Design and test of a NbTi prototype coil for a low beta section

The design of superconducting quadrupoles for a proton and antiproton low beta section and the test of a prototype coil are presented. Previous studies [1,2] show that high gradient and short quadrupole magnets are required for a compact low beta section in order to allow the insertion of such a magnetic system with minor changes of the lattice [3]; each quadrupole is 400 mm long and has to provide a magnetic induction gradient of 60 T/m. A beam pipe of at least 120 mm diameter is required to avoid beam loss during injection and before the beam cooling. The magnetic design of the superconducting magnets for the low beta section is presented, together with a detailed discussion of the quench protection design. Two prototype coils were produced and one of them was tested. A detailed description of the test setup and a full discussion of the results will be presented

Entwicklung und Optimierung eines Hochtemperaturkopplungssystems Thermoanalysator Massenspektrometer

The development of a high temperature coupling system was accomplished to carry out thermodynamic investigations during glass melting to solidify highly radioactive fission products into glass at a temperature up to 1200 °C. The actual problem consisted of the fact that the gas species evaporating from the melter have to pass without condensation or without change of their composition a multistage pressure reducing system to enter the analysator unit of the mass spectrometer in the high vacuum. With the systems, offered at present, this is only possible up to approximately 450 °C. The development of a new high temperature coupling includedinvestigations of the gas dynamics, raw materials and thermic behaviour. During the investigations the following results were accomplished: 1. The required sensitivity of detecting (substances with P$_{D} \leq$ 0.1 mb (and upwards)) is only achievable by means of nozzle-skimmer-arrangements. The skimmer is to be moved into the position directly in front of the Mach-disk at the very end of the overexpanded beam zone (of the outer nozzle). Construction permitting, the distance mass spectrometer-melting sample should be brought to a minimum. 2. The parts of the coupling system were made of a kind of chrome-nickel-steel which was resistant to high temperatures and non-corrodible up to 1180 °C; the tightenings were of platinium. An alternative installation of ceramic nozzles into the present system may be possible at any time because of the interchangeability of the elements. [...

Entwicklung eines Hochtemperaturofens - zur Kopplung eines Thermoanalysengerätes mit einem Massenspektrometer

Für thermogravimetrische Untersuchungen spielt die homogene Temperaturverteilung im Probenbereich für die Genauigkeit der Meßergebnisse eine entscheidende Rolle. Dies läßt sich relativ leicht durch einen möglichst großen Heizofen erreichen. Für die im ICT zur Zeit entwickelte Kopplung einer Thermowaage mit einem Massenspektrometer hat ein großer Ofen den Nachteil, daß sich der Abstand Probe $\rightarrow$ Ionenquellenstoßraum (MS) ebenfalls vergrößert. Da die Menge der von der Probe abdampfenden Molekülspezies mit dem Quadrat der Entfernung abnimmt, sollte der Abstand jedoch möglichst gering sein. Somit ergibt sich die Notwendigkeit der Entwicklung eines möglichst kleinen Hochtemperaturofens ($\le$ 1300 °C) mit homogener Temperaturverteilung im Probenbereich. Zusätzlich zu diesen Bedingungen muß bei der Kopplung der beiden analytischen Systeme (TG/MS) berücksichtigt werden, daß die Gas Zuführung zum MS über ein 2-stufiges Blendensystem zur Druckreduzierung erfolgen muß. Um ein Auskondensieren der Dampfphase am Blendensystem zu verhindern, sollten die Blenden auf Probentemperatur aufgeheizt werden.Für die Entwicklung dieses Ofens wurden folgende Parameter untersucht: [...