Backreaction: Big Bang V2.0

By Bee on Friday, January 11, 2008

Some more videos at www.labreporter.com

Labels: Video

9 Comments:

At 12:43 PM, January 11, 2008, stefan said...: Cool movies! Unfortunately I don't have sound at the moment...
At 12:45 PM, January 11, 2008, Bee said...: yeah, the movies make quite a professional impression. neat little introductions, and in addition easily bloggable ;-)
At 4:19 PM, January 11, 2008, Klaus said...: Greetings!

here another good video on the LHC:

http://youtube.com/watch?v=fPxYdObyJ2A&feature=related

Best
Klaus
At 8:23 PM, January 11, 2008, Phil Warnell said...: Hi Bee,

Good flick. I must tell you however when I first saw Dr. Brian Cox’s face on the YouTube still shot, he sort of reminded me of Ted Login (Keanu Reeves) from the Bill and Ted movies. I was expecting to hear him start up by saying something like “hey dudes we are about to begin another excellent adventure with this Large Hadron Collider gismo”. Then of course Dr. Cox comes on with this perfectly articulate Brit accent and my illusion was shattered :-)

All kidding aside, with the enormous amount of work and resource that have gone into this project (not to mention the hype) they better come up with something, higgs or no higgs.

Regards,

Phil
At 10:29 PM, January 11, 2008, Seb Thaler said...: If only the U.S. high-energy physics community could market itself as well as the LHC folks do here, Fermilab might not be in the dire situation in which it's in today.
At 11:40 PM, January 11, 2008, Klaus said...: Hi again,

do you happen to know when LHC will actually be operative? the nov.07 deadline did not hold!

How much matter (protons) is actually traveling in that beam?

I hear, that the energy of the beam could be compared to a train of 400t traveling at 150km/t.
That would be approximately 350Mj

gest

Klaus
At 5:35 PM, January 12, 2008, stevelinton said...: Klaus asked about the mass of the beams. With a little help from the units program, we can answer this:

If the 350MJ figure is right, this is about 2 x 10^15 TeV which suggests something on the order of 10^15 nucleons in the beam, since the energy to be achived is a few TeV per nucleon. This many nucleons has a rest mass of order 10^-12 kg (a few nanograms).

On the other hand the reletavistic mass should be higher -- a few times 10^-9 kg, ie a few micrograms.
At 6:40 PM, January 12, 2008, stefan said...: Hi Klaus, Steve,

you can find more information in this PDF file provided by CERN, CERN FAQ – LHC the guide.

Page 23:

In the LHC, under nominal operating conditions, each proton beam has 2808 bunches, with each bunch containing about 10^11 protons

... which makes about 3×10^14 protons per beam, or, at 7 TeV per proton, 2×10^27 eV per beam... That's about 320 MJ per beam, indeed... the kinetic energy of an impressive mass of 100 tons moving at 80 m/s, if I haven't mixed up some orders of magnitude.

BTW, according to this press release citing the ceding director Robert Aymar as of December 2007, the plan is to start physics research at the Large Hadron Collider (LHC) in summer 2008.

Maybe someone knows something more specific?
At 9:30 PM, January 13, 2008, Klaus said...: Hi Stefan,

what do you think would happen if the LHC experienced a powerfailiure during this peak energy condition?

The energy of that beam has to escape somewhere..?

I power is available they would normally do a controlled electrodynamic "breaking".

best

Klaus

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