

Page

Current Status of the Schottky Cavity Sensor for the CR at FAIR

907

M. Hansli, R. Jakoby, A. Penirschke
TU Darmstadt, Darmstadt, Germany
P. Hülsmann, W. Kaufmann
GSI, Darmstadt, Germany

Funding: This work was supported by the GSI. The author would like to thank the CST AG for providing CST Studio Suite.
In this paper the current status of the Schottky Cavity Sensor development for the Collector Ring at FAIR, a dedicated storage ring for secondary particles, rare isotopes, and antiprotons, is presented. Designed for longitudinal and transversal Schottky signals, the Sensor features a pillbox cavity with attached waveguide filters utilizing the Monopole mode at 200 MHz for longitudinal and the Dipole mode at around 330 MHz for transversal Schottky measurements. Separated coupling structures allow for mode-selective coupling to measure the different Schottky planes independently. A ceramic vacuum shielding inside the pillbox is implemented to enable non-hermetic adjustable coupling, tuning devices and waveguide structures. Simulations of the structure with focus on the impact of the coupling structures and the ceramic vacuum shielding on the R-over-Q values and the coupling are presented as well as measurements of a scaled demonstrator including comparisons with the simulations.

FRWMJ3

Cavity Design Questions

M. Hansli
TU Darmstadt, Darmstadt, Germany

Matthias presented two cavity designs. His waveguide loaded 3 GHz monopole mode resonator is optimized as phase detector for low charge beams in a plasma wakefield experiment. We discussed his questions on the options of the waveguide-to-coaxial coupling, which often are very pragmatic, personal engineering solutions, sometimes just a matter of “taste”. His 2nd design was a dipole mode resonator, to be used as a Schottky pickup for FAIR (GSI). He shared some details on the optimization of the geometry, e.g. to maximize the R/Q. We agreed that he did a good job, and addressed most design issues very systematically.

Slides FRWMJ3 [0.191 MB]

Paper	Title	Page
WEPF35	Current Status of the Schottky Cavity Sensor for the CR at FAIR	907
	M. Hansli, R. Jakoby, A. Penirschke TU Darmstadt, Darmstadt, Germany P. Hülsmann, W. Kaufmann GSI, Darmstadt, Germany
	Funding: This work was supported by the GSI. The author would like to thank the CST AG for providing CST Studio Suite. In this paper the current status of the Schottky Cavity Sensor development for the Collector Ring at FAIR, a dedicated storage ring for secondary particles, rare isotopes, and antiprotons, is presented. Designed for longitudinal and transversal Schottky signals, the Sensor features a pillbox cavity with attached waveguide filters utilizing the Monopole mode at 200 MHz for longitudinal and the Dipole mode at around 330 MHz for transversal Schottky measurements. Separated coupling structures allow for mode-selective coupling to measure the different Schottky planes independently. A ceramic vacuum shielding inside the pillbox is implemented to enable non-hermetic adjustable coupling, tuning devices and waveguide structures. Simulations of the structure with focus on the impact of the coupling structures and the ceramic vacuum shielding on the R-over-Q values and the coupling are presented as well as measurements of a scaled demonstrator including comparisons with the simulations.

FRWMJ3	Cavity Design Questions
	M. Hansli TU Darmstadt, Darmstadt, Germany
	Matthias presented two cavity designs. His waveguide loaded 3 GHz monopole mode resonator is optimized as phase detector for low charge beams in a plasma wakefield experiment. We discussed his questions on the options of the waveguide-to-coaxial coupling, which often are very pragmatic, personal engineering solutions, sometimes just a matter of “taste”. His 2nd design was a dipole mode resonator, to be used as a Schottky pickup for FAIR (GSI). He shared some details on the optimization of the geometry, e.g. to maximize the R/Q. We agreed that he did a good job, and addressed most design issues very systematically.
	Slides FRWMJ3 [0.191 MB]