Frazer Owen responded that this question was a scientific issue, which had already been discussed and decided. Some e-mail comments were also circulated after the meeting. The committee seemed about equally split on the relative pros and cons of one large Dewar containing all receiver inserts, versus a scheme of 2 separate Dewars. This split applied to the NRAO staff, and to the non-NRAO experts. There are good arguments on both sides.
More detailed information is needed on thermal loads.
The reliability question is of utmost importance. It is not yet possible to make a clear decision on the 1 or 2 Dewar question. The next meeting of the MMA Receiver Advisory Group is planned as usual for the third Wednesday of the month, which will be December 17th . A reminder and detailed agenda will be sent out closer to the meeting.