Search found 167 matches

by Tau
Thu Apr 08, 2021 6:37 am
Forum: The Accelerator
Topic: Magnet training is visible
Replies: 0
Views: 61

Magnet training is visible

Hi folks,
In the new year, the LHC is about to awaken.
You can see the magnet training activity on the cryo vistar at https://op-webtools.web.cern.ch/vistar/ ... p?usr=LHC2.
It is going to be interesting again...
- Tau
by Tau
Thu Apr 08, 2021 5:20 am
Forum: Science
Topic: CERN events public available online!
Replies: 1
Views: 47

CERN events public available online!

Hi folks, Even though it is very silent in here, I hope there are still folks interested: I just found out that the CERN events are available for everyone to see. You can find your favorite lecture at https://home.cern/events and all the zoom particulars are there. And there's a lot of other stuff g...
by Tau
Thu Mar 11, 2021 8:31 pm
Forum: The Accelerator
Topic: H- ions in the Linac 4: why this is so clever
Replies: 3
Views: 720

Re: H- ions in the Linac 4: why this is so clever

DCWhitworth wrote:
Thu Mar 11, 2021 2:59 pm
That is startlingly elegant ! Instead of changing the polarity of the magnet, you change the polarity of the beam.
And all you need is a very thin piece of carbon foil (I calculated 1 um from the article):
https://accelconf.web.cern.ch/IPAC10/pa ... peb030.pdf
by Tau
Thu Mar 11, 2021 1:37 pm
Forum: The Accelerator
Topic: H- ions in the Linac 4: why this is so clever
Replies: 3
Views: 720

H- ions in the Linac 4: why this is so clever

Hi, Stuff will be happening this year with the LHC, let's talk about it! :clap: I'll start here: I've been wondering about the strange concept of using H- ions in the Linac 4. :think: I found out that this is actually pretty clever! Even though it is harder to get an hydrogen atom to accept an extra...
by Tau
Thu Mar 11, 2021 11:32 am
Forum: New Users Start Here
Topic: Hello
Replies: 3
Views: 11279

Re: Hello

Well, the forum isn't very active lately, but this will change soon, I hope.
They are starting the whole accelerator chain this year.
by Tau
Thu Mar 11, 2021 11:29 am
Forum: The Accelerator
Topic: LINAC 4 Online !
Replies: 2
Views: 4182

Re: LINAC 4 Online !

Yes, everything is going live again. Exciting times to come this year. Yeah!
by Tau
Fri Feb 22, 2019 3:27 pm
Forum: Off topic
Topic: FCC CDR released
Replies: 3
Views: 7893

Re: FCC CDR released

Well, the soil composition isn't really as homogenous as needed, but well, it's something you can't really avoid: where are you going to find such a huge circle with the same ground composition for all of the circuit? Yes, and within a convenient distance of a multi TeV collider to start it up, of ...
by Tau
Tue Feb 05, 2019 12:37 pm
Forum: Off topic
Topic: Sad news
Replies: 4
Views: 11127

Re: Sad news

CharmQuark wrote:
Tue Jul 31, 2018 1:51 pm
Found out today that one of our members died in May, His nic on here was Chriwi.
That's pretty sad... Strange feeling to lose someone who you know in a way, but still don't know much about.
by Tau
Tue Sep 11, 2018 9:27 am
Forum: The Accelerator
Topic: LHC Timing system
Replies: 0
Views: 14090

LHC Timing system

I was reading an old document about the design of the LHC, and found it quite interesting: http://www.hephy.at/project/cms/trigger/globalTrigger/trans/MEDIEN/Publications/CMSdetector_JINST/Info_CMS_JINST/TTC-Taylor_LECC02.pdf This article, even though it contains a lot of technical details, was abso...
by Tau
Mon Sep 10, 2018 9:17 am
Forum: The Accelerator
Topic: Tenth anniversary of first beams in the LHC
Replies: 1
Views: 5895

Re: Tenth anniversary of first beams in the LHC

:occasion-birthday:
Happy birthday LHC!
You've done better than we expected...
by Tau
Sun Sep 09, 2018 7:32 pm
Forum: Science
Topic: AWAKE successfully accelerates electrons using plasma wakefield acceleration
Replies: 1
Views: 5768

Re: AWAKE successfully accelerates electrons using plasma wakefield acceleration

Now that is a quick way to accelerate an electron. Does any of you know if this trick also works for protons?
I guess the hard part is to make a plasma wave of something heavy enough to drive them...
by Tau
Mon Jun 18, 2018 5:28 am
Forum: The Accelerator
Topic: Start of major civil engineering work for the HL-LHC
Replies: 1
Views: 6194

Re: Start of major civil engineering work for the HL-LHC

Quite cool stuff they're doing there.
I am especially impressed by the record breaking 100 kA transmission lines.
That's some serious current not to be messed with.
by Tau
Tue Jun 05, 2018 8:37 am
Forum: Portal link and forum suggestions
Topic: Suggestion for main topic: HL-LHC
Replies: 0
Views: 23031

Suggestion for main topic: HL-LHC

Hi, Although there are not many people on this forum talking about this, it may be worth adding a new main topic for the HL-LHC. (See https://home.cern/topics/high-luminosity-lhc .) Now the first steps are being taken, there is a lot of stuff going on there. This would give room to discuss for examp...
by Tau
Tue Jun 05, 2018 6:51 am
Forum: The Accelerator
Topic: 2018 Operation
Replies: 78
Views: 72963

Re: 2018 Operation

Aha, so that causes unexpected dumps!
Looks a lot more plausible than birds dropping sandwiches in ventilation ducts https://cds.cern.ch/journal/CERNBulleti ... es/1221806 or a hump https://vixra.wordpress.com/2010/07/16/ ... erference/.
by Tau
Tue Jun 05, 2018 6:46 am
Forum: The Accelerator
Topic: The accelerator complex from the viewpoint of a proton
Replies: 1
Views: 6434

The accelerator complex from the viewpoint of a proton

Just a thought... If you are a proton flying through the accelerator complex, you see the world around you malformed by Lorentz contraction. This gives some interesting relativistic weirdness. Also, the time perception of the proton changes. (The computations below are based on the fact that a proto...