1fb/week?

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jmc2000
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1fb/week?

Post by jmc2000 » Mon May 21, 2012 4:03 pm

My god, there's a good chance of collecting 1/fb this week which took a month last year, and the plan in 2010 was they would collect this for the whole year in 2011.

Someone call me a doctor, I think I'm going to faint...

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DCWhitworth
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Re: 1fb/week?

Post by DCWhitworth » Mon May 21, 2012 8:20 pm

jmc2000 wrote:My god, there's a good chance of collecting 1/fb this week which took a month last year, and the plan in 2010 was they would collect this for the whole year in 2011.

Someone call me a doctor, I think I'm going to faint...
Actually I think they're going to need to get close to 1/fb week if they are going to hit their target for 2012.
DC

The LHC - One ring to rule them all !

jmc2000
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Re: 1fb/week?

Post by jmc2000 » Mon May 21, 2012 11:09 pm

DCWhitworth wrote: Actually I think they're going to need to get close to 1/fb week if they are going to hit their target for 2012.
I think the target is between 13-14/fb to either rule out or discover the Higgs, with an extra two months of running to achieve this if necessary. Running at last years L=3.5/nb/s which gave 500/pb/week, they estimated this would give 10/fb for 2012.

pcatom
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Re: 1fb/week?

Post by pcatom » Tue May 22, 2012 7:27 pm

Made 980pb-1 last week ... hopefully more this week

jmc2000
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Re: 1fb/week?

Post by jmc2000 » Tue May 22, 2012 9:01 pm

pcatom wrote:Made 980pb-1 last week ... hopefully more this week
I can imagine the team are very satisfied to be running at around 6/nb/s with stable beams over 40% of time and pushing 1/fb/week.

Once they have an idea of average beam time and efficiency over the next few weeks, will they continue to increase the bunch intensity as long as it doesn't affect efficiency too much?

pcatom
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Re: 1fb/week?

Post by pcatom » Wed May 23, 2012 7:22 pm

Will continue to adiabatically push up the bunch intensity - to around 1.6x10+11 ppb. We know we can do this without increasing the emittance from the injectors too much. but don't expect any jumps ... If 1.6 is reached you can expect 20% more lumi ... say 7x10+33. Unlikely to get much higher than that this year.

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