Search found 42 matches

by JNW
Thu Mar 01, 2012 3:19 am
Forum: The Accelerator
Topic: 2012 Events Discussion
Replies: 100
Views: 73951

Re: 2012 Events Discussion

I just looked at the cryo page, and at the moment it's all green. :mrgreen:
by JNW
Wed Jan 18, 2012 7:18 pm
Forum: The Accelerator
Topic: 2011 Events Discussion
Replies: 184
Views: 37622

Re: 2011 Events Discussion

I see from the Cryo status page that they've started cooling the arc magnets.

However, the lhcportal Progress link still points to last year's "latest news". Is there something like that for this year?
by JNW
Tue Oct 18, 2011 1:55 pm
Forum: Science
Topic: Neutrinos go faster then light !
Replies: 109
Views: 92187

Re: Neutrinos go faster then light !

Tomaso Dorigo says that ICARUS says nah to Superluminal neutrinos. http://www.science20.com/quantum_diaries_survivor/icarus_refutes_operas_superluminal_neutrinos-83684 They're assuming that the neutrinos are traveling as normal neutrinos, which would quickly lose energy from emitting the weak force...
by JNW
Mon Oct 17, 2011 3:27 pm
Forum: The Accelerator
Topic: 2011 Events Discussion
Replies: 184
Views: 37622

Re: 2011 Events Discussion

Harbles wrote:Now just a fill or two away from crossing 4fb-1.

http://lpc.web.cern.ch/lpc/lumiplots.htm
ATLAS and CMS are both over 5fb-1 now.
by JNW
Tue Aug 23, 2011 6:34 pm
Forum: Science
Topic: About Higgs - Seems that the signal is fainting
Replies: 1
Views: 1113

Re: About Higgs - Seems that the signal is fainting

Whether this is good or bad depends on your point of view. The Higgs is the most boring way to plug a hole in the Standard Model. If there's no Higgs, then there must be something much more interesting out there, waiting to be found.
by JNW
Thu May 05, 2011 3:01 am
Forum: Controversial topics
Topic: Frequencies and Densities
Replies: 17
Views: 7478

Re: Vacuum Bubbles

The size of a proton is 0.1 nm (10^-10) That's atomic size. The size of a proton is around 10^-15 m. Next to that the LHC detectors might produce 10^34 collisions per second and per cm^2. ( source ) That's not the number of collisions. That's what you multiply by the extremely small cross section t...
by JNW
Sat Feb 12, 2011 5:29 pm
Forum: The Accelerator
Topic: 2011 Events Discussion
Replies: 184
Views: 37622

Re: 2011 Events Discussion

The portal's LHC "Progress" link needs to be updated. The new link is:

http://lhc-commissioning.web.cern.ch/lh ... -news.html
by JNW
Sat Dec 25, 2010 3:58 am
Forum: The Accelerator
Topic: Merit of different collision types
Replies: 3
Views: 2409

Re: Merit of different collision types

Is it possible that collisions between two very elementary particle such a the electron and positron, would be too "simple" and would not yeld any interresting (new) particles such as the (in-) famous Higgs? When an electron and positron annihilate, they can produce a virtual photon or virtual Z0 (...
by JNW
Mon Dec 20, 2010 12:26 am
Forum: The Accelerator
Topic: Merit of different collision types
Replies: 3
Views: 2409

Re: Merit of different collision types

Actually, LEP also used electron-positron collisions. With electron-positron collisions the particles annihilate and nearly all the energy is available for the collision products. Also, the amount of energy is fairly consistent and known. And there is no special requirement imposed on the products, ...
by JNW
Tue Sep 21, 2010 2:15 am
Forum: The Accelerator
Topic: Portal updates.
Replies: 4
Views: 1917

Re: Portal updates.

Xymox wrote:Anything you can think of that needs addressing. ...
Some of the portal links are being redirected. For instance:

In the ATLAS section the "LIVE collisions" link.
In the LHCb section the "Status" link.
by JNW
Fri Apr 23, 2010 3:37 am
Forum: The Accelerator
Topic: Current Events Discussion
Replies: 512
Views: 71596

Re: Current Events Discussion

how much of the beam comissioning they are doing now will need to be repeated when they run at 7Tev? They will have a much better understanding of the machine by the time they go to 7TeV. And many of the problems that they've solved will stay solved. So re-commissioning at 7TeV should go significan...
by JNW
Thu Apr 22, 2010 12:57 am
Forum: The GRID
Topic: Question about LHC Home site, BOINC download link broken
Replies: 16
Views: 8607

Re: Question about LHC Home site, BOINC download link broken

rhody wrote: I googled for BOINC, and got many hits, but need a good reliable site for the BOINC Client.
The main BOINC site is: http://boinc.berkeley.edu/
by JNW
Sat Apr 03, 2010 4:22 am
Forum: Science
Topic: Let's go hump hunting!
Replies: 86
Views: 19880

Re: Let's go hump hunting!

Electrical interference can be caused by an alternative ground path. Here's an example. Assume we're in the US where many electrical outlets have a 120VAC hot wire and the return is near ground potential. If you plug in an appliance that draws current, then the current in the hot wire and the curren...
by JNW
Thu Apr 01, 2010 2:22 am
Forum: The Accelerator
Topic: Current Events Discussion
Replies: 512
Views: 71596

Re: Current Events Discussion

The beams are still going, and with good lifetimes, too!

And LHCb just had a bizarre event: http://lblogbook.cern.ch/Shift/100401_0 ... 4210_0.jpg

:shock: