ALMA Memo 547 Estimate of the ALMA Cryostat Hold Time

Antenna beam pattern evaluation of ALMA band 9 subsystem

This report describes band 9 beam pattern measurements which were made at NA ALMA front end integration center during the visit of ALMA band 9 group representatives from 2 to 7 of June 2008. The Band 9 cartridge system was mounted within ALMA front end cryostat #2 and the overall system included the cryostat window and filters. Measurement set-up, experiment condition and sequence and results o...

ALMA Memo No. 324 Proposal for ALMA Front End Optics

ALMA MEMO 551 Cross-polarization characterization of GORE–TEXr slabs at band 9 frequencies

GORE–TEXr material, commonly used in radomes, is known to be transparent at microwave bands [1]. In ALMA a thin GORE–TEXr membrane will cover the aperture through which the RF beam enters the cabin at the primary vertex hole [2]. Slabs of GORE–TEXr are also generally employed in windows for intermediate temperature shields inside the cryostat. The purpose of these windows ideally is to allow th...

Some biological parameters of Silver Crucian carp, Carassius auratus, in the international wetlands of Alma-Gol and Ala-Gol (Golestan Province, Iran)

In the present study, age, growth and reproduction of Carassius auratus were investigated in the Alma-Gol and Ala-Gol (northern Iran) from September 2000 to August 2002. Among the total of 1450 specimens, the estimated ages ranged from 0+ to 8+ years. C. auratus showed an allometric growth, negatively in Alma-Gol and positively in Ala-Gol. The von Bertalanffy growth curves were fitted to mean t...

ALMA Memo #272 IMAGE FIDELITY: IMPLICATIONS FOR ALMA

This memo presents the case for adding smaller antennas to the ALMA array. Smaller, higher precision antennas are better able to exploit the excellent submillimeter potential of the 5000 m altitude site, and are better matched to the angular size of many submillimeter sources. Model studies show that the image delity of mosaiced observations with the ALMA array will be limited by pointing and s...