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Unlike some other reproductions of classic texts (1) We have not
used OCR(Optical Character Recognition), as this leads to bad
quality books with introduced typos. (2) In books where there are
images such as portraits, maps, sketches etc We have endeavoured to
keep the quality of these images, so they represent accurately the
original artefact. Although occasionally there may be certain
imperfections with these old texts, we feel they deserve to be made
available for future generations to enjoy.
Unlike some other reproductions of classic texts (1) We have not
used OCR(Optical Character Recognition), as this leads to bad
quality books with introduced typos. (2) In books where there are
images such as portraits, maps, sketches etc We have endeavoured to
keep the quality of these images, so they represent accurately the
original artefact. Although occasionally there may be certain
imperfections with these old texts, we feel they deserve to be made
available for future generations to enjoy.
The Spinning Tops are disembodied beings who coexist with us on
Earth in an invisible, parallel dimension. They send us messages of
love and peace, and they help relieve our anxieties. They support
us on our way to perfect harmony and, ultimately, to God. Lucie is
the medium who delivers these loving messages. She withholds
nothing ... her mind is a blank page. The Spinning Tops shine
through her like crystal, and she delivers their messages
faithfully. In these loving messages, the Spinning Tops explain how
adversity and misfortune are repercussions of accumulated human
negativity that counteracts God's plan. God is perfect order,
harmonious unity. Unknowingly, our minds wield forces that are
disturbing the vibratory zones around the Earth, putting our planet
out of balance, causing more and more natural disasters. For all of
us, saving the planet means first finding the courage to walk the
path of wisdom, joy, happiness, and love of others. This is the
eleventh commandment, and it is our responsibility to the future.
By not following the personal path you were given before birth, you
disturb the terrestrial forces. By following your very own
preprogrammed destiny, you are helping the Earth to come back into
alignment.
Volume 2 of the book begins with chapter 6, in which we have taken
up conventional MWTs (such as TWTs, klystrons, including
multi-cavity and multi-beam klystrons, klystron variants including
reflex klystron, IOT, EIK, EIO and twystron, and crossed-field
tubes, namely, magnetron, CFA and carcinotron). In chapter 7, we
have taken up fast-wave tubes (such as gyrotron, gyro-BWO,
gyro-klystron, gyro-TWT, CARM, SWCA, hybrid gyro-tubes and
peniotron). In chapter 8, we discuss vacuum microelectronic tubes
(such as klystrino module, THz gyrotron and clinotron BWO);
plasma-assisted tubes (such as PWT, plasma-filled TWT, BWO,
including PASOTRON, and gyrotron); and HPM (high power microwave)
tubes (such as relativistic TWT, relativistic BWO, RELTRON (variant
of relativistic klystron), relativistic magnetron, high power
Cerenkov tubes including SWO, RDG or orotron, MWCG and MWDG,
bremsstrahlung radiation type tube, namely, vircator, and M-type
tube MILO). In Chapter 9, we provide handy information about the
frequency and power ranges of common MWTs, although more such
information is provided at relevant places in the rest of the book
as and where necessary. Chapter 10 is an epilogue that sums up the
authors' attempt to bring out the various aspects of the basics of
and trends in high power MWTs.
Our aim in this book is to present a bird's-eye view of microwave
tubes (MWTs) which continue to be important despite competitive
incursions from solid-state devices (SSDs). We have presented a
broad and introductory survey which we hope the readers would be
encouraged to read rather than going through lengthier books, and
subsequently explore the field of MWTs further in selected areas of
relevance to their respective interests. We hope that the present
book would motivate newcomers to pursue research in MWTs and
apprise them as well as decision makers of the salient features and
prospects of as well as the trends of progress in MWTs. The scope
of ever expanding applications of MWTs in the high power and high
frequency regime will sustain and intensify the research and
development in MWTs in coming years.
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