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Weasel Apparently Shuts Down World's Most Powerful Particle Collider

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posted on May, 19 2016 @ 01:20 PM

Nice thread!

posted on Jun, 2 2016 @ 06:12 PM

Beams are made of “trains” of bunches, each containing around 100 billion protons. These bunch trains are circulating at almost the speed of light in opposite directions and cross one another at the centre of the experiments. The intensity of the beams, in other words the number of proton bunches, was gradually increased to achieve 2040 proton bunches per beam yesterday...

As a result, the experiments are raking in the data. The integrated luminosity has exceeded the milestone of one inverse femtobarn earlier this week – already a quarter of the integrated luminosity recorded throughout 2015...

This performance is even more remarkable given that the chain of accelerators that feed the LHC faced a technical issue last week. A fault in a main power supply of the Proton Synchrotron (PS) accelerator stopped the accelerator chain for several days. PS, commissioned in 1959, is the third link in the chain of four accelerators that propel the protons before they are injected into the LHC. Power was back to the PS last Thursday.

Source: CERN, Updates, June 2, 2016 - Data harvest in the LHC

So they had another power issue last week. This is the first time I heard about that. But they kept the trains rolling (hehe) for 35 hours until power could be restored to PS accelerator. Now they are swimming in data! The general notion here is that they have already reached 1/4 for what they reached last year in total. "Luminosity" is a general measurement of how effect the collisions are happening.

The science is happening now!

edit on 2-6-2016 by TEOTWAWKIAIFF because: grammar nazi

posted on Jun, 21 2016 @ 11:39 AM

So they have been circulating beams around since coming back on-line (see previous post). CERN has also released reports about last year's experiments at their site--next batch will include work done this year, est. release date is August, 2016. If you think LHC is just some large experiment they dreamt up in the near past... time to rethink that notion.

The Super Proton Synchrotron (SPS), CERN’s second-largest accelerator, is celebrating its 40th birthday. But the 7-kilometre-circumference accelerator is not getting a break for the occasion: it will continue to supply the Large Hadron Collider (LHC) and several fixed-target experiments with protons and heavy ions.

The SPS began life in a particularly spectacular fashion. On 17 June 1976, the machine, a giant among its contemporaries, accelerated protons to 300 gigaelectronvolts (GeV) for the first time.
At present, for example, it supplies particles to the COMPASS, NA61/Shine, NA62 and NA63 experiments, and it will shortly start sending protons to the new AWAKE project

CERN, Updates, June 17, 2016 - Happy Birthday SPS!

SPS, the site says, was converted to a proton-antiproton collider which is where they found the new W and Z bosons (same source). Which is a perfect setup for the next update from CERN.

AWAKE (the Advanced Proton Driven Plasma Wakefield Acceleration Experiment) will be the first accelerator of its kind in the world. It is currently under construction, but hopes to test the concept that plasma wakefields driven by a proton beam could accelerate charged particles.
AWAKE hopes to start collecting physics data by the end of the year. Next the team will finalise installation of the experiment, the laser and the full plasma cell.

CERN, Updates, June 17, 2016 - First beam enters unique AWAKE experiment

Plasma is just ionized gas. You've seen them before in compact fluorescent light bulbs, neon signs, and that novelty globe where the "lightening" follows your fingers when you touch it. They are also created to heat hydrogen isotopes to the point of nuclear fusion. Now CERN is going to put them to the test and try and accelerate particles! The particles will ride the wake in front of the plasma just like a surfer rides a wave (source below, nearly the same terminology)! The current acceleration methods have an upper limit where the beam can interfere with the beam pushing it and heat up towards those of fusion temps. Since the accelerators are built to speed up beams and not create a fusion reaction this would cause damage to the machine. Stanford Univ. says the theoretical upper speeds are "10s of billions eV per meter" SLAC Portal - Plasma Wakefield Acceleration.

Happy birthday SPS and let us hope that your new little brother AWAKE has just as much success!

posted on Jun, 28 2016 @ 04:50 PM
I found this link after seeing yet another "strange could formation" over CERN (or Geneva, or LHC, take you pick) because they are opening 'portals' (again)


Afraid to click the link? Here I a story about the creator of the site: ZDNet - Has the Large Hadron Collider destroyed the world yet?. (PS - The link returns a glib: Nope.)

Turns out he's a 20-something with a sense of humor and 10$ a month to spare to allay all your fears! Hey, it is on the internet so it must be true! Right?

posted on Jul, 5 2016 @ 06:28 PM
Now appearing for one day only!

Make your own Higgs Boson pizza!

Well the fine folks over there at CERN (source of the link) have a sense of humor (like on April Fools Day they ran a story about discovering The Force! Yep, that one. The one that binds us together from Star Wars). So they threw a couple recopies on their website on how to make a pizza crust and then either veggie or meat topping options. Once you cook the dough for a bit you pull it out and top it using one of their particle trace diagrams of a Higgs Boson with your toppings of choice! You finish the pizza and enjoy a slice of Higgs Boson pizza! Not exactly cutting edge science but it is a fun way to introduce physics in a non-threatening manner ("do your homework!" vs. pizza).

No weasels were hurt in the making of the Higgs Boson pizzas!

posted on Jul, 27 2016 @ 11:33 AM

A new furnace arrived at CERN’s Large Magnet Facility last month and is currently being installed and tested.
Nb3Sn has been chosen for the next generation of superconducting magnets. The field achieved with this material can reach up to 16T. The production of such coils is complex as we must first wind the coils and then perform the heat treatment that allows the tin and niobium to react and turn into the superconducting Nb3Sn compound.” explains Friedrich Lackner, a project engineer who supervises the coil production for HL-LHC.
The new 32-metre-long furnace, called GL010000, will allow the heat treatment of coils with a length up to 11m and can reach temperatures up to 900°C providing a sufficient margin for future challenges.

CERN, July 18, 2016 - New furnace a step towards future collider development.

One step closer to opening those portals so demons from the 6th plane of Hell can come streaming into our dimension! And what a cool name "GL01 10K". The making of superconducting magnets usually creates a brittle ceramic material (cuprate) and this one is metallic but still as brittle. So they wind the material before baking it so it does not crumble. The article states they currently use 8.3T coils which is way below an MRI (i.e., not strong enough to open a portal!).

I think eventually they will use REBCO which can generate a 30T field strength superconductor magnetic field. The size also decreases with REBCO so it is kind of a wonder why they just don't do the full upgrade. Still cool news from LHC and CERN!

posted on Aug, 9 2016 @ 02:42 PM

With a larger data set now analysed, more precise measurements of the Standard Model processes and more sensitive searches for the direct production of new particles at the highest energy are possible. As an example, the 125 GeV Higgs boson, discovered in 2012, has now also been observed at the new energy of 13 TeV with higher statistical significance. In addition, both ATLAS and CMS experiments have made new precise measurements of Standard Model processes, especially looking for anomalous particle interactions at high mass, a very sensitive but indirect test for physics beyond the Standard Model.
ATLAS and CMS have also looked for any signs of the direct production of new particles predicted by Supersymmetry and other exotic theories of physics beyond the Standard Model, but no compelling evidence of new physics has appeared yet. In particular, the intriguing hint of a possible resonance at 750 GeV decaying into photon pairs, which caused considerable interest from the 2015 data, has not reappeared in the much larger 2016 data set and thus appears to be a statistical fluctuation.

CERN, Press Releases, Aug. 5, 2016 - Chicago sees floods of LHC data and new results at the ICHEP 2016 conference.

Some of this was hinted at and/or reported all last week. What everybody needs to understand is that the amount of data being generated has increased "5 times" over 2015 (same source). So the new data is scanned for those points of interest and they did not find anything. Conspiracy? No, the machine was operating at the edge of its ability so who knows what was recorded. After the increase, the weasel incident, and restart, they had more power for more precise measurements (that is the quip about the Higgs-boson at "higher [statistical] significance").

The measurement 750 GeV was a resonance (like a harmonic on a string) that was interesting but not found. If a real particle was there they would have found it... and other anomalies. Like last year, and because there is more data, it will be continued to be poured over for any unexpected findings. The Standard Model seems safe... for now.

posted on Aug, 19 2016 @ 05:55 PM

The Large Hadron Collider’s (LHC) performance continued to surpass expectations, when this week it achieved 2220 proton bunches in each of its counter-rotating beams – the most it will achieve this year.

This is not the maximum the machine is capable of holding (at full intensity the beam will have nearly 2800 bunches) but it is currently limited by a technical issue in the Super Proton Synchrotron (SPS).
The SPS is currently experiencing a small fault that could be exacerbated by high beam intensity – hence the number of proton bunches sent to the LHC per injection is limited to 96, compared to the normal 288.

CERN Updates, Aug. 19, 2016 - LHC pushes limits of performance.

So they have peaked for the year. No more, larger punches into other dimensions!

They have two more months of runs to go but they have reached the upper limit of the number of particles circulating at once. After this year's run is complete they will go in and fix the SPS. So next year is the year of doom (I hope we find Hellboy!).

I think it is pretty cool that they get the beams up and spinning then just leave them circulating by themselves for up to 20 hours (as noted in the update).
edit on 19-8-2016 by TEOTWAWKIAIFF because: clarity

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