Search found 159 matches

by Danny252
Sat Mar 06, 2010 6:38 pm
Forum: The Accelerator
Topic: Older Events and discussion 3/22/10
Replies: 156
Views: 29844

Re: ** Current Events and discussion **

I remember either a topic or a discussion on chat regarding the effect of the ATLAS/CMS/etc. magnets on the beam. The 0900 meeting today mentions some small corrections to B2 with regards to the CMS magnet going on - but no noticable change to B1. I'm sure it'll interest whoever I was chatting with ...
by Danny252
Sat Mar 06, 2010 6:35 pm
Forum: The Accelerator
Topic: 2010 Briefings, Schedules and Problems
Replies: 48
Views: 11264

Re: 2010 Briefings, Schedules and Problems

Sat 1700: Early morning on Sunday 7 March: LHC re-start with beam - Perform beam checks (basic parameters) 07:00 – 13:00 : Injection and beam dump studies 13:00 – 23:00 : Collimator setting-up – BLM 23:00 - 07:00 : Damper setting-up Apparently Cryo is being silly and needs some work until tomorrow, ...
by Danny252
Thu Mar 04, 2010 5:05 pm
Forum: The Accelerator
Topic: Older Events and discussion 3/22/10
Replies: 156
Views: 29844

Re: ** Current Events and discussion **

Blue generally indicates "Status Unknown" - the TED indicators on Page 1 go blue when moving because "when they were only halfway up, they were neither up nor down", as the song goes (oh aren't I witty!)
by Danny252
Thu Mar 04, 2010 5:01 pm
Forum: The Accelerator
Topic: 2010 Briefings, Schedules and Problems
Replies: 48
Views: 11264

Re: 2010 Briefings, Schedules and Problems

1700 Meeting has a monster timetable! Thursday •20:00 : LHC ready to take beam ? •20:00 –24:00: Hump and He flow •Overnight: beta beating measurements and correction IR2, IR3, IR8 Friday 05/03/2010 •07:00 – 11:00 : Establishing reference orbit – “golden” + intck BPM Pt 6 •11:00 – 24:00 : Switching o...
by Danny252
Wed Mar 03, 2010 10:12 pm
Forum: The Accelerator
Topic: Older Events and discussion 3/22/10
Replies: 156
Views: 29844

Re: ** Current Events and discussion **

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 a...
by Danny252
Wed Mar 03, 2010 10:09 pm
Forum: The Accelerator
Topic: 2010 Briefings, Schedules and Problems
Replies: 48
Views: 11264

Re: 2010 Briefings, Schedules and Problems

I was wondering if it might be something like that. 1700 Meeting: 21:00 –02:00 : Injection studies 02:00 –03: 00 : ALICE : beam on the TDI –5e9 03:00 –07:00 : Systematic hump investigation Thursday: 07:00 –15:00 : HWC tests 15:00 –23:00 : Hump investigation continued –cryogenics tests for hump Overn...
by Danny252
Wed Mar 03, 2010 6:04 pm
Forum: Portal link and forum suggestions
Topic: Issues with Firefox 3.6?
Replies: 7
Views: 2874

Re: Issues with Firefox 3.6?

Updated it just to check for you ;)
by Danny252
Wed Mar 03, 2010 4:53 pm
Forum: Portal link and forum suggestions
Topic: Issues with Firefox 3.6?
Replies: 7
Views: 2874

Re: Issues with Firefox 3.6?

Nope, not broken the site for me.
by Danny252
Wed Mar 03, 2010 4:25 pm
Forum: The Accelerator
Topic: 2010 Briefings, Schedules and Problems
Replies: 48
Views: 11264

Re: 2010 Briefings, Schedules and Problems

0830 Info: Wednesday Schedule: 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 s...
by Danny252
Wed Mar 03, 2010 4:20 pm
Forum: The Accelerator
Topic: The Hump
Replies: 20
Views: 7905

Re: The Hump

Actually, the log I nabbed the image from noted both as humps - and if you look closely, it is 3 humps with 1 between the diamonds. B2 hump reference one hump in V at 0.21 and another 0.305 .below the vertical tune. no hump visible in H EDIT: Actually, looking at today's hump pics, I'm wondering if ...
by Danny252
Tue Mar 02, 2010 11:05 pm
Forum: The Accelerator
Topic: The Hump
Replies: 20
Views: 7905

Re: The Hump

Insert 1 complicated diagram of the hump(s) here.
by Danny252
Tue Mar 02, 2010 7:37 pm
Forum: The Accelerator
Topic: 2010 Briefings, Schedules and Problems
Replies: 48
Views: 11264

Re: 2010 Briefings, Schedules and Problems

1730 Briefing: 17:00 -? Recovered 17:00 –19:00 : Pre-cycle for sectors 45 -56-67 -78 –81 and BIC, Dumped beam event problem investigation 19:00 –21:00 : re-establish beam in the LHC 21:00 –evening: Systematic beam 2 and beam 1 measurements and corrections Over night : Beta beat measurements Introduc...
by Danny252
Tue Mar 02, 2010 6:33 pm
Forum: The Accelerator
Topic: Older Events and discussion 3/22/10
Replies: 156
Views: 29844

Re: ** Current Events and discussion **

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...
by Danny252
Tue Mar 02, 2010 2:03 pm
Forum: The Accelerator
Topic: 2010 Briefings, Schedules and Problems
Replies: 48
Views: 11264

2010 Briefings, Schedules and Problems

Those of you here last year may remember my collection and interpretation of the daily meetings/schedules at CERN, so why not do so again this year? :) I'm currently going on the 0830/1700 meeting presentations, linked to under "Progress" on the Portal. -- Tues 2 Mar: 03:00: Recovered from cryogenic...
by Danny252
Tue Mar 02, 2010 1:53 pm
Forum: The Accelerator
Topic: The Hump
Replies: 20
Views: 7905

Re: The Hump

Tau wrote:The fact that it moves around signifies that the oscillation comes from the outside.
Which would explain the table on Page 8 of the link in the first post, with the turning off of various possible influences and comparing the hump (or lack of) when these happen.