A forced gas-cooled single-disk window using silicon nitride composite for high power CW millimeter waves

T. Shimozuma; S. Morimoto; M. Sato; Y. Takita; S. Ito; S. Kubo; H. Idei; K. Ohkubo; T. Watari

doi:10.1007/BF02678306

A forced gas-cooled single-disk window using silicon nitride composite for high power CW millimeter waves

T. Shimozuma, S. Morimoto, M. Sato, Y. Takita, S. Ito, S. Kubo, H. Idei, K. Ohkubo, T. Watari

Research output: Contribution to journal › Article › peer-review

8 Citations (Scopus)

Abstract

Silicon nitride composite as a candidate of a window material for high power CW (Continuous Wave) millimeter-waves was high power tested especially with a surface cooling by impinging gas nitrogen jets on the single-disk surface. Gas-cooling dramatically suppressed the temperature of the window disk even with gas flow rate of around 100 1/min. With gas cooling of 4651/min., 130kW CW power of HE₁₁ mode could be transmitted through the silicon nitride window with a diameter of 88.9mm. The peak window temperature was completely saturated on 123.6°C. Without gas-cooling it did not saturate and reached 323°C during 30 seconds pulse. A possibility of 1MW CW single disk Brewster windows with a forced gas-cooling is discussed, resulting in convinced prospects of the windows with realistic size and thickness.

Original language	English
Pages (from-to)	1479-1493
Number of pages	15
Journal	International Journal of Infrared and Millimeter Waves
Volume	18
Issue number	8
DOIs	https://doi.org/10.1007/BF02678306
Publication status	Published - Aug 1997
Externally published	Yes

All Science Journal Classification (ASJC) codes

Radiation
Atomic and Molecular Physics, and Optics
Instrumentation
Condensed Matter Physics
Physics and Astronomy (miscellaneous)
Electrical and Electronic Engineering

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A forced gas-cooled single-disk window using silicon nitride composite for high power CW millimeter waves. / Shimozuma, T.; Morimoto, S.; Sato, M.; Takita, Y.; Ito, S.; Kubo, S.; Idei, H.; Ohkubo, K.; Watari, T.

In: International Journal of Infrared and Millimeter Waves, Vol. 18, No. 8, 08.1997, p. 1479-1493.

Research output: Contribution to journal › Article › peer-review

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AU - Morimoto, S.

AU - Sato, M.

AU - Takita, Y.

AU - Ito, S.

AU - Kubo, S.

AU - Idei, H.

AU - Ohkubo, K.

AU - Watari, T.

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AB - Silicon nitride composite as a candidate of a window material for high power CW (Continuous Wave) millimeter-waves was high power tested especially with a surface cooling by impinging gas nitrogen jets on the single-disk surface. Gas-cooling dramatically suppressed the temperature of the window disk even with gas flow rate of around 100 1/min. With gas cooling of 4651/min., 130kW CW power of HE11 mode could be transmitted through the silicon nitride window with a diameter of 88.9mm. The peak window temperature was completely saturated on 123.6°C. Without gas-cooling it did not saturate and reached 323°C during 30 seconds pulse. A possibility of 1MW CW single disk Brewster windows with a forced gas-cooling is discussed, resulting in convinced prospects of the windows with realistic size and thickness.

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