[sts9fan]

No fighting over sextupoles.

[JohnR]

I used to be a particle physicist... but then I disintegrated into my constituent parts.

[*Scotty*]

John, don't forget to multiply any build or repair time by a factor of 4.
Scotty

[jneutron]

John, don't forget to multiply any build or repair time by a factor of 4.
Scotty

Hmmmm...sombody's an optimist..

I hope the guys in Geneva used a good factor when they open their machine to fix their soldering..

Cheers, John

[geezer]

Well, lets see.

definition of particle physicist...

1.  Experimentalist:  thinks up weird things to build like muon rings, antiproton decellerators (sp), stochastic cooling, electron lenses, antimatter confinement magnets..  Discusses with me the absolute maximum capabilities of Niobium Ti, Niobium Tin, and HTS that I can use to fabricate magnets, then writes a specification that requires 1.5 times what I told him is possible with respect to short sample, and at least 2 times the field quality I 've been able to achieve.  The lesson learned when dealing with an experimentalist:  Tell him (her) that you can only do 50% of what you actually can do.  Then, you may actually be able to make what they need..

2.  Theorist:  again, thinks up weird things like muon rings and the such.  But I have no clue what they are doing anyway..when I ask them to explain, I regret it...bartender...more drinks..  But when we meet at happy hour, they are actually human..go figure.

3.  Subset, unknown pedigree..co-worker:  Designs superconducting magnets, measures field quality of everything...Has NO textbooks in his office, especially anything on e/m theory...  When asked why, the answer:  he starts with maxwell's equations and derives everything he needs..that way he knows it's correct..I can only trust him...The last derivation he did was 50 pages long..he asked me to review it, but halfway down the first page he started using symbols I never saw before..

4.  Subset, also unknown pedigree...also questionable as to "high energy", as I'm not sure if a 3 Gev e-beam light source (third generation) is high enough to qualify as "high energy"..Ya gots your lattice guys, ya gots your wiggler guys, ya gots your undulator guys, and ya gots your rad guys.

All I knows is..they tell me that historically speaking, 50% of the magnets in all the light sources built in the last decade or two were connected backwards..I think it has something to do with room temperature operation.  That's not what happened in the 4.5 kelvin thingy I was a small part of 14 years ago.. that is simply because it costs way too much to "de-weld" the cryostats to fix dipole, quad, or sextupole circuits..the bellows are shall we say, big time PITA's?
When it happened, I was also confused, as I'd never considered the fact that the beam current is reversed because it's an e-beam.  I just went with Tonagi's conventions, electrons travelling in the same direction attract..then went from there.  Course, I had to trust the lattice guys with focussing quads and sextupoles, they are not intuitivly obvious to me..
Well don't worry..I won't hold that against you...

Do any PAC conferences?

Cheers, John

PS...I'm sorry, I gotta call you on one specific thing.

Retired particle physicist???  Yah, right..  There is no such thing..at least, not on the east coast..

Well, you certainly taught me a lesson, but not what you intended.

[jneutron]

Well, you certainly taught me a lesson, but not what you intended.

My my, how cryptic..

edit:  btw, this was not a "lesson", why say that at all???

So, lets see.

I posted an answer to the OP explaining historically why current convention is opposite electron flow.

I described a situation where it really is confusing even to physicists, making light of it at the same time..

You "called me" on ever being in a room with particle physicists (which is a good thing actually, there are lots of posers out there).

I provided quite a bit more detail, as well as keeping it lighthearted.

And your response?  Denigration.

Sigh..  Every physicist I work with, play with, socialize with, and meet, is incredibly nice.  They never try to walk all over others using blustery comments such as yours.

I have to wonder why the attitude..I've not tried to demean you..so what gives?

Cheers, John