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The main goal of the book is to provide a systematic and
didactic approach to the physics and technology of free-electron
lasers. Numerous figures are used for illustrating the underlying
ideas and concepts and links to other fields of physics are
provided. After an introduction to undulator radiation and the
low-gain FEL, the one-dimensional theory of the high-gain FEL is
developed in a systematic way. Particular emphasis is put on
explaining and justifying the various assumptions and
approximations that are needed to obtain the differential and
integral equations governing the FEL dynamics. Analytical and
numerical solutions are presented and important FEL parameters are
defined, such as gain length, FEL bandwidth and saturation power.
One of the most important features of a high-gain FEL, the
formation of microbunches, is studied at length. The increase of
gain length due to beam energy spread, space charge forces, and
three-dimensional effects such as betatron oscillations and optical
diffraction is analyzed. The mechanism of Self-Amplified
Spontaneous Emission is described theoretically and illustrated
with numerous experimental results. Various methods of FEL seeding
by coherent external radiation are introduced, together with
experimental results. The world s first soft X-ray FEL, the user
facility FLASH at DESY, is described in some detail to give an
impression of the complexity of such an accelerator-based light
source. The last chapter is devoted to the new hard X-ray FELs
which generate extremely intense radiation in the Angstrom regime.
The appendices contain supplementary material and more involved
calculations."
The high scienti?c interest in coherent X-ray light sources has
stimulated world-wide e?orts in developing X-ray lasers. In this
book a particularly promising approach is described, the
free-electron laser (FEL), which is p- sued worldwide and holds the
promise to deliver ultra-bright X-ray pulses of femtosecond
duration. Other types of X-ray lasers are not discussed nor do we
try a comparison of the relative virtues and drawbacks of di?erent
concepts. The book has an introductory character and is written in
the style of a
universitytextbookforthemanynewcomerstothe?eldoffree-electronlasers,
graduate students as well as accelerator physicists, engineers and
technicians; it is not intended to be a scienti?c monograph for the
experts in the ?eld. Building on lectures by one of us (J. R.) at
the CERN Accelerator School, and motivated by the positive response
to a series of seminars on "FEL t- ory for pedestrians," given by
P. S. within the framework of the Academic Training Program at
DESY, we have aimed at presenting the theory of the
low-gainandthehigh-gainFELinaclearandconcisemathematicallanguage.
Particular emphasis is put on explaining and justifying the
assumptions and approximations that are needed to obtain the
di?erential equations descr- ing the FEL dynamics. Although we have
tried our best to be "simple," the mathematical derivations are
certainly not always as simple as one would like them to be.
However, we are not aware of any easier approach to the FEL theory.
Some of the more involved calculations are put into the appendices.
Das zweibandige Lehrbuch vermittelt die Grundlagen der
theoretischen Physik und berucksichtigt dabei besonders die
Quantenmechanik, die spezielle Relativitatstheorie und die
Elektrodynamik fur den Unterricht an Gymnasien. Band2 bietet eine
systematische Einfuhrung in die Elektrodynamik auf Basis der
Maxwellschen Gleichungen sowie eine Einfuhrung in die
relativistische Mechanik. Der Stoff wird einfach und klar
dargestellt, Abbildungen und didaktische Anmerkungen erleichtern
den Zugang zur Theorie und geben Hinweise fur die Vermittlung im
Unterricht."
Das zweibandige Lehrbuch vermittelt die Grundlagen der
theoretischen Physik und berucksichtigt dabei besonders die
Quantenmechanik, die spezielle Relativitatstheorie und die
Elektrodynamik fur den Unterricht an Gymnasien. Band 1 umfasst eine
systematische Einfuhrung in die Quantentheorie und bezieht moderne
Experimente mit ein. Der Zugang zur Theorie ist so gewahlt, dass
auch diejenigen folgen koennen, die nicht Mathematik im 2. Fach
studieren. Daruber hinaus erleichtern Diskussionen zu
experimentellen Daten und didaktische Anmerkungen das Verstehen.
Die Dirac-Gleichung und Feynman-Graphen werden in Anlehnung an die
Feynmanschen Originalarbeiten eingefuhrt. Viele Reaktionen der
elektromagnetischen und schwachen Wechselwirkung werden vom
Matrixelement bis zum Wirkungsquerschnitt explizit berechnet. Die
Eichinvarianz in der Elektrodynamik und der Quantenmechanik wird
besprochen und der Higgs-Mechanismus in Analogie zum
Meissner-Effekt in Supraleitern dargestellt. Die Eichtheorien der
vereinheitlichten elektroschwachen Wechselwirkung und der
Quark-Gluon-Wechselwirkungen (Quantenchromodynamik) schliessen
daran an. Das Buch ist zum Gebrauch neben Vorlesungen und zum
Selbststudium gedacht, wofur der Autor viele Ubungsaufgaben stellt.
Fur den Fachmann ist es ein Referenzbuch fur den praktischen Umgang
mit Feynman-Graphen."
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