Abstract
This paper introduces a Software Development Kit (SDK) that enables the creation of custom software applications that automate the control of a cryo-refrigerator (Quantum Design model GA-1) in third party instruments. A remote interface allows real time tracking and logging of critical system diagnostics such as pressures, temperatures, valve states and run modes. The helium compressor scroll capsule speed and Gifford-McMahon (G-M) cold head speed can be manually adjusted over a serial communication line via a CAN interface. This configuration optimizes cooling power, while reducing wear on moving components thus extending service life. Additionally, a proportional speed control mode allows for automated throttling of speeds based on temperature or pressure feedback from a 3rd party device. Warm up and cool down modes allow 1st and 2nd stage temperatures to be adjusted without the use of external heaters.
Highlights
Advanced cryo-refrigerator systems with enhanced functionalities such as the GA-1 cryo-refrigerator and the HAC900S variable speed compressor [1,2,3] are ideal for integration in third party instruments
The HAC 900S compressor supports a full-featured Control Area Network (CAN/CANopen) bus interface [4] that fully integrates with the other modules such as the measurement options used in the VersaLabTM Physical Property Measurement System [5]
Systems used by physicists and chemists to perform research in materials science might include a “bi-polar” power supply to charge and discharge a superconducting magnet, sensitive measurement electronics to read out Superconducting Quantum Interference Devices (SQUIDs) and other low temperature electronics
Summary
- HELIOSPHERIC INFLUENCE ON THE ANISOTROPY OF TeV COSMIC RAYS Ming Zhang, Pingbing Zuo and Nikolai Pogorelov.
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