Older Events and discussion 3/22/10

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Harbles
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Re: ** Current Events and discussion **

Post by Harbles » Fri Feb 26, 2010 11:09 pm

Other than pesky PC and Cryo drop outs it looks like is going good. Filling Scheme alternate injection R1 R2 pilot from LHC_Config. So I think very soon 1st beams of 2010.

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LarryS
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Re: ** Current Events and discussion **

Post by LarryS » Sat Feb 27, 2010 12:18 am

PC problems plus an access is required ... NO BEAMS before 8h tomorrow

from Page 1

Harbles
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Re: ** Current Events and discussion **

Post by Harbles » Sat Feb 27, 2010 12:20 am

Mañana.

Harbles
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Re: ** Current Events and discussion **

Post by Harbles » Sat Feb 27, 2010 11:03 pm

More frustration with nQps. There is an enormous quantity of equipment that must all work correctly at the same time. If one considers the number of connection points and active components and power supplies in the nQps alone that have to work reliably it boggles the mind that it can work at all.
I hope they can find a root cause for the issues and correct it soon.

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March_Hare
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Re: ** Current Events and discussion **

Post by March_Hare » Sun Feb 28, 2010 8:34 am

Congrats to CERN for "first beam" (of 2010) last night.
Nothing travels faster than the speed of light with the possible exception of bad news, which obeys its own special laws.
~Douglas Adams

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CharmQuark
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Re: ** Current Events and discussion **

Post by CharmQuark » Sun Feb 28, 2010 1:52 pm

Well Done :D :thumbup:
Anyone who doesn't take truth seriously in small matters cannot be trusted with large ones either by Albert Einstein.

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jmayes
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Re: ** Current Events and discussion **

Post by jmayes » Sun Feb 28, 2010 4:51 pm

Dido!

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LarryS
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Re: ** Current Events and discussion **

Post by LarryS » Sun Feb 28, 2010 9:42 pm

For those of you that have not been following "Page 1" events, for the first time this year we had two beams (red and blue) circulating. Neither beam was stable but that will be the next step.

We are getting closer to collisions ...

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LarryS
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Re: ** Current Events and discussion **

Post by LarryS » Sun Feb 28, 2010 9:59 pm

Also, from midnight to noon the LHC will be down for something called "cryo intervention." Sounds like a polite and politically correct way of saying "we need to go in and hit something with a big hammer."

Historical Note:

Inthe early days of V2 rocket testing at White Sands, USA (circa 1948), this was known as "ball peene adjustment."

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March_Hare
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Re: ** Current Events and discussion **

Post by March_Hare » Sun Feb 28, 2010 10:09 pm

"we need to go in and hit something with a big hammer"
That depends. CCC might simply be out of ice-cream
:happy-jumpyellow: :happy-jumpyellow:
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Danny252
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Re: ** Current Events and discussion **

Post by Danny252 » Tue Mar 02, 2010 6:33 pm

Today so far:

Seem to have finally got stuff in 67 and 78 working and are ready to throw in some beams soon.

Also solved their Dump Event messages messing up - with what sounds like "Oops, we plugged in the wrong cable in the wrong place" - I know this major issue often occurs in Physics...

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jmayes
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Re: ** Current Events and discussion **

Post by jmayes » Wed Mar 03, 2010 2:03 am

Wow, just checked the charts and we actually had 2 beams up at once about an hour ago!!!

And at 3e9 intensity too!!!! It won't be long now :)
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jmayes
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Re: ** Current Events and discussion **

Post by jmayes » Wed Mar 03, 2010 4:51 am

Oh, Ya- it's a roller coaster ride but they are keeping both beams up!! :clap:
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PhilG
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Re: ** Current Events and discussion **

Post by PhilG » Wed Mar 03, 2010 8:30 am

Plan
Wednesday 03/03/2010 :
Until 9:00 : beta beating
09:00 -10:00 : Orbit study with 2 beams
10:00 –12:00 : Dump and Pre cycle –BLM intervention IR6 –RBAC activation
12:00 -15:00 : Re-establish beams and checks of parameters
15:00 -21:00 : Systematic hump investigation
21:00 –02:00 : Injection studies
02:00 –03: 00 : ALICE : beam on the TED
03:00 –09:00 : Aperture checks -tbc

Thursday 04/03/2010 Tentative :
07:00 –15:00 : HWC tests
15:00 –23:00 : Hump investigation continued
Overnight : beta beating measurements and correction

Danny252
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Re: ** Current Events and discussion **

Post by Danny252 » Wed Mar 03, 2010 10:12 pm

Today's interesting glitch was that RF turned off without anyone noticing, so the injected protons debunched and the euipment assumed there was no beam (and claimed it was lost). They injected twice more, before someone pointed out the intensity was getting quite high on one of the monitors, since all the protons were still in there! They dumped and sorted it out quickly enough once they worked out what had happened.

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