LHC portal

The "Schedule" link under LHC on the portal page is still hard-coded to point to http://lhc-commissioning.web.cern.ch/lh ... e_v1.4.pdf.

Is there a 2011 schedule to point to?

Current OP VISTARS status says: "Access to P4 and P2 - Access at point 4 for the fire brigade to check a possible flood in the cavern"

Oh noes... hope it's a false alarm.

It's hard to tell from the various articles; is this the first time Beauty+ has been experimentally produced, or just the first for the LHC?

Very cool! That shows the beams passing near each other at about 4mm separation (horizontally in the ATLAS and vertically in CMS) then being aligned concentrically.

So they are passing in the same pipe until steering magnets bring them to IP.

Thanks for the link.

Good diagram.

I don't know, though. Looks like a lot of beam steering going on in this diagram of the IP inside ATLAS: http://lhc-machine-outreach.web.cern.ch ... isions.htm

That was one of the possibilities we discussed, that the beam paths always cross and tweaks to the RF that forms the buckets are responsible for getting them at IP at the same time (or not - when collisions are not desired). But another possibility is that they NEARLY cross, and the paths are magnet...

@kasuha: Yeah, we got that part already.

The question is really about what makes the switch from two separate beams in two separate pipes, to both beams in one pipe on a collision course, then they go off into their respective separate pipes again.

That's the part we don't understand.

Rank non-physicist amateurs here, talking about how the beams go from passing each other on parallel tracks, to intersecting at the IPs, and then continue on into their respective pipes. Where would we find a description of how that is done? The Forum Wiki page for Interaction Point is, uhm... spars...

More emergency dumps, but they seem to take it in stride: Post Mortem Information PM event ID: Fri Mar 26 21:09:33 CET 2010 PM event category: EMERGENCY_DUMP PM event classification: MULTIPLE_SYSTEM_DUMP PM BIS Analysis result: First input change detected: USER_PERMIT: Ch 6(ATLAS_Det): B T -> F on C...

I saw an interesting point made on The Register about that. The previous record collision was two 1.18TeV beams colliding at a total of 2.36TeV. By dumping the 3.5TeV beam into the graphite dump blocks, they achieved a new record 3.5TeV collision! OK, so it's a proton-carbon collision with no detect...

Moives? Is that "movies" in another language, or a typo?

(Link about 75% down in the left frame.)

Just askin'...

Thanks for the link.

Section 23 changed from Green to Blue on Cryo Status. Is that valid indication of something, or a web glitch?

All I have is AdBlock Plus, and I notice the !*@^!#& Microsoft .NET Framework snuck back on with the update.

I'll try it again in Safe Mode (disables all AddOns) before complaining any more.

Thanks for looking.

Well, thank you for the effort. Guess I'm just have a one-off issue here. :think: Edit: Rats, just happened again. This is the Mozilla crash report: Add-ons: {d10d0bf8-f5b5-c8b4-a8b2-2b9879e08c5d}:1.1.3, {CAFEEFAC-0016-0000-0011-ABCDEFFEDCBA}:6.0.11, {CAFEEFAC-0016-0000-0007-ABCDEFFEDCBA}:6.0.07, {C...