Search found 19 matches

by PsaltyDS
Wed Feb 16, 2011 10:48 pm
Forum: Portal link and forum suggestions
Topic: Is there a 2011 schedule to point to?
Replies: 1
Views: 1993

Is there a 2011 schedule to point to?

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?

:?:
by PsaltyDS
Tue Nov 16, 2010 3:11 pm
Forum: The Accelerator
Topic: Current Events Discussion
Replies: 512
Views: 81979

Possible flooding in cavern at P4?!

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.
by PsaltyDS
Fri Apr 23, 2010 6:54 pm
Forum: LHCb
Topic: El Reg LHCb story
Replies: 11
Views: 9739

Re: El Reg LHCb story

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?
by PsaltyDS
Wed Mar 31, 2010 12:26 am
Forum: The Accelerator
Topic: Where is a good "IP For Dummies" description?
Replies: 10
Views: 2393

Re: Where is a good "IP For Dummies" description?

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.

:D
by PsaltyDS
Tue Mar 30, 2010 8:54 pm
Forum: The Accelerator
Topic: Where is a good "IP For Dummies" description?
Replies: 10
Views: 2393

Re: Where is a good "IP For Dummies" description?

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

:think:
by PsaltyDS
Tue Mar 30, 2010 4:33 pm
Forum: The Accelerator
Topic: Where is a good "IP For Dummies" description?
Replies: 10
Views: 2393

Re: Where is a good "IP For Dummies" description?

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...
by PsaltyDS
Tue Mar 30, 2010 2:08 pm
Forum: The Accelerator
Topic: Where is a good "IP For Dummies" description?
Replies: 10
Views: 2393

Re: Where is a good "IP For Dummies" description?

@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.

:think:
by PsaltyDS
Mon Mar 29, 2010 9:16 pm
Forum: The Accelerator
Topic: Where is a good "IP For Dummies" description?
Replies: 10
Views: 2393

Where is a good "IP For Dummies" description?

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...
by PsaltyDS
Fri Mar 26, 2010 8:48 pm
Forum: The Accelerator
Topic: Current Events Discussion
Replies: 512
Views: 81979

2010 Briefings, Schedules and Problems

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...
by PsaltyDS
Fri Mar 19, 2010 6:13 pm
Forum: The Accelerator
Topic: Older Events and discussion 3/22/10
Replies: 156
Views: 25657

Re: ** Current Events and discussion **

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...
by PsaltyDS
Wed Mar 17, 2010 9:37 pm
Forum: Portal link and forum suggestions
Topic: Moives?
Replies: 2
Views: 1286

Moives?

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

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

Just askin'...

:-)
by PsaltyDS
Thu Mar 04, 2010 10:28 pm
Forum: The Accelerator
Topic: Blue Cryo Status?
Replies: 4
Views: 1450

Re: Blue Cryo Status?

Thanks for the link.

:-)
by PsaltyDS
Thu Mar 04, 2010 9:52 pm
Forum: The Accelerator
Topic: Blue Cryo Status?
Replies: 4
Views: 1450

Blue Cryo Status?

Section 23 changed from Green to Blue on Cryo Status. Is that valid indication of something, or a web glitch?
by PsaltyDS
Thu Mar 04, 2010 9:43 pm
Forum: Portal link and forum suggestions
Topic: Issues with Firefox 3.6?
Replies: 7
Views: 2549

Re: Issues with Firefox 3.6?

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.
by PsaltyDS
Wed Mar 03, 2010 6:23 pm
Forum: Portal link and forum suggestions
Topic: Issues with Firefox 3.6?
Replies: 7
Views: 2549

Re: Issues with Firefox 3.6?

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...