[asac] [almanews] ALMA Memo 340 Released

[Carolyn White]

ALMA Memo #340

Measurements of Commercial Vacuum Windows for ALMA Bands 3 and 6 

G. A. Ediss, S.-K. Pan, J. Effland, and T. Globus

December 05, 2000

The measurements made here confirm those made by the manufacturer of the
QMC100 (ALMA band 3) and QMC230 (ALMA band 6) windows, and show that the
in-band loss (absorption and reflection) of the windows is of order of
2-5% over the whole band.  Thus, at least one commercial source has been
found for vacuum windows for ALMA receivers. The manufacturer believes
that they can supply similar windows for all ALMA bands.

View a PDF version of ALMA Memo #340 at
http://www.alma.nrao.edu/memos/html-memos/alma340/memo340.pdf

Download a postscript version of ALMA Memo #340 from
http://www.alma.nrao.edu/memos/html-memos/alma340/memo340.ps
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