PhD

30
Nov
2015

Finally done with the master’s degree!

Today I held the master’s thesis defense, at the old auditorium A at the Niels Bohr Institute. My family was there, and a handful of office mates showed up to see it as well. Despite being pretty nervous about it, it all went really well, and even the question session afterwards probably couldn’t have gone better than it did.

You can see my slides on the master’s thesis page, where there are download links for everything related to the thesis (or just look at the slides directly through this link).

A couple of examples from the slideshow

A couple of examples of slides from the slideshow used during the defense

All over, I’m really happy with how the project turned out, and I’m looking forward to trying to finish an article for publication of some of the results during December and January.

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24
Nov
2015
Master’s thesis handed in – preparing for the defense!

Master’s thesis handed in – preparing for the defense!

I finally managed to hand in my master’s thesis, so I can continue on the remainder of my PhD project! I made a small sub-page on here, just like I did for my bachelor thesis back a few years ago. You can see it here, where you can also see the actual thesis (or just have a look at the thesis directly here).

A couple of example pages from the thesis

A look at a couple of the pages from the thesis

I am now preparing for the defense on Monday November 30, and just printed a couple of abstract-posters to hang in the elevator to tell people about it – those can also be seen on the little thesis sub-page I made (or just directly via this link). I’m mostly just looking forward to having this over with.

One day, I’m going to share the LaTeX class that I made for the thesis, so others can use the layout I made, but for now it’s so messy that I don’t think I want to support people on trying to compile the thing…

Part of the little abstract poster

Part of the little abstract poster that I hung around the office to invite people for the defense

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20
Apr
2015

Way too few updates

It feels like I’ve been updating this blog way too rarely the last couple of years – and that’s also the case for the web site as a whole. The last couple of days I have been procrastinating a bit, and had some fun with re-coding parts of the page, and setting up statistics. Turns out, a lot of the notes collections and old hand-ins get a lot of traffic, and it’s interesting for me to look at statistics for this.

Since the last post, I participated in several workshops, courses, experiments and conferences. Worth mentioning was the ICNS conference in Edinburgh, Scotland, two summers ago (July 2013), and a very exciting experiment at IN12 (ILL, France) the same month.

I finished all my teaching responsibilities, after having been a course instructor in the Experimental Physics course three times (although the first time was before I started my PhD) and once in the Neutron Scattering course, plus a couple of smaller things at different summer schools. I’m also almost done with taking courses, since I participated in a large number of workshops during the first part of my studies. I’ve had over a year long hiatus from my studies due to personal issues, and am currently working on getting back, by finishing my master thesis so I can continue on the PhD plan I started back in March 2012. Hopefully this will be over with in the beginning of this summer.

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22
Jan
2013

We just got an article in Neutron News!

This is my first scientific publication apart from my notes collection! Even though I’m not the first-author (Linda Udby did the writing), it’s still super cool! I made all of the figures, and we actually got the front page of the journal for that volume – which of course I also made!

Our Neutron News front page

Our Neutron News front page

You can see the publication via the DOI link: http://www.tandfonline.com/doi/abs/10.1080/10448632.2013.751795

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12
Dec
2012

My first ISIS beamtime

During the last six days, I’ve been in England, more specifically the Rutherford Appleton Laboratory in Oxfordshire, to do measurements on one of our LCO+O crystals (actually the same crystal that we did measurements on at DMC in Switzerland last month). I was at the SXD instrument, a time-of-flight neutron Laue diffractometer, where we measured at five different rotations of the crystal, each for both low temperature and room temperature.

We got a huge amount of data, and mapped out a large volume in reciprocal space. The number of superstructures we saw was really large, and so far we haven’t been able to get a full refinement of the data. The on-site peak integration software was really cool though, and seemed to do the job great – and the instrument scientist was extremely helpful.

All in all, a great experience, and I hope that I (probably with the help of the instrument scientist) will be able to get the superstructures solved.

Of course I also had a few minutes here and there to walk around and take some pictures:
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18
Nov
2012
Yet another beam time, now with students!

Yet another beam time, now with students!

I just got home from Switzerland, once again, this time from a beamtime at the DMC powder diffractometer, where I was measuring on one of our LCO+O single crystal samples, in order to map out part of reciprocal space (both for the crystal aligned in the cb- and the ab-plane). It was some really cool measurements, and I think I’ve already found the front page image for my thesis!

I actually started out the trip with starting up a beam time at the RITA-II instrument, where a YMnO3 sample were to be investigated. That was also really exciting – and that experiment continued during my own DMC beam time as well (sadly I didn’t have time to follow it all the way though, but their results looked really cool!).

Some of the students from the neutron scattering course were down there with us, to follow the two experiments. That was really fun, but I hadn’t expected how hard it was to help them to understand everything, when I didn’t even understand half of it myself! Usually beam times are really tiring, but this really took the price!

The DMC data weren’t really the most perfect data to do structure refinement from (in the cb-plane we only got 12 structural peaks, and some of them were of really bad resolution), but we saw some cool temperature dependencies, and already have some new proposals out for TriCS and other instruments in order to explore those things more. We also got a friendly beam time of two days at the new EIGER instrument, which will be really cool to work with.

This trip also marked the end of the neutron course, although I still need to correct a few reports, and help a few more of the students with their final project. But all in all, it’s been fun teaching in the course, even though it has been quite hard at some times!

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23
Oct
2012
Total scattering workshop in Santa Fe

Total scattering workshop in Santa Fe

From October 14th to 23rd, I was in the states for the first time. I went to Santa Fe (New Mexico) to attend a workshop/conference on total scattering, the Advanced Simulation Techniques for Total Scattering Data conference, arranged by people from Los Alamos National Laboratory, and Oak Ridge National Laboratory.

The actual conference was only from the 16th to the 19th, so I had a few days on each side to go around town and be a bit of a turist. I brought my camera, and got a lot of nice shots (although I’ll have to find the time to actually do the editing and sorting of them later).

My flight there went through Heathrow and Dallas Fort Worth, and turned out to end in a mess – both ways. On the way over there, some very thick fog had hidden Heathrow, and we had to fly in circles – eventually landing in Stanstead to get re-fueled, before we could finally land – more than an hour late – in Heathrow. Of course I missed my Atlantic flight, but luckily I got on the next available one, and still caught my connecting flight in Dallas. My luggage wasn’t as lucky, though.. The people in Dallas were really bad at handling the situation, and it was first when I landed in Santa Fe that people could help me on with the luggage problem (at which time it was too late to send the luggage on from Heathrow, so I had to wait to the evening after). On the way back, our landing in Heathrow got delayed because of the number of planes waiting, and I nearly missed my connecting flight to Copenhagen. The people at Heathrow were nice enough to hand out special orange tickets for people connecting with flights that left soon, but they didn’t take into account that the name ‘Jensen’ is very common in Denmark, and hence stupidly enough only made one ‘Jensen’ ticket, and gave that one to the other ‘Jensen’ Dane that was going on the same plane. So I had to go through the normal procedures, and just caught the plane in time. Of course, my luggage didn’t, again. But oh well, at least I got home.

The conference itself was really nice – both the practical arrangements, the small PDFgui tutorial, the talks, and the trip to Los Alamos, were really well planned and executed. I learned a lot of new information about total scattering, and what it can be used for, and met a lot of cool people. I was really happy to talk to a couple of people from ORNL, to hear how things work over there, since I will be going there in half a year of so.

The turisting part of the trip went nicely as well – I had some fun walking around town, looking at the old buildings and just getting a feel of things. I went to a local supermarket just to see how it was (I was expecting the people packing your groceries for you, but it still just felt creepy to me..), and I went to lots of small restaurants to get some of the New Mexican food (which I was pleasantly surprised about), especially the chile. I even went all the way through town to see the farmers market, and I’m glad I did; You could get to see how they roast the peppers for the chile – that was fun.

Overall, it was a great trip, and I’m really looking forward to going over there again.

A while later, a meeting report was published for the workshop in Neutron News, which can be viewed here. The picture in the top of this blog entry is also from this report.

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26
Sep
2012

Responsible Conduct of Research course

These last two days, I’ve spent my mornings at the old faculty of life sciences, following the new mandatory PhD course Responsible Conduct of Research. The course was started because of the problems with the neuro-science (or what was it?) researcher Milena Penkowa, who did a lot of bad things (read; science misconduct). I don’t know exactly what the logic was, but I think the people at the top of the university thought it would make them look good if they demanded all PhD students to follow a course on the matters of misconduct and politics.

First, I was appaled by the sheer weight of the papers they wanted us to read: Not only news-paper clips and guides, but huge pieces of law texts. I haven’t had that much trouble getting through a curriculum since following the (also mandatory, but on the bachelor education in physics) course in science ethics and history/theory. I guess I learned a bit though – I now know what the different committees are called, and what they do, and I learned about a couple of cases where people have done wrong. But all in all, most of what they made me read what logics, and I felt a bit stupid for actually following their demands of reading it – I might as well just have thought it up myself.

The lectures on the two mornings were fine, though, but maybe (who am I kidding, not maybe, definetely!) boring. At least we got free coffee…

To pass the course, you have to write a two-page essay on a case from your own scientific environment or work, related to the curriculum of the course. I haven’t written an essay since high school, and I’ve always hated it. For now, I have no idea what I want to write about, and I really don’t know how I’ll be able to write something I’ll be happy about handing in. Let’s see what I end up with…

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17
Sep
2012

One more workshop on the list – this time on DISCUS

During the full last week, I was in Erlangen (Germany, close to Nürnberg), following a workshop on the diffuse scattering simulation program DISCUS.

It was lots of fun, but I had kind of hoped for something else. A lot of the first day (and sub-sequent days) were used on how to use linux and the terminal (and ranting about how bad windows is – that is, using bad and wrong arguments for it…), instead of introducing the program in a good way. We went through a lot of different tutorials, but a lot of it was very hurried, and not very deep. I guess that at least I got a lot of tools back home with me, so if I really need to use the program (I don’t know if I will, yet), I have something to read up on.

I did buy the DISCUS cook book beforehand, and read a little in it (I didn’t get that far because of me being really busy). I must say that it was a really expensive book, due to the fact that you can only get it i hard-cover, but it is well written – and I think I’ve learned far more from that short period of reading in it, than I did from the actual workshop.

All that said, I would probably recommend people going to the workshop if they actually intend to use the program themselves. It’s really hard figuring out the small logic things on your own – like the fact that they have three different independent programs in the package.

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06
Sep
2012

Started teaching in the neutron scattering course

This week was the first week of block 1, and hence the first week of the neutron scattering course held at the Niels Bohr Institute. I was helping a bit last year as well, since I was hired to develop some different e-learning tools for the course, but this year I am an actual student instructor on the course.

We started Monday afternoon with some small introductions and a few exercises, and the small team (this year I think there are only about 12 students following the course…) is kind of cozy. Wednesday was the first long day, and since Kim went to Switzerland, Linda and I (and Peter Willendrup, who had promised to help with giving an introduction to McStas and the virtual machines we wanted to install on the student’s laptops, was also there) handled the day. Linda took care of lecturing about instrumentation, while I did a small MATLAB introduction and a little view of our local neutron source and He-3 detector tube. Most of the students seemed to get things running, and I think they’re ready for the startup of the real simulation projects in next week.

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17
Aug
2012

Teaching at a neutron and X-ray scattering summer course

These last couple of days (that is, Monday through Wednesday), I’ve been one of the teachers of the Applications of X-ray and Neutron Scattering in Biology, Chemistry and Physics course held as a collaboration between the University of Copenhagen, the University of Lund, the University of Roskilde, and DTU. It’s a three week course, and this is the first time for the course to be held.

The idea was to teach fairly young university students the basics of both neutron and X-ray scattering, in order for them to be prepared for the great new times with the ESS and MaxLab IV.

These first three days, where I was teaching, consisted primarily of introductions, and Monday and Tuesday I was teaching in split-sessions. These sessions were a split-up of the students in biologists and physicists (or, in practice, people not usually using a lot of math, and people better at math). The physicists were taught something about proteins, while Kim Lefmann and I were teaching the others to do some basic math, and understand things like complex numbers, Fourier transformations, waves and simple scattering. All in all, I think it went okay. But I guess I would have liked to be better prepared (I only found out that I was going to be teaching at Sunday evening…).

On Wednesday, I helped three of the lecturers with exercises. The last two weeks I have been working on a simulation of a simple neutron reflectometer instrument, to be used this single day. I never got the multilayers working flawlessly, but I got the rest working okay, and offered to help the three others to do the actual teaching, using the live-simulation tools that we also used during the tutorials that I was helping in on i Italy in July. This ended up kind of a mess, but I hope that the students learned something anyway…

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27
Jul
2012
OrientExpress beamtime over

OrientExpress beamtime over

I’ve just returned from the Institute Laue-Langevin (ILL) in Grenoble, France, where I’ve been on a super-short beamtime at the neutron Laue instrument OrientExpress. This was my first time to the ILL, and I was going there on my own. That was confusing! The airport in Lyon has really bad signing, but I found my way (after a while of wandering around not understanding anything, I might add..).

I was measuring on two new LSCO crystals, to see how many single crystals was in them. Both of them actually came from one crystal, but it broke into two during the oxygenation process. It seems like they are possibly full single crystals, a great result, but they might have a splitting in the length direction (they are cylindrical) – which is kind of a mess to cut up. I guess I will have to do some X-ray Laue images to see if that is the case.

The absolutely stunning rail station at Lyon-Saint Exupéry Airport

On the way back home, I went to the airport in Lyon a little early, to go explore the train station connected to the airport. I have never seen a more alien building – it’s absolutely stunning!
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22
Jul
2012
Home from teaching in Italy

Home from teaching in Italy

The last week (from the 15th to today, the 22nd) I have been participating in the International Neutron Scattering Instrumentation School (INSIS), partly as a teacher, and partly as a normal student. This was all happening in the small town Frascati, on a mountain close to Rome, Italy.

I was teaching the students about McStas during two afternoon tutorial sessions, where Linda Udby, Peter Willendrup, and I strolled around helping the students getting through the exercises we made for them. For the rest of the school, I followed the lectures – learning a lot of new words from the neutron scattering world (even though some of the lectures were kind of a repetition of what I already knew), and I met a lot of cool people. I really had fun during the evenings, talking to a lot of great people from the neutron scattering world.

We also got a tour of the particle accelerator at the Laboratori Nazionali di Frascati, which was absolutely awesome!

A little trip to Rome

I did take a single day off, though, to go down to Rome and play turist. I went downthere awfully early in the morning, to have time to see things and walk around without dying in the heat. I was one of the first people of that day to get into the Colloseum – that was really cool. I also saw the pyramid of Cestius, the Trevi fountain, and the forums.

All in all I had a great trip – but I would recommend people that are not very heat-tolerant to not go there in the middle of the summer!

A while later, a meeting report was published for the school in Neutron News, which can be viewed here.

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29
Jun
2012
Another workshop

Another workshop

This whole week I have been participating in the Second Annual Niels Bohr International Academy Workshop on ESS Science (yeah, that’s a long name, I know) held here at the Niels Bohr Institute.

During the lectures, we were told a lot about current neutron instruments, and the programming used to analyze data. I also participated in tutorial sessions in the program RMCProfile, and I was really happy to get to know that particular program. I might use it during my Ph.D., if I get the time (and beam time!).

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22
Jun
2012

Experimental Physics exams, finally over!

Today and yesterday we had the final exams of the Experimental Physics course. The students used the last couple of weeks on doing experiments around in the actual research groups at the Niels Bohr Institute. These experiments were then documented in small 4-page articles (PRL style), and the final exam was then individual oral presentations of their projects, using slides. The idea was to make it small konferences, and the students were split up into different teams where they held the presentations for each other (as well as the teachers, being there both as chairmen and examinators).

It went really well for most of the students, and it seems like they’ve learned at lot during the course. I feel like the course has been a success again this year – although I haven’t looked at the student evaluations yet..

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