Search found 159 matches

by Danny252
Mon Mar 01, 2010 11:09 pm
Forum: The Accelerator
Topic: The Hump
Replies: 20
Views: 7976

The Hump

CERN has some fun names for problems apparently... It seems that the "Hump" is an unwanted oscilliation that's been observed since last year - and it sounded like some people were rather pissed off that it hadn't gone away after Christmas! It seems they're having a fun time trying to find the cause ...
by Danny252
Fri Feb 26, 2010 7:50 pm
Forum: New Users Start Here
Topic: What do the displays mean ?
Replies: 85
Views: 61366

Re: What do the displays mean ?

LHC Config seems to be mostly collision, tune, luminosity info and so forth. There's also some general info on the accelerator at the top, and what Harbles posted above. Accelerator Mode: Not sure if this means LHC as a whole, or just RF. Beam Mode: Fairly self explanatory I'd hope Active Filling Sc...
by Danny252
Wed Feb 24, 2010 2:51 pm
Forum: The Accelerator
Topic: Older Events and discussion 3/22/10
Replies: 156
Views: 30212

Re: ** Current Events and discussion **

Tuesday's Progress Report claims:

"Beam Thursday evening at the earliest."
by Danny252
Fri Feb 05, 2010 7:55 pm
Forum: The Accelerator
Topic: How good is 7 TeV
Replies: 3
Views: 1592

Re: How good is 7 TeV

Yes, 7 TeV will be a new record for power (LHC already holds that having surpassed the Tevatron).

And in theory, yes, it should reveal some new/more powerful physics :)
by Danny252
Fri Feb 05, 2010 7:50 pm
Forum: The Accelerator
Topic: 2010 Startup
Replies: 89
Views: 12670

Re: 2010 Startup

I would've thought they'd want to keep it a secret until they can make a big show and tell - or release it only just before to give visitors time to read it
by Danny252
Sat Jan 02, 2010 12:32 am
Forum: New Users Start Here
Topic: Shut down
Replies: 11
Views: 2398

Re: Shut down

Plus even scientists like Christmas/New Year's off ;-)
by Danny252
Fri Dec 18, 2009 3:33 pm
Forum: The Accelerator
Topic: OLDER 2/15/10 ** current events and discussion **
Replies: 54
Views: 14844

Re: ** current events and discussion **

Christmas isn't completely silent in CERN - today a fire alarm was set off in the LHC.

However, not to worry - after an investigation by a pair of firemen, it turns out that someone forgot they were doing welding down there!
by Danny252
Fri Dec 18, 2009 3:28 pm
Forum: Portal link and forum suggestions
Topic: LHCPortal.com in the news
Replies: 4
Views: 4611

Re: LHCPortal.com in the news

Not just El Reg (which brought me here) who have heard of us, either: 'Fan' helps make sense of world's biggest experiment (Nov 23, Toronto Star) ... Stephens' site (www.lhcportal.com) has now been up for seven days. It's already drawn nearly a quarter of a million page views ... http://www.thestar....
by Danny252
Tue Dec 15, 2009 3:07 pm
Forum: The Accelerator
Topic: OLDER 2/15/10 ** current events and discussion **
Replies: 54
Views: 14844

Re: ** current events and discussion **

Today's schedule implies a Ramp to 1.18TeV, squeezing and then collisions ("measurements"). These could well be 16x16 as well, just to be more exciting! Last night, the LHC reached what we believe is the highest intensity it has ever reached - 1.55/1.75e11 for the respective beams. They were collidi...
by Danny252
Tue Dec 15, 2009 3:05 pm
Forum: The Accelerator
Topic: Daily Schedules and Hiccups
Replies: 41
Views: 10700

Re: Daily Schedules and Hiccups

Tuesday's -- Comments: TOTEM/Roman Pots tests completed by time of posting. (1600 CERN Time). Ramp + Squeeze - 16x16? We'll have to watch! -- Morning: - Prepare 4x4 - Set up TOTEM Roman Pots, then take data, ~2h - Study abort gap cleaner Afternoon/evening: - Orbit feedback - Ramp, squeeze and machin...
by Danny252
Mon Dec 14, 2009 8:00 pm
Forum: The Accelerator
Topic: OLDER 2/15/10 ** current events and discussion **
Replies: 54
Views: 14844

Re: ** current events and discussion **

16x16 + Pilots now.

1.50E11 B1, 1.70E11 B2.

Image
by Danny252
Sat Dec 12, 2009 7:27 pm
Forum: The Accelerator
Topic: Why is one Beam Falling?
Replies: 6
Views: 2159

Re: Why is one Beam Falling?

Best suggestion in IRC is that some fills are just worse than others - and of course, they're always fiddling with buttons and switches to try and make it work better.
by Danny252
Sat Dec 12, 2009 6:55 pm
Forum: Portal link and forum suggestions
Topic: Refresh
Replies: 1
Views: 1108

Re: Refresh

To be fair, it's so rare that the links/title change it's not worth it - once a day at best, in all honesty.
by Danny252
Sat Dec 12, 2009 5:59 pm
Forum: The Accelerator
Topic: Daily Schedules and Hiccups
Replies: 41
Views: 10700

Re: Daily Schedules and Hiccups

Saturday's Timetable

--
Comments: Collisions and analying why B2 keeps falling is that?
--

- Continue stable beam collisions at 450 GeV, 2e10 p/bch,
4x4_c+shifted (no overinjection), review tomorrow morning.
- Try understanding beam life times.
- If possible, further transverse IP adjustments.
by Danny252
Sat Dec 12, 2009 12:01 am
Forum: The Accelerator
Topic: How much does it cost...
Replies: 6
Views: 2112

Re: How much does it cost...

Then again, surely they'll want incredibly high purity samples of Hydrogen (which I assume they want for protons) and Lead - that I know can cost a lot. But like you say, it is miniscule quantities.