What are the current records for LHC fills?
What are the current records for LHC fills?
Is there a page that records current records for LHC fills?
In particular, I'm looking for records of: 1. max instantaneous luminosity, 2. Max integrated luminosity over (a)one fill (b)one day, (c) one week 3. Max time for one fill
Cheers,
jmc2000
In particular, I'm looking for records of: 1. max instantaneous luminosity, 2. Max integrated luminosity over (a)one fill (b)one day, (c) one week 3. Max time for one fill
Cheers,
jmc2000
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Re: What are the current records for LHC fills?
try this https://cern.ch/LHC-Statistics or from portal LHC-> Coordination -> LHC Statistics ( near top center of the page)
Re: What are the current records for LHC fills?
Can I get the record for integrated luminosity in one fill from this?RocketManKSC wrote:try this https://cern.ch/LHC-Statistics or from portal LHC-> Coordination -> LHC Statistics ( near top center of the page)
Fill #4467 has been going for 22 hours with an integrated luminosity of 230pb for Atlas, which I suspect is a record.
Regards,
JMc
Re: What are the current records for LHC fills?
It is a record for 2015.
2012 had a higher luminosity, so the longest fills there got more. 240/pb, for example, and I don't think that was the best fill ever.
Edit: Nearly 290/pb in a 24-hour-run today (October 27th). Preaccelerator issues are good for lumi/fill records.
Now they try to go up by another 200 bunches. Could give a record luminosity for 13 TeV.
2012 had a higher luminosity, so the longest fills there got more. 240/pb, for example, and I don't think that was the best fill ever.
Edit: Nearly 290/pb in a 24-hour-run today (October 27th). Preaccelerator issues are good for lumi/fill records.
Now they try to go up by another 200 bunches. Could give a record luminosity for 13 TeV.
Re: What are the current records for LHC fills?
@mfb it's a record, despite the instantaneous luminosity being only 4.5nb/s compared to over 7nb/s in 2012, but the longer beam life time makes up for this: >30 hours compared to 10 hours in 2012.
Re: What are the current records for LHC fills?
On the way to a new record. With an initial luminosity slightly above 50% of the design value for ATLAS and a bit lower for CMS (why?), we are at 271 and 262/pb respectively, while the luminosity is still 32% the design value after ~19 hours. Don't see plans to dump it yet, so in two hours we can have more than 290/pb and in ~2.5 hours about 300/pb for ATLAS.
Edit: Ouch. The beam got dumped literally one minute after I wrote this post. Unplanned, no description yet.
Edit2: RF cavity trip. They'll refill soon.
Edit: Ouch. The beam got dumped literally one minute after I wrote this post. Unplanned, no description yet.
Edit2: RF cavity trip. They'll refill soon.
Re: What are the current records for LHC fills?
Here we go PS is down for 5 days. Lets hope they can hold the beam for some time.mfb wrote:Preaccelerator issues are good for lumi/fill records.
Re: What are the current records for LHC fills?
Nearly 200/pb so far in 21 hours. Would be interesting to see what happens after 30+ hours. Lumi dropped from ~35% to ~18% design value so far.
Re: What are the current records for LHC fills?
The longest fill I found was fill 2006, just slightly below 26h. Just passed, so at least we have a new record for longest fill.
Re: What are the current records for LHC fills?
Fresh from the morning meeting:
Longest fill in Stable Beams in the LHC history was Fill 1058 that lasted from 1:13am April 24th 2010 until 7:30am 25th April 2010 for a total of 30h17min
Re: What are the current records for LHC fills?
Now we are at nearly 33 hours.
4:35 -> at least 13:21 (+1d).
ATLAS/CMS luminosity dropped to 1350 Hz/µb (from initially 3500), LHCb luminosity starts to drop as well (175 -> 163). 260/pb and 21/pb integrated luminosity respectively.
Long beyond the point where refilling would be better for luminosity, but as this is not possible...
Bunch length usually goes down over time, but after ~24 hours it started to increase a bit.
4:35 -> at least 13:21 (+1d).
ATLAS/CMS luminosity dropped to 1350 Hz/µb (from initially 3500), LHCb luminosity starts to drop as well (175 -> 163). 260/pb and 21/pb integrated luminosity respectively.
Long beyond the point where refilling would be better for luminosity, but as this is not possible...
Bunch length usually goes down over time, but after ~24 hours it started to increase a bit.
Re: What are the current records for LHC fills?
Some updated records:
- Longest time in stable beams: 35 hours 24 minutes, the run mentioned in the last post.
- Luminosity record: 7.9*10^33/(cm^2*s), or 79% design luminosity, by ATLAS yesterday evening and again this morning. CMS shows lower luminosity values, which is probably just a different calibration, so the luminosity could have been a bit lower (~5% uncertainty is not unrealistic). The run 1 record was 77% the design luminosity, so we are at the same level now. Assuming we beat the run 1 record, this is a record for hadron colliders in general.
- Integrated luminosity in 24 hours or within a day: ~350/pb Thursday, an all-time record certainly for the day (run 1 record was a bit below 300/pb for any given day) and probably for the 24 hours as well.
- Integrated luminosity in a single run: 350/pb (CMS value), an all-time record as well. (Edit: Updated with final number)
Integrated luminosity this year is now more than 2.1/fb for ATLAS and CMS, 125/pb for LHCb. More than 15% of that has been collected in the record fill.
Edit on Sunday: ATLAS got 375/pb integrated luminosity in ~18 hours, then the beams got dumped by machine protection. As comparison, that's about 3 months of Tevatron data, but at a higher energy. In this single run, more Higgs bosons were produced than at the Tevatron in 20 years.
2.8/fb in total.
- Longest time in stable beams: 35 hours 24 minutes, the run mentioned in the last post.
- Luminosity record: 7.9*10^33/(cm^2*s), or 79% design luminosity, by ATLAS yesterday evening and again this morning. CMS shows lower luminosity values, which is probably just a different calibration, so the luminosity could have been a bit lower (~5% uncertainty is not unrealistic). The run 1 record was 77% the design luminosity, so we are at the same level now. Assuming we beat the run 1 record, this is a record for hadron colliders in general.
- Integrated luminosity in 24 hours or within a day: ~350/pb Thursday, an all-time record certainly for the day (run 1 record was a bit below 300/pb for any given day) and probably for the 24 hours as well.
- Integrated luminosity in a single run: 350/pb (CMS value), an all-time record as well. (Edit: Updated with final number)
Integrated luminosity this year is now more than 2.1/fb for ATLAS and CMS, 125/pb for LHCb. More than 15% of that has been collected in the record fill.
Edit on Sunday: ATLAS got 375/pb integrated luminosity in ~18 hours, then the beams got dumped by machine protection. As comparison, that's about 3 months of Tevatron data, but at a higher energy. In this single run, more Higgs bosons were produced than at the Tevatron in 20 years.
2.8/fb in total.
Re: What are the current records for LHC fills?
The technical stop is over, and we directly got a record run! Started 0:20, dump is expected for 22:00 (in 2 hours), so the numbers will go up a bit more.
- Luminosity record: ~8.6*10^33, 86% design luminosity, displayed by ATLAS
- Integrated luminosity in 24 hours, in a single run, and within a day: At 430/pb for ATLAS so far (CMS: 410/pb), probably 450/pb for ATLAS by 22:00.
- Luminosity record: ~8.6*10^33, 86% design luminosity, displayed by ATLAS
- Integrated luminosity in 24 hours, in a single run, and within a day: At 430/pb for ATLAS so far (CMS: 410/pb), probably 450/pb for ATLAS by 22:00.
Re: What are the current records for LHC fills?
With only a bit of trouble between fills, there's another one going on.
If thing stay going this way, we are going to break the "maximum luminosity per week" record.
If thing stay going this way, we are going to break the "maximum luminosity per week" record.
- Tau
Re: What are the current records for LHC fills?
Wednesday is reserved for beta*=2.5 km runs, no relevant luminosity from that day probably, but apart from that: sure.
Edit: >=24 hour run with 0.51/fb for ATLAS / 0.49/fb for CMS yesterday to today morning. Programmed dump after the luminosity was too low.
CERN discusses some of those records
2/fb in a single week is a record as well.
Edit: >=24 hour run with 0.51/fb for ATLAS / 0.49/fb for CMS yesterday to today morning. Programmed dump after the luminosity was too low.
CERN discusses some of those records
2/fb in a single week is a record as well.