Timeline for What's the status and timeline for Millimetron? (Russia's 10m Deployable Antenna cooled to 6 K Earth-Space VLBI)
Current License: CC BY-SA 4.0
7 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| Sep 22, 2020 at 17:43 | vote | accept | uhoh | ||
| Sep 13, 2020 at 18:02 | comment | added | uhoh | I see, Millimetron seems to be only 10 meter in diameter and in a vacuum, but if this is much larger, it's not at all possible. :-) | |
| Sep 13, 2020 at 17:19 | comment | added | A. Rumlin | I think that it is impossible to cool a mirror with an area of 2500 square meters. | |
| Sep 13, 2020 at 17:10 | comment | added | uhoh | Cooling the receiver front-end amplifier yes, but the image in my question shows what looks like heat shields around the reflector. I'm thinking that Millimetron will have a cold reflector dish (not just the receiver) and wondering if the ground station will need that too. | |
| Sep 13, 2020 at 16:21 | comment | added | A. Rumlin | Cooling with helium or nitrogen has been around since at least the 1960s. System noise temperature for this antenna - 2000K. The main feature of the antenna is the special precision of the mirror shape. However, there are spare old RT-70 antennas that are now also in the process of being upgraded to 2030. | |
| Sep 13, 2020 at 15:10 | comment | added | uhoh | Thanks! This makes sense; the VLBI will need at least two stations. Space is needed for the very long baseline, not to get above the atmosphere, so the ground station needs to be up and running and the receiver front end proven first. I wonder if the plan is for this dish to be cooled as well? | |
| Sep 13, 2020 at 14:33 | history | answered | A. Rumlin | CC BY-SA 4.0 |