Bits and pieces

Arranged six month chat...

Went to Mill Hill

Got back late

...more and more and more...

Another run ended

Saturn1000 was the 12eV GS1m run. It has been analysed.

Demonstrating also happened, 2 hours of waves optics and accoustics in the maths problem class. That is now over and done with eternally. No more problem classes!!!!!!!!!

Anasuya sent another problem paper through alan, proving some things never end. Not alan...

Mill Hill

Another clear night with observations of Saturn, a double star and some cluster or other.

One run finished overnight and was analysed. Saturn12 was the 12eV 0.9 BSR run, which finished. An email from IS states that further restrictions are now in effect around Keter, so any of these runs that fail have simply failed for good.

More marking

Delivered hot off the press. Raman stuff. Anasuya's marking now done and handed back.

Problem class, penultimate one, also done today

Back to it

Meetings to do with seminar feedback today. Very positive.

Finished off Raman marking, then got some papers off Howarth, including one of the last lot, which has been dealt with, also saw anasuya about her marking, which needs swiftly shifting.

Problem class.

One run finished. Saturn500 finished the 40eV SD-1 run, was analysed recoded as 12eV SD-2 and reset off. This was the penultimate 40eV run remaining and means only two non 12eV runs remain to be completed. Also, only one of the SD 12eV slots is yet to be set off.

Bits, pieces (and that's just me)

First thing was dropping off the poster at the graduate school poster competition, under Alan's orders

Then marked half the remaining scripts, as well as correcting the already marked scripts for an error in the model answers...

Seminar finesed and transfered to a laptop for presentation

Emails sent to arrange cover for my extra demonstation session from Mill Hill

Seminar performed

Looong night at Mill Hill, with observations of...

The International Space Station (naked eye)
The Orion Nebula (Fry, Radcliffe, plus CCD on Meade)
The Moon (Fry, Radcliffe)
Saturn (Radcliffe)
Cloud (naked eye, Fry, Radcliffe, Meade)

...enclosing an additional hour of work. So, marking left for tomorrow

Stuff to do

Demonstrating in problem class done (special relativity...)

Marking for physics of the solar system next

More stuff

One run finished overnight:

Saturn50 50eV SD-1. This was analysed, recoded as 12eV SD-1 and set off again. No grade changes.

Mill Hill

Grrr

Marking

Problem class

Marking

Mill Hill

Marking

Not much today

Problem class done

Marking for Raman's course now begins in earnest... ok, in this room, but either way...

More on x-rays

Well, photons. The Klein-Nisch formula gives compton (x-rays) and Thompson (lower energy than x-rays) cross-sections for scattering off electrons. Data can also be found for absorption, ionisation, dissociation, Rayleigh/Mie (visible scattering off dust) and Raman (absorption, plus re-emission at another wavelength). This is all photons do. Well, in my model it will be... Plus need to establish the effect of the Sun being an extended source, and see if I can get my photons to curve...

Need differential pdfs from each type of scattering plus total cross-sections.

One run has finished so far. 40eV completed its SD+2 run, was analysed, recoded and set off again without grade changes.

Ok, after a bit of research, it probably won't matter (ok, certainly won't matter) if I keep the backscatter ratio at 0.5 as that is what it is below about 0.2MeV (far more energetic than 1nm). There isn't anything to worry about so far as energy transfer after all, so just need to put compton scattering total cross-section (which I have) into the program as a normal, scattering (incoherent) cross-section. Then, absorption, dissociation and ionisation ones go in as normal. Rayleigh/Mie can't be used as there's no dust in the models, so that just leaves Raman, which has already been stuck in there. Thompson is implictly included through the Compton computation as mentioned above. Ok, I'm ready to rock...

Have scraped together a load of cross-sections for a 1nm grid of x-ray fluxes. Need a few molecular ones, but have compton ones, plus a few photoionisation and absorption ones for elements - enough, at least, to interpolate the rest from.

Have also had another cloudy day at Mill Hill. 100% cloud cover at least...

H3+ profile has come through from Makenzie.

More and more and more...

Another block of maths demonstrating out of the way.

One run has finished. Saturn1000 slot 100keV GS1m run. Analysis was as expected. Recoded as GS10 version of same energy and set off again. Have decided to kill off all the fast runs asap rather than do them concurrently with the slow runs, then do all the slow runs in one big block - asides from those currently being done and their heirs...

Not that any 'fast' runs are left asides fro the 100keV ones. All medium to slow.

Also had a quick look at Makenzie's newly produced profiles. She hasn't produced the further out ones, which are the important ones yet, so will wait until tomorrow for discussions. Or later. Who knows...

...one last thing. References for Martian cross-sections kept from Europlanet, this list I will be going through for obvious reasons:
Straub et al 1996 - already got
Lindsay et al 2000 - now got
Manyan et al 2000 - ah, ManGan et al... ahem, now got...
Deutsch et al 2002 - now got
Haider et al 1992 (modelling) - JGR, dammit!
Erdman and Zopt 1983 (cameron band?) - ZIPF, what sort of a name is that? Far prefer Zopt... Anyway, not included in UCL's subscription to Planetary and space science, so no-go despite importance...
Fox and Dalgarno 1979 - JGR - though did get hold of three 1979 papers by Dalgarno relating to proton processes I was in dire need of for DICE...
Lummerzhien and Lilensten 1994 - Lummerzheim, given I own half his back catalogue, it sometimes seems, I should know how to spell his name... plus annales has withdrawn the PDF! Did they know I wanted it?
Tran and Vidal 1998 - TIan... now got, oh!, there's another, got it too. Waaaaait. A third useful Tian and Vidal 1998 has appeared with cross-sections, my they had a busy year - nope, here's number four, maybe Tian and Vidal 1998 is a generic reference to their entire career...
Torr and Torr 1985 (Photon)
Avalgan et al 1998 (Photon)
Hitchcock et al 1980 (Photon)
Masuoka 1994 (Photon)

Will deal with the photon stuff another time. Mostly have them, but no real prospect of a photon thing to deal with yet as Tommi is otherwise engaged.

I make no garrentees that any of those names are spelt correctly, or in any way resemble the correct spellings.

Couple of runs

Much of the day has been taken up with Mill Hill and taking up Outreach leaflets to the observatory, but beforehand two runs did finish, the analysis of which was kept until afterwards.

The first was Saturn1000 finishing off the 1keV GS runs with GS1m. This was recorded and then recoded as 100keV GS1m run and set off. Later analysis was as expected. No grade changes.

The second was Saturn12000, doing a 1keV SD run (SD+1). This was recorded, recoded as SD+C and set off, making it the penultimate 1keV run. Analysis as expected. SD grade changes to a first. It is 70% done, GS is more than 80% done and BSR is 90% done. Overall, just over 80% done.

A bit done

Problem class has taken up a couple of hours. Demonstrating mathematics with a half written answer sheet. How I love UCL...

The Thesis has also had a bit of attention. History of observations of the aurora, just the timeline, individual bits on particular observations to go in later. I knew that long winded talk I did last year would come in handy at some point...

Saturn500 finished the 40eV GS100m run. This is the last of the 40eV GS runs not being dealt with, so moved it onto the SD runs. 40eV might actually get finished! Analysis of the run complete, no grade changes, but 80% of GS runs now complete, along with 90% BSR runs, 65.7... etc % SD runs and 78.5... etc % of total runs.