Current Events Discussion

The place to discuss the LHC. Commissioning, operation, issues, events ....
scorpion
Posts: 9
Joined: Wed Dec 09, 2009 1:23 pm

Re: Current Events Discussion

Post by scorpion » Tue Mar 30, 2010 6:01 pm

I liked the quote from one of the boffins when he said 'we may even discover some unknown unknowns' :think: :D

User avatar
jmayes
Posts: 86
Joined: Sun Dec 06, 2009 4:46 pm
Location: USA

Re: Current Events Discussion

Post by jmayes » Thu Apr 01, 2010 1:20 am

New Record! Beam for over 8 hours and at 3.5TeV too!

JNW
Posts: 42
Joined: Wed Dec 02, 2009 4:48 pm

Re: Current Events Discussion

Post by JNW » Thu Apr 01, 2010 2:22 am

The beams are still going, and with good lifetimes, too!

And LHCb just had a bizarre event: http://lblogbook.cern.ch/Shift/100401_0 ... 4210_0.jpg

:shock:

User avatar
gronos
Posts: 11
Joined: Sun Feb 07, 2010 7:32 am

Re: Current Events Discussion

Post by gronos » Thu Apr 01, 2010 3:18 am

Whoops, beams gone. Hope there were some interesting collisions.
Rich Gronostajski
Center of Excellence in Bioinformatics and Life Sciences
University at Buffalo

User avatar
jmayes
Posts: 86
Joined: Sun Dec 06, 2009 4:46 pm
Location: USA

Re: Current Events Discussion

Post by jmayes » Thu Apr 01, 2010 4:58 am

I read around 10 hours, looks like a new record to me :clap: :dance:

Danny252
LHCPortal Guru
Posts: 169
Joined: Mon Nov 23, 2009 4:45 pm

Re: Current Events Discussion

Post by Danny252 » Fri Apr 02, 2010 2:11 pm

Seems like Cryo is rather borked again today. Page 1 says they intend to sort it out by 2000.

So whilst we wait, seems we'll be attempting to break Igor...

User avatar
CharmQuark
Site Admin
Posts: 1483
Joined: Fri Dec 04, 2009 2:22 am
Location: Berwick-Upon-Tweed (UK)

Re: Current Events Discussion

Post by CharmQuark » Fri Apr 02, 2010 2:18 pm

Danny252 wrote:Seems like Cryo is rather borked again today. Page 1 says they intend to sort it out by 2000.

So whilst we wait, seems we'll be attempting to break Igor...
hahaha :thumbup:
Anyone who doesn't take truth seriously in small matters cannot be trusted with large ones either by Albert Einstein.

Danny252
LHCPortal Guru
Posts: 169
Joined: Mon Nov 23, 2009 4:45 pm

Re: Current Events Discussion

Post by Danny252 » Fri Apr 02, 2010 2:55 pm

Danny252 wrote:by 2000.
2200 now!

Kasuha
Posts: 570
Joined: Tue Dec 15, 2009 1:22 pm

Re: Current Events Discussion

Post by Kasuha » Fri Apr 02, 2010 3:24 pm

No wonder, looks like parts of the machine had time to warm up a lot. Still too many red squares on cryo page.

Kasuha
Posts: 570
Joined: Tue Dec 15, 2009 1:22 pm

Re: Current Events Discussion

Post by Kasuha » Sat Apr 03, 2010 9:20 am

Today's morning dump was scary.

Shadowdraxx
LHCPortal Guru
Posts: 184
Joined: Fri Dec 04, 2009 1:03 am

Re: Current Events Discussion

Post by Shadowdraxx » Sat Apr 03, 2010 11:31 am

Kasuha wrote:Today's morning dump was scary.

how so mate?

Yesterdays Atlas fireworks were mad tho, nothing.... nothing.... BOOOOOOOOOOOOOOOOOOM tracks everywhere so much you couldn't make any sense lol

Kasuha
Posts: 570
Joined: Tue Dec 15, 2009 1:22 pm

Re: Current Events Discussion

Post by Kasuha » Sat Apr 03, 2010 5:28 pm

I was looking at page1 shortly after the beam was dumped and they put on beam tracking screens showing one beam mark in the center and one way off (by centimeters, not millimeters). Should this happen with full intensity beam I'd be afraid about beam pipes getting perforated by it.

User avatar
chriwi
LHCPortal Guru
Posts: 403
Joined: Fri Nov 20, 2009 1:19 pm
Location: Stuttgart Germany
Contact:

COLL-MOT-b2?

Post by chriwi » Sat Apr 03, 2010 8:19 pm

Now it is already the second time I see a dump during setting up for phzsics with the reason "COLL-MOT-..." while moving in the collimators.

What is that?
bye

chriwi

User avatar
LarryS
Posts: 100
Joined: Fri Dec 04, 2009 3:46 pm
Location: Seymour, CT, USA

Re: Current Events Discussion

Post by LarryS » Sat Apr 03, 2010 8:50 pm

Not sure if this will fully answer your question but from the "CERN BE - OP eLogbook"

Unprogrammed dump. When completing collimator sequence. TCT and TCLs were out of tollerance.

I have been (very slowly) putting together a spread-sheet of all the acronyms used on the various screens; I have the following defs ...

TCT - Target Collimator Tertiary: Tertiary Collimator

TCL - Target Collimator Long

Shadowdraxx
LHCPortal Guru
Posts: 184
Joined: Fri Dec 04, 2009 1:03 am

Re: Current Events Discussion

Post by Shadowdraxx » Sun Apr 04, 2010 3:17 pm

A nice little animation of "collapsing separation bumps" that is part of the beam physics process:

Enjoy:

http://cms.web.cern.ch/cms/News/e-comme ... ie2CMS.gif

Post Reply