MEDSI2023 - List of Authors (Kakizaki, D.Y.)

Paper	Title	Page
TUPYP004	A Setup for the Evaluation of Thermal Contact Resistance at Cryogenic Temperatures Under Controlled Pressure Rates	37
	B.A. Francisco, D.Y. Kakizaki, M. Saveri Silva, W.H. Wilendorf, V.B. Zilli, G.S. de Albuquerque LNLS, Campinas, Brazil V.C. Kuriyama CNPEM, Campinas, SP, Brazil A. Lopes Ribeiro Federal University of Uberlandia, Uberlândia, M.G., Brazil J.H. dos Santos IF-UFRGS, Porto Alegre, Brazil
	The design of optical elements compass different development areas, such as optics, structures and dynamics, thermal, and control. In particular, the thermal designs of mirrors aim to minimize deformations, whose usual requirements are around 5 nm RMS and slope errors in the order of 150 nrad RMS. One of the main sources of uncertainties in thermal designs is the inconsistency in values of thermal contact resistances (TCR) found in the literature. A device based on the ASTM D5470 standard was proposed and designed to measure the TCR among materials commonly used in mirror systems. Precision engineering design tools were used to deal with the challenges related to the operation at cryogenic temperatures (145 K) and under several pressures rates (1~10 MPa) whilst ensuring the alignment between the specimens. We observed using indium as Thermal Interface Material reduced the TCR in 10~42,2% for SS316/Cu contacts, and 31~81% for Al/Cu. Upon analyzing the measurements, we identified some areas for improvements in the equipment, such as mitigating radiation and improving the heat flow in the cold part of the system that were implemented for the upgraded version.
	Poster TUPYP004 [2.549 MB]
DOI •	reference for this paper ※ doi:10.18429/JACoW-MEDSI2023-TUPYP004
About •	Received ※ 02 November 2023 — Revised ※ 06 November 2023 — Accepted ※ 09 November 2023 — Issued ※ 22 April 2024
Cite •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

Paper

Title

Page

A Setup for the Evaluation of Thermal Contact Resistance at Cryogenic Temperatures Under Controlled Pressure Rates

37

B.A. Francisco, D.Y. Kakizaki, M. Saveri Silva, W.H. Wilendorf, V.B. Zilli, G.S. de Albuquerque
LNLS, Campinas, Brazil
V.C. Kuriyama
CNPEM, Campinas, SP, Brazil
A. Lopes Ribeiro
Federal University of Uberlandia, Uberlândia, M.G., Brazil
J.H. dos Santos
IF-UFRGS, Porto Alegre, Brazil

The design of optical elements compass different development areas, such as optics, structures and dynamics, thermal, and control. In particular, the thermal designs of mirrors aim to minimize deformations, whose usual requirements are around 5 nm RMS and slope errors in the order of 150 nrad RMS. One of the main sources of uncertainties in thermal designs is the inconsistency in values of thermal contact resistances (TCR) found in the literature. A device based on the ASTM D5470 standard was proposed and designed to measure the TCR among materials commonly used in mirror systems. Precision engineering design tools were used to deal with the challenges related to the operation at cryogenic temperatures (145 K) and under several pressures rates (1~10 MPa) whilst ensuring the alignment between the specimens. We observed using indium as Thermal Interface Material reduced the TCR in 10~42,2% for SS316/Cu contacts, and 31~81% for Al/Cu. Upon analyzing the measurements, we identified some areas for improvements in the equipment, such as mitigating radiation and improving the heat flow in the cold part of the system that were implemented for the upgraded version.

Poster TUPYP004 [2.549 MB]

DOI •

reference for this paper ※ doi:10.18429/JACoW-MEDSI2023-TUPYP004

About •

Received ※ 02 November 2023 — Revised ※ 06 November 2023 — Accepted ※ 09 November 2023 — Issued ※ 22 April 2024

Cite •

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