1. Devices for Thermal Conductivity Measurements of Electroplated Bi for X-ray TES Absorbers.
- Author
-
Quaranta, Orlando, Gades, Lisa M., Xue, Cindy, Divan, Ralu, Miller, C. Suzanne, Patel, Umeshkumar M., Guruswamy, Tejas, and Miceli, Antonino
- Subjects
- *
THERMAL conductivity measurement , *THERMAL conductivity , *X-rays , *THERMOELECTRIC materials , *HEAT capacity - Abstract
Electroplated bismuth (Bi) is commonly used in transition-edge sensors (TESs) for X-rays because of its high stopping power and low heat capacity (Collan in Phys Rev B 1:2888, 1970, Yan in Appl Phys Lett 111:192602, 2017). Electroplated Bi is usually grown on top of another metal that acts as seed layer, typically gold (Au), making it challenging to extrapolate its thermoelectric properties. In this work, we present four-wire resistance measurement structures that allow us to measure resistance as a function of temperature of electroplated Bi independently of Au. The results show that the thermal conductivity of the Bi at 3 K is high enough to ensure the correct thermalization of X-ray photons when used as an absorber for TESs. [ABSTRACT FROM AUTHOR]
- Published
- 2022
- Full Text
- View/download PDF