Josephson-Kryo-Spannungsnormal der PTB Bericht ueber die Entwicklungen und den Aufbau in der Zeit 1972 bis 1984

With many refs.SIGLECopy held by FIZ Karlsruhe; available from UB/TIB Hannover / FIZ - Fachinformationszzentrum Karlsruhe / TIB - Technische InformationsbibliothekDEGerman

Electron spin resonance (ESR) spectroscopy applied to radiation dosimetry and other fields

A short introduction to the theory and practice of ESR spectroscopy is given. ESR alanine dosimetry for low and high LET (linear energy transfer) ionising radiation is described, indicating its advantages over traditional methods. Problems arising in the therapy dose range (below 5 Gy), and possible future developments, are mentioned. The application of ESR to the radiation processing of materials and foodstuffs, to geological dating, biology, molecular chemistry and to medicine is discussed. Some examples of chemical analyses are also presented. (orig.)Available from TIB Hannover: RN 3295(51) / FIZ - Fachinformationszzentrum Karlsruhe / TIB - Technische InformationsbibliothekSIGLEDEGerman

Untersuchung des Fehlerverhaltens eines Brueckennormals vom Typ BN 100

Copy held by FIZ Karlsruhe; available from UB/TIB Hannover / FIZ - Fachinformationszzentrum Karlsruhe / TIB - Technische InformationsbibliothekSIGLEDEGerman

Josephson-Kontakte mit intrinsischem Shunt fuer Josephson-Spannungsnormale

Available from TIB Hannover: RN 3295(66) / FIZ - Fachinformationszzentrum Karlsruhe / TIB - Technische InformationsbibliothekSIGLEDEGerman

Physical and technological limitations of SNS Josephson junctions for large-scale integration low-temperature superconductor circuits

In this work, the physical and technological properties of SNS Josephson junctions have been investigated with respect to their limitations in highly integrated low temperature superconducting circuit applications. The developed SNS junctions have been fabricated in Niobium technology and were investigated to verify their possible implementation in superconducting circuits, as they are developed and applied in the Quantum Mechanics Department of the Physikalisch-Technische Bundesanstalt, Braunschweig, Germany. Possible applications concern the Josephson voltage standard and hereto-related RSFQ circuits. For these applications, a characteristic voltage of 100 #mu#V had to be achieved. (orig.)Available from TIB Hannover: RN 3295(86) / FIZ - Fachinformationszzentrum Karlsruhe / TIB - Technische InformationsbibliothekSIGLEDEGerman

Grundlagen der elektrischen Temperatur-Messtechnik. Elektrische Temperaturmesstechnik - Fehlerquellen

An overview is given on temperature scales, fixed points and on the physical bases, practical use and error sources and functions of electrical temperature measuring devices: resistance thermometers, semiconductor diodes and transistors, thermoelements, acoustic methods, noise thermometers, temperature dependent capacitors, fibre optical thermometers. The overview is completed by a short description of non-electrical methods. (WEN)SIGLEAvailable from TIB Hannover: RN 3295(13/14) / FIZ - Fachinformationszzentrum Karlsruhe / TIB - Technische InformationsbibliothekDEGerman

Untersuchung der Fehlerquellen bei der feldmetrischen Messung magnetischer Eigenschaften von Elektroblech bei zweidimensionaler Erregung

Available from TIB Hannover: RN 3295(56) / FIZ - Fachinformationszzentrum Karlsruhe / TIB - Technische InformationsbibliothekSIGLEDEGerman

Untersuchungen zum Einzelelektronentransport mit akustischen Oberflaechenwellen

SIGLEAvailable from TIB Hannover: RN 3295(77) / FIZ - Fachinformationszzentrum Karlsruhe / TIB - Technische InformationsbibliothekDEGerman

Low frequency behaviour of thin-film multijunction thermal converters

Thermal converters are the most accurate standards for the transfer of alternating voltage and current to the equivalent dc quantities. Today, thin-film multijunction thermal converters are used in the frequency range from 10 Hz up to 1 MHz with measurement uncertainties below 10"-"6 in the audio-frequency range. For frequencies below 100 Hz, it is known that the ac-dc transfer differences of thin-film multijunction thermal converters as well as of all other types of thermal converters increase; their origin is believed to be in the temperature oscillation in the converter due to the lack of integration of the oscillating Joule heat at decreasing frequencies. To explore the low-frequency behaviour of thermal converters, the electric-to-thermal conversion in the heater, the heat transport mechanisms in the thin films and the thermal-to-electric conversion in the thermocouples of the thin-film or planar multijunction thermal converter (PMJTC) have been analysed. The dynamic nonlinear electro-thermal differential problem was solved using the finite element method. The knowledge of the temperature distribution with ac and dc input voltages allows the ac-dc transfer difference #delta#_L_F at low frequencies to be calculated. The temperature dependence of the heater resistance, of the heat transport mechanisms, i.e. radiation and conduction through layer materials and through the air, and of the Seebeck effect was included in the nonlinear model. The accuracy of the model was tested comparing the results of the simulation with those of measurements. Parameters in the simulation were adjusted by the measurement of the sensitivity and the thermal time constant of the manufactured PMJTC. A digital method was used as a reference for the measurements. The uncertainty of this measurement method was investigated. (orig./GL)SIGLEAvailable from TIB Hannover: RN 3295(63) / FIZ - Fachinformationszzentrum Karlsruhe / TIB - Technische InformationsbibliothekDEGerman

Entwicklung von Vielfachthermokonvertern zur genauen Rueckfuehrung von Wechselgroessen auf aequivalente Gleichgroessen

SIGLECopy held by FIZ Karlsruhe; available from UB/TIB Hannover / FIZ - Fachinformationszzentrum Karlsruhe / TIB - Technische InformationsbibliothekDEGerman