Search found 78 matches

by josch222
Thu Dec 17, 2009 10:50 pm
Forum: Quantum Philosophy
Topic: False Vacuum
Replies: 38
Views: 17100

Re: False Vacuum

Particles in LHC are way less energetic than many other particles in the universe. The only difference is that in LHC scientists are watching the outcome with sophisticated equipment. (...) And exactly this difference is important. Since quantum theory, we know that observation makes a difference t...
by josch222
Thu Dec 17, 2009 2:08 pm
Forum: The Accelerator
Topic: LHC Shutdown schedule
Replies: 30
Views: 7491

Re: LHC Shutdown schedule

Well the whole LHC seems to be warming up I think most likely because they've turned the power off to the cryogenics. Oh yes, now I see, but that wasn't the case a few hours ago, then I saw only the mentioned "groups" and LSSs going up. I thougt they would keep the cryo for the others. I wonder wha...
by josch222
Thu Dec 17, 2009 12:53 pm
Forum: The Accelerator
Topic: LHC Shutdown schedule
Replies: 30
Views: 7491

Re: LHC Shutdown schedule

I'm not convinced the temperature readings were incorrect. The warmer magnets seem to be the LSS magnets which stands for Long Straight Section so I guess these are less important. All the LSS temperatures in operational state have been between 4-6K, as far as I remeber. Now some of them are rising...
by josch222
Thu Dec 17, 2009 8:58 am
Forum: The Accelerator
Topic: LHC Shutdown schedule
Replies: 30
Views: 7491

Re: LHC Shutdown schedule

Well I guess this http://hcc.web.cern.ch/hcc/file/cmm.png answers my earlier question about Cryo maintain over xmas. Take a look at http://lhc.web.cern.ch/lhc/Cooldown_status.htm . It seems that they let most of the LSS-magnets warmup, for some reason. Some of the Arc-magnets going up too, it looks...
by josch222
Tue Dec 15, 2009 11:33 pm
Forum: The Accelerator
Topic: Daily Schedules and Hiccups
Replies: 41
Views: 11416

Re: Daily Schedules and Hiccups

They were running nice this afternoon with a 4 bunch at 1.18 TeV beam and another power converter tripped. This seems to be happening a lot. One log mentioned that they had already switched to the second card on that pc. I would love to hear the technical 'discussions' going on about pc reliability...
by josch222
Tue Dec 15, 2009 9:26 pm
Forum: The Accelerator
Topic: OLDER 2/15/10 ** current events and discussion **
Replies: 54
Views: 15858

Re: ** current events and discussion **

I'm curious about the cryo conditions in sector 78. As I've been following along for the past month or so, authorization is usually lifted when the average temperature exceeds about 1.94 or so. The Arch magnets in 78 have been running 1.98 - 1.99 over the last few days but authorization has remaine...
by josch222
Tue Dec 15, 2009 4:37 pm
Forum: Controversial topics
Topic: Several biggest errors of particle physicists.
Replies: 1135
Views: 278251

Re: Several biggest errors of particle physicists.

Ivan, you didn't answer my question - You thought the blue spiral in Norway was a magnetic hole but it turned out you were wrong. It was hypothesis. I did not say about my value of confidence in that. And more, I thought that it was a trick made by anti CERN people. So you thought it was a trick bu...
by josch222
Tue Dec 15, 2009 1:41 pm
Forum: Portal link and forum suggestions
Topic: Yo Xymox, Meltonix has Atlas screens!
Replies: 5
Views: 3041

Re: Yo Xymox, Meltonix has Atlas screens!

Great! Fits almost on my HDTV-Screen with Opera set to 130% Zoom.
by josch222
Mon Dec 14, 2009 8:31 pm
Forum: The Accelerator
Topic: LHC Theme Song ?
Replies: 13
Views: 4161

Re: LHC Theme Song ?

Awesome video, that one in the tunnel :lol: Go Cernettes! Where can I buy records? And when is the next worldtour planned? You can buy a CD (21$) with an additional video clip: http://musiclub.web.cern.ch/MusiClub/bands/cernettes/ Just click on CD, if you scroll down there are some links to downloa...
by josch222
Mon Dec 14, 2009 11:39 am
Forum: The Accelerator
Topic: COOL links
Replies: 57
Views: 23209

Re: COOL links

Wow, a knight avatar...

I think the knights were very smart people, they invented the linear collider
and even made a lot of self-experimentation with it ;-)

Joerg.
by josch222
Mon Dec 14, 2009 9:54 am
Forum: The Accelerator
Topic: basic accelerator theory from a great discussion in chat
Replies: 7
Views: 9055

Re: basic accelerator theory from a great discussion in chat

So from an engineers POV the LHC is a very complex control loop with lots of non-independent tuning parameters and lots of disturbances. Now I have an idea why there was LHC@Home to simulate the behavior of the beams. I wonder if they have to find new settings after the break, small hysteretic effec...
by josch222
Sun Dec 13, 2009 1:14 pm
Forum: LHCb
Topic: a couple of questions
Replies: 6
Views: 4743

Re: a couple of questions

(...) Finally, where can I get a LHC blueprint so I can build one of my own?.......just kidding about the blueprint :D Why kidding? There are a lot of blueprints on the web, not only at CERN sites. Here is an example from a local university: http://www1b.physik.rwth-aachen.de/~cms/Tracker/Modules/ ...
by josch222
Sat Dec 12, 2009 10:53 pm
Forum: The Accelerator
Topic: Interesting blog posts
Replies: 0
Views: 1341

Interesting blog posts

I saw two posts on the uslhc-blog which may explain a bit how they search for new particles. One explains in a relative easy way how they try to find the Higgs: http://blogs.uslhc.us/?p=3394 The other one is about Feynman diagrams (despite there is none in it AFAIK). It is a lot more detailed and wi...
by josch222
Sat Dec 12, 2009 10:17 pm
Forum: New Users Start Here
Topic: Hello to all
Replies: 7
Views: 1851

Re: Hello to all

A very warm welcome to you Josch :) Real nice welcome post :) Hope you have fun here and come into the chatroom too :D Emmylou :ugeek: Thanks a lot for the warm welcome! I think I will not use the chatroom, I'm simply too slow to chat in english ;-) And I know I would spend hours there but have a l...
by josch222
Sat Dec 12, 2009 9:56 pm
Forum: New Users Start Here
Topic: Hello to all
Replies: 7
Views: 1851

Re: Hello to all

Welcome! That's a cool project! Sponsoring a solar cell... yay! *starts counting money* Yes, and like the LHC the team consists of experts from all over the world. You need really good professionals to build a plane with the wingspan of an Airbus and the weight of a car. And a lot of money. But the...