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Szecsi, L.; Friedburg, H.
Kernforschungszentrum Karlsruhe G.m.b.H. (Germany, F.R.); Deutsches Patentamt, Muenchen (Germany, F.R.)1978
Kernforschungszentrum Karlsruhe G.m.b.H. (Germany, F.R.); Deutsches Patentamt, Muenchen (Germany, F.R.)1978
AbstractAbstract
[en] The cavity resonator is designed axially symmetrical with respect to the beam axis. It consists of two end pieces being composed of two plate-shaped half shells and welded together at the outer border and at the inner opening for the radiation passage. Both end pieces are connected by means of pipes forming a cylindrical structure with interrupted side walls. Through the end pieces and the pipes there may be passed a coolant, especially helium if a niobium material for superconduction is used. The surfaces of the end pieces and the pipes are chemically or electrochemically refined. (DG)
[de]
Der Hohlraumresonator ist rotationssymmetrisch zur Strahlenachse aufgebaut. Er besteht aus zwei Endstuecken, die aus jeweils zwei tellerfoermigen Halbschalen bestehen und am Aussenrand sowie an der Innenoeffnung fuer den Strahldurchgang miteinander verschweisst sind. Beide Endstuecke sind mittels Rohren verbunden, so dass eine zylinderfoermige Struktur mit durchbrochenen Seitenwaenden entsteht. Durch die Endstuecke und die Rohre kann Kuehlmittel, insbesondere Helium bei Verwendung von Niobmaterial fuer Supraleitung, hindurchgefuehrt werden. Die Oberflaechen der Endstuecke und der Rohre sind chemisch oder elektrochemisch verguetet. (DG)Original Title
Hochfrequenz-Hohlraumresonator
Primary Subject
Secondary Subject
Source
7 Sep 1978; 4 p; DE PATENT DOCUMENT 2630310/C/
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Patent
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Proch, D.; Thiele, K.
Deutsches Elektronen-Synchrotron (DESY), Hamburg (Germany, F.R.)1985
Deutsches Elektronen-Synchrotron (DESY), Hamburg (Germany, F.R.)1985
AbstractAbstract
[en] A cavity of an acceleration unit built up from one or more individual resonators is filled to about half way with ceramic grinding bodies and with water, and turned slowly at about 9 rpm. The rotation is maintained for about a week. The inner surface of the cavity is thus smoothed and freed of faults, so that the cavity can be used without difficulty in superconducting operation with improved properties. By this simple process, success is achieved in increasing the practically possible longitudinal field strength for acceleration by at least a factor of 2 or more, i.e. one can save at least half the acceleration units. To remove grinding wear, the cavity is also filled with an acid mixture of about 1 part of HF, 1 part of HNO3 and 6 parts of H3PO4 and cleaned, and the surface is etched. (orig.)
[de]
Ein aus einem oder mehreren Einzelresonatoren aufgebautes Cavity einer Beschleunigungseinheit wird mit keramischen Schleifkoerpern und mit Wasser etwa zur Haelfte gefuellt und in langsame Drehungen von etwa 9 U/Min versetzt. Die Drehungen werden etwa eine Woche lang aufrechterhalten. Dabei wird die innere Oberflaeche des Cavity's derart geglaettet und von Fehlern befreit, dass das Cavity ohne Schwierigkeiten im supraleitenden Betrieb mit erheblich verbesserten Eigenschaften eingesetzt werden kann. Durch das angegebene einfache Verfahren gelingt es naemlich, die im praktischen Betrieb erreichbare Laengsfeldstaerke zur Beschleunigung um mindestens einen Faktor 2 oder mehr zu erhoehen, d.h. mindestens die Haelfte der Beschleunigungseinheiten einzusparen. Zur Entfernung von Schleifkoerper-Abrieb wird das Cavity ausserdem mit einer Saeuremischung von etwa 1 T HF, 1 T HNO3 und 6 T H3PO4 gefuellt und so gereinigt und dabei oberflaechlich gebeizt. (orig.)Original Title
Verfahren zur Behandlung der inneren Oberflaeche von supraleitenden Cavities (Hohlraum-Resonatoren)
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Source
4 Jul 1985; 21 Dec 1983; 11 p; DE PATENT DOCUMENT 3346178/A1/; ?: 21 Dec 1983
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Patent
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AbstractAbstract
No abstract available
Original Title
Ein supraleitender Blei-Resonator
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Source
Spring meeting of the Fachausschuss Kern- und Hochenergiephysik of DPG (Sektion A: Kernphysik) of the Fachausschuss Kern- und Teilchenphysik of OePG and Sektion Kern- und Hochenergiephysik of SPG; Innsbruck (Austria); 26-30 Mar 1984; Published in summary form only.; CODEN: VDPEA.
Record Type
Journal Article
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Conference
Journal
Verhandlungen der Deutschen Physikalischen Gesellschaft; ISSN 0420-0195;
; v. 19(3); p. 893-894

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Diepers, H.; Schmidt, O.; Kress, R.
Siemens A.G., Berlin (Germany, F.R.); Siemens A.G., Muenchen (Germany, F.R.)1977
Siemens A.G., Berlin (Germany, F.R.); Siemens A.G., Muenchen (Germany, F.R.)1977
AbstractAbstract
[en] The invention deals with a method for the anodic oxidation of the inner surface of superconducting niobium hollow bodies such as e.g. used as high-frequency resonators, separators for particle accelerators or in tube-form as conductor for superconducting cables. According to the invention, the niobium hollow body is continuously turned around a rotational axis running through the opening, so that the individual parts of its inner surface are dipped into the electrolyte after one another, so that the gases formed on the cathode below the electrolyte level do not touch the inner surface of the niobium body. There must always be a free space present connected through the opening to the outer surroundings between the electrolyte level and all parts of the inner surface of the niobium hollow body above it. (HPOE.)
[de]
Die Erfindung betrifft ein Verfahren zur anodischen Oxidation der Innenflaeche von supraleitfaehigen Niobhohlkoerpern, wie sie z.B. Anwendung finden als Hochfrequenzresonatoren, Separatoren fuer Teilchenbeschleuniger oder in Rohrform als Leiter fuer supraleitende Kabel. Erfindungsgemaess wird der Niobhohlkoerper staendig um eine durch die Oeffnung verlaufende Drehachse gedreht, so dass die einzelnen Teile seiner Innenflaeche nacheinander in den Elektrolyten eintauchen, jedoch kein Teil der Innenflaeche staendig im Elektrolyten verbleibt, damit die an der Kathode gebildeten Gase unterhalb des Elektrolytspiegels nicht an die Innenflaeche des Niobhohlkoerpers gelangen. Dazu muss zwischen dem Elektrolytspiegel und allen oberhalb von ihm befindlichen Teilen der Innenflaeche des Niobhohlkoerpers immer ein zusammenhaengender, durch die Oeffnung mit der aeusseren Umgebung in Verbindung stehender freier Raum vorhanden sein. (HPOE.)Original Title
Verfahren zur anodischen Oxidation der Innenflaeche eines mit wenigstens einer Oeffnung versehenen supraleitfaehigen Niobhohlkoerpers
Primary Subject
Source
12 May 1977; 5 p; DE PATENT DOCUMENT 2146785/C/; Available from ZAED. Also available from Dt. Patentamt, Muenchen (FRG); 1 fig.
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Patent
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AbstractAbstract
[en] Performance of niobium superconducting cavities are highly dependent of surface quality. Means to decrease energy dissipation are briefly reviewed
Original Title
Les cavites supraconductrices: de la physique des surfaces au developpement technologique
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Journal Article
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AbstractAbstract
[en] Using a six cell periodic plane symmetric structure, values of resonant frequencies and the quality factor Q0 were measured for different field configurations of the accelerating and deflecting modes in the S-band. Best results were obtained for a structure which is open along its sides, resonating in the π/2 mode
[fr]
Les valeurs des frequences de resonances, du coefficient de surtension Q0 pour differentes configurations du mode accelerateur - et du mode deflecteur - ont ete mesurees sur un prototype de cavite a 6 auges rectangulaires a symetrie plane fonctionnant en bandes S. Les meilleures performances sont atteintes lorsque la structure est ouverte sur les cotes lateraux, et resonne sur le mode π/2Original Title
Structure acceleratrice de symetrie plane a auges rectangulaires
Primary Subject
Record Type
Journal Article
Journal
J. Phys. (Paris), Lett; v. 37(11); p. 317-320
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Kuntze, M.
Proceedings of the 1976 proton linear accelerator conference, September 14 to 17, 19761976
Proceedings of the 1976 proton linear accelerator conference, September 14 to 17, 19761976
AbstractAbstract
[en] The paper summarizes the status of the most advanced superconducting slow-wave resonators of the helical, split-ring, re-entrant, Alvarez and Iris type
Primary Subject
Source
Schriber, S.O. (ed.); Atomic Energy of Canada Ltd., Chalk River, Ontario. Chalk River Nuclear Labs; p. 86-94; Nov 1976; p. 86-94; 1976 proton linear accelerator conference; Chalk River, Canada; 14 - 17 Sep 1976
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Report
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AbstractAbstract
[en] I have restricted this compilation to those applications of rf superconductivity where high fields are needed. So I have left aside applications such as frequency standards etc. I shall instantly show a table in which the laboratories upon whose work I will report are listed. I think it is important to point out that some superconducting devices have been in duty now for some time, some for several thousand hours. A question is what Q-values or what surface resistances can be obtained and high β-structures and low β-structures are described. (orig./WTR)
Secondary Subject
Source
Kuntze, M. (ed.); Kernforschungszentrum Karlsruhe G.m.b.H. (Germany, F.R.); 340 p; Nov 1980; p. 3-26; Workshop on rf superconductivity; Karlsruhe, Germany, F.R; 2 - 4 Jul 1980
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Report
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Kircher, F.
CEA Centre d'Etudes de Saclay, 91 - Gif-sur-Yvette (France). Dept. d'Astrophysique, de la Physique des Particules, de la Physique Nucleaire et de l'Instrumentation Associee1992
CEA Centre d'Etudes de Saclay, 91 - Gif-sur-Yvette (France). Dept. d'Astrophysique, de la Physique des Particules, de la Physique Nucleaire et de l'Instrumentation Associee1992
AbstractAbstract
[en] Performance and applications of superconducting cavities and superconducting magnets, using liquid or superfluid helium, are reviewed
Original Title
Applications de la supraconductivite dans les grands appareils pour la physique
Source
1992; 8 p; Meeting on Technology; Paris (France); 24-25 Mar 1992
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Report
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AbstractAbstract
[en] A method is outlined for conditioning resonators which has produced a significant increase in accelerating gradient and also a design for a split-ring resonator with an optimum particle velocity of 0.16 c. Results of using a 1500 watt rf source to condition superconducting split-ring resonators are described. By repetitively pulsing for a few msec to field levels as high as an 8 MV/m effective accelerating field Ea, electron loading at high field levels has been substantially reduced. The 145.5 MHz resonator is contained in the same 16 inch diameter, 14 inch length housing used for the /beta/.0.1 Argonne split-ring. In design of the split ring element, a 20% reduction in peak surface electric field has been achieved with no significant increase in surface magnetic field. 5 refs
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Source
Particle accelerator conference; Washington, DC (USA); 11 - 13 Mar 1981; CONF-810314--
Record Type
Journal Article
Literature Type
Conference
Journal
IEEE Transactions on Nuclear Science; ISSN 0018-9499;
; v. NS-28(3); p. 3248-3250

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