Search found 159 matches

by Danny252
Fri Dec 04, 2009 7:47 pm
Forum: The Accelerator
Topic: Weekend of 12-3-09 collision events !
Replies: 188
Views: 22910

Re: *** COLLISION ALERT ***

The Saturday collision has been retimed to 1700. All other details hold.
by Danny252
Fri Dec 04, 2009 4:02 pm
Forum: New Users Start Here
Topic: Hi, I am a gluon!
Replies: 8
Views: 1895

Re: Hi, I am a gluon!

Welcome to the site, and I'm glad you've enjoyed all the things on here :-)
by Danny252
Fri Dec 04, 2009 2:37 pm
Forum: The Accelerator
Topic: Daily Schedules and Hiccups
Replies: 41
Views: 10299

Re: Daily Schedules and Hiccups

Discussion topic for this quench: http://lhcportal.com/Forum/viewtopic.php?f=4&p=626 I'd like to keep this topic clean(ish) for the schedules and announcing problems - and keep discussion in specific topics (which helps people find all the info for either schedules or a specific problem in one place...
by Danny252
Fri Dec 04, 2009 2:34 pm
Forum: The Accelerator
Topic: Quench 1pm 4 Dec 2009
Replies: 6
Views: 2489

Re: Quench 1pm 4 Dec 2009

The Quenchino seems to have been Beam Induced - they've been playing around with the beam all morning to test the beam cleaning systems. Apparently they'd already lost parts of the beam due to hitting things already, and they finally managed to break something!

No major damage reported anywhere.
by Danny252
Fri Dec 04, 2009 2:06 pm
Forum: The Accelerator
Topic: Quench 1pm 4 Dec 2009
Replies: 6
Views: 2489

Re: Quench 1pm 4 Dec 2009

They've only been down 3 hours, so I'd agree it's rather minor. Better safe than sorry though!
by Danny252
Fri Dec 04, 2009 2:05 pm
Forum: The Accelerator
Topic: Daily Schedules and Hiccups
Replies: 41
Views: 10299

Re: Daily Schedules and Hiccups

COLLISIONS PLANNED THIS WEEKEND Schedule at: http://lhc-commissioning.web.cern.ch/lhc-commissioning/news/LHC-news.htm Saturday 1600 - 450 GeV Beam Collisions, Intensity of 4e9 Sunday 0000 - As Above Sunday 1400 - 450 GeV Beam Collisions, Intensity of 2e10 I believe the latter one will be the highest...
by Danny252
Fri Dec 04, 2009 2:02 pm
Forum: The Accelerator
Topic: old Alert 12/3/09
Replies: 3
Views: 2027

Re: *** Alert ***

450 GEV COLLISIONS PLANNED SATURDAY/SUNDAY Schedule at http://lhc-commissioning.web.cern.ch/lhc-commissioning/news/LHC-news.htm. Collisions at 450GeV are planned at: Saturday 1600 - 450 GeV Beam Collisions, Intensity of 4e9 Sunday 0000 - As Above Sunday 1400 - 450 GeV Beam Collisions, Intensity of ...
by Danny252
Fri Dec 04, 2009 1:58 pm
Forum: The Accelerator
Topic: Quench 1pm 4 Dec 2009
Replies: 6
Views: 2489

Re: Quench 1pm 4 Dec 2009

Progress page says:

07:30-12:00: Aperture studies continued. Stopped by beam-induced quench.

So possibly managed to smash a beam into something they shouldn't?
by Danny252
Fri Dec 04, 2009 1:56 pm
Forum: The Accelerator
Topic: Daily Schedules and Hiccups
Replies: 41
Views: 10299

Re: Daily Schedules and Hiccups

Friday Schedule (is probably out the window...) -- Comments: DC Whitworth managed to pick up on a quench in sector 23 not too long ago (1223 is the earliest mention of this). I've not been able to find much info, but the LHCb's logbook mentions electrical problems being looked into - I can't tell if...
by Danny252
Thu Dec 03, 2009 10:45 pm
Forum: The Accelerator
Topic: Progress Page
Replies: 0
Views: 2051

Progress Page

Recently, the guys at the LHC have revamped this page. It is now a nicely set out page, and they seem to be writing up the progress of events as they happen now. Also, they put up a PowerPoint display daily from what I assume is a meeting they have every morning (note it is Office 2007 format - howe...
by Danny252
Thu Dec 03, 2009 10:30 pm
Forum: The Accelerator
Topic: LHC@Home
Replies: 2
Views: 1014

Re: LHC@Home

From what I remember, it was used pre-LHC startup (the first one, that is ;)) to figure out stable beam paths or similar - so that they can calibrate the beams without mashing up their machinery the second they turn it on. Or something. But even back in early 2008 it was very quiet - I don't think t...
by Danny252
Thu Dec 03, 2009 9:48 pm
Forum: The Accelerator
Topic: Daily Schedules and Hiccups
Replies: 41
Views: 10299

Re: Daily Schedules and Hiccups

Thurs Night/Friday Morning: -- Comments: LBDS TSU - LHC Beam Dump System, Trigger Synchronisation Unit (mouthful or what?!). I think that this is a system that ensures the Beams are dumped together, or that the dumping system activates at the correct time. MPS - Machine protection system - a systems...
by Danny252
Thu Dec 03, 2009 4:43 pm
Forum: The Accelerator
Topic: Daily Schedules and Hiccups
Replies: 41
Views: 10299

Re: Daily Schedules and Hiccups

GREAT idea... I have turned this into a global thread... It will stay in the announcements. We will need to take the thread and store it away by date week by week and start a new one. Otherwise it will be come huge.. Great idea ! Thanks :) Thursday: -- Comments: More hardware testing, beam tuning, ...
by Danny252
Wed Dec 02, 2009 9:07 pm
Forum: The Accelerator
Topic: Daily Schedules and Hiccups
Replies: 41
Views: 10299

Re: Daily Schedules and Hiccups

Wednesday/Thursday: -- Comments: Beam is not yet back as of 2200 CERN time, but they're getting there. Collimator testing is almost done, and there's talk of higher intensities (NOT Power!). More hardware/beam testing/tuning planned in the morning. -- Evening: now 1h access to UA (svc area at pt6) t...
by Danny252
Wed Dec 02, 2009 6:10 pm
Forum: The Accelerator
Topic: What to ask the LHC team about its operations or displays
Replies: 25
Views: 5620

Re: What to ask the LHC team about its operations or displays

Tim Bergel wrote: 3. A description of 'where to go and what to look for' in order to get some sort of overview of what is going when collisions are happening. I'm guessing that once physics starts in earnest page 1 & status ops will become very repetitive.
Try: http://lhcportal.com/Forum/viewtopic.php?f=3&t=84