Books

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2018-10-19
09:17
OpenAccess [PUBDB-2018-03848] Book/Report/Dissertation / PhD Thesis
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Structure of complex fluids under shear flows
[DESY-THESIS-2018-028]
Hamburg : Verlag Deutsches Elektronen-Synchrotron, DESY THESIS 137 pp. () [10.3204/PUBDB-2018-03848] = Dissertation, Universität Hamburg, 2018  GO
With the recent developments of modern synchrotron and X-ray Free Electron Laser (XFEL) light sources high speed and micrometer sized liquid jets have become one of the most important sample delivery systems. For that reason it is highly important to develop liquid jet devices compatible with micrometer X-ray beams, which are optimized for the investigation of nanostructures and the behavior of complex liquids behavior under flow.This thesis reports a detailed X-ray scattering study of a liquid jet produced by a gas dynamic virtual nozzle (GDVN) system. [...]
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2018-09-27
15:27
OpenAccess [PUBDB-2018-03666] Book/Report/Internal Report
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Achievement of 35 MV/m in the Superconducting Nine-Cell Cavities for TESLA
[TESLA 2004-05]
TESLA Reports 20 pp. () [10.3204/PUBDB-2018-03666]  GO
The Tera Electronvolt Superconducting Linear Accelerator TESLA is the only linear electron-positron collider project based on superconductor technology for particle acceleration. In the first stage with 500 GeV center-of-mass energy an accelerating field of 23.4 MV/m is needed in the superconducting niobium cavities which are operated at a temperature of 2 K and a quality factor $Q_{0}$ of $10^{10}$ [...]
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2018-09-27
14:08
OpenAccess [PUBDB-2018-03658] Book/Report/Internal Report
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Improved Surface Treatment of the Superconducting TESLA Cavities
[TESLA 2004-04]
TESLA Reports 11 pp. () [10.3204/PUBDB-2018-03658]  GO
The proposed linear electron-positron collider TESLA is based on 1.3 GHz superconducting niobium cavities for particle acceleration. For a center-of-mass energy of 500 GeV an accelerating field of 23.4 MV/m is required which is reliably achieved with a niobium surface preparation by chemical etching. [...]
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2018-09-27
13:47
OpenAccess [PUBDB-2018-03653] Book/Report/Internal Report
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Beam Dynamics Simulations for European XFEL
[TESLA-FEL 2013-04]
TESLA-FEL Reports 31 pp. () [10.3204/PUBDB-2018-03653]  GO
The European x-ray free electron laser (EXFEL) which is under construction will be a free electron laser facility based on self-amplified spontaneous emission (SASE). This facilitycan produce hard X-ray photons with 1 angstrom wavelength in undulator section SASE1, hard X-ray photons with 0.1-0.4nm wavelength in section SASE2, and soft X-ray photons with 0.4-1.6 nm wavelength in section SASE3. [...]
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2018-09-27
13:30
OpenAccess [PUBDB-2018-03652] Book/Report/Internal Report

Comparison of Stripline and Cavity Beam Position Monitors
[TESLA Report 2004-03]
TESLA Reports 9 pp. () [10.3204/PUBDB-2018-03652]  GO
Operational principles of stripline and pill-box cavity beam position monitors (BPMs) are discussed. Their theoretically best achievable position and time resolutions are computed. [...]
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2018-09-27
09:47
OpenAccess [PUBDB-2018-03625] Book/Report/Internal Report
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Anti-multipactor TiN coating of RF power coupler components for TESLA at DESY
[TESLA Report 2004-02]
TESLA Reports 40 pp. () [10.3204/PUBDB-2018-03625]  GO
A development project was carried out at DESY, aimed at reducing secondary electron emission and multipactor effects in TESLA couplers by TiN layers generation on surfaces which were not protected in this way previously. Thin TiN films on ceramic or metallic surfaces were produced by deposition from Ti vapor in low pressure ammonia. [...]
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2018-09-27
09:37
[PUBDB-2018-03621] Book/Report/Internal Report
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Wake Fields Generated by the LOLA-IV Structure and the $3^{rd}$ Harmonic Section in TTF-II
[TESLA Report 2004-01]
TESLA Reports 21 pp. ()
In this report we estimate long- and short-range wake functions for new elements to be used in TESLA Test Facility (TTF) – II. The wake potentials of the LOLA-IV structure and the $3^{rd}$ harmonic section are calculated numerically for very short bunches and analytical approximations for wake functions in short and long ranges are obtained by fitting procedures based on analytical estimations..
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2018-09-13
13:51
OpenAccess [PUBDB-2018-03497] Book/Report/Dissertation / PhD Thesis
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Precise jet measurements and search for supersymmetric particles with the CMS experiment
[DESY-THESIS-2018-026]
Hamburg : Verlag Deutsches Elektronen-Synchrotron, DESY-THESIS 175 pp. () [10.3204/PUBDB-2018-03497] = Dissertation, Universität Hamburg, 2018  GO
Searches for physics beyond Standard Model (SM) are one of the main goals of the CMSexperiment at the Large Hadron Collider (LHC). Among the investigated theories is Supersymmetry(SUSY), which would manifest in a production of new particles. [...]
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2018-08-31
13:03
OpenAccess [PUBDB-2018-03318] Book/Report/Dissertation / PhD Thesis
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High Precision Transverse Emittance Measurement for Novel Plasma Accelerators at the REGAE Linac
[DESY-THESIS-2018-025]
Hamburg : Verlag Deutsches Elektronen-Synchrotron, DESY-THESIS 186 pages: illustrations, figures () [10.3204/PUBDB-2018-03318] = Dissertation, Universität Hamburg, 2017  GO
The small 5 MeV linear accelerator REGAE at DESY produces ultra short and low charge electron bunches, on the one hand to resolve the excitation transitions of atoms temporally by pump-probe electron diffraction experiments and on the other hand to investigate principal mechanisms of laser plasma acceleration. In this context the external injection of the REGAE electron bunch as a probe of the generated plasma wakefield is planned. [...]
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2018-08-20
13:24
[PUBDB-2018-03068] Book

Study of Double Parton Scattering Using Four-Jet Scenariosin Proton-Proton Collisions at $\sqrt{s} = 7$ TeV with the CMS Experiment at the LHC
Basel : Springer International Publishing, Springer Theses, Recognizing Outstanding Ph.D. Research : Springer Theses, 279 () [10.1007/978-3-319-22213-4] = University of Hamburg and University of Antwerpen, Diss., 2015  GO
This thesis addresses in a very new and elegant way several measurements and the extraction of so-called double parton scattering. The new and elegant way lies in the combination of measurements and a very smart extraction of double parton scattering results, which is easy to apply and overcomes many of the technical difficulties of older methods. [...]
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