Some people cannot read properly.

Below here the radiation is due to a change in direction caused by RE-
COMPRESSING exploding electron bunches.


http://en.wikipedia.org/wiki/Synchrotron_radiation

QUOTE:
" The magnets also need to repeatedly recompress the Coulomb-
exploding
space charge electron bunches. The change of direction is a form of
acceleration and thus the electrons emit radiation at GeV
frequencies."

****************************************

This radiation would still occur even if the synchrotron was a
perfeclty straight pipeline (In no way does this relate with the bend
of the synchrotron ring).

On Jun 12, 12:38 am, " wrote:
Some people cannot read properly.

Below here the radiation is due to a change in direction caused by RE-
COMPRESSING exploding electron bunches.

http://en.wikipedia.org/wiki/Synchrotron_radiation

QUOTE:
" The magnets also need to repeatedly recompress the Coulomb-
exploding
space charge electron bunches. The change of direction is a form of
acceleration and thus the electrons emit radiation at GeV
frequencies."

****************************************

This radiation would still occur even if the synchrotron was a
perfeclty straight pipeline (In no way does this relate with the bend
of the synchrotron ring).


"Synchrotron radiation is the name given to the radiation which
occurs when charged particles are accelerated in a curved path
or orbit. Classically, any charged particle which moves in a
curved path or is accelerated in a straight-line path will
emit electromagnetic radiation."
(http://hyperphysics.phy-astr.gsu.edu/hbase/particles/
synchrotron.html)

"When charged particles, in particular electrons or positrons,
are forced to move in a circular orbit, photons are emitted."
(http://www.ansto.com.au/natfac/asrp4.html)

"Synchrotron radiation is emitted by electrons orbiting
in a storage ring."
(http://uw.physics.wisc.edu/~himpsel/synrad.html)

"Radiation is caused by transverse acceleration due to magnetic
forces in bending magnets (forming the circular path)..."
(www-ssrl.slac.stanford.edu/primer.pdf)


- Randy

On Jun 11, 8:38 pm, " wrote:
Some people cannot read properly.
[...]

Case in point.

On Jun 11, 11:38 pm, " wrote:
Some people cannot read properly.

Below here the radiation is due to a change in direction caused by RE-
COMPRESSING exploding electron bunches.

http://en.wikipedia.org/wiki/Synchrotron_radiation

QUOTE:
" The magnets also need to repeatedly recompress the Coulomb-
exploding
space charge electron bunches. The change of direction is a form of
acceleration and thus the electrons emit radiation at GeV
frequencies."

****************************************

This radiation would still occur even if the synchrotron was a
perfeclty straight pipeline (In no way does this relate with the bend
of the synchrotron ring).

Reading a description of ONE WAY to generate synchrotron radiation is
not extrapolable to a statement that this is THE WAY to generate
synchrotron radiation.

This is the problem with reading snippets on the Web. You do not get
the big picture.

PD

On Jun 12, 12:38 am, " wrote:
Some people cannot read properly.

Below here the radiation is due to a change in direction caused by RE-
COMPRESSING exploding electron bunches.

http://en.wikipedia.org/wiki/Synchrotron_radiation

QUOTE:
" The magnets also need to repeatedly recompress the Coulomb-
exploding
space charge electron bunches. The change of direction is a form of
acceleration and thus the electrons emit radiation at GeV
frequencies."

The entire quote:

"The electrons are forced to travel in a closed loop by strong
magnetic fields. The magnets also need to repeatedly recompress
the Coulomb-exploding space charge electron bunches. The change
of direction is a form of acceleration and thus the electrons
emit radiation at GeV frequencies."

You think "the change of direction" refers only to the second
change, the refocusing. At best this paragraph is ambiguous
since the closed loop is also a change of direction. There
are two sentence describing a change in direction. There is
no reason to assume "the change in direction" applies only
to the second sentence.

But in fact it is the first which is the dominant effect,
as it involves a much larger acceleration. The first (moving
in a circle) is like driving at high speed around a closed
track. The second (correction to orbit) is like changing lanes
as you drive the track.

There may be synchrotrons which deliberately introduce
larger changes in orbit (some of the references I found
mention "wiggler magnets"). But the synchrotron effect
was discovered for simple orbits and is found in every
case where particles travel in a circle, with or
without focusing/defocusing.

- Randy

On Jun 12, 9:19 am, Randy Poe wrote:
On Jun 12, 12:38 am, " wrote:

Some people cannot read properly.

Below here the radiation is due to a change in direction caused by RE-
COMPRESSING exploding electron bunches.

http://en.wikipedia.org/wiki/Synchrotron_radiation

QUOTE:
" The magnets also need to repeatedly recompress the Coulomb-
exploding
space charge electron bunches. The change of direction is a form of
acceleration and thus the electrons emit radiation at GeV
frequencies."

The entire quote:

"The electrons are forced to travel in a closed loop by strong
magnetic fields. The magnets also need to repeatedly recompress
the Coulomb-exploding space charge electron bunches. The change
of direction is a form of acceleration and thus the electrons
emit radiation at GeV frequencies."

You think "the change of direction" refers only to the second
change, the refocusing. At best this paragraph is ambiguous

I put in balance this "possible" ambiguity versus the force needed to
perfectly perpendicularly deflect an object from it's linear
trajectory as compared to the force needed to compress together from
BOTH direction these same moving projectiles?

That and the part somewhere else where (who can document and reference
everything they once read) it said it's not that hard (energy wise) to
achieve an electron to travel at near light speed as it is hard to
increase the density (compression) and mass of the "electron bunches"
for the collision to occur between electron and positron.


since the closed loop is also a change of direction. There
are two sentence describing a change in direction. There is
no reason to assume "the change in direction" applies only
to the second sentence.

But in fact it is the first which is the dominant effect,
as it involves a much larger acceleration. The first (moving
in a circle) is like driving at high speed around a closed
track. The second (correction to orbit) is like changing lanes
as you drive the track.

There may be synchrotrons which deliberately introduce
larger changes in orbit (some of the references I found
mention "wiggler magnets"). But the synchrotron effect
was discovered for simple orbits and is found in every
case where particles travel in a circle, with or
without focusing/defocusing.

- Randy