Search found 27 matches

by sciing
Wed Jun 28, 2017 5:21 am
Forum: The Accelerator
Topic: 2017 Operation
Replies: 72
Views: 19888

Re: 2017 Operation

CMS reported over 700/pb delivered for yesterday.
by sciing
Tue Jun 27, 2017 10:08 am
Forum: The Accelerator
Topic: 2017 Operation
Replies: 72
Views: 19888

Re: 2017 Operation

We're at a luminosity of around 1.4/nb/s so would I be right in believing they haven't tried BCMS yet this year? No, it looks clearly like BCMS. Emi is around 2.3 like BCMS Lumi is up to 1.55, which could not be achieved with 2460 bunches, if not BCMS. I guess the difference to calculation is due h...
by sciing
Mon Jun 26, 2017 5:20 am
Forum: The Accelerator
Topic: 2017 Operation
Replies: 72
Views: 19888

Re: 2017 Operation

A very productive week, with a new record for peak lumi. Now 2460 bunches in, is that the maximum?
I guess there is maybe also a new 24h record.
I hope mfb can give a short summary from the morning meeting.
by sciing
Fri Jul 29, 2016 6:46 am
Forum: The Accelerator
Topic: Which page holds the correct luminosity results?
Replies: 1
Views: 1341

Re: Which page holds the correct luminosity results?

The 1st one are very raw, the even missing runs, if the lumi reporting was down. The later ones seems to the experiments and are corrected if the lumi calculation was changed. I guess it is quite easy to say which one you should trust. There is a 3rd one from the, which is at least more up to date, ...
by sciing
Tue Jul 26, 2016 5:58 pm
Forum: Science
Topic: new particle with 750 GeV
Replies: 12
Views: 3075

Re: new particle with 750 GeV

Nice study about background issues at high energy for di photon signals. https://indico.cern.ch/event/466926/contributions/2254437/attachments/1315541/1970590/perez.pdf Often only statistical significance is discussed, but especially here the background model is in this case not just a simple fit, m...
by sciing
Mon Jul 25, 2016 11:46 am
Forum: The Accelerator
Topic: 2016 operation
Replies: 52
Views: 11496

Re: 2016 operation

The turn around time decreased now to 3 hours, great!! In the morning meeting slides are some curves for optimal fill length for 4h and 5.8h TAT for different fills. slide 15 https://indico.cern.ch/event/549118/contributions/2226174/attachments/1314621/1968965/lhc-mm-25JUL16_WH.pdf An always optimum...
by sciing
Wed Jul 20, 2016 5:42 am
Forum: The Accelerator
Topic: 2016 operation
Replies: 52
Views: 11496

Re: 2016 operation

CMS should just past 17/fb. Record day on monday with over 600/pb. As I had wrote 20/fb till MD1, I just realized that this should be impossible. But now still 6 days left till tuesday morning. So my my over optimistic guess it is not out of reach. After MD1 there are still more than 10 weeks, 40/fb...
by sciing
Sat Jul 09, 2016 5:37 pm
Forum: The Accelerator
Topic: 2016 operation
Replies: 52
Views: 11496

Re: 2016 operation

What a perfect week so far, 4 fills dumped by OP in a row. Far above 400/pb per day. Already 2.8/fb in this week. So plan is now 24h fills with >500/pb like this week. So a perfect week could now achieve 3-3.5/fb. Amazing:-) I am an optimist we will see 20/fb before MD1 (in 17 days) :-) My old guess...
by sciing
Thu Jul 07, 2016 5:59 pm
Forum: The Accelerator
Topic: CMS and ATLAS luminosity: are they jealous?
Replies: 6
Views: 2685

Re: CMS and ATLAS luminosity: are they jealous?

Looks like CMS completetly recalculated the online lumi. This plot shows 1/fb more: http://cms-service-lumi.web.cern.ch/cms-service-lumi/publicplots/int_lumi_per_day_cumulative_pp_2016OnlineLumi.pdf than this one, which would was the trend till yesterday: http://lpc-afs.web.cern.ch/lpc-afs/LHC/2016/...
by sciing
Thu Jul 07, 2016 5:49 pm
Forum: The Accelerator
Topic: 2016 operation
Replies: 52
Views: 11496

Re: 2016 operation

30/fb is quite pessimistic, isn't? As I said 40/fb is optimistic, so in between 35/fb is realistic;-)
by sciing
Thu Jul 07, 2016 4:31 pm
Forum: The Accelerator
Topic: CMS and ATLAS luminosity: are they jealous?
Replies: 6
Views: 2685

Re: CMS and ATLAS luminosity: are they jealous?

Atlas had some Lumi measurement problems in the last fill. With the wrong lumi data CMS equals to Atlas for integrated. Suprisingly the instant lumi in todays fill is now equal, too.;-)
by sciing
Thu Jul 07, 2016 4:27 pm
Forum: The Accelerator
Topic: 2016 operation
Replies: 52
Views: 11496

Re: 2016 operation

Wild? Taking the data from one month and assume the same for the rest of the year. I guess it will be not that wrong finally.
by sciing
Tue Jul 05, 2016 9:02 pm
Forum: The Accelerator
Topic: 2016 operation
Replies: 52
Views: 11496

Re: 2016 operation

Both experiments reached 10/fb today. Compared to the plan they pushed from 2 weeks behind end of may to 3 weeks in front the projection.http://lhc-commissioning.web.cern.ch/lhc-commissioning/images/2016/lumi-proj-16-27June.png What can we expect for the year and run 2? Optimistic would be something...
by sciing
Tue Jun 28, 2016 7:43 am
Forum: The Accelerator
Topic: What are the current records for LHC fills?
Replies: 45
Views: 12441

Re: What are the current records for LHC fills?

All records in one fill, longest fill after 37h operator dump. Finally 737/pb for ATLAS and 710/pb for CMS. Ini Lumi see above.
by sciing
Mon Jun 27, 2016 7:31 am
Forum: The Accelerator
Topic: What are the current records for LHC fills?
Replies: 45
Views: 12441

Re: What are the current records for LHC fills?

New lumi record, Atlas 1.08 e34, design target reached.