Systems for Aerospace and Astronomy
Janis has manufactured many custom designed cryogenic systems for aerospace and astronomy.
Existing designs include:
JDry-100-ACTPol Cryogen Free Dilution Refrigerator for the Atacama Cosmology Telescope (ACT)
Janis Research’s ultra low temperature (ULT) group is proud to announce that it has developed, in collaboration with multi-agency scientific collaboration team called ACTPol, a new pulse-tube cooled cryogenic platform for the Atacama Cosmology Telescope (ACT). The ACT is a six-meter Gregorian telescope located at an altitude of 5,200 meters (17,000 ft) on Cerro Toco, in Northern Chile, and is dedicated to studies of the structure and evolution of the early universe through direct observation of the Cosmic Microwave Background (CMB) radiation at different polarizations and with arcminute resolution.
Cryogen Free Dilution Refrigerator for Astronomy (Model JDry-100-ASTRA)
Janis Research has successfully tested a JDry-100-ASTRA cryogen free 3He-4He dilution refrigerator, which has an ability to work in a wide range of tilting angles -20 to +53 degrees from vertical, providing cooling power to a novel type of sensor for cosmic microwave background studies.
The instrument will be installed in the cryogenic laboratory of the Physics Department of the University of Trento, in the framework of the MEMS collaboration between Istituto Nazionale di Fisica Nucleare (INFN) and the Istituto di Ricerca Sceintifica e Tecnologica of the Fondazione Bruno Kessler (FBK-irst). The telescope will be used to test at very low temperature arrays of resonating bolometers (MKID) to be used for the CMB polarization measurement on future space missions and ground based experiments.
The system employs a power-savvy and quiet pulse tube cryocooler with remote distribution valve. It takes only 40 hours to cool to the base temperature of 15 mK thanks to a common vacuum space and efficient mechanical heat-switch design.
The current system has a measured cooling power of 120 microwatts at 100 mK with a single mechanical vane pump, and can be upgraded to an automated gas handling system, Janis model GHS2, equipped with a more powerful oil-free hermetic 6-stage Roots pump. This upgrade ensures full remote control of the cooling process, as well as higher cooling power.
Products for Exo-atmospheric Research and Astronomy
Under the umbrella of the custom cryogenics line, Janis Research has cooperated with NASA on several programs. This cooperation has extended over several areas of interest.
The ARC Argus program, successor to the ATLAS program, investigated the upper atmosphere from a balloon platform. (See photo to the right) Of interest to the program was the tracking of inert tracer molecules for determining direction and speed.
The Jet Propulsion Laboratory, in cooperation with Janis, produced the first viable test hardware on the SIRTF program. This project involved a mirror test and qualification operating at liquid Helium temperatures. Sponsored by the LTS&E group, Janis received a Public Service Group Achievement Award for this program.
NASA GSFC worked with Janis on the AImS camera testing requirements. Working with UMD and the GSFC Planetary Systems group, Janis developed a test enclosure to mimic the Mars environment for earth-bound terrain testing.
Solid Neon Shielded Superfluid Helium Cryostat for Micro Gravity Studies in the Space Shuttle Environment
In 2000, Janis received its second NASA Public Service Group Achievement Award, again from the Jet Propulsion Laboratory. This time it was for Janis' performance on the FACET program, the development of a cryostat to comply with the Shuttle Hitchhiker program and providing a platform for microgravity experimentation. This second PSGAA, for a small company, is without precedent in the history of the JPL program and perhaps in all of NASA.
High-cooling Power Test Chamber
The chamber shown on the right is designed to provide a cryogenic work environment with an available temperature range of 20 K - 300 K. NASA intends for this chamber to become a multi-purpose instrument, capable of performing a wide variety of experiments. Initially, NASA will use the chamber to test and evaluate the performance of space qualified stepper motors. These motors will be used on rover vehicles in future Moon and Mars missions. The output of the stepper motor will be connected to a dynamometer outside the chamber, and the power, torque and other performance characteristics will be measured at various temperatures.
Contact Janis today for details of how our systems can be integrated into your laboratory.