LHC portal

Comparing the different sources, always for delivered: LHC statistics : ATLAS 27.2, CMS 27.77, LHCb 1.35 LHC lumi plots : ATLAS 27.1, CMS 28.8, LHCb 1.28 ATLAS : 26.6 CMS : 28.97 LHCb : 1.35 "Between 27 and 29 inverse femtobarn" is probably a reasonable guess for the dataset so far. In the schedule ...

Progress has been a bit slower the last weeks, but we are surpassing the initial integrated luminosity goal for this year these days. ATLAS shows 24/fb, CMS shows 27/fb, at least one calibration is off.

ATLAS and CMS

Then publish it. Or put it on arXiv first.

Until that happened, can we get back to actual science?

Okay, that is... interesting.

For now the LHC is running again, initial luminosity this morning was a bit above the design luminosity.

The problem is external. Current VISTARS message:

PS vacuum issue: no beam from PS until tomorrow.
Mitigation for RB.A12 under implementation to allow physics as soon as beam back in PS

More details at 8:30 meeting on Friday

I would be curious what they can do if they find a monopole. One of the search methods takes small pieces of detector material and scans them for monopoles - if they find one inside, can they isolate it and place it in a trap? Imagine they "find a new particle" - and have to be really careful not to...

It is an electric problem - the beam drilling a hole through the magnet would look differently.

Here is the last beam as it arrived at the beam dump (the image will change once they have the next dump, but then the problem has been fixed).

The number of bunches went up for this run (2174), the luminosity improved only marginally. On the other hand, we have this weird ATLAS/CMS discrepancy, no idea which value to trust for overall normalization.

Performance has been worse since the MD block, lower time in stable beams and the initial luminosities are lower as well. We'll probably get some improvement from the increased number of bunches soon.

The corresponding paper got discussed here. Someone (search for "23 July 2016 at 07:50") made some valid points about the quality of the statistical analysis in the paper.

https://lpc.web.cern.ch/lumiplots_2016_pp.htm Is this what you mean? There is also the statistics page which is linked on the portal. Something more like this: https://op-webtools.web.cern.ch/vistar/vistars.php?usr=LHC3 But a luminosity plot for a particular fill rather than over the last 24 hours....

For intermediate values in fills: only from the VISTARS pages as far as I know (see a few posts above for a record of them), or with access to experiment data. There are dedicated lifetime plots from the machine operation but I don't think they are available publicly. For (stable beam duration, inte...

The proton speed does not change. It is something like 99.999999% the speed of light - with some change in the last decimal place when we went from 4 TeV per proton (2012) to the current 6.5 (since 2015). The difference to the speed of light is about the speed of a pedestrian. The number of protons ...

No announcement of dedicated talks so far, so either we get something last minute (certainly possible given the rapid data collection in the last weeks) or we'll know more on August 5th, 8:00 to 9:20 Chicago time (15:00 - 16:20 CERN time): Search for high mass Higgs bosons using the ATLAS detector (...

Some VISTARS pages got captured and put in time lapse videos - about one minute per day. Youtube channel