LHC portal

How to identify pseudoscience (without knowing s.th. about the actual topic): -Use of vague, exaggerated or untestable claims -Over-reliance on confirmation rather than refutation -Lack of openness to testing by other experts -Absence of progress -Personalization of issues -Use of misleading languag...

pixelmasseuse wrote:any clues on deciphering the SPS Visitar pages?

The vertical line gives the current position in the cycle. The blue line is proton intensity, the white line magnetic field strength (beam energy). I am not sure about the yellow line...

Chelle you seem to be refering to analogies that have been constructed to make an otherwise practically not understandable process graspable. Yet without the underlying physics (math), which most of us do not understand (myself included), they are wothless and quickly lead to wrong conclusions.

Ok. So what about the following scenario: The LHC is filled to its design specification (2808 bunches at 7TeV) and now a kicker magnet experiences a malfunction (not just an asynchronous dump, but the magnet is not available at all, we have seen this happening for example in the SPS). Will the colli...

The collimators are designed to gradually absorb the nominal beam energy (nearly 3000 bunches per beam at 7 TeV) in the case of a dump malfunction. Edit: I came to this conclusion after reading this page: http://www.lhc-facts.ch/index.php?page=kollimator (in German), the LHC collimator page sadly is...

see here: http://lhcportal.com/Forum/viewtopic.php?f=4&t=219

Josch222: You might want to read this thread first: http://lhcportal.com/Forum/viewtopic.php?f=4&t=219

The shape of the beam is an ellipse of changing orientation and size that is centered around the orbit, which is not necessarily the mechanical axis.

Yes the beam was lost! But this happens rather often and you will get used to it very soon ;) . Tune refers to the number of transversal oscillations of the beam envelope during one turn in the machine. (The tune is vitaly important for the stability of the beam as there might be resonances.) Dump m...

The collimators scrape away particles that have gone slightly off track in order to prevent damages to the beam pipe and the magnets (a small fraction of the beam hitting a magnet might for example cause a quench http://lhc-collimation-project.web.cern.ch/lhc-collimation-project/lhc_collimation__int...

good work serych!

It's all in the LHC safety report http://lsag.web.cern.ch/lsag/LSAG-Report.pdf : Proton-proton collisions are foreseen at an energy of 7 TeV per beam. An equivalent energy in the centre of mass would be obtained in the collision of a cosmic-ray proton with a fixed target such as the Earth or some ot...

Sort of reminds me of the good old nuclear emulsion...

See here:

The encircled value is wrong compared to the chart and the values on LHC_OP and is showing a rather random behaviour. When B1 is in the same is true for the associated value.

Measuring emittance, tunes, betatron oscillation, orbits, chromacity and so on. All of these can be manipulated by the magnets. Find out more about acclerator science here: http://indico.cern.ch/scripts/SSLPdispl ... &nbweeks=7

See here: http://www-bd.fnal.gov/public/relativity.html and keep in mind that the center of mass energy is the energy that can go into the creation of new particles.