Author: Jared Males

We’re on our way home, leaving behind a fixed, upgraded, and working MagAO-X. Ready to go for 2024B.

A Goodbye

While we were there they had just finished stripping parts from the famous “NAS” from the venerable MagAO. They loaded it up to take it down the hill to the bodega, where it will be taken apart and scrapped.

Thanks for all the memories.

A See You Later

Been seeing this flashback inducing metro-blue forecast for a couple days:

And it was rolling in as we loaded up the van:

But MagAO-X is safe in the cleanroom, waiting its next shot at the telescope.

Mysteries For Next Time

The current drama (for us, anyway) is that they have (again) done away with the agua con gas. It does produce a lot of plastic waste, but it was maybe the most discussed amenity by members of the MagAO-X traveling circus.

It appears that the solution is these “soda guns”. But none of use were brave enough to try them out. So next time then.

The other mystery involves the goat herd that was roaming, and shitting, all over the mountain. First, a reminder that goats are cute

So either the goats have a dog, or this dog has goats.

Now we have questions about this dog’s life.

So here’s the question: how does the dog stay alive? We hear that maybe there is a camp nearby. But how does it work? Does the dog herd the goats there once a day? Or does the dog have to wait until the goats decide to go back? Is there a signal?

Walk, not Run

It was a gorgeous day in Santiago. Jay and I took our time and just walked from place to place. It’s the little things.

The succulent wall was as stunning as ever — it always looks extra special when the sun is out.

Lab Rules

For the last god damn time, bring a god damn flashlight when you go to an observatory. We work in the dark. It’s what we do. Your cell phone does not count. When everyone has to share the PI’s flashlight . . .

And a new one. And it’s kind of a big deal, because in over a decade we’ve never had a rule about the blog rules other than whoever posts the first post of a run gets to set them. But from now on, your rules must not set a limit on the number of days in the run. In hind sight it’s just a classic Murphy’s Law blunder. (TBC, I liked these rules, it was fun to look up songs by decades — I was surprised by where a few landed. I just didn’t think about the ramifications until the day we started rescheduling flights and I remembered the ? in the rules . . .)

So here’s a song from the 2020’s. Hoping our last flight to Tuscon goes through because if it doesn’t I don’t know what we’ll do — other than blame the blog rules.

One of the big goals for this visit to LCO was to troubleshoot a coupled pair of actuators on our precious 2040 actuator “tweeter” deformable mirror (DM). Being coupled meant that when we poked actuator 498, actuator 650 moved (not 498). Actuator 650 also moved when we poked 650. We first noticed this problem after shipping MagAO-X in March, when we ran a post-cabling function test. However, digging through our archives we found that it showed up back in November, 2023, but we just didn’t notice.

Now our tweeter is expensive. So we don’t like it when things go wrong, and it makes messing with it really stressful. But having those two actuators acting up means MagAO-X didn’t work perfectly, so we had to do what we can to fix it. We deferred it until after our March and April runs to give us time to plan and do it right.

We can all breathe a sigh of relief: with only minimal shenanigans we got it fixed. After testing various potential cabling problems, we found that a circuit board just needed to be replaced. We had a spare, popped it in, and the couple had split up and gone back to behaving normally.

And we got that done in time for Empanada Sunday:

After lunch we got onto the next set of tasks, which included disassembling a rack shelf so we can get better airflow.

We’re also upgrading the Instrument Control Computer (ICC) to go faster and do more stuff. We like to liquid cool our CPUs and GPUs. Normally we rig that up in Tucson, but we couldn’t get all of the components from our usual supplier in time, so we shipped what we had (and found some substitutes on Amazon!) and are doing some clean room plumbing.

Jay has also been leading the assembly and testing of new ICC. Other than the liquid cooling parts, it was fully working in Tucson before we took it apart to ship it down here. We’re getting it all back together.

Even after our delayed departure, we are making good time thanks to the relatively easy fix to the tweeter. I haven’t had enough running on this trip yet, so I took some time before dinner to go circle around the 100″.