Reconstruction of Initial Beam Conditions at the Exit of the DARHT II Accelerator

We consider a technique to determine the initial beam conditions of the DARHT II Accelerator by measuring the beam size under three different magnetic transport settings. This may be time gated to resolve the parameters as a function of time within the 2000 nsec pulse. This technique leads to three equations in three unknowns with solution giving the accelerator exit beam radius, tilt and emittance. We find that systematic errors cancel and so are not a problem in unfolding the initial beam conditions. Random uncorrelated shot to shot errors can be managed by one of three strategies: 1) make the transport system optically de-magnifying; 2) average over many individual shots; or 3) make the random uncorrelated shot to shot errors sufficiently small. The high power of the DARHT II beam requires that the beam transport system leading to a radius measuring apparatus be optically magnifying. This means that the shot to shot random errors must either be made small (less than about 1%) or that we average each of the three beam radius determinations over many individual shots.Comment: 3 pages, 3 figures, LINAC2000 paper TUB1

Dilation and Asymmetric Relevance

A characterization result of dilation in terms of positive and negative association admits an extremal counterexample, which we present together with a minor repair of the result. Dilation may be asymmetric whereas covariation itself is symmetric. Dilation is still characterized in terms of positive and negative covariation, however, once the event to be dilated has been specified

Does Public Good Provision Determine Incumbent’s Fate? Evidence from India

In this paper we empirically examine whether public facilities like providing primary school, medical clinics, electricity etc help incumbents to stay in power. Specifically, we analyze the parliamentary election outcomes in 483 constituents in rural India from 1971 to 1991. This study is based on a simple voter model where the voter looks at the supply of public goods provided by the incumbent and then decides whether to re-elect the incumbent. We find empirical evidence that voters do significantly care about educational, electricity and communication facilities, whereas incumbents face defeat if they provide more medical or safe drinking water facilities.Election and voting behavior; performance of government; public good; inter-jurisdictional differential and their effect; India

Engineering technology for networks

Space Network (SN) modeling and evaluation are presented. The following tasks are included: Network Modeling (developing measures and metrics for SN, modeling of the Network Control Center (NCC), using knowledge acquired from the NCC to model the SNC, and modeling the SN); and Space Network Resource scheduling

Statistical models with covariance constraints

Imperial Users onl

Waterfowl Harvest and Hunter Use at Carlyle Lake During the 1973 Season

Division of Wildlife Resources Migratory Bird Section, Periodic Report No. 7Report issued on: April 15, 197