Open position BEP: Characterization of the cooling power of a cryostation used for quantum applications

25.07.2025Open Position MEP/BEP

Open position BEP: Characterization of the cooling power of a cryostation used for quantum applications

Ryoichi Ishihara

Associate Professor, Group leader

Qutech, Dep. Quantum and Computer Engineering, Faculty of Electrical Engineering, Mathematics and Computer Science, Delft University of Technology

Ishihara-lab focuses on the integration technologies for unconventional electronic systems; quantum computers, quantum sensors, neuromorphic computers, and biodegradable sensors. Our work involves new materials, scalable fabrication of electronic and photonic devices, and 3D heterogeneous integration, aiming to realize unconventional electronic systems.

Characterization of the cooling power of a cryostation used for quantum applications

Quantum applications, such as quantum computers and quantum sensors, require an operating temperature in the order of a couple of milli Kelvin. The research platform that allows for such a low temperature is called a cryostation. A cryostation is composed of a cooling tower, a sample chamber, a helium compressor, and a temperature control module.

The ability of a cryostation to remove heat from inside it is called the *cooling power*. In other words, the cooling power measures how much power can be dissipated in the cryostation without increasing the temperature inside it. Because quantum applications are sensitive to temperature fluctuations, it is pivotal to accurately characterize the cooling power of a cryostation over a wide range of temperatures.The purpose of this BSc project is to characterize the cooling power of the Montana Cryostation s100 located in the DL laboratory of Prof. Ryoichi Ishihara. The student will review the necessary components, namely the temperature sensor, the power dissipator, and the waveform generator, and design an experimental setup to characterize the cooling power of the cryostation from 300 K to 4 K. The results will help better characterize superconducting materials that are used in quantum computer applications at Prof. Ryoichi’s laboratory.

**References:**

[1] *System User Manual Cryostation s-series*, Version 3.7. Montana Instruments, October 2023.

**Interested? Please contact Ryoichi Ishihara** **r.ishihara@tudelft.nl** or Wagno Bragança <W.Braganca@tudelft.nl>

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