COOL2023 - List of Authors (Stassen, R.)

Paper	Title	Page
THPOSRP07	An Optimized Delay Line with Temperature Compensation	65
	N. Shurkhno, A. Kononov GSI, Darmstadt, Germany R. Stassen FZJ, Jülich, Germany
	This paper describes the design and development of a low-loss, low-latency optical delay line that provides temperature stability within a given temperature range. Such delays are of particular interest for stochastic cooling systems, where they are used to synchronize a system’s correction pulse and in a feedforward loop of optical comb filters. However, commercially available optical delay lines have certain disadvantages for stochastic cooling - large intrinsic delay, high and non-constant optical attenuation, and overall delay drift due to temperature-dependent optical fibers. To mitigate these problems, an optimized optical delay line has been developed for the stochastic cooling systems of the COSY (FZ Jülich, Germany) and HESR (FAIR, Germany) accelerator facilities.
	Poster THPOSRP07 [1.404 MB]
DOI •	reference for this paper ※ doi:10.18429/JACoW-COOL2023-THPOSRP07
About •	Received ※ 25 October 2023 — Revised ※ 31 October 2023 — Accepted ※ 21 November 2023 — Issued ※ 02 December 2023
Cite •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

THPOSRP23	Kicker for the CR Stochastic Cooling System Based on HESR Slot-Ring Coupler	106
	R. Stassen, R. Greven, H. Schneider, J. Wolters FZJ, Jülich, Germany B. Breitkreutz GSI, Darmstadt, Germany
	A ’light’ version of the HESR stochastic cooling system was already successfully tested in the Cooler Synchrotron COSY. There the stochastic cooling was operated together with the original PANDA cluster jet target from University Münster. The system layout includes all components as planned for the HESR like low noise amplifier, switchable delay-lines and optical notch-filter. The robust split ring design has been proven itself. Hence it was decided to use this concept for the CR kicker as well. Therefore the parameters need to be adapted for the CR cooling system. However, the significantly higher RF power requires a new cooling concept for the heat dissipated in the divider board resistors. First simulations and measurements show that using heat pipes could be a possible solution. At COOL23 main parameter as well as the promising results will be presented.
DOI •	reference for this paper ※ doi:10.18429/JACoW-COOL2023-THPOSRP23
About •	Received ※ 20 September 2023 — Revised ※ 10 October 2023 — Accepted ※ 21 November 2023 — Issued ※ 02 December 2023
Cite •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

Paper

Title

Page

An Optimized Delay Line with Temperature Compensation

65

N. Shurkhno, A. Kononov
GSI, Darmstadt, Germany
R. Stassen
FZJ, Jülich, Germany

This paper describes the design and development of a low-loss, low-latency optical delay line that provides temperature stability within a given temperature range. Such delays are of particular interest for stochastic cooling systems, where they are used to synchronize a system’s correction pulse and in a feedforward loop of optical comb filters. However, commercially available optical delay lines have certain disadvantages for stochastic cooling - large intrinsic delay, high and non-constant optical attenuation, and overall delay drift due to temperature-dependent optical fibers. To mitigate these problems, an optimized optical delay line has been developed for the stochastic cooling systems of the COSY (FZ Jülich, Germany) and HESR (FAIR, Germany) accelerator facilities.

Poster THPOSRP07 [1.404 MB]

DOI •

reference for this paper ※ doi:10.18429/JACoW-COOL2023-THPOSRP07

About •

Received ※ 25 October 2023 — Revised ※ 31 October 2023 — Accepted ※ 21 November 2023 — Issued ※ 02 December 2023

Cite •

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

THPOSRP23

Kicker for the CR Stochastic Cooling System Based on HESR Slot-Ring Coupler

106

R. Stassen, R. Greven, H. Schneider, J. Wolters
FZJ, Jülich, Germany
B. Breitkreutz
GSI, Darmstadt, Germany

A ’light’ version of the HESR stochastic cooling system was already successfully tested in the Cooler Synchrotron COSY. There the stochastic cooling was operated together with the original PANDA cluster jet target from University Münster. The system layout includes all components as planned for the HESR like low noise amplifier, switchable delay-lines and optical notch-filter. The robust split ring design has been proven itself. Hence it was decided to use this concept for the CR kicker as well. Therefore the parameters need to be adapted for the CR cooling system. However, the significantly higher RF power requires a new cooling concept for the heat dissipated in the divider board resistors. First simulations and measurements show that using heat pipes could be a possible solution. At COOL23 main parameter as well as the promising results will be presented.

DOI •

reference for this paper ※ doi:10.18429/JACoW-COOL2023-THPOSRP23

About •

Received ※ 20 September 2023 — Revised ※ 10 October 2023 — Accepted ※ 21 November 2023 — Issued ※ 02 December 2023

Cite •

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