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ebook
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Experience Operating an X-band High-Power Test Stand at CERN
/ Catalan-Lasheras, N (CERN) ; Degiovanni, A (CERN) ; Doebert, S (CERN) ; Farabolini, W (CERN) ; Kovermann, J (CERN) ; McMonagle, G (CERN) ; Rey, S (CERN) ; Syratchev, I (CERN) ; Timeo, L (CERN) ; Wuensch, W (CERN) et al.
CERN has constructed and is operating a klystron-based X-band test stand, called Xbox-1, dedicated to the high-gradient testing of prototype accelerating structures for CLIC and other applications such as FELs. The test stand has now been in operation for a year and significant progress has been made in understanding the system, improving its reliability, upgrading hardware and implementing automatic algorithms for conditioning the accelerating structures..
CERN-ACC-2014-0166.-
Geneva : CERN, 2014 - 4 p.
Fulltext: PDF; External link: Published version from JaCoW
In : 5th International Particle Accelerator Conference, Dresden, Germany, 15 - 20 Jun 2014, pp.2288
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High-Gradient test results from a CLIC prototype accelerating structure : TD26CC
/ Degiovanni, A (CERN) ; Doebert, S (CERN) ; Farabolini, W (CERN) ; Grudiev, A (CERN) ; Kovermann, J (CERN) ; Montessinos, E (CERN) ; Riddone, G (CERN) ; Syratchev, I (CERN) ; Wegner, R (CERN) ; Wuensch, W (CERN) et al.
The CLIC study has progressively tested prototype accelerating structures which incorporate an ever increasing number of features which are needed for a final version ready to be installed in a linear collider. The most recent high power test made in the CERN X-band test stand, Xbox-1, is of a CERN-built prototype which includes damping features but also compact input and output power couplers, which maximize the overall length to active gradient ratio of the structure. [...]
CERN-ACC-2014-0147; CLIC-Note-1042.-
Geneva : CERN, 2014 - 4 p.
- Published in : 10.18429/JACoW-IPAC2014-WEPME015
Fulltext: CLIC-Note-1042 - PDF; CERN-ACC-2014-0147 - PDF; External link: Published version from JaCoW
In : 5th International Particle Accelerator Conference, Dresden, Germany, 15 - 20 Jun 2014, pp.2285
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Novel diagnostics for breakdown studies
/ Jacewicz, M (Uppsala U.) ; Borgmann, Ch (Uppsala U.) ; Olvegard, M (Uppsala U.) ; Ruber, R (Uppsala U.) ; Ziemann, V (Uppsala U.) ; Kovermann, J W (CERN)
2013
Published version from JACoW: PDF;
In : 2nd International Beam Instrumentation Conference, Oxford, UK, 16 - 19 Sep 2013, pp.MOPF30
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A 12 kV, 1 kHz, Pulse Generator for Breakdown Studies of Samples for CLIC RF Accelerating Structures
/ Soares, R H (CERN) ; Barnes, M J (CERN) ; Kovermann, J (CERN) ; Calatroni, S (CERN) ; Wuensch, W (CERN)
Compact Linear Collider (CLIC) RF structures must be capable of sustaining high surface electric fields, in excess of 200 MV/m, with a breakdown (BD) rate below 3×10-7 breakdowns/pulse/m. Achieving such a low rate requires a detailed understanding of all the steps involved in the mechanism of breakdown. [...]
CERN-ATS-2012-220; CLIC-Note-973.-
Geneva : CERN, 2012 - 4 p.
- Published in : Conf. Proc.: C1205201 (2012) , pp. THPPC061
Fulltext: CERN-ATS-2012-220 - PDF; CLIC_note_973 - PDF; External link: Published version from JaCoW
In : 3rd International Particle Accelerator Conference, New Orleans, LA, USA, 20 - 25 May 2012, pp.3431
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Commissioning of the First Klystron-Based X-Band Power Source at CERN
/ Kovermann, J (CERN) ; Catalan-Lasheras, N (CERN) ; Curt, S (CERN) ; Doebert, S (CERN) ; Naon, M (CERN) ; McMonagle, G (CERN) ; Paju, E (CERN) ; Rey, S (CERN) ; Riddone, G (CERN) ; Schirm, K (CERN) et al.
A new klystron based X-band rf power source operating at 11.994 GHz has been installed and started to be commissioned at CERN in collaboration with CEA Saclay and SLAC for CLIC accelerating structure tests. The system comprises a solid state high voltage modulator, an XL5 klystron developed by SLAC, a cavity based SLED type pulse compressor, the necessary low level rf system including rf diagnostics and interlocks and the surrounding vacuum, cooling and controls infrastructure. [...]
CERN-ATS-2012-131; CLIC-Note-969.-
Geneva : CERN, 2012 - 3 p.
- Published in : Conf. Proc.: C1205201 (2012) , pp. THPPC060
Fulltext: CERN-ATS-2012-131 - PDF; CLIC_note_969 - PDF; External link: Published version from JaCoW
In : 3rd International Particle Accelerator Conference, New Orleans, LA, USA, 20 - 25 May 2012, pp.3428
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Comparative study of experimental signals for multipactor and breakdown.
/ Dehler, Micha (CERN ; PSI, Villigen) ; Verdu-Andrès, Silvia (PSI, Villigen) ; Wuensch, Walter (CERN) ; Faus-Golfe, Angeles (Valencia U., IFIC) ; Gimeno Martinez, Benito (Valencia U.) ; Kovermann, Jan (CERN) ; Boria, Vicente (Valencia, Polytechnic U.) ; Raboso, David (ESA, Madrid)
Performance limiting high-power rf phenomenon occur in both transmitter systems in satellites and high-gradient accelerating structures in particle accelerators. [...]
CERN-OPEN-2012-008 ; CLIC-Note-936.
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2012 - 8.
Preprint
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A One-Dimensional Particle-in-Cell Model of Plasma Build-Up in Vacuum Arcs
/ Timko, H (Helsinki U. ; Helsinki Inst. of Phys. ; CERN) ; Djurabekova, F (Helsinki U. ; Helsinki Inst. of Phys.) ; Kovermann, J (CERN) ; Taborelli, M (CERN) ; Nordlund, K (Helsinki U. ; Helsinki Inst. of Phys.) ; Descoeudres, A (CERN) ; Schneider, R (Greifswald, Max Planck Inst.) ; Calatroni, S (CERN) ; Matyash, K (Greifswald, Max Planck Inst.) ; Wuensch, W (CERN) et al.
Understanding the mechanism of plasma build-up in vacuum arcs is essential in many fields of physics. A one-dimensional particle-in-cell computer simulation model is presented, which models the plasma developing from a field emitter tip under electrical breakdown conditions, taking into account the relevant physical phenomena [...]
2011
- Published in : Contrib. Plasma Phys. 51 (2011) 5-21
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