Electromagnetic Slow Wave Systems

[bitrex]

In the recent season of the Netflix series "Stranger Things" one of the
characters is shown checking out books from the library to research why
magnetic fields are behaving strangely in her small town, one of the
books shown at the top of the stack is "Electromagnetic Slow Wave Systems":

<https://www.amazon.com/Electromagnetic-slow-wave-systems-Bevensee/dp/B0007DS8PE>

Looks like heavy stuff, the only review states "I don't understand a
damn thing in it."

 

[bitrex]

On 7/12/19 2:18 PM, bitrex wrote:

In the recent season of the Netflix series "Stranger Things" one of the
characters is shown checking out books from the library to research why
magnetic fields are behaving strangely in her small town, one of the
books shown at the top of the stack is "Electromagnetic Slow Wave Systems":

https://www.amazon.com/Electromagnetic-slow-wave-systems-Bevensee/dp/B0007DS8PE


Looks like heavy stuff, the only review states "I don't understand a
damn thing in it."

It looks related to research into the properties of helical wave-guides
at microwave frequencies which seemed to be a hot area of research in
the mid 60s.

 

[Phil Hobbs]

On 7/12/19 2:22 PM, bitrex wrote:

On 7/12/19 2:18 PM, bitrex wrote:
In the recent season of the Netflix series "Stranger Things" one of
the characters is shown checking out books from the library to
research why magnetic fields are behaving strangely in her small town,
one of the books shown at the top of the stack is "Electromagnetic
Slow Wave Systems":

https://www.amazon.com/Electromagnetic-slow-wave-systems-Bevensee/dp/B0007DS8PE


Looks like heavy stuff, the only review states "I don't understand a
damn thing in it."

It looks related to research into the properties of helical wave-guides
at microwave frequencies which seemed to be a hot area of research in
the mid 60s.

TWTs are based on slow-wave structures, so they're still pretty
important. The math isn't that hard if the structure is vaguely
regular--the helical-core transmission line is covered in Ramo,
Whinnery, & Van Duzer, for instance, which is an upper-level
undergraduate book.

Dielectric slow-wave structures have their uses in optics as well,
especially for enhancing nonlinearities and other stuff such as particle
acceleration.

Cheers

Phil Hobbs

--
Dr Philip C D Hobbs
Principal Consultant
ElectroOptical Innovations LLC / Hobbs ElectroOptics
Optics, Electro-optics, Photonics, Analog Electronics
Briarcliff Manor NY 10510

http://electrooptical.net
http://hobbs-eo.com

 

[bitrex]

On 7/12/19 3:21 PM, Phil Hobbs wrote:

On 7/12/19 2:22 PM, bitrex wrote:
On 7/12/19 2:18 PM, bitrex wrote:
In the recent season of the Netflix series "Stranger Things" one of
the characters is shown checking out books from the library to
research why magnetic fields are behaving strangely in her small
town, one of the books shown at the top of the stack is
"Electromagnetic Slow Wave Systems":

https://www.amazon.com/Electromagnetic-slow-wave-systems-Bevensee/dp/B0007DS8PE


Looks like heavy stuff, the only review states "I don't understand a
damn thing in it."

It looks related to research into the properties of helical
wave-guides at microwave frequencies which seemed to be a hot area of
research in the mid 60s.

TWTs are based on slow-wave structures, so they're still pretty
important.  The math isn't that hard if the structure is vaguely
regular--the helical-core transmission line is covered in Ramo,
Whinnery, & Van Duzer, for instance, which is an upper-level
undergraduate book.

Dielectric slow-wave structures have their uses in optics as well,
especially for enhancing nonlinearities and other stuff such as particle
acceleration.

Cheers

Phil Hobbs

I'll see if I can screen-cap the particular scene, it was a stack of
about 8 or 10 vintage books on various EM topics that all looked kinda
interesting.

Whoever was working in the prop department that day seemed to have a
good selection to pull from

 

[bitrex]

On 7/12/19 4:39 PM, bitrex wrote:

Dielectric slow-wave structures have their uses in optics as well,
especially for enhancing nonlinearities and other stuff such as
particle acceleration.

Cheers

Phil Hobbs


I'll see if I can screen-cap the particular scene, it was a stack of
about 8 or 10 vintage books on various EM topics that all looked kinda
interesting.

Whoever was working in the prop department that day seemed to have a
good selection to pull from

The series is set in early 1984 and they seemed period-appropriate

 

[Bill Beaty]

On Friday, July 12, 2019 at 1:41:42 PM UTC-7, bitrex wrote:

On 7/12/19 4:39 PM, bitrex wrote:

Dielectric slow-wave structures have their uses in optics as well,
especially for enhancing nonlinearities and other stuff such as
particle acceleration.

Cheers

Phil Hobbs


I'll see if I can screen-cap the particular scene, it was a stack of
about 8 or 10 vintage books on various EM topics that all looked kinda
interesting.

Whoever was working in the prop department that day seemed to have a
good selection to pull from

The series is set in early 1984 and they seemed period-appropriate

Math treatment of TESLA COIL SECONDARIES!

And magnetrons, TWT, microwave chirp-antichirp.

See a pro review:

https://ieeexplore.ieee.org/stamp/stamp.jsp?arnumber=1445285
"This is an excellent book, concerned primarily
with the wave guiding properties of
certain classes of periodic structures. In
particular, the author says heavy stressu pon
coupled cavity chains and distributed helices,
in contrast to the lumped electric filter and
crystal lattice slow wave structures treated
in Brillouin’sl classic work. Going far beyond
previous textbook efforts in the area of distributed
slow wave systems, Prof. Bevensee
has brought together a large amount of detailed
information, the final two-thirds of
which was hitherto unpublished. The book
should be of particular interest for persons
with prior experience in the area, since little
time is spent on introductory material and
the analysis immediately proceeds at a high
level.

After a brief introduction, the book opens
with a chapter which describes some basic
properties of slow wave systems and introduces
the central problem of finding dispersion
curves. (Incidentally, all chapters are
initiated with very helpful synopses which
outline the chapters and show their relationship
to preceding ones.) Chapter I1 describes
the helix in the traditional way and other
assorted structures are treated briefly. In
the next three chapters, the author warms
up to his main topic: coupled cavity chains..


https://ieeexplore.ieee.org/stamp/stamp.jsp?arnumber=1445285