Search found 135 matches
- Tue Sep 14, 2010 8:04 pm
- Forum: The Accelerator
- Topic: Current Events Discussion
- Replies: 512
- Views: 613727
Re: Current Events Discussion
That plan does show them putting ions in the SPS from this time. Perhaps they will be able to try that while the LHC is circulating proton beams. For latest plans see this report from Yesterday - http://indico.cern.ch/getFile.py/access?resId=1&materialId=slides&confId=106926 They say stable beams by...
- Tue Aug 24, 2010 3:59 pm
- Forum: The Accelerator
- Topic: Current Events Discussion
- Replies: 512
- Views: 613727
Re: Current Events Discussion
They got 10.115/μb/s in CMS. That is one tenth of the way to their base target luminosity for this year. I think that is what they were getting excited about
- Tue Aug 24, 2010 11:08 am
- Forum: The Accelerator
- Topic: Current Events Discussion
- Replies: 512
- Views: 613727
Re: Current Events Discussion
Next injection to be 1000ns_50b_35_14_35, so closer trains, slightly more bunches, but slightly less collisions
- Thu Aug 19, 2010 6:49 pm
- Forum: The Accelerator
- Topic: Current Events Discussion
- Replies: 512
- Views: 613727
Re: Current Events Discussion
Expected 12 steps for 48 bunches, but saw 14!
- Sun Aug 08, 2010 6:44 am
- Forum: The Accelerator
- Topic: Current Events Discussion
- Replies: 512
- Views: 613727
Re: Current Events Discussion
They are also celebrating 1/pb = 1000/nb of integrated luminosity.
- Fri Jul 30, 2010 7:57 am
- Forum: Science
- Topic: Let's go hump hunting!
- Replies: 86
- Views: 117080
Re: Let's go hump hunting!
According to the Wednesday morning meeting slides they will be putting in magnetic probes for hump related studies. I guess this means they will use sensitive instruments that could pick up magnetic field oscillations around the collider. If they can detect something that matches the hump signall th...
- Fri Jul 30, 2010 6:52 am
- Forum: The Accelerator
- Topic: Current Events Discussion
- Replies: 512
- Views: 613727
Re: Current Events Discussion
A few protons are lost due to collisions with molecules of the imperfect vacuum in the tube, but most are being lost on the collimators as the beam spreads out. So long as the loss rate is not too high that is perfectly safe. The collimators are designed to take the loss and protect more delicate co...
- Fri Jul 23, 2010 7:13 am
- Forum: Science
- Topic: Large Hadron Collider rival Tevatron 'has found Higgs boson'
- Replies: 2
- Views: 6500
Re: Large Hadron Collider rival Tevatron 'has found Higgs boson'
Whether or not there is anything behind the rumours will be revealed at ICHEP on Monday at 16:00
http://indico.cern.ch/contributionDispl ... nfId=73513
http://indico.cern.ch/contributionDispl ... nfId=73513
- Sun Jul 18, 2010 9:30 am
- Forum: The Accelerator
- Topic: Current Events Discussion
- Replies: 512
- Views: 613727
Re: Current Events Discussion
The current run had a peak lumninosity of 1.6 MHz/barn, about 10% better than previous records.
I think there will a technical stop from Monday for a couple of days. When it returns they are likely to go for more bunches, maybe 24.
I think there will a technical stop from Monday for a couple of days. When it returns they are likely to go for more bunches, maybe 24.
- Fri Jul 16, 2010 3:58 pm
- Forum: Science
- Topic: Let's go hump hunting!
- Replies: 86
- Views: 117080
Re: Let's go hump hunting!
The results of the GSM Hump test was negative. Just another possibility ruled out.
- Thu Jul 15, 2010 9:24 pm
- Forum: The Accelerator
- Topic: Current Events Discussion
- Replies: 512
- Views: 613727
Re: Current Events Discussion
Yes but isn't the aim to produce one inverse femtobarn at 14 TeV centre of mass ? Since the machine is operating at only 7 TeV presumably this won't be adding to this total. The rough plan is one inverse femtobarn at 7TeV by end of 2011 and 60 inverse femtobarn at 14Tev by end of 2016. See https://...
- Thu Jul 15, 2010 3:50 pm
- Forum: The Accelerator
- Topic: Current Events Discussion
- Replies: 512
- Views: 613727
Re: Current Events Discussion
femtobarn is smaller than nanobarn, so inverse femtobarn is bigger than inverse nanobarn. It is terminology designed to confuse. They should just call an inverse barn a narb so that they can talk about Meganarbs, Giganarbs , Teranarbs etc. So now they have about 240 Giganarbs. They are aiming for 10...
- Wed Jul 14, 2010 3:28 pm
- Forum: The Accelerator
- Topic: Current Events Discussion
- Replies: 512
- Views: 613727
Re: Current Events Discussion
Today's run was the best yet with about 15 hours of stable beams and luminosities above 1.0 for most of the run. No sign if the sharp losses seen on previous runs. integrated luminosity was about 50 inverse nanobarns taking accumulated total to around 200 inverse nanobarns. LHC is starting to behave...
- Mon Jul 12, 2010 3:10 pm
- Forum: The Accelerator
- Topic: Current Events Discussion
- Replies: 512
- Views: 613727
Re: Current Events Discussion
That was an excellent run this morning with 9 bunches and good luminosity around 0.8 . Probably added about 25 to 30 inverse nanobarns in one run. Next they are stepping up to 12 bunches.
- Sun Jul 11, 2010 6:16 pm
- Forum: The Accelerator
- Topic: Current Events Discussion
- Replies: 512
- Views: 613727
Re: Current Events Discussion
They are planning to attempt multibunch injections for the first time. That means sending more than one bunch from the SPS into the LHC in one go. it will be interesting to see what that looks like on the vistas.