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Space Science Reviews

, Volume 74, Issue 1–2, pp 229–235 | Cite as

A novel bolometer for infrared and millimeter-wave astrophysics

  • J. J. Bock
  • D. Chen
  • P. D. Mauskopf
  • A. E. Lange
Article

Abstract

We are developing a novel bolometer which uses a fine mesh to absorb radiation. The filling factor of the mesh is small, providing a small heat capacity and a low geometric cross-section to cosmic rays. The mesh is patterned from a free-standing silicon nitride membrane and is thermally isolated by long radial legs of silicon nitride. A thin metallic film evaporated on the mesh absorbs radiation by matching the surface impedance to that of free space. A neutron transmutation doped germanium thermistor attached to the center of the mesh detects the temperature increase from absorbed radiation. The low thermal conductivity and heat capacity of silicon nitride provide improved performance in low background applications. We discuss the theoretical limits of the performance of these devices. We have tested a device at 300 mK with an electricalNEP=4×10−17 W Hz−1/2 and a time constant τ=40 ms.

Keywords

Thermal Conductivity Heat Capacity Germanium Silicon Nitride Filling Factor 
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. Alsop, D., Inman, C., Lange, A. E., Wilbanks, T.: 1992, ‘Design and Construction of High-Sensitivity, Infrared Bolometers for Operation at 300 mK’,Appl. Opt. 31, 6610.Google Scholar
  2. Devlin, M., Lange, A. E., Wilbanks, T., Sato, S.: 1993, ‘A DC-Coupled, High Sensitivity Bolometric System for the Infrared Telescope in Space’,IEEE Trans. Nuc. Sci. 40, 162.Google Scholar
  3. Holmes, W.: 1994, priv. comm.Google Scholar
  4. Koshchenko, V. I., Grinberg, Ya. Kh.: 1982, ‘Thermodynamic Properties ofSi 3 N 4’,Neorganicheskie Materialy 18, 1064.Google Scholar
  5. Mather, J.: 1984, ‘Bolometers: Ultimate Sensitivity, Optimization, and Amplifier Coupling’,Appl. Opt. 23, 584.Google Scholar
  6. Ulrich, R.: 1967, ‘Far-Infrared Properties of Metallic Mesh and Its Complementary Structure’,Inf. Physics 7, 37.Google Scholar

Copyright information

© Kluwer Academic Publishers 1995

Authors and Affiliations

  • J. J. Bock
    • 1
  • D. Chen
    • 1
  • P. D. Mauskopf
    • 1
  • A. E. Lange
    • 1
  1. 1.Dept. of PhysicsUniversity of CaliforniaBerkeley

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