Collider status reports on-line

If you want to see electronics hardware customized for the collider
at CERN, use this link
https://indico.cern.ch/event/835603/contributions/3502849/attachments/1905359/3147173/Status_Report_on_the_Accelerator_Complex_-_LS2_activities_Septemebr2019_3.pdf

The Large Hadron Collider uses big diodes in color photos.
Many images of September 2019 status report on magnets and wiring
cleanliness.
The .pdf file says, "High voltage specialists (EN-EL and Contractors) will be fully available during the period with a single source to minimize downtime."

See a billion dollars of shiny lab electronics and vacuum kit.
Many status reports are up to date for your reading about
electromagnetic accelerators.

 

[Winfield Hill]

omnilobe@gmail.com wrote...

The Large Hadron Collider uses big diodes in color photos.

What can you tell us about the big diodes?


--
Thanks,
- Win

 

[Jan Panteltje]

On a sunny day (Thu, 24 Oct 2019 19:50:19 -0700 (PDT)) it happened
omnilobe@gmail.com wrote in
<0762256c-11a1-496e-a294-82285ed07269@googlegroups.com>:

If you want to see electronics hardware customized for the collider
at CERN, use this link
https://indico.cern.ch/event/835603/contributions/3502849/attachments/1905359/3147173/Status_Report_on_the_Accelerator_Complex_-_
LS2_activities_Septemebr2019_3.pdf

The Large Hadron Collider uses big diodes in color photos.
Many images of September 2019 status report on magnets and wiring
cleanliness.
The .pdf file says, "High voltage specialists (EN-EL and Contractors) will be fully available during the period with a single
source to minimize downtime."

See a billion dollars of shiny lab electronics and vacuum kit.
Many status reports are up to date for your reading about
electromagnetic accelerators.

It does not do anything for anybody ,
is just an industrial job creation project
pollutes the environment by using insane amounts of power.

My cure:
cut budget if nothing useful comes out in a year.
And with useful I do not mean a silly piece of paper with equations
that claim to be the TOE (Theory Of Everything).

Only thing useful that ever came from CERN was a hobby project called 'html'.

I want
replicator
warp drive
tractor beam
free clean energy
better weapon, death star comes to mind (that is why all the investment started,
make a better weapon than the A-bomb H-bomb).
..
OTOH those tunnels probably make good bomb shelters.

Greetings
Darth

 

[Bill Sloman]

On Friday, October 25, 2019 at 5:36:04 PM UTC+11, Jan Panteltje wrote:

On a sunny day (Thu, 24 Oct 2019 19:50:19 -0700 (PDT)) it happened
omnilobe@gmail.com wrote in
0762256c-11a1-496e-a294-82285ed07269@googlegroups.com>:

If you want to see electronics hardware customized for the collider
at CERN, use this link
https://indico.cern.ch/event/835603/contributions/3502849/attachments/1905359/3147173/Status_Report_on_the_Accelerator_Complex_-_
LS2_activities_Septemebr2019_3.pdf

The Large Hadron Collider uses big diodes in color photos.
Many images of September 2019 status report on magnets and wiring
cleanliness.
The .pdf file says, "High voltage specialists (EN-EL and Contractors) will be fully available during the period with a single
source to minimize downtime."

See a billion dollars of shiny lab electronics and vacuum kit.
Many status reports are up to date for your reading about
electromagnetic accelerators.

It does not do anything for anybody ,

It did find the Higgs boson, and seems to be picking out pentaquarks.

https://en.wikipedia.org/wiki/Pentaquark

Jan doesn't know about this kind of stuff, and dismisses what he can't be bothered to try to understand. It's silly, but we've got a few similar people posting here.

<snipped more inanity>

--
Bill Sloman, Sydney

-

 

[Piotr Wyderski]

Jan Panteltje wrote:

And with useful I do not mean a silly piece of paper with equations
that claim to be the TOE (Theory Of Everything).

ToE is not an issue, the problem is we are at the ToA stage: Teory of
Anything.

Best regards, Piotr

 

[Jeroen Belleman]

Winfield Hill wrote:

omnilobe@gmail.com wrote...
The Large Hadron Collider uses big diodes in color photos.

What can you tell us about the big diodes?

The LHC superconducting bending magnets are arranged in series
strings of 154 powered by a single 13kA power supply. In the
event of a quench of one of the magnets, the diodes divert the
current around it while the whole string is ramped down.

They are bespoke 75mm diameter diffusion-type diodes. They
are clamped between two heat sinks and are kept at liquid
helium temperature.

Jeroen Belleman

 

[Winfield Hill]

Jeroen Belleman wrote...

Winfield Hill wrote:
omnilobe@gmail.com wrote...
The Large Hadron Collider uses big diodes in color photos.

What can you tell us about the big diodes?

The LHC superconducting bending magnets are arranged in series
strings of 154 powered by a single 13kA power supply. In the
event of a quench of one of the magnets, the diodes divert the
current around it while the whole string is ramped down.

They are bespoke 75mm diameter diffusion-type diodes. They
are clamped between two heat sinks and are kept at liquid
helium temperature.

Thanks, Jeroen. Any idea what their forward voltage drop is,
during the 13kA quenching event? Are the wire connections
between bending magnets, and return path, also superconducting?


--
Thanks,
- Win

 

[Bill Sloman]

On Friday, October 25, 2019 at 7:10:10 PM UTC+11, Piotr Wyderski wrote:

Jan Panteltje wrote:

And with useful I do not mean a silly piece of paper with equations
that claim to be the TOE (Theory Of Everything).

ToE is not an issue, the problem is we are at the ToA stage: Theory of
Anything.

My wife brings home Physics Today every month (which is bizarre) and every now and then some physicist talks about his or her candidate for the Theory of Something.

They seem to spend most of their efforts trying to prove that the the theory is coherent. Only when they can persuade their colleagues that their theory is self-consistent is anybody prepared to start scheduling experiments on expensive hardware to find out of theory explains anything that happens in the real world world (to the extent that the insides of the Large Hadron Collider,or the remoter parts of the universe are parts of the real world)..

--
Bill Sloman, sydney

 

[Jeroen Belleman]

Winfield Hill wrote:

Jeroen Belleman wrote...
Winfield Hill wrote:
omnilobe@gmail.com wrote...
The Large Hadron Collider uses big diodes in color photos.
What can you tell us about the big diodes?
The LHC superconducting bending magnets are arranged in series
strings of 154 powered by a single 13kA power supply. In the
event of a quench of one of the magnets, the diodes divert the
current around it while the whole string is ramped down.

They are bespoke 75mm diameter diffusion-type diodes. They
are clamped between two heat sinks and are kept at liquid
helium temperature.

Thanks, Jeroen. Any idea what their forward voltage drop is,
during the 13kA quenching event? Are the wire connections
between bending magnets, and return path, also superconducting?

The forward voltage during a quench is of the order of 6V,
dropping rapidly as the diode heats up.

The interconnections between the magnets are also super-
conducting. They are soldered with a SnAg alloy. A failure
in one of those is what set us back a year in 2009.

Jeroen Belleman

 

[DemonicTubes]

On Friday, October 25, 2019 at 12:36:04 AM UTC-6, Jan Panteltje wrote:

> Only thing useful that ever came from CERN was a hobby project called 'html'.

KiCAD is pretty neat.

Not that it started there, but it wasn't usable professionally (IMHO) until they got involved and rewrote it a few years ago.

 

[Winfield Hill]

Jeroen Belleman wrote...

Winfield Hill wrote:
Jeroen Belleman wrote...
Winfield Hill wrote:
omnilobe@gmail.com wrote...

The Large Hadron Collider uses big diodes in color photos.
What can you tell us about the big diodes?
The LHC superconducting bending magnets are arranged in series
strings of 154 powered by a single 13kA power supply. In the
event of a quench of one of the magnets, the diodes divert the
current around it while the whole string is ramped down.

They are bespoke 75mm diameter diffusion-type diodes. They
are clamped between two heat sinks and are kept at liquid
helium temperature.

Thanks, Jeroen. Any idea what their forward voltage drop is,
during the 13kA quenching event?

The forward voltage during a quench is of the order of 6V,
dropping rapidly as the diode heats up.

Does the diode have a part number and datasheet?


--
Thanks,
- Win

 

[Jeroen Belleman]

Winfield Hill wrote:

Jeroen Belleman wrote...
Winfield Hill wrote:
Jeroen Belleman wrote...
Winfield Hill wrote:
omnilobe@gmail.com wrote...
The Large Hadron Collider uses big diodes in color photos.
What can you tell us about the big diodes?
The LHC superconducting bending magnets are arranged in series
strings of 154 powered by a single 13kA power supply. In the
event of a quench of one of the magnets, the diodes divert the
current around it while the whole string is ramped down.

They are bespoke 75mm diameter diffusion-type diodes. They
are clamped between two heat sinks and are kept at liquid
helium temperature.
Thanks, Jeroen. Any idea what their forward voltage drop is,
during the 13kA quenching event?
The forward voltage during a quench is of the order of 6V,
dropping rapidly as the diode heats up.

Does the diode have a part number and datasheet?

I never saw one, but I'm pretty remote from those activities.
I know that it was specially made for CERN by Dynex
Semiconductor Ltd in the UK <https://www.dynexsemi.com>.

I'll ask someone in the know...

Jeroen Belleman

 

[Dimiter_Popoff]

On 10/25/2019 10:42, Bill Sloman wrote:

On Friday, October 25, 2019 at 5:36:04 PM UTC+11, Jan Panteltje wrote:
On a sunny day (Thu, 24 Oct 2019 19:50:19 -0700 (PDT)) it happened
omnilobe@gmail.com wrote in
0762256c-11a1-496e-a294-82285ed07269@googlegroups.com>:

If you want to see electronics hardware customized for the collider
at CERN, use this link
https://indico.cern.ch/event/835603/contributions/3502849/attachments/1905359/3147173/Status_Report_on_the_Accelerator_Complex_-_
LS2_activities_Septemebr2019_3.pdf

The Large Hadron Collider uses big diodes in color photos.
Many images of September 2019 status report on magnets and wiring
cleanliness.
The .pdf file says, "High voltage specialists (EN-EL and Contractors) will be fully available during the period with a single
source to minimize downtime."

See a billion dollars of shiny lab electronics and vacuum kit.
Many status reports are up to date for your reading about
electromagnetic accelerators.

It does not do anything for anybody ,

It did find the Higgs boson, and seems to be picking out pentaquarks.

https://en.wikipedia.org/wiki/Pentaquark

Jan doesn't know about this kind of stuff, and dismisses what he can't be bothered to try to understand. It's silly, but we've got a few similar people posting here.

snipped more inanity

Well his wish list did not sound all bad, though his cry "we're fine as
we are in our caves" was clearly not that well thought (such a cry is
untypical of him AFAIK).

OTOH those at CERN have yet to locate the best DSP MCAs for gamma
spectrometry, they have been on the market for years .

Dimiter

======================================================
Dimiter Popoff, TGI http://www.tgi-sci.com
======================================================
http://www.flickr.com/photos/didi_tgi/

 

[Jeroen Belleman]

On 2019-10-25 16:07, Winfield Hill wrote:

Jeroen Belleman wrote...

Winfield Hill wrote:
Jeroen Belleman wrote...
Winfield Hill wrote:
omnilobe@gmail.com wrote...

The Large Hadron Collider uses big diodes in color photos.
What can you tell us about the big diodes?
The LHC superconducting bending magnets are arranged in series
strings of 154 powered by a single 13kA power supply. In the
event of a quench of one of the magnets, the diodes divert the
current around it while the whole string is ramped down.

They are bespoke 75mm diameter diffusion-type diodes. They
are clamped between two heat sinks and are kept at liquid
helium temperature.

Thanks, Jeroen. Any idea what their forward voltage drop is,
during the 13kA quenching event?

The forward voltage during a quench is of the order of 6V,
dropping rapidly as the diode heats up.

Does the diode have a part number and datasheet?

I had an exchange with the guys working with these things.
They say it's similar to the Dynex DS2101SY for which they
gave me a data sheet. I can't seem to find it on Dynex's
site, but I have a copy here:
<http://cern.ch/jeroen/tmp/DYNEX_DS2101SY.pdf> (97kB).

Jeroen Belleman

 

[whit3rd]

On Thursday, October 24, 2019 at 11:36:04 PM UTC-7, Jan Panteltje wrote:

On a sunny day (Thu, 24 Oct 2019 19:50:19 -0700 (PDT)) it happened
omnilobe@gmail.com wrote in
0762256c-11a1-496e-a294-82285ed07269@googlegroups.com>:

If you want to see electronics hardware customized for the collider
at CERN ...

It does not do anything for anybody ,

My cure:
cut budget if nothing useful comes out in a year.

So, the transistor was discovered in 1947, and the first useful commerial
items appeared 1953

> And with useful I do not mean a silly piece of paper with equations

.... the first useful equations (Shockley's contributioin) were available about 1950
for what we now call a transistor (not the point-contact type that was discovered, but
a 'normal' BJT).

What you call a 'cure', I'd call a 'disease'. At least you might wait for
four quarters, some businesses don't.

Other long-term developments: Democritus' atomic theory explaining Dalton's work with
gases, and Lilianfeld's 1925 description of the FET that came about 1960...

 

[Jan Panteltje]

On a sunny day (Fri, 25 Oct 2019 19:10:55 -0700 (PDT)) it happened whit3rd
<whit3rd@gmail.com> wrote in
<ae310cd2-a5ce-4287-b245-21ea874449cb@googlegroups.com>:

On Thursday, October 24, 2019 at 11:36:04 PM UTC-7, Jan Panteltje wrote:
On a sunny day (Thu, 24 Oct 2019 19:50:19 -0700 (PDT)) it happened
omnilobe@gmail.com wrote in
0762256c-11a1-496e-a294-82285ed07269@googlegroups.com>:

If you want to see electronics hardware customized for the collider
at CERN ...

It does not do anything for anybody ,

My cure:
cut budget if nothing useful comes out in a year.

So, the transistor was discovered in 1947, and the first useful commerial
items appeared 1953

And with useful I do not mean a silly piece of paper with equations

... the first useful equations (Shockley's contributioin) were available about 1950
for what we now call a transistor (not the point-contact type that was discovered, but
a 'normal' BJT).

What you call a 'cure', I'd call a 'disease'. At least you might wait for
four quarters, some businesses don't.

Other long-term developments: Democritus' atomic theory explaining Dalton's work with
gases, and Lilianfeld's 1925 description of the FET that came about 1960...

LOL
I have written back in sci.phisicks when it was still on topic:
"If you cannot do it with those small particles on the table top,
then you cannot do it in a machine the size of the universe."

A few years later a table top accelerator was designed that could do more than CERN at that time.

It is a folly, much like RF radio transmitters made with rotating multi-pole generators...
It is a keep busy project for kids from school who are good at
reciting Einstein and mathematicians good in dividing by zero and renormalisation.
No reality.
The nuculear bomba was found on the kitchen table top Madame Curie..
Read history.

Anytime such a thing happens stupidity goes BIG.
How I know, I worked at and designed part of an accelerator, small part but never the less.
Great place to work, and play, we could use some percentage of our time for own projects.

A family member was in command there before, he told me as a kid:
'that never leads to anything', he left and went into business...
I did not believe him then, but I do now.

Anyway the pay was shit, I needed more, got a better offer, and left, then later started my own business,
history repeated itself?
After a few years I did read in the paper the whole place there got contaminated...
PrOBabLy ALwaYs wAS

Mamathegissions usually claim everything,
but in reality most things are discovered by accident or pure insight of the neural net
Now we see a movement back to AI and those are even used to create new medicines.
I predict some AI will discover math, and there you are again, full circle.

There are more examples of go big no result projects: ITER .. NASA ;-) LOL
US come to think of it...
grin

Greetings Darth

 

[Bill Sloman]

On Saturday, October 26, 2019 at 5:34:20 PM UTC+11, Jan Panteltje wrote:

On a sunny day (Fri, 25 Oct 2019 19:10:55 -0700 (PDT)) it happened whit3rd
whit3rd@gmail.com> wrote in
ae310cd2-a5ce-4287-b245-21ea874449cb@googlegroups.com>:

On Thursday, October 24, 2019 at 11:36:04 PM UTC-7, Jan Panteltje wrote:
On a sunny day (Thu, 24 Oct 2019 19:50:19 -0700 (PDT)) it happened
omnilobe@gmail.com wrote in
0762256c-11a1-496e-a294-82285ed07269@googlegroups.com>:

No reality.
The nuculear bomba was found on the kitchen table top Madame Curie..
Read history.

Jan needs to read history more carefully. Pierre and Marie Curie processed a ton of pitchblende ore (which they'd been given for free by the Austrian government) before they got enough radium and polonium to run experiments on.

They did get some help, so more than one kitchen table was involved

The nuclear bomb came up quite a lot later, after both the Curies were dead.. Maria didn't die until 1934, and while "The German chemist Ida Noddack notably suggested in print in 1934 that instead of creating a new, heavier element 93, that 'it is conceivable that the (uranium) nucleus breaks up into several large fragments.' but Noddack's conclusion was not pursued at the time."

> Anytime such a thing happens stupidity goes BIG.

Jan is into big stupidity.

How I know, I worked at and designed part of an accelerator, small part but never the less.
Great place to work, and play, we could use some percentage of our time for own projects.

A family member was in command there before, he told me as a kid:
'that never leads to anything', he left and went into business...
I did not believe him then, but I do now.

The same kind of brain failure has set in with you too.

Anyway the pay was shit, I needed more, got a better offer, and left, then later started my own business,
history repeated itself?
After a few years I did read in the paper the whole place there got contaminated...
Probably always was.

But not enough to matter.

Mamathegissions usually claim everything,
but in reality most things are discovered by accident or pure insight of the neural net. Now we see a movement back to AI and those are even used to create new medicines.
I predict some AI will discover math, and there you are again, full circle.

Jan does spend a lot of time admiring his own insights.

Nobody else is going to bother.

There are more examples of go big no result projects: ITER .. NASA ;-) LOL
US come to think of it...
grin

No results that Jan can understand, or even comprehend.

--
Bill Sloman, Sydney

 

[Winfield Hill]

Jeroen Belleman wrote...

Winfield Hill wrote:
Jeroen Belleman wrote...
Winfield Hill wrote:
Jeroen Belleman wrote...
Winfield Hill wrote:
omnilobe@gmail.com wrote...

The Large Hadron Collider uses big diodes in color photos.
What can you tell us about the big diodes?
The LHC superconducting bending magnets are arranged in series
strings of 154 powered by a single 13kA power supply. In the
event of a quench of one of the magnets, the diodes divert the
current around it while the whole string is ramped down.

They are bespoke 75mm diameter diffusion-type diodes. They
are clamped between two heat sinks and are kept at liquid
helium temperature.

Thanks, Jeroen. Any idea what their forward voltage drop is,
during the 13kA quenching event?

The forward voltage during a quench is of the order of 6V,
dropping rapidly as the diode heats up.

Does the diode have a part number and datasheet?

I had an exchange with the guys working with these things.
They say it's similar to the Dynex DS2101SY for which they
gave me a data sheet. I can't seem to find it on Dynex's
site, but I have a copy here:
http://cern.ch/jeroen/tmp/DYNEX_DS2101SY.pdf> (97kB).

Very interesting, 113mm dia, 79kA peak capacity. I don't
suppose it needs much reverse-voltage capability?

Jeroen Belleman

--
Thanks,
- Win

 

[Winfield Hill]

Martin Riddle wrote...

Winfield Hill wrote:
Jeroen Belleman wrote...
Winfield Hill wrote:
Jeroen Belleman wrote...
Winfield Hill wrote:
Jeroen Belleman wrote...
Winfield Hill wrote:
omnilobe@gmail.com wrote...

The Large Hadron Collider uses big diodes in color photos.
What can you tell us about the big diodes?
The LHC superconducting bending magnets are arranged in series
strings of 154 powered by a single 13kA power supply. In the
event of a quench of one of the magnets, the diodes divert the
current around it while the whole string is ramped down.

They are bespoke 75mm diameter diffusion-type diodes. They
are clamped between two heat sinks and are kept at liquid
helium temperature.

Thanks, Jeroen. Any idea what their forward voltage drop is,
during the 13kA quenching event?

The forward voltage during a quench is of the order of 6V,
dropping rapidly as the diode heats up.

Does the diode have a part number and datasheet?

I had an exchange with the guys working with these things.
They say it's similar to the Dynex DS2101SY for which they
gave me a data sheet. I can't seem to find it on Dynex's
site, but I have a copy here:
http://cern.ch/jeroen/tmp/DYNEX_DS2101SY.pdf> (97kB).

Very interesting, 113mm dia, 79kA peak capacity. I don't
suppose it needs much reverse-voltage capability?

https://ocem.eu/en/project/particle-cern-lhc-quadrupole-dipole-diode-stacks-3/

OK, I see that, but with the low voltage drop (zero) of
a superconducting magnet, why would they need a multi-kV
reverse rating? To handle ringing after snap-off?


--
Thanks,
- Win

 

[Martin Riddle]

On 26 Oct 2019 04:42:49 -0700, Winfield Hill <winfieldhill@yahoo.com>
wrote:

Jeroen Belleman wrote...

Winfield Hill wrote:
Jeroen Belleman wrote...
Winfield Hill wrote:
Jeroen Belleman wrote...
Winfield Hill wrote:
omnilobe@gmail.com wrote...

The Large Hadron Collider uses big diodes in color photos.
What can you tell us about the big diodes?
The LHC superconducting bending magnets are arranged in series
strings of 154 powered by a single 13kA power supply. In the
event of a quench of one of the magnets, the diodes divert the
current around it while the whole string is ramped down.

They are bespoke 75mm diameter diffusion-type diodes. They
are clamped between two heat sinks and are kept at liquid
helium temperature.

Thanks, Jeroen. Any idea what their forward voltage drop is,
during the 13kA quenching event?

The forward voltage during a quench is of the order of 6V,
dropping rapidly as the diode heats up.

Does the diode have a part number and datasheet?

I had an exchange with the guys working with these things.
They say it's similar to the Dynex DS2101SY for which they
gave me a data sheet. I can't seem to find it on Dynex's
site, but I have a copy here:
http://cern.ch/jeroen/tmp/DYNEX_DS2101SY.pdf> (97kB).

Very interesting, 113mm dia, 79kA peak capacity. I don't
suppose it needs much reverse-voltage capability?

Jeroen Belleman

In the industrial sector, power generation, rail, etc. They usually
stack the 'pucks'.
fyi, Semikron is another mfg in this scetor

Cheers