1 m vacuum monochromator

M/M/1 Feedback Queue Subject to Catastrophe and Repairment

‎In this paper‎, ‎an M/M/1 queue with instantaneous Bernoulli feedback is studied in the event of server failure‎, ‎the catastrophe occurs and after repair‎, ‎it starts to work again‎. ‎The transient response for the probability function of the system size is presented‎. ‎The steady state analysis of system size probabilities and some performance measures of system are provided‎. ‎Then the resu...

Vacuum Stability in Heterotic M-Theory

The problem of the stabilization of moduli is discussed within the context of compactified strongly coupled heterotic string theory. It is shown that all geometric, vector bundle and five-brane moduli are completely fixed, within a phenomenologically acceptable range, by non-perturbative physics. This result requires, in addition to the full space of moduli, non-vanishing Neveu-Schwarz flux, ga...

New PointFocusing Monochromator

Microprocessor–based monochromator controller

Vacuum Tracking 1

A method to determine longitudinal pressure profiles in the presence of pumps and outgassing elements in conductance limited vacuum systems by a transfer matrix formalism is discussed. The algorithm is capable of dealing with multiple connected vacuum systems. An implementation of this method in the computer codes VAKTRAK and VAKLOOP is briefly described.