MEDSI2016 - List of Authors (Lemke, M.)

Paper	Title	Page
MOPE27	The Influences of Material Properties to Micro Damages on Vacuum Chamber CF Flanges	63
	S. Vilcins, M. Holz, M. Lemke, D. Nölle, Ch. Wiebers DESY, Hamburg, Germany
	The European-XFEL, a 3.3 km long X-Ray laser facility, powered by a 17.5 GeV superconducting linear accelerator, is located at DESY in Hamburg [1]. For the diagnostics ultra-high vacuum components with high mechanical precision and strict requirements on particle cleanliness had to be developed, designed and produced. For the screen system of the facility, enabling to observe the size and shape of the electron beam, massive vessels, precisely milled out of stainless steel blocks 1.4435 (316L) have been produced. For these chambers all flange-connections are milled into these blocks. This paper will report onμdamages in these integrated knife edges and will present simulations of the damage mechanisms. It will also describe the influences of material properties of two different stainless steel brands, effects on the ¿knife edge¿ due to the penetration into the gaskets as well as the non-elastic deformation of the sealing area. The dependence of tightening forces under special conditions, like the very clean conditions in particle free applications due to the non-lubricated conditions will be reported. A ¿cooking recipe¿ to avoid suchμdamages will be given.
	Poster MOPE27 [0.187 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2016-MOPE27
About •	paper received ※ 09 September 2016 paper accepted ※ 23 September 2016 issue date ※ 22 June 2017
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WEPE35	Design of Double-Walled Bellow Cooling Pipes for Silicone Oil used for the DSSC Detector Project @ European XFEL
	F. Okrent F.O., Hamburg, Germany M. Bayer, M. Lemke DESY, Hamburg, Germany
	DSSC (DEPMOS Sensor with Signal Compression) is a non-linear gain DEPFET sensor for the energy range 0.5-6 keV. This is a development project for Eu-XFEL led by the MPG’s Semiconductor Laboratory. This is a silicon detector with ~40000 um² hexagonal pixels. The Photon Science Detector Group at DESY has the responsibility for the Mechanics/Thermal Workpackage of DSSC. This presents a challenge particularly because ~400 W are put out by the electronics in the in-vacuum detector head (by sensors and electronics boards). The heat load distributes in four cooling blocks (which are movable) where the cooling-tubes welded in. The aim is to achieve -20°C sensor temperature on each Sensor (four per block). The detector components (very sensitive and expensive electronics) will be operated in vacuum. Therefore it is important that coolant-liquid is safe enclosed. From that idea starts the design of double-walled bellow cooling pipes, this has few benefits. More reliability with the silicone fluid inside the pipes to prevent the inner detector parts from condensation or leakage inside the vessel, Insulating vacuum between the coolant bellows for more performance.
	Poster WEPE35 [8.573 MB]
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

Paper

Title

Page

The Influences of Material Properties to Micro Damages on Vacuum Chamber CF Flanges

63

S. Vilcins, M. Holz, M. Lemke, D. Nölle, Ch. Wiebers
DESY, Hamburg, Germany

The European-XFEL, a 3.3 km long X-Ray laser facility, powered by a 17.5 GeV superconducting linear accelerator, is located at DESY in Hamburg [1]. For the diagnostics ultra-high vacuum components with high mechanical precision and strict requirements on particle cleanliness had to be developed, designed and produced. For the screen system of the facility, enabling to observe the size and shape of the electron beam, massive vessels, precisely milled out of stainless steel blocks 1.4435 (316L) have been produced. For these chambers all flange-connections are milled into these blocks. This paper will report onμdamages in these integrated knife edges and will present simulations of the damage mechanisms. It will also describe the influences of material properties of two different stainless steel brands, effects on the ¿knife edge¿ due to the penetration into the gaskets as well as the non-elastic deformation of the sealing area. The dependence of tightening forces under special conditions, like the very clean conditions in particle free applications due to the non-lubricated conditions will be reported. A ¿cooking recipe¿ to avoid suchμdamages will be given.

Poster MOPE27 [0.187 MB]

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2016-MOPE27

About •

paper received ※ 09 September 2016 paper accepted ※ 23 September 2016 issue date ※ 22 June 2017

Export •

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

WEPE35

Design of Double-Walled Bellow Cooling Pipes for Silicone Oil used for the DSSC Detector Project @ European XFEL

F. Okrent
F.O., Hamburg, Germany
M. Bayer, M. Lemke
DESY, Hamburg, Germany

DSSC (DEPMOS Sensor with Signal Compression) is a non-linear gain DEPFET sensor for the energy range 0.5-6 keV. This is a development project for Eu-XFEL led by the MPG’s Semiconductor Laboratory. This is a silicon detector with ~40000 um² hexagonal pixels. The Photon Science Detector Group at DESY has the responsibility for the Mechanics/Thermal Workpackage of DSSC. This presents a challenge particularly because ~400 W are put out by the electronics in the in-vacuum detector head (by sensors and electronics boards). The heat load distributes in four cooling blocks (which are movable) where the cooling-tubes welded in. The aim is to achieve -20°C sensor temperature on each Sensor (four per block). The detector components (very sensitive and expensive electronics) will be operated in vacuum. Therefore it is important that coolant-liquid is safe enclosed. From that idea starts the design of double-walled bellow cooling pipes, this has few benefits. More reliability with the silicone fluid inside the pipes to prevent the inner detector parts from condensation or leakage inside the vessel, Insulating vacuum between the coolant bellows for more performance.

Poster WEPE35 [8.573 MB]

Export •

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