Yup, though the $50K was specifically the R&D cost to develop a technique for making the lens. It used a nano-scale pattern on glass to focus light via diffraction, as opposed to standard refractive lenses or mirrors. The ultimate goal was to develop a process for manufacturing these lenses en masse, for deployment in a large particle detector where traditional lenses wouldn’t work. They succeeded, and nowadays (6 years later), they can basically print the pattern using the same techniques as in microchip manufacturing. Back then, though, there was just then one prototype that represented that $50K of research, so I am really glad I didn’t fuck it up haha

In my first year of grad school, I was visiting a colleague’s lab and was asked if I wanted to test some of their new diffractive optics. I said sure and started toying with the big lens on the table, no gloves, no precautions other than trying not to drop/smudge it. After about 5 minutes of geeking out over the fact that a perfectly flat, transparent lens was focusing the light, I asked how much it would cost to get one sent to my lab for an experiment I was working on. He said that it was the only one of its kind in existence, but the manufacturing r&d cost for it was over $50K alone. My heart nearly fell outta my chest.

I am very happy that 75% of my PhD in particle physics was hands-on lab work doing detector R&D. Sure, creating simulations and doing data analysis are immensely important, and skills I had to develop, but I think that many scientists are being done a disservice by not getting the opportunity to see how their work will interface in the real world.

The assignment was to infodump, so I will take that as a compliment. I was aiming for detailed and hyperspecific.

I’ve seen things. Things you’d never understand. All I can say is that the best dissertation defense is a good dissertation offense. So much blood on my hands…

I am now Dr. Drail, so it went well! This was back in August, so I am still in recovery mode while I job search.

Here goes:

During my dissertation, I was lookig for information on the emissiom of 172nm scintillation light in mixtures of gaseous Xe and CO2 (95:5% - 98:2%), with results being difficult to come by. I found a collaborator who had tested this at lower CO2 concentrations (0-0.5%), but nothing else, no predictions or generalizable applications. Not knowing the optimal search engine terms or what textbook to look in for rules governing gaseous light emission, I ended up looking in fluorescence chemistry papers (my previous field of study) which had something called the Stern-Volmer relation for different concentrations of quenchant in a fluorescent solution. I figured gas scintillation queching was probably similar to liquid fluorescence quenching, but the standard relation didn’t quite fit below 10% additive.

I dug around more and found a modification of this relation for diffusion-limited quenching of fluorescent solutions (the same limitation imposed in gas mixtures, quenching due to random Brownian collisions) that employed an exponential term, allowing for a smoother curve down to low additive concentrations. This perfectly matched the available data and allowed me to model the predicted behavior. I discussed this with the one member of my committee who was available, an organic chemist (my PI was on vacation, everyone else was sick, and my dissertation defense was in 2 weeks). He said my reasoning and math for using this formula made sense and gave me a thumbs up to include this analysis. When my PI came back from holiday, he asked me why I didn’t use some equation generally used in the field, or even just a generic exponential fit. I was ignorant of his suggestion, but it provided the same general formulation as Stern-Volmer, though Stern-Volmer was more rigorously derived mathematically.

Mixing fields is super cool and can allow a much deeper understanding of the underlying principles, as opposed to limiting yourself to one branch of science. While my PI’s recommendation would have given approximately the same answer, understanding and applying Stern-Volmer allowed me to really dig at the principles at play and generate a more accurate and in-depth model, which I managed to write up and defend at the 11th hour.

The SEM+EDS machine in one of my school’s materials labs ran 98 and there was exactly one thumb drive on campus that was allowed to be used if you wanted to pull data. The lab coordinator had to pull the output file to his computer and email them, but made it sound like the biggest inconvenience in the world if you, ya know, wanted your data.

My goal for the summer was to finish my PhD. I defended on Friday and am now Dr. Drail, so I actually accomplished my summer task for once. I sacrificed all my sleep and sanity to do so, as I was told at the 11th hour to redo a major analysis that made up 1/4 of my dissertation, but I fucking got it done.

Everything should just be in eV. Particle physics natural units are the best.

Not to dunk on word, if I need slightly more flexibility than a native .txt reader, it will do in a pinch. That being said:

Word: Oh, you want a table? Good luck getting your excel sheet to cary everything over properly, and god forbid you change a formula. You want to write it natively in word? Lol no.

Latex: tabularx goes brrrr

Word: Equations? Have fun properly tracking equation numbers and manually formatting your text to center justified every time.

Latex: $ $, \( \), and \begin{equation} go brrrr.

Word: Figures? Hope you anchored everything properly, it would be a shame if your entire document layout got shifted…

Latex: What the fuck is an anchor? top, here, bottom, those are your options. Add an exclamation mark if you’re feeling spicy.

My former colleague and I both decided on the same template for our dissertation, but hers looked wonky with the default margins. Sacrificing that lamb to have slightly tighter margins was worth it, even if the eldritch ramblings keep me awake at night.

I did all my Quantum Field Theory homework in Latex, the professor required it. My classmates would write everything out by hand and then transcribe it, meanwhile my officemate and I could think/write/math in Latex, so we only had to write our homework once. The prof lifted the requirement halfway through the semester after everyone else complained, but I never looked back.

The only thing that prevented a 100% Latex-only semester was the goddam section where we had to draw Wick diagrams. There just wasn’t a reliable way to draw them on my computer, as the Feynman diagram tools stuggled with the nuances of Wick diagrams. I still included the hand-drawn versions as figures in Latex, but it felt like cheating.

I did figure out how to write the Wick’s theorem bracket notation in Latex though (not that I’ll ever need to again), so that made up for it a bit. I wager that I spent more time researching obscure Latex packages than actually solving the problems that semester.

I love Latex so much, I even made a template for generating profesional looking DND item cards for my table that I submitted to overleaf: https://www.overleaf.com/latex/templates/d-and-d-item-card-template/ndfdspmmxnrn

The OP is such a loser. I can’t even imagine spending anywhere close to this much energy just to look so pathetic and weak. If they aren’t a bot, they probably need to thrash out here just to feel like anybody cares about anything they have to say.

My boss read the first chapter I turned in, decided I know what I am doing, gave me some basic feedback, and has completely checked out since then lol.

I am half way done with mine, which means I only have 3/4 left to write, then I will be 90% done.

To be fair to the post, it is describing how to tell people who wear all black apart, not categorizing them goth subtypes. Punk is also not goth.

Neutrello sounds good, but it is actually pretty…

weak

Rimshot, crowd moans

In physics- Like “quart” with a k In the Joyce novel- rhymes with park.

Gell-Mann said it sounds like “quart”, Joyce rhymed it with Park, it is a silly word and the pronunciation is as fluid as you desire.