Search found 193 matches
- Tue Apr 06, 2010 1:02 pm
- Forum: Science
- Topic: Let's go hump hunting!
- Replies: 86
- Views: 117032
Re: Let's go hump hunting!
Good point Josch. I agree that it is important to allow all ideas to come through, even if they are wild. Even though I am pretty convinced the cause of the hump is in the tunnel (otherwise it would influence both beams, for example, not just one), I find it important to get as many ideas as possibl...
- Sun Apr 04, 2010 6:23 am
- Forum: The Accelerator
- Topic: Why is energy ramp-up/ramp-down so slow?
- Replies: 5
- Views: 11689
Re: Why is energy ramp-up/ramp-down so slow?
This is basic physics. The magnets are inductors. The main property of an inductor is that if you apply a voltage to them the current goes up or down. The higher the voltage, the fast the current goes up; the bigger the inductor, the slower. The arc magnets are very large inductors, and you cannot a...
- Sat Apr 03, 2010 9:48 pm
- Forum: The Accelerator
- Topic: COOL links
- Replies: 57
- Views: 84994
Another cool link for people waiting
Hi, I just found this cool link explaining how all the procedures (setup, commisioning, and so on) are developed: It is a programming language, adapted from a language called pnuts (which looks like Java). http://icalepcs2009.spring8.or.jp/abstract/pdf/THC003_TALK.PDF I imagine that the operators wr...
- Fri Apr 02, 2010 4:10 pm
- Forum: Science
- Topic: Let's go hump hunting!
- Replies: 86
- Views: 117032
Remember the facts
Although I think we mustn't immediately reject strange proposals, I find it unlikely that the ELF or LF has the behaviour of the hump: 2.6 to 3.7 kHz, slowly sweeping in frequency between the two in a time of 7 to 10 minutes. Also, I find it hard to believe the source would come from so far away, bu...
- Fri Apr 02, 2010 9:15 am
- Forum: Science
- Topic: Let's go hump hunting!
- Replies: 86
- Views: 117032
Re: Let's go hump hunting!
Good idea, maybe TIM http://www.cernlove.org/blog/2010/01/monorails/ has a microphone on it already.
- Fri Apr 02, 2010 7:49 am
- Forum: Science
- Topic: Let's go hump hunting!
- Replies: 86
- Views: 117032
Let's go hump hunting!
In a brief conversation with PCatom I found out that the hump is still bothering the operators, and that they're working hard to find it. :? My idea was to use our collective knowledge to help the CERN people to "hunt the hump". So, if you have an idea on what the hump could be, on how the cause of ...
- Fri Mar 26, 2010 7:32 am
- Forum: Controversial topics
- Topic: An open invitation to MagneticTrap and other theorists
- Replies: 6
- Views: 10859
Re: An open invitation to MagneticTrap and other theorists
I like the idea; I am still a believer in democracy, just because all other systems are worse. From the experience of Wikipedia, we see that although indeed there can be a lot of controversy, it will stabilize eventually. And indeed, we do need the concept of "operator", in order to stabilize things...
- Fri Mar 26, 2010 5:13 am
- Forum: End Of The World
- Topic: Where will the harm come?
- Replies: 7
- Views: 16281
No harm
It might be useful to observe this paragraph in context. - Wittgenstein had (how can I say this respectfully) problems with seeing the importance of math in relation to other facts of life. - Math indeed is not prefect, but there is no application of math (in the sense of bridges and so on) in real ...
- Thu Mar 25, 2010 6:29 pm
- Forum: The Accelerator
- Topic: What is the collimator?
- Replies: 5
- Views: 10961
Re: What is the collimator?
For cool movies of collimators in action and sounds of particles hitting them, see
http://lhc-collimation-project.web.cern ... movies.htm
http://lhc-collimation-project.web.cern ... movies.htm
- Mon Mar 22, 2010 7:27 am
- Forum: MoEDAL
- Topic: New experiment is coming online at the LHC
- Replies: 7
- Views: 23458
Re: New experiment is coming online at the LHC
I love the apparent simplicity of the experiment: just use plastic foil as wallpaper, and watch closely.
You cannot see how brilliant it is until you spend some time figuring out what they are doing.
You cannot see how brilliant it is until you spend some time figuring out what they are doing.
- Mon Mar 22, 2010 7:08 am
- Forum: The Accelerator
- Topic: Intensities
- Replies: 6
- Views: 9754
Re: Intensities
The short answer is: there are different ways to measure intensities (which is obviously hard in the first place). They have built several different instruments to do that, and these are not completely calibrated towards each other.
It was actually worse last year.
It was actually worse last year.
- Fri Mar 19, 2010 7:27 am
- Forum: The Accelerator
- Topic: 3.5 TeV accelleration ! WORLD RECORD !
- Replies: 20
- Views: 26530
Re: 3.5 TeV accelleration ! WORLD RECORD !
Yeah!
We can now hope for a few "accidental" collisions, but maybe they will delay the news for a good publicity moment.
We can now hope for a few "accidental" collisions, but maybe they will delay the news for a good publicity moment.
- Fri Mar 12, 2010 7:04 am
- Forum: The Accelerator
- Topic: Vacuum
- Replies: 11
- Views: 15647
Re: Vacuum and pressure differences
A am not a physicist, but I'll try to clarilfy with what I know. If I understand it correctly, the pressure differences between the different parts of the accelerator complex will probably not cause as much "wind" as intuition would suggest. I see two reasons for that: With so little molecules, ther...
- Thu Mar 11, 2010 8:12 pm
- Forum: The Accelerator
- Topic: Cryo intervention
- Replies: 3
- Views: 6453
Re: Cryo intervention
That means in plain English: "Fixing the fridge" That's all: "cryo" is short for "cryogenic system". You can imagine that it takes quite a lot of machinery to cool so much material to 1.9K. Most of the machines have to be close to the magnets: underground, that is. Since you can't go down when the m...
- Wed Mar 10, 2010 2:46 pm
- Forum: The Accelerator
- Topic: On the threshold of new territory
- Replies: 6
- Views: 10135
14 TeV delay: old news
The 14 TeV delay was news five weeks ago:
http://ow.ly/1grwX
It amazes me how slow the newspapers can be, sometimes.
http://ow.ly/1grwX
It amazes me how slow the newspapers can be, sometimes.