Nuclear experiments

The last 4 days I have been doing neutron diffraction experiments at Australian Nuclear Science and Technology Organisation (ANSTO). It has been quite an experience, a very cool one actually. I have been wearing a portable radiation dose monitor, taking almost hourly full body radiation scans every day and operating a neutron beam. However, so far it looks that the most dangerous thing about this place is not the radiation but an aggressive bird who decided to nest in front of the main entrance. Some of the scientists have already suffered terrible attacks.

Check out the live broadcast from my experiment (available for the next 24 h) – http://www.nbi.ansto.gov.au/wombat/status/#. We are measuring the rates of the mineral reaction where KBr crystal is replaced by KCl. The ultimate goal is to check if this reaction is faster for deformed crystals. 

The diffraction peak for my KBr sample is around the unit 230 on the x-axis. The peak of KCl is just a little bit on the right side from the KBr peak. During the experiment, the signal of KBr becomes weaker but the signal of KCl intensifies due to the growth of KCl.

If you do not see the peaks, I am either changing the sample or obtaining terrible data. 

PhD life: last week’s highlights

This is a new project which I decided to experiment a bit with in this blog. The rule is to take one picture every day of something from my daily activities to show my non-academic friends what the hell I really do at University all the time.

Last week was actually quite busy. I am working on finishing my first paper, hopefully till the end of the year, doing experiments with salt crystals in a high temperature oven, shopping minerals for other set of experiments and on top of all that I got in a  bicycle accident on my way to Uni.

It is actually a funny story how the accident happened because it was caused by a bicycle helmet. There is a law in Australia that every cyclist has to wear a helmet, which I find ridiculous and do not want to comply with.  So I rode without the helmet the whole last year until 2 weeks ago got stopped by a police and almost fined. Since then I started to wear it on the main roads and took it off on quite streets. So on Thursday I was peacefully driving to the Uni with this bloody annoying thing on my head. Then near the campus area I started to take it off. While doing this the only option was to hold the steering wheel with the left hand. The bike was going down the hill. The front wheel started to turn. I lost control. Hit the kerb of the sidewalk. Fall. Then – blood, blackout, ambulance, etc… All of this only because of a helmet : ) Anyway I am fine now. Some pretty deep scratches but nothing that can not heal.  

Middle crust challenge

The conference I mentioned earlier went pretty well. It was a small one, just for PhD students at our department but also a great opportunity to meet some numerical modellers from our centre and hear their perspective on my project.

The field study I work on is about the rock deformation in the Earth’s middle crust. Middle crust is an important rheological layer which has been quite challenging to describe numerically. While we have good approximations on the rock strength in the upper and lower crust, there are no generally accepted models for the middle crust. It is mainly due to the very complicated interaction between mechanical and chemical processes at these depths which results in a fluctuating strength of the rock.

However, I think  it is possible to identify and to a certain degree quantify the processes in middle crust using data from field studies and experiments. The question is if we have numerical tools, powerful enough to model them. And it actually looks quite promising. At this very moment my genious housemate  and colleague (let’s call him Benat)  is working on an advanced numerical code which could allow to solve this. Let’s see see what we can do.

Check out my mindblowing talk:

To do list of a PhD student

- prepare a mindblowing talk for a conference (due in – 2 days);

– make a scientific poster on a project you have no data on (due in 1 day);

– (tomorrow) do some test experiments for the poster to hide the fact that you do not really have data;

– hunt for gem quality perfect crystals (to use for deformation-reaction experiments). This includes calling people in Mexico, stealing from teaching collections and getting in touch with Latvian mafia in Australia (this and next week);

– prepare for an intelligent conversation with a great scientist who is coming to give a talk on a relevant topic by reading 5 of his papers (today);

–  design an experimental apparatus (last week);

– make daily visits to the workshop which is constructing the apparatus until they can not bear the annoyment and finish it faster (following week);

– destroy some of your perfect crystals with the designed apparatus (following week);

– crush some alumina for high temperature-pressure experiments (following week);

– go back to the Stone Age [pun intended] and do hand-polishing of experimental samples, so they get finished sooner (following week);

– do geochemical and textural analysis on the polished samples (in 2 weeks);

– learn how to do chemical mass balance reactions for the paper in writing (following week);

– write a scientific paper (next 2 weeks);

– save the world.

Who needs a life if you have a PhD?

a) design for the experimental apparatus we will use for salt deformation – achieves stresses of 8 bar (idea by S. Piazolo); b) KBr single crystals for the deformation-reaction experiments

A Saturday afternoon

It’s good to have friends who keep a professional rock saw on their balcony. Fills up my weekends when the lab is closed.

A meteorite week

Besides of my PhD studies I currently have a small tutoring load in an intro geology course for undergraduates. Last week it was all about meteorites. We simulated meteorite impacts and demonstrated fragments of different kinds of meteorites. This was the coolest sample in our collection:

Pallasite. Very rare. Very beautiful. And very expensive.

These kinds of meteorites make up only about 1% of all the meteorite finds. They supposedly come from the core-mantle transition zone of outer space bodies. The green crystals are olivine embedded in a metallic iron-nickel matrix.

(+ one more thing on my “to buy list” after becoming rich – a pallasite necklace).

Every cloud has a silver lining

A meeting with my supervisor after the “unfortunate discovery” (see below):

– “Hmm…ehemm…, so, what exactly I am going to do during the New Zealand’s fieldwork?”
– “Shopping!”