Breaking news 11/23-11/30 09

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Xymox
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Breaking news 11/23-11/30 09

Post by Xymox » Mon Nov 23, 2009 12:43 pm

They have circulated BOTH beams at once !!!

AND COLLIDED THEM !!!


*******************************************
Source: CERN
Content: Press Release
Date Issued: 23 November 2009
*******************************************

Two circulating beams bring first collisions in the LHC

Geneva, 23 November 2009. Today the LHC circulated two beams
simultaneously for the first time, allowing the operators to test the
synchronization of the beams and giving the experiments their first chance
to look for proton-proton collisions. With just one bunch of particles
circulating in each direction, the beams can be made to cross in up to two
places in the ring. From early in the afternoon, the beams were made to
cross at points 1 and 5, home to the ATLAS and CMS detectors, both of
which were on the lookout for collisions. Later, beams crossed at points 2
and 8, ALICE and LHCb.

"It's a great achievement to have come this far in so short a time," said
CERN* Director General Rolf Heuer. "But we need to keep a sense of
perspective – there's still much to do before we can start the LHC physics
programme."

Beams were first tuned to produce collisions in the ATLAS detector, which
recorded its first candidate for collisions at 14:22 this afternoon.
Later, the beams were optimised for CMS. In the evening, ALICE had the
first optimisation, followed by LHCb.

"This is great news, the start of a fantastic era of physics and hopefully
discoveries after 20 years' work by the international community to build a
machine and detectors of unprecedented complexity and performance," said
ATLAS spokesperson Fabiola Gianotti.

"The events so far mark the start of the second half of this incredible
voyage of discovery of the secrets of nature," said CMS spokesperson
Tejinder Virdee.

"It was standing room only in the ALICE control room and cheers erupted
with the first collisions," said ALICE spokesperson Jurgen Schukraft.
"This is simply tremendous."

"The tracks we're seeing are beautiful," said LHCb spokesperson Andrei
Golutvin, "we're all ready for serious data taking in a few days time."

These developments come just three days after the LHC restart,
demonstrating the excellent performance of the beam control system. Since
the start-up, the operators have been circulating beams around the ring
alternately in one direction and then the other at the injection energy of
450 GeV. The beam lifetime has gradually been increased to 10 hours, and
today beams have been circulating simultaneously in both directions, still
at the injection energy.

Next on the schedule is an intense commissioning phase aimed at increasing
the beam intensity and accelerating the beams. All being well, by
Christmas, the LHC should reach 1.2 TeV per beam, and have provided good
quantities of collision data for the experiments' calibrations.

For photos of the first collisions :
http://press.web.cern.ch/press/PressRel ... 7.09E.html

For photos inside the CERN Control Centre see :
http://cdsweb.cern.ch/record/1223969?ln=fr

Follow LHC progress on twitter at http://www.twitter.com/cern
For photos, video and latest information see:
http://press.web.cern.ch/press/lhc-first-physics/
See today's press conference here : http://cdsweb.cern.ch/record/1223965
Contact : http://press.web.cern.ch/press/ContactUs.html

Press contact:
James Gillies
Head of Communication and CERN's spokesman
Tel.: + 41 22 76 741 01
Email: James.Gillies@cern.ch

* CERN, the European Organization for Nuclear Research, is the world's
leading laboratory for particle physics. It has its headquarters in
Geneva. At present, its Member States are Austria, Belgium, Bulgaria, the
Czech Republic, Denmark, Finland, France, Germany, Greece, Hungary, Italy,
Netherlands, Norway, Poland, Portugal, Slovakia, Spain, Sweden,
Switzerland and the United Kingdom. India, Israel, Japan, the Russian
Federation, the United States of America, Turkey, the European Commission
and UNESCO have Observer status.

To unsubscribe from the Interactions News Wire, please email webmaster@interactions.org with "remove" in the subject line.

http://cmsdoc.cern.ch/cms/performance/F ... tary09.htm

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Xymox
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Re: *** Breaking news ****

Post by Xymox » Mon Nov 23, 2009 1:16 pm


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Re: *** Breaking news ****

Post by Xymox » Mon Nov 23, 2009 1:51 pm

The press conference SHOULD be posted to this spot once they are finished

http://indico.cern.ch/conferenceDisplay.py?confId=74880

I think...

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Re: *** Breaking news ****

Post by elliptic » Mon Nov 23, 2009 7:18 pm

The CMS live log showed already a picture of one of the first collisions.

Seems they removed it from the log so that CERN can officially anounce it
again to the world.

However the picture is still there :-)

http://cmsdoc.cern.ch/cms/performance/F ... nEvent.png

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Re: *** Breaking news ****

Post by elliptic » Mon Nov 23, 2009 8:03 pm


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Re: *** Breaking news ****

Post by Texanguy » Mon Nov 23, 2009 10:43 pm

well, seems as if we're all still alive. woohoo. :)

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Re: *** Breaking news ****

Post by Xymox » Mon Nov 23, 2009 10:56 pm

But doesn't it seem a little different ??... Hmmm............... hehehehe

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Re: *** Breaking news ****

Post by elliptic » Tue Nov 24, 2009 12:32 am

Texanguy wrote:well, seems as if we're all still alive. woohoo. :)
I thought there is a black hole group in which postings like this belong and
from which they never should escape.

Anyhow, the energy of the collisions was not high enough yet. :-)

It seems now all the first events are officially announced by CERN and
are (back) on the web pages of the individual experiments.

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Re: *** Breaking news ****

Post by Texanguy » Tue Nov 24, 2009 2:07 am

iiii had no idea. ._. though i do believe in the "cosmic rays" argument and such. i do not think the LHC will be the end of the world or anything like that. i used to, but when i realized, it's silly to think that something less than the power of a natural occurrence could be the cause... i'll admit, there's still that "what if", but the overwhelmingly outnumbering majority of physicists who know their stuff all agree that its safe..even at maximum energy, due to events observed in nature..for example, the so-called "Oh-my-God Particle". Many many times more powerful than the LHC..and no catastrophe. so yeah..no worries, mate. :D

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Re: *** Breaking news ****

Post by chriwi » Tue Nov 24, 2009 8:06 am

It is useless to discuss the black hole stuff at this moment. First of all the energy was far too low until now (they not even uste the power of the LHC but only collided the protons with the energy they got from the injection chain, so nothing new by now).
And even if thewould have produced a stable black hole, as far as I read they would not even notice it at first, maybe it cannot be even seen by the detectors and if the sure cannot pinpoint it right away. Even if there is a micrto black hole it will slowly travel to the center of the earth first and might start to grow there. Even the sceared guys are not shure if it would take years or millions of years until it grows to a size noticalble or even dangerous to the earth. For sure we would not notice anythiong in the first few days to yrears.
Also for the comparison to the cosmic ray events they have a possible difference,cause there the high energy rays hit partivcles at rest relativly to the erth, leaving the black hole with a high impulse wich makesit travel maybe thrugh the earth but with enough impulse to leave the gavityfield of the earth and the sun again and let it starve in interstellarspace. A possible black hole from the LHC might be almost at rest compared to the center of ravitiy of the earth since the 2 beams collide symmetrically, so it would be easyer for the gravity of the earth to capture this hole and drawit to the center of gravity.

So far the possibilities, but I for myperson still belive that Hawking is right and the black hole would evaporate before it could do any harm.

bye

chriwi
bye

chriwi

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Re: *** Breaking news ****

Post by Xymox » Tue Nov 24, 2009 2:44 pm

There seem to be insanely high powered and dense beams of cosmic rays that come from galaxy class black holes at the center of all galaxies. These beams at times point right at other galaxies. If the insanely high powered collisions that resulted created black holes then i think this effect would have been seen long ago. This beam would ultimately produce a whole galaxy being slowly turned into mass of black holes and utter chaos / destruction. I think we would have spotted that by now. Fast / slow moving micro black holes would all occur on a galaxy scale. So despite the trajectory or speed I think they would still end up in some planet or sun when your talking about massive beams of cosmic rays coming from massive black holes.

In fact I think ultra high power collisions are natural. I think they happen all the time. If they produce black holes then obviously nature and evolution along with some physics we might not even understand yet have found ways to deal with any bad results.

I am a pretty firm believer that energies up to cosmic ray levels are perfectly safe.

-IMHO-

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Re: *** Breaking news ****

Post by Texanguy » Tue Nov 24, 2009 7:20 pm

Xymox wrote:There seem to be insanely high powered and dense beams of cosmic rays that come from galaxy class black holes at the center of all galaxies. These beams at times point right at other galaxies. If the insanely high powered collisions that resulted created black holes then i think this effect would have been seen long ago. This beam would ultimately produce a whole galaxy being slowly turned into mass of black holes and utter chaos / destruction. I think we would have spotted that by now. Fast / slow moving micro black holes would all occur on a galaxy scale. So despite the trajectory or speed I think they would still end up in some planet or sun when your talking about massive beams of cosmic rays coming from massive black holes.

In fact I think ultra high power collisions are natural. I think they happen all the time. If they produce black holes then obviously nature and evolution along with some physics we might not even understand yet have found ways to deal with any bad results.

I am a pretty firm believer that energies up to cosmic ray levels are perfectly safe.

-IMHO-
I agree with you when it comes to the fact that energies up to cosmic ray levels are safe. for example, as i've mentioned in a previous post, the observed "Oh-my-God Particle"- an ultra high energy particle that came through earth's upper atmosphere at energies much higher than the maximum that the LHC will be able to achieve :) with no macroscopic consequences

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Re: *** Breaking news ****

Post by Texanguy » Tue Nov 24, 2009 7:27 pm

http://en.wikipedia.org/wiki/Ultra-high ... al_history
a reference as to what i was speaking of (the oh-my-god particle, as well as other ultra-high energy cosmic rays)

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Re: *** Breaking news ****

Post by Stephen » Mon Nov 30, 2009 1:54 am

the LHC accelerated 2 beams of protons to 1.18 TeV, no collisions yet.
http://twitter.com/cern?sess=c0a0491ef8 ... 32854ea8ca

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Re: *** Breaking news ****

Post by Lexa » Mon Nov 30, 2009 2:57 am


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