Development and Performance Verification of the GANDALF High-Resolution Transient Recorder System

With present-day detectors in high energy physics one often faces fast analog pulses of a few nanoseconds length which cover large dynamic ranges. In many experiments both amplitude and timing information have to be measured with high accuracy. Additionally, the data rate per readout channel can reach several MHz, which leads to high demands on the separation of pile-up pulses. For an upgrade of the COMPASS experiment at CERN we have designed the GANDALF transient recorder with a resolution of 12bit@1GS/s and an analog bandwidth of 500\:MHz. Signals are digitized with high precision and processed by fast algorithms to extract pulse arrival times and amplitudes in real-time and to generate trigger signals for the experiment. With up to 16 analog channels, deep memories and a high data rate interface, this 6U-VME64x/VXS module is not only a dead-time free digitization unit but also has huge numerical capabilities provided by the implementation of a Virtex5-SXT FPGA. Fast algorithms implemented in the FPGA may be used to disentangle possible pile-up pulses and determine timing information from sampled pulse shapes with a time resolution better than 50 ps.Comment: 5 pages, 9 figure

Ergebnisse der Albanien-Expedition 1961 des Deutschen Entomologischen Institutes. 62. Beitrag. Bibliographie zur entomologischen Erforschung Albaniens. II. Teil.

Dieser 11. Teil der Albanien-Bibliographie umfaßt insgesamt 221 Arbeiten, die Originalhinweise auf Albanien-Fundorte oder Neubeschreibungen aus Albanien bringen. Aufgenommen wurden auch alle bisher erschienenen Beiträge zur Auswertung der Albanien-Expedition des Deutschen Entomologischen Institutes. Soweit es nötig war, ist den Zitaten eine kurze Inhaltsangabe beigefügt.This is the second part of a bibliography on Albania. It has 221 entries of publications original references to finds in Albania or new descriptions from Albania. All papers published so far in evaluation of the expedition to Albania by Deutsches Entomogisches Institut are included. If necessary, a short abstract is added to the entry

Chirurgisch-endovaskuläres Hybridverfahren bei Pathologien der thorakalen Aorta: Chirurgisches Vorgehen und Outcome

An 25 Patienten mit dilatativen Aortenerkrankungen im Bereich der Aorta descendens wurde der peri- und postoperative Verlauf nach chirurgisch-endovaskulärem Hybridverfahren untersucht. In fast allen Fällen erfolgte zuerst die chirurgische Revaskularisation der LSA, um eine ausreichende Landungszone für den Stentgraft zu schaffen. Besonders Hochrisikopatienten scheinen von diesem Hybridverfahren zu profitieren. Die Spätmortalität von 8% ist niedrig im Vergleich zur konventionell-chirurgischen Therapie. Die gefürchteten neurologischen Komplikationen konnten zudem im Wesentlichen eliminiert werden

Analysing powers for the reaction n⃗p→ppπ−\vec{\rm n} {\rm p} \to {\rm p} {\rm p} \pi^{-} and for np elastic scattering from 270 to 570 MeV

The analysing power of the reaction ${\rm n}{\rm p} \to {\rm p}{\rm p} \pi^{-}$ for neutron energies between threshold and 570 MeV has been determined using a transversely polarised neutron beam at PSI. The reaction has been studied in a kinematically complete measurement using a time-of-flight spectrometer with large acceptance. Analysing powers have been determined as a function of the c.m. pion angle in different regions of the proton-proton invariant mass. They are compared to other data from the reactions ${\rm n}{\rm p} \to {\rm p}{\rm p} \pi^{-}$ and ${{\rm p}{\rm p} \to {\rm p}{\rm p} \pi^{0}}$. The np elastic scattering analysing power was determined as a by-product of the measurements.Comment: 12 pages, 6 figures, subitted to EPJ-

The reaction np→ppπ−{n} {p} \to {p} {p} \pi^{-} from threshold up to 570 MeV

The reaction ${n} {p} \to {p} {p} \pi^{-}$ has been studied in a kinematically complete measurement with a large acceptance time-of-flight spectrometer for incident neutron energies between threshold and 570 MeV. The proton-proton invariant mass distributions show a strong enhancement due to the pp($^{1}{S}_{0}$) final state interaction. A large anisotropy was found in the pion angular distributions in contrast to the reaction ${p}{p} \to {p}{p} \pi^{0}$. At small energies, a large forward/backward asymmetry has been observed. From the measured integrated cross section $\sigma({n}{p} \to {\rm p}{p} \pi^{-})$, the isoscalar cross section $\sigma_{01}$ has been extracted. Its energy dependence indicates that mainly partial waves with Sp final states contribute. Note: Due to a coding error, the differential cross sections ${d \sigma}/{d M_{pp}}$ as shown in Fig. 9 are too small by a factor of two, and inn Table 3 the differential cross sections ${d \sigma}/{d \Omega_{\pi}^{*}}$ are too large by a factor of $10/2\pi$. The integrated cross sections and all conclusions remain unchanged. A corresponding erratum has been submitted and accepted by European Physics Journal.Comment: 18 pages, 16 figure

Digitalisierung in der Immobilienwirtschaft

DIGITALISIERUNG IN DER IMMOBILIENWIRTSCHAFT Digitalisierung in der Immobilienwirtschaft / Bölting, Torsten (Rights reserved) ( -

Development of a 1 GS/s high-resolution transient recorder

With present-day detectors in high energy physics one is often faced with short analog pulses of a few nanoseconds length which may cover large dynamic ranges. In many experiments both amplitude and timing information have to be measured with high accuracy. Additionally, the data rate per readout channel can reach several MHz, which makes high demands on the separation of pile-up pulses. For such applications we have built the GANDALF transient recorder with a resolution of 12bit@1GS/s and an analog bandwidth of 500 MHz. Signals are digitized and processed by fast algorithms to extract pulse arrival times and amplitudes in real-time and to generate experiment trigger signals. With up to 16 analog channels, deep memories and a high data rate interface, this 6U-VME64x/VXS module is not only a dead-time free digitization unit but also has huge numerical capabilities provided by the implementation of a Virtex5-SXT FPGA. Fast algorithms implemented in the FPGA may be used to disentangle possible pile-up pulses and determine timing information from sampled pulse shapes with a time resolution in the picosecond range. Recently the application spectrum has been extended by implementing a 128-channel time-to-digital converter inside the FPGA and an appropriate input mezzanine card