Development of SQUID amplifier for readout electronics of Transition Edge Sensors

SEEQC is pleased to submit this phase II SBIR proposal to develop a SQUID amplifier for readout electronics of Transition Edge Sensors. This project focuses on enhancing the Superconducting QUantum Interference Device (SQUID) amplifier, a critical component in Transition Edge Sensor (TES) readout electronics. SQUID amplifiers have several parameters, including gain, power dissipation, and input impedance, that need to be optimized for different applications. The project aims to create a custom-designed SQUID amplifier with reduced thermal dissipation while meeting performance requirements. This will significantly improve TES detector arrays used in High Energy Physics (HEP) experiments, impacting researches such as direct dark matter detection, cosmic microwave background, line intensity mapping and neutrinoless double beta decay experiments. There is a great synergy with SEEQC’s business model beyond delivering components for the HEP experiments. SEEQC delivers SQUIDs sensors for SQUID microscopy that is used to analyze materials for quantum technology devices. SEEQC, a quantum computing company, is developing a low critical current Josephson junction for qubit applications, a same technology that is required to realize SQUID amplifiers with low power dissipation. Finally, a learning about measurement setup and technique and receiving trainings from national laboratory partners would enhance and strengthen SEEQC’s capability to deliver high quality devices to the market. In Phase I, SQUID amplifiers were designed and fabricated using SEEQC's standard fabrication process, working closely with scientists at Lawrence Berkeley National Laboratory. Phase II will focus on modifying designs to achieve optimal SQUID amplifier performance tailored to the unique requirements of different experiments. The goal is to develop a library of SQUID designs to cater to the diverse needs of future HEP experiments.