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SPIE Astronomical Telescopes + Instrumentation 2024

Event details:
Date & time
Yokohama, Japan
  • Science

SPIE Astronomical Telescopes + Instrumentation is a technical event for ground-based, airborne, and space-based telescopes, and their supporting instrumentation. With a strong program and an active community, this event allows researchers and engineers to share advancements, discoveries, challenges, and project updates with colleagues from around the world.

Held every two years, the 2024 conference will take place in Yokohama, Japan. We will join the conference as an exhibitor showcasing both our Bluefors and Cryomech products. Meet us at booth #310!

We will have a paper presentation during the conference, see the exact details below.

Conference presentation: Experimental investigation on the tilted performance of 4 K two-stage pulse tube cryocoolers for Cosmic Microwave Background (CMB) Telescopes

The 4 K two-stage pulse tube cryocoolers have been used in Cosmic Microwave Background (CMB) Telescopes to increase the sensitivity of instruments and enable low temperature detector technologies. Bluefors Cryocooler Technologies has been continuously improving cooling capacity and energy efficiency of its 4.2 K two-stage pulse tube cryocoolers. The two newest models, the PT425 (2.7 W at 4.2 K) and PT450 (5.0 W at 4.2 K), have been successfully developed and launched in 2021 and 2023, respectively. The PT450 is the world’s largest, commercially available, 4 K pulse tube cryocooler, which provides a minimum of 5.0 W at 4.2 K on the 2nd stage with 65 W at 45 K on the 1st stage simultaneously. The cooling performance of a pulse tube cryocooler is tied to the tilt angle of the system relative to the gravity vector, such that the cooling capacity decreases as a function of the tilt angle. The gas gravitational effect on the cooling performance of the PT425 and PT450 has been experimentally investigated. Test results of the tilt angles ranging from 0° (vertical) to 60° are presented in this paper, providing an accurate reference for the tilted cryogenic system design in CMB telescopes.

Date: Thursday June, 20, 2024, 5:30 PM

Presenter: Dr. Xihuan Hao, Cryogenic Research & Development Engineer

Application track: Radio Astronomy