BUILDING A NEW MODEL It is possible to incorporate the temperature and bias dependency of power HBTs in a model by using a thermal network to represent the self-heating and thermal coupling. Such an improved multi-finger HBT model was developed and implemented in a nonlinear circuit simulator, Serenade, from Ansoft Corp. When increasing the collector-emitter voltage of a unit finger HBT, an inc...

We present hydrodynamic predictions for the charged pion HBT radii for a range of initial conditions covering those presumably reached in Pb+Pb collisions at the LHC. We study central (b=0) and semi-central (b=7 fm) collisions and show the expected increase of the HBT radii and their azimuthal oscillations. The predicted trends in the oscillation amplitudes reflect a change of the final source ...

A DC thermal-electrical HBT model is presented in this paper. Only three parameters were needed to simulate completely an HBT with the self-heating effect, and it can be very easily implemented in any CAD softwares which use the SPICE BJT model. Parameter extractions have been carried out on several measured data and goodfittings were obtained over a wide temperature range. This model is ready ...

I compute the first viscous correction to the thermal distribution function. With this correction, I calculate the effect of viscosity on spectra, elliptic flow, and HBT radii. Indicating the breakdown of hydrodynamics, viscous corrections become of order one for pT ∼ 1.5GeV. Viscous corrections to HBT radii are particularly large and reduce the outward and longitudinal radii. This reduction is...

Bose-Einstein correlations in relativistic heavy ion collisions and their dependence on the freeze-out condition in hydrodynamic models is examined. The Cooper & Frye space-like freeze-out mechanism is compared to time-like freeze-out, where particles are emitted away only from the surface, i.e. spacevs. time-like freeze-out. The corresponding HBT radii are calculated for the two models emphasi...

Recent HBT results from the CERES experiment at the SPS are reviewed. Emphasis is put on the centrality and beam energy dependence, and the results are put into perspective with results at lower and higher beam energies. The rather weak beam energy dependence of the HBT radii may be understood in terms of a transition from baryon to pion dominated freeze-out. The observed short lifetimes and em...

Currently, the only known way to obtain experimental information about the space-time structure of a heavy-ion collision is through two-particle momentum correlations. Azimuthally sensitive Hanbury-Brown–Twiss (HBT) intensity interferometry can complement elliptic flow measurements by constraining the spatial deformation of the source and its time evolution. Performing these measurements on pho...

This paper covers the history and recent developments of GaAs BiFETs in commercial high volume GaAs HBT manufacturing environment. Further more, the paper also goes into “merged/stacked” FET-HBT integration schemes and their impacts on cost, yield and cycle time. Various circuit applications such as stage bypassing, attenuators, advanced bias circuit controls etc., that are realized in both BiF...

In a combined study on the photophysics of 2-(2'-hydroxyphenyl)-benzothiazole (HBT) in polar acetonitrile utilizing ultrafast infrared spectroscopy and quantum chemical calculations, we show that a branching of reaction pathways occurs on femtosecond time scales. Apart from the excited-state intramolecular hydrogen transfer (ESIHT) converting electronically excited enol tautomer into the keto t...