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Posts Tagged ‘conference’

It’s kind of mind-bending how fast things are ramping up, but no-one knows when “it” will happen, and how “it” will go — “it” being the initial collisions and the data analysis to follow. You get the same sense from everyone you talk to about the LHC, and especially from the younger people i know (students and postdocs) whose, well, *lives* depend on things getting going soon. I remember this feeling well, just as RHIC was starting — although things felt smaller in those days, or at least my 50-person experiment did.

This week is a Physics and Performance Workshop concerned with how ATLAS will deal with early data. I have a particular interest in this from the standpoint of a guy interested in heavy ions since this is precisely the data we will use to compare with lead-lead collisions when they eventually arrive. And yet, the last few months finishing up our proposal (more on that later, i’m serious) have shielded me from the outrageous amount of work going into so many different aspects of the detector and analysis. I’m scrambling to catch up long-distance, from my office, reading slides, and keeping up with emails, and we even have a heavy ion videoconference tomorrow (for which I’m assembling a talk now…). But there’s a lot to keep up with, and then I still have to get ready for the big ATLAS week in July! (and let’s not mention we have a short Alpine vacation to plan as well…)

On the Volga

Friday, May 23rd, 2008

For all the non-blogging I’ve been doing, I can’t say that I haven’t been giving most of my life to the upcoming LHC run. The main distraction was a recent trip to an ATLAS workshop in Dubna, Russia, on the Volga River, next to a huge reservoir (which someone there called the “Moscow Sea”). While I’ve heard of Dubna for years, as I’ve had collaborators on previous experiments hailing from there, I had never been there, much less to Russia in general. Can’t say that anymore.

The workshop (“Heavy Ion Physics with the ATLAS Detector”) was early last week, and took place in a conference center on Veksler Street, well outside the lab itself. It turns out that just as it’s getting harder and harder to get our non-US colleagues into our national labs, it’s getting equally as laborious to get us into foreign labs. So while I didn’t get to see their facilities, we did hear a nice talk about their planned new low energy heavy ion collider facility (NICA). And the workshop participants (half local, half international) presented a nice set of talks both on ATLAS capabilities for heavy ion physics, but also on Russian involvement the other heavy ion efforts at the LHC in CMS & ALICE. My talk, on bulk observables at RHIC, can be found here — for your enjoyment.

Finally, when the workshop was over we took a half day trip to Sergiyev Posad, home of the Troitse-Sergiyeva Lavra monatery — the spiritual center of the Russian Orthodox Church. Fascinating — especially the private tour of their collection of icons.

And if you’re really curious, you can check out my photos of the Dubna & Sergei Posad parts of my journey on my flickr page. I also spent a day in Moscow on either end, and that was amazing as well — more on that on my personal page.

Make no little plans?

Friday, May 16th, 2008

This week, US CMS held a “run-plan” workshop at Fermilab. The goal of the workshop was to really get a grip on what needs to be done when the LHC starts running and CMS starts taking data. Did we meet this goal? Do we actually have a plan now? Well, at the very least we have a better picture of what’s going on, and for someone like myself, who sits in Nebraska and spends most of his time thinking about computing, it is helpful to get the broader view. Here’s a sampler of some of the things going on:

  • As you can read from some of the other posts on this site, there is a tremendous amount of work going on with the detector. We recently completed several days of data-taking with as much of the detector as we can, but with no beam (of course!) and no magnetic field. Even that is a huge effort; getting all these pieces of the detector working at once is quite complicated. And this is not just an operational exercise — the data that were recorded are potentially quite useful. Yes, we recorded a whole lot of nothing, but if you analyze that, you ought to observe…nothing. If instead you see something, then there is some detector effect going on that can contaminate beam-collision data, such that you would see something when you ought to see nothing. And when you are looking for new physics, and you don’t quite know what it’s going to look like, then nothing that looks like something is going to be a lot of trouble. One thing we hope to do is superimpose these “empty” events on top of simulations of “real” events, and see how badly our simulations degrade as a result.
  • I spent most of my time in a working group focusing on computing issues. The most interesting presentation we had was from a student who has been busy using the computing system for several months. He of course has found ways to get his work done most efficiently…which were not necessarily the ways we imagined people using the system! It was great to what he and others find to be the most difficult things to do; we came up with some ideas for improvements that can be made. On balance, though, the system is working pretty well, even if we still have further to go.
  • No one said that they had too many people working on a project. Everything still needs more effort. It’s encouraging in that any help that is offered will be welcomed.

I gave a couple of presentations at the workshop, one on what tasks have calls on the resources of Tier-2 centers, and one on some of the issues we need to think about in analyses involving leptons plus jets in the final state. These went well enough. More importantly, by coming to the workshop I had a chance to see some of my friends and colleagues face to face. Video conferencing is OK, but you can learn a lot by chatting in the cafeteria. There are some physics things that I really do want to get going on, especially now that the summer is here, and I spoke to a few far-flung collaborators who want to launch similar efforts. We all agreed to phone and email and so forth. One colleague emphasized to me that we must really seize the day now. I knew this already, but it was reinforced — the next few years will be a unique time in my entire scientific career, which still has a few decades to go, so I should make the most of it.

The title of this posting comes from Daniel Burnham, who was the principal planner for the layout of the city of Chicago, one of our great American cities; he believed that every resident should be within walking distance of a park, and decreed that the lakefront should always be free and accessible to the public. “Make no little plans,” he said, “They have no magic to stir men’s blood and probably will not themselves be realized.” It worked out well for Chicago; let’s make it the same for the LHC.

Ends of the Earth

Friday, February 15th, 2008

Whew, it’s been a busy couple of weeks moving between what feel like two ends of the Earth: a week in Jaipur, India attending Quark Matter 2008, the “big” conference in Heavy Ion Physics (where I’m coming from), and a week at CERN (from where I write) at ATLAS week. Not that I didn’t consider blogging during these hectic days, but as I’ve mentioned before: Life + Blogging = const, and although it looks like we’re doing nothing but sitting around in meetings, talks, etc. all the day long, we’re also doing lots of important things in the quiet, like reading the Times and writing emails. OK, we’re also learning, plotting, strategizing, thinking — and listening. It’s really that pesky listening thing that gets in the way of constant, or even occasional, blogging.

Anyway so here we are, wrapping up two intense meetings (and getting ready for a couple of well-earned days in the Swiss Alps). Quark Matter was a nice time, even if I showed up 3 days late (only 2 of them by design, the third due to a fog bank in Delhi on Wednesday morning, and a little “mix-up” about my hotel reservation in Jaipur). Lots of interesting, if disparate, results and some excellent wandering around Jaipur and environs, and a fantastic banquet. For some record of this, have a look at my Flickr set. There are conference shots, Jaipur shots, and a lot of stuff taken by me hanging out the bus window.

ATLAS week was hectic as usual, with the usual 9-6 meeting schedule (plenaries, parallels, and impromptu). Things are really heating up here, something which I probably perceive more dramatically than my other colleagues on this blog since I have been at CERN so infrequently recently (something which should be changing, I hope!) The CERN cafeteria is simply buzzing these days, at all hours, with orders of magnitude more young physicsts than I ever saw in my old days here as a student. And it really seems like TV crews are crawling the place, although I only see them following people around as they eat lunch, which I hope isn’t the bulk of the footage. Anticipations — and tensions — are running high, mainly for the p+p program (the heart of the matter) and also for the heavy ion program, which is progressing more and more rapidly by the week.

Anyway, back to the listening thing. I should get to my Quark Matter rundown (especially the various LHC showdowns) soon.