On 3/27/26 21:29, Martin Brown wrote:
On 26/03/2026 22:36, Jeroen Belleman wrote:
On 3/26/26 17:55, Martin Brown wrote:
On 26/03/2026 10:38, Jeroen Belleman wrote:
No, there isn't enough to blow anything up, not even close..
If you're interested, it's possible to visit CERN:
<https://visit.cern>. There may be waiting lists. It's
very sought after. CERN welcomes over a thousand visitors
daily.
What is the half life of an antiproton in a cryo Penning trap?
I'd have thought that preventing stray hydrogen atoms getting in
there would be nigh on impossible. Hydrogen even diffuses through
steel...
How many of the 92 will make it to the end of the journey?
Actually it's not too bad. The half-life of antiprotons in a
well-evacuated and cooled Penning trap is of the order of
months, once the hottest particles have escaped. Holding on
to antihydrogen is much harder, because you can't use electric
fields to confine it. The half-life of antihydrogen is in the
ballpark of a quarter of an hour.
We always had trouble getting the very last traces of hydrogen and
water out of ultra hard vacuum systems. Have things improved recently?
I'm surprised it is that good. I guess to some extent it is like the
globular star clusters in astronomy after a few hot ones get expelled
and the remaining ones settle down into a sort of equilibrium.
Gravitation binds remaining stars ever more tightly but for protons
you need an externally applied field to keep them in the middle of the
trap.
I don't have the detailed knowledge. I know that several of the
experiments using antiprotons can continue to function for a few
months after the accelerators are stopped. The vacuum is of the
order of 10nPa. (7.5e-11 torr)
I think the analogy with globular star clusters is a good one,
except that antiprotons repel rather than attract and indeed
externally applied electric fields are needed to keep them
trapped. They use Penning-Malmberg traps. Some experiments
inject electrons to further cool the antiprotons.
Annihilation requires interactions involving three particles,
which is rare because there are so few of them. I believe the
gravitational capture of one body by another also usually
requires the presence of a third.
Jeroen Belleman
On 3/27/26 14:19, Jeroen Belleman wrote:
On 3/27/26 21:29, Martin Brown wrote:
On 26/03/2026 22:36, Jeroen Belleman wrote:
On 3/26/26 17:55, Martin Brown wrote:
On 26/03/2026 10:38, Jeroen Belleman wrote:
No, there isn't enough to blow anything up, not even close..
If you're interested, it's possible to visit CERN:
<https://visit.cern>. There may be waiting lists. It's
very sought after. CERN welcomes over a thousand visitors
daily.
What is the half life of an antiproton in a cryo Penning trap?
I'd have thought that preventing stray hydrogen atoms getting in
there would be nigh on impossible. Hydrogen even diffuses through
steel...
How many of the 92 will make it to the end of the journey?
Actually it's not too bad. The half-life of antiprotons in a
well-evacuated and cooled Penning trap is of the order of
months, once the hottest particles have escaped. Holding on
to antihydrogen is much harder, because you can't use electric
fields to confine it. The half-life of antihydrogen is in the
ballpark of a quarter of an hour.
We always had trouble getting the very last traces of hydrogen and
water out of ultra hard vacuum systems. Have things improved recently?
I'm surprised it is that good. I guess to some extent it is like the
globular star clusters in astronomy after a few hot ones get expelled
and the remaining ones settle down into a sort of equilibrium.
Gravitation binds remaining stars ever more tightly but for protons
you need an externally applied field to keep them in the middle of the
trap.
I don't have the detailed knowledge. I know that several of the
experiments using antiprotons can continue to function for a few
months after the accelerators are stopped. The vacuum is of the
order of 10nPa. (7.5e-11 torr)
I think the analogy with globular star clusters is a good one,
except that antiprotons repel rather than attract and indeed
externally applied electric fields are needed to keep them
trapped. They use Penning-Malmberg traps. Some experiments
inject electrons to further cool the antiprotons.
Annihilation requires interactions involving three particles,
which is rare because there are so few of them. I believe the
gravitational capture of one body by another also usually
requires the presence of a third.
Jeroen Belleman
You know the words 'bending spacetime' almost seem tailor
made to sound bad if you try to apply it to static electric
charges - in other words it is supposed to be strange if
space-time is bent in one direction for a positive electric
charge and it is bent in the opposite direction for a
negative electric charge.
Nonetheless basic question. Has anyone tried to subtract
out the electric fields and clearly determine that gravity
derived from regular matter does - attract antimatter rather
than - repel antimatter?
On Sat, 28 Mar 2026 06:28:51 -0700, x <x@x.net> wrote:
On 3/27/26 14:19, Jeroen Belleman wrote:
On 3/27/26 21:29, Martin Brown wrote:
On 26/03/2026 22:36, Jeroen Belleman wrote:
On 3/26/26 17:55, Martin Brown wrote:
On 26/03/2026 10:38, Jeroen Belleman wrote:
No, there isn't enough to blow anything up, not even close..
If you're interested, it's possible to visit CERN:
<https://visit.cern>. There may be waiting lists. It's
very sought after. CERN welcomes over a thousand visitors
daily.
What is the half life of an antiproton in a cryo Penning trap?
I'd have thought that preventing stray hydrogen atoms getting in
there would be nigh on impossible. Hydrogen even diffuses through
steel...
How many of the 92 will make it to the end of the journey?
Actually it's not too bad. The half-life of antiprotons in a
well-evacuated and cooled Penning trap is of the order of
months, once the hottest particles have escaped. Holding on
to antihydrogen is much harder, because you can't use electric
fields to confine it. The half-life of antihydrogen is in the
ballpark of a quarter of an hour.
We always had trouble getting the very last traces of hydrogen and
water out of ultra hard vacuum systems. Have things improved recently? >>>>
I'm surprised it is that good. I guess to some extent it is like the
globular star clusters in astronomy after a few hot ones get expelled
and the remaining ones settle down into a sort of equilibrium.
Gravitation binds remaining stars ever more tightly but for protons
you need an externally applied field to keep them in the middle of the >>>> trap.
I don't have the detailed knowledge. I know that several of the
experiments using antiprotons can continue to function for a few
months after the accelerators are stopped. The vacuum is of the
order of 10nPa. (7.5e-11 torr)
I think the analogy with globular star clusters is a good one,
except that antiprotons repel rather than attract and indeed
externally applied electric fields are needed to keep them
trapped. They use Penning-Malmberg traps. Some experiments
inject electrons to further cool the antiprotons.
Annihilation requires interactions involving three particles,
which is rare because there are so few of them. I believe the
gravitational capture of one body by another also usually
requires the presence of a third.
Jeroen Belleman
You know the words 'bending spacetime' almost seem tailor
made to sound bad if you try to apply it to static electric
charges - in other words it is supposed to be strange if
space-time is bent in one direction for a positive electric
charge and it is bent in the opposite direction for a
negative electric charge.
Nonetheless basic question. Has anyone tried to subtract
out the electric fields and clearly determine that gravity
derived from regular matter does - attract antimatter rather
than - repel antimatter?
does gravity attract antimatter
John Larkin
Highland Tech Glen Canyon Design Center
Lunatic Fringe Electronics
On 3/28/26 07:34, john larkin wrote:
On Sat, 28 Mar 2026 06:28:51 -0700, x <x@x.net> wrote:
On 3/27/26 14:19, Jeroen Belleman wrote:
On 3/27/26 21:29, Martin Brown wrote:
On 26/03/2026 22:36, Jeroen Belleman wrote:
On 3/26/26 17:55, Martin Brown wrote:
On 26/03/2026 10:38, Jeroen Belleman wrote:
No, there isn't enough to blow anything up, not even close..
If you're interested, it's possible to visit CERN:
<https://visit.cern>. There may be waiting lists. It's
very sought after. CERN welcomes over a thousand visitors
daily.
What is the half life of an antiproton in a cryo Penning trap?
I'd have thought that preventing stray hydrogen atoms getting in >>>>>>> there would be nigh on impossible. Hydrogen even diffuses through >>>>>>> steel...
How many of the 92 will make it to the end of the journey?
Actually it's not too bad. The half-life of antiprotons in a
well-evacuated and cooled Penning trap is of the order of
months, once the hottest particles have escaped. Holding on
to antihydrogen is much harder, because you can't use electric
fields to confine it. The half-life of antihydrogen is in the
ballpark of a quarter of an hour.
We always had trouble getting the very last traces of hydrogen and
water out of ultra hard vacuum systems. Have things improved recently? >>>>>
I'm surprised it is that good. I guess to some extent it is like the >>>>> globular star clusters in astronomy after a few hot ones get expelled >>>>> and the remaining ones settle down into a sort of equilibrium.
Gravitation binds remaining stars ever more tightly but for protons
you need an externally applied field to keep them in the middle of the >>>>> trap.
I don't have the detailed knowledge. I know that several of the
experiments using antiprotons can continue to function for a few
months after the accelerators are stopped. The vacuum is of the
order of 10nPa. (7.5e-11 torr)
I think the analogy with globular star clusters is a good one,
except that antiprotons repel rather than attract and indeed
externally applied electric fields are needed to keep them
trapped. They use Penning-Malmberg traps. Some experiments
inject electrons to further cool the antiprotons.
Annihilation requires interactions involving three particles,
which is rare because there are so few of them. I believe the
gravitational capture of one body by another also usually
requires the presence of a third.
Jeroen Belleman
You know the words 'bending spacetime' almost seem tailor
made to sound bad if you try to apply it to static electric
charges - in other words it is supposed to be strange if
space-time is bent in one direction for a positive electric
charge and it is bent in the opposite direction for a
negative electric charge.
Nonetheless basic question. Has anyone tried to subtract
out the electric fields and clearly determine that gravity
derived from regular matter does - attract antimatter rather
than - repel antimatter?
does gravity attract antimatter
John Larkin
Highland Tech Glen Canyon Design Center
Lunatic Fringe Electronics
Ok.
So, what is 'AI'? A generic term for 'technology'
when a reporter wants to report on something that
seems technological, but doesn't want to specify
what the 'technology' is?
Well maybe so, but it also two letters attached to the
'google' search engine.
On 3/27/26 14:19, Jeroen Belleman wrote:
On 3/27/26 21:29, Martin Brown wrote:
On 26/03/2026 22:36, Jeroen Belleman wrote:
On 3/26/26 17:55, Martin Brown wrote:
On 26/03/2026 10:38, Jeroen Belleman wrote:
No, there isn't enough to blow anything up, not even close..
If you're interested, it's possible to visit CERN:
<https://visit.cern>. There may be waiting lists. It's
very sought after. CERN welcomes over a thousand visitors
daily.
What is the half life of an antiproton in a cryo Penning trap?
I'd have thought that preventing stray hydrogen atoms getting in
there would be nigh on impossible. Hydrogen even diffuses through
steel...
How many of the 92 will make it to the end of the journey?
Actually it's not too bad. The half-life of antiprotons in a
well-evacuated and cooled Penning trap is of the order of
months, once the hottest particles have escaped. Holding on
to antihydrogen is much harder, because you can't use electric
fields to confine it. The half-life of antihydrogen is in the
ballpark of a quarter of an hour.
We always had trouble getting the very last traces of hydrogen and
water out of ultra hard vacuum systems. Have things improved recently?
I'm surprised it is that good. I guess to some extent it is like the
globular star clusters in astronomy after a few hot ones get expelled
and the remaining ones settle down into a sort of equilibrium.
Gravitation binds remaining stars ever more tightly but for protons
you need an externally applied field to keep them in the middle of
the trap.
I don't have the detailed knowledge. I know that several of the
experiments using antiprotons can continue to function for a few
months after the accelerators are stopped. The vacuum is of the
order of 10nPa. (7.5e-11 torr)
I think the analogy with globular star clusters is a good one,
except that antiprotons repel rather than attract and indeed
externally applied electric fields are needed to keep them
trapped. They use Penning-Malmberg traps. Some experiments
inject electrons to further cool the antiprotons.
Annihilation requires interactions involving three particles,
which is rare because there are so few of them. I believe the
gravitational capture of one body by another also usually
requires the presence of a third.
Jeroen Belleman
You know the words 'bending spacetime' almost seem tailor
made to sound bad if you try to apply it to static electric
charges - in other words it is supposed to be strange if
space-time is bent in one direction for a positive electric
charge and it is bent in the opposite direction for a
negative electric charge.
Nonetheless basic question.ÿ Has anyone tried to subtract
out the electric fields and clearly determine that gravity
derived from regular matter does - attract antimatter rather
than - repel antimatter?
On Sat, 28 Mar 2026 11:43:53 -0700, x <x@x.net> wrote:
On 3/28/26 07:34, john larkin wrote:
On Sat, 28 Mar 2026 06:28:51 -0700, x <x@x.net> wrote:
On 3/27/26 14:19, Jeroen Belleman wrote:
On 3/27/26 21:29, Martin Brown wrote:
On 26/03/2026 22:36, Jeroen Belleman wrote:
On 3/26/26 17:55, Martin Brown wrote:
On 26/03/2026 10:38, Jeroen Belleman wrote:
No, there isn't enough to blow anything up, not even close.. >>>>>>>>>
If you're interested, it's possible to visit CERN:
<https://visit.cern>. There may be waiting lists. It's
very sought after. CERN welcomes over a thousand visitors
daily.
What is the half life of an antiproton in a cryo Penning trap? >>>>>>>>
I'd have thought that preventing stray hydrogen atoms getting in >>>>>>>> there would be nigh on impossible. Hydrogen even diffuses through >>>>>>>> steel...
How many of the 92 will make it to the end of the journey?
Actually it's not too bad. The half-life of antiprotons in a
well-evacuated and cooled Penning trap is of the order of
months, once the hottest particles have escaped. Holding on
to antihydrogen is much harder, because you can't use electric
fields to confine it. The half-life of antihydrogen is in the
ballpark of a quarter of an hour.
We always had trouble getting the very last traces of hydrogen and >>>>>> water out of ultra hard vacuum systems. Have things improved recently? >>>>>>
I'm surprised it is that good. I guess to some extent it is like the >>>>>> globular star clusters in astronomy after a few hot ones get expelled >>>>>> and the remaining ones settle down into a sort of equilibrium.
Gravitation binds remaining stars ever more tightly but for protons >>>>>> you need an externally applied field to keep them in the middle of the >>>>>> trap.
I don't have the detailed knowledge. I know that several of the
experiments using antiprotons can continue to function for a few
months after the accelerators are stopped. The vacuum is of the
order of 10nPa. (7.5e-11 torr)
I think the analogy with globular star clusters is a good one,
except that antiprotons repel rather than attract and indeed
externally applied electric fields are needed to keep them
trapped. They use Penning-Malmberg traps. Some experiments
inject electrons to further cool the antiprotons.
Annihilation requires interactions involving three particles,
which is rare because there are so few of them. I believe the
gravitational capture of one body by another also usually
requires the presence of a third.
Jeroen Belleman
You know the words 'bending spacetime' almost seem tailor
made to sound bad if you try to apply it to static electric
charges - in other words it is supposed to be strange if
space-time is bent in one direction for a positive electric
charge and it is bent in the opposite direction for a
negative electric charge.
Nonetheless basic question. Has anyone tried to subtract
out the electric fields and clearly determine that gravity
derived from regular matter does - attract antimatter rather
than - repel antimatter?
does gravity attract antimatter
John Larkin
Highland Tech Glen Canyon Design Center
Lunatic Fringe Electronics
Ok.
So, what is 'AI'? A generic term for 'technology'
when a reporter wants to report on something that
seems technological, but doesn't want to specify
what the 'technology' is?
Well maybe so, but it also two letters attached to the
'google' search engine.
The google AI search isn't bad. One shouldn't believe it absolutely,
but it usually has credible references and is a good start for
branching out.
I sometimes don't have the just-right words for a search, and the
google AI often furnishes them.
John Larkin--
Highland Tech Glen Canyon Design Center
Lunatic Fringe Electronics
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