Crymac- Cryostat Maintenance Controller

  • Reinhold J. Dorn
Conference paper
Part of the Astrophysics and Space Science Library book series (ASSL, volume 228)

Abstract

ESO has developed two types of cryostats for use with optical detector CCD systems: a bath cryostat, which has a tank of liquid nitrogen and a continuous flow cryostat that is fed from a 120 liter liquid nitrogen tank. Both types of cryostats have been designed to incorporate the same detector head, which is removable from the cryostat body. These cryostats can be split into two main parts:
  1. (l)

    The detector head which houses the CCD itself and electronics such as preamplifiers, clock/bias filters and the temperature sensors and heating elements.

     
  2. (2)

    The cryostat tank, which holds the liquid nitrogen for cooling the CCD to it’s operating temperature. The cryostat tank is supplied with two sorption pumps, which are containers filled with zeolith. These sorption pumps absorb the gas produced by outgassing of the various warm surfaces and the electronic parts inside the dewar. The capacity of the sorption pumps is not unlimited and requires a regular regeneration to provide a clean vacuum system.

     

Therefore a vacuum & temperature control box was developed to provide the temperature sensing and control of the CCD head as well as providing enough electrical power to heat the sorption pumps for regeneration during maintenance and testing in the laboratory. This vacuum and temperature control box, which is designed for laboratory use, is named CRYMAC (CRYostat Maintenance Controller).

Keywords

Cold Plate Serial Interface Detector Head Regular Regeneration European Southern Observatory 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.
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References

  1. [1]
    U.S.A, OMEGA Engineering, Inc., Worldwide Headquarters, One Omega Drive, P.O. Box 4047, Stamford, CT 06907–0047Google Scholar
  2. [2]
    Balzers Aktiengesellschaft, FL-9496 Balzers, Fuerstentum, LiechtensteinGoogle Scholar

Copyright information

© Springer Science+Business Media Dordrecht 1998

Authors and Affiliations

  • Reinhold J. Dorn
    • 1
  1. 1.Optical Detector TeamEuropean Southern ObservatoryGarchingGermany

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