ALBERT

All Library Books, journals and Electronic Records Telegrafenberg

X
feed icon rss

Your email was sent successfully. Check your inbox.

An error occurred while sending the email. Please try again.

Proceed reservation?

Export
  • 1
    Electronic Resource
    Electronic Resource
    A note on RF photocathode guns triggered by synchrotron light (1992)
    Springer
    Applied physics 55 (1992), S. 446-450 
    Details
    ISSN: 1432-0649
    Keywords: 41.60.Ap ; 41.85.-p ; 41.60.Cr
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract In this note we explore the conditions under which synchrotron radiation can be used to trigger a photocathode gun. We show that such a solution offers in principle the possibility of operating with a pulsed electron beam filling all the buckets of the accelerating radio frequency. Some comments on the e-beam characteristics are also presented.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00325185
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 2
    Electronic Resource
    Electronic Resource
    FEL gain in the pulsed regime: a comparison between numerical and analytical results (1990)
    Springer
    Il nuovo cimento della Società Italiana di Fisica 12 (1990), S. 21-34 
    Details
    ISSN: 0392-6737
    Keywords: Photoelectric and optoelectronic devices and systems
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Description / Table of Contents: Riassunto In questo lavoro vengono derivate formule semplici e generali relative al guadagno FEL in regime impulsato. Tali formule tengono conto dell'accoppiamento tra i modi longitudinali e dell'effetto di letargia. Le relazioni di cui sopra sono ottenute nell'ambito di una trattazione numerica delle equazioni di propagazione degli impulsi e sono poi comparate ad analoghe espressioni ottenute per via analitica nel caso limite di pacchetto di elettroni lungo. Si dimostra come l'accordo sia particolarmente buono.
    Abstract: Резюме В зтой статье мы приводим простые и общие формулы для усиления для лазера на свободных злектронах в импульсном режиме, учитывая связь продольных мод и зффект летаргии. Зти соотношения, полченные с помощью численного интегрирования уравнений распространения импульса, затем сравниваются с аналогичными выражениями, полученными аналитически в предельном случае приближения длинного сгустка, и получается хорошее согласие.
    Notes: Summary In this paper we present simple and general formulae for the FEL gain in the pulsed regime including both the longitudinal mode coupling and the lethargy effect. Such relations, obtained from a numerical integration of the pulse propagation equations, are then compared to similar expressions obtained analitycally in the limiting case of the long bunch approximation and the agreement is shown to be excellent.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02453023
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 3
    Electronic Resource
    Electronic Resource
    Exact treatment of spontaneous emission in helical and solenoidal magnetic field (1992)
    Springer
    Il nuovo cimento della Società Italiana di Fisica 14 (1992), S. 719-727 
    Details
    ISSN: 0392-6737
    Keywords: Particles in electromagnetic fields (including synchrotron radiation)
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Summary In this paper we discuss the spectral properties of the radiation emitted by electrons moving in helical undulators and solenoids. The analysis is exact, in the sense that the electron beam is not assumed to be ultrarelativistic but the far-field condition is still retained. We also discuss the low-energy corrections, the limits of validity of the usual approximations and the relevance of our results to gyrotron-type devices.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02451718
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 4
    Electronic Resource
    Electronic Resource
    Spontaneous emission in Ĉerenkov FEL devices: a preliminary theoretical analysis (1988)
    Springer
    Il nuovo cimento della Società Italiana di Fisica 10 (1988), S. 1-20 
    Details
    ISSN: 0392-6737
    Keywords: Lasing processes
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Description / Table of Contents: Riassunto In questo lavoro si discutono le caratteristiche dello spettro della radiazione Ĉerenkov, emessa in guide d'onde circolari e rettangolari riempite con dielettrico. Si analizzano inoltre le proprietà della radiazione emessa da un fascio di elettroni in moto in prossimità e parallelamente alla superficie di una »slab» di dielettrico. Si discute, infine, brevemente, l'importanza di questi risultati per la realizzazione di un possibile FEL-Ĉerenkov.
    Abstract: Резюме Обсуждаются основиые особенности спектральных характеристик спонтанного черенковского излучения в круговых и прямоугольных волноводах, заполненных диэлектриком. Также анализируются характеристики излучения, испущенного электронным пучком, движущимся вблизи и пораллелйно поверхности диэлектрической пластинки. В заключение, вкратце обсуждется применимость полученных результатов в возможных FEL-черенковских приборах.
    Notes: Summary The main features of the spectral characteristics of the spontaneously emitted Ĉerenkov light in circular and rectangular wave guides filled with dielectric are discussed. The characteristics of the radiation emitted by an electron beam moving near and parallel to the surface of a dielectric slab are also analysed. Finally, the relevance of these results to a possible FEL-Ĉerenkov operation is briefly discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02450085
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 5
    Electronic Resource
    Electronic Resource
    The 3-D FEL pulse propagation equation: An analytical treatment in the low-gain and small-signal regime (1991)
    Springer
    Il nuovo cimento della Società Italiana di Fisica 13 (1991), S. 615-632 
    Details
    ISSN: 0392-6737
    Keywords: Laser resonators ; cavities ; amplifiers ; Laser beam deflection and focusing
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Summary In this paper we show that the transverse mode evolution of a FEL operating with short pulses can be treated, in the small-signal and low-gain regime, using a relatively simple mathematical technique leading to a potentially fast numerical algorithm. We also point out that analytical solutions can be obtained for the cases where the slippage length is small compared to the longitudinal bunch length.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02451286
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 6
    Electronic Resource
    Electronic Resource
    Analytical and numerical solutions of some integral equations in radiation transport theory (1994)
    Springer
    Il nuovo cimento della Società Italiana di Fisica 16 (1994), S. 1325-1338 
    Details
    ISSN: 0392-6737
    Keywords: Free-electron lasers ; Integral equations ; Functional analysis ; Conference proceedings
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Summary We discuss some mathematical and computational problems relevant to the solutions of both linear and non-linear integral equations arising in radiation transport. By means of a functional-operator approach, analytic solutions for the FEL (Free Electron Laser) integral equations are found in terms of Bessel-Clifford functions. As for applications of this method to non-linear equations, the same technique allows us to obtain an efficient yet simple algorithm for the numerical solution of the Ambartsumian-ChandrasekharH-equation corresponding to a Neumann-series expansion.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02458819
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 7
    Electronic Resource
    Electronic Resource
    Towards a wave theory of charged-beam propagation (1992)
    Springer
    Il nuovo cimento della Società Italiana di Fisica 14 (1992), S. 271-278 
    Details
    ISSN: 0392-6737
    Keywords: Particles in electromagnetic fields (including synchrotron radiation)
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Summary Using a recentquantum-mechanical treatment of charged-beam propagation in which the emittance plays the role of Planck's constant, we construct a wave theory of the beam transport along guiding systems. We show that the distribution of a beam passing through quadrupole lenses can be described in terms of Gaussian beams. We discuss the role of Twiss parameters within this context and derive anABCD law for charged beam transport.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02457389
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 8
    Electronic Resource
    Electronic Resource
    Inhomogeneous broadening effects in high-gain free electron laser operation: A simple parametrization (1989)
    Springer
    Il nuovo cimento della Società Italiana di Fisica 11 (1989), S. 393-404 
    Details
    ISSN: 0392-6737
    Keywords: Photoelectric and optoelectronic devices and systems
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Description / Table of Contents: Riassunto In questo lavoro si analizzano gli effetti di allargamento inomogeneo in FEL operanti nel regime di alto guadagno. Si presenta una semplice formula che permette di parametrizzare il guadagno in funzione dei parametri inomogenei dovuti allo spread di energia ed alle emittanze. La parametrizzazione è basata su una procedura di interpolazione dei dati numerici. L'accuratezza della interpolazione è migliore dell'1%.
    Abstract: Резюме В этой работе анлизируется влияние эффектов неоднородного уширения на действие лазера на свободных электронах с высоким усилением. Предлагается простая формула для параметризации коэффициента усиления в зависимости от параметров неоднородного уширения, связанных с разбросом энергии и эмиттанса электронного пучка. Параметризация основана на интерполяции численных данных. Точность интерполяции оказывается лучше 1%.
    Notes: Summary In this paper we present a simple parametrization of the effects of gain degradation induced in high-current FELs by the inhomogeneous broadenings due to the energy spread and emittances of the electron beam. The parametrization is based on a fitting procedure of the numerical data. The accuracy of the fit is better than 1%.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02450989
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 9
    Electronic Resource
    Electronic Resource
    Effect of the incoherent emission on the FEL pulse width (1989)
    Springer
    Il nuovo cimento della Società Italiana di Fisica 11 (1989), S. 509-516 
    Details
    ISSN: 0392-6737
    Keywords: Photoelectric and optoelectronic devices and systems
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Description / Table of Contents: Riassunto Gli autori discutono l’effetto della emissione spontanea incoerente sull’ampiezza dell’impulso laser in un FEL nel corso dell’evoluzione del segnale. Le espressioni riportate sono derivate nel contesto della teoria dei supermodi precedentemente sviluppata relativamente al regime di basso guadagno e piccolo segnale e nell’ipotesi di pacchetto di elettroni lungo.
    Abstract: Резюме В этой статье мы обсуждаем влияние некогерентного спонтанного нзлучения на ширину импульса в лазере на свободных электронах. Мы анализируем зависимость пространственной ширины импульса лазера от числа пролетов в рамках теории супер-мод. Мы также исследуем дисторсию, индуцированную в спектре супермод из-за некогерентного излучения.
    Notes: Summary In this paper we discuss the effect of the incoherent spontaneous emission on the FEL pulse width. We analyse the dependence of the laser spatial width on the number of round trips, within the framework of the supermodes’ theory. We also study the distortion induced in the supermode spectrum by the incoherent emission.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02457507
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 10
    Electronic Resource
    Electronic Resource
    Recursive differential equations of the raman-nath type: A general review (1984)
    Springer
    Il nuovo cimento della Società Italiana di Fisica 4 (1984), S. 293-311 
    Details
    ISSN: 0392-6737
    Keywords: Nonlinear optics
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Description / Table of Contents: Riassunto In questo lavoro si studiano equazioni differenziali alle ricorrenze di tipo Raman-Nath e s’introduce una tecnica di analisi valida per la ricerca di soluzioni esatte e perturbate.
    Abstract: Резюме В этой статье мы обсуждаем дифференциальные уравнения Рамана-Ната и вводим очень общую технику анализа, справедливую для точных и пертурбационных решений.
    Notes: Summary In this paper we discuss the differential recursive equations of the Raman-Nath type and introduce a very general technique of analysis, valid for both exact and perturbed solutions.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02453347
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...