Integrated information system for demographic statistics ´ESGRAON-TDS´ in Bulgaria

In this paper we describe the Bulgarian statistical system that provides unique research possibilities for demographic analyses. In particular, we review the methodology, structure and informational flows for population registration and the registration of vital events in Bulgaria. In addition, we describe the main elements of the most recent Bulgarian census from March 1, 2001. In the last part of the paper, we pay special attention to data protection and data confidentiality issues in Bulgaria.

Integrated Information System for Demographic Statistics 'ESGRAON-TDS' in Bulgaria

In this paper we describe the Bulgarian statistical system that provides unique research possibilities for demographic analyses. In particular, we review the methodology, structure and informational flows for population registration and the registration of vital events in Bulgaria. In addition, we describe the main elements of the most recent Bulgarian census from March 1, 2001. In the last part of the paper, we pay special attention to data protection and data confidentiality issues in Bulgaria.Bulgaria, census, demographic statistics, statistics

Analysis of long-range studies in the lhc - Comparison with the model

We find that the observed dependencies (scaling) of long-range beam-beam effects on the beam separation and intensity are consistent with the simple assumption that, all other parameters being the same, the quantity preserved during different set-ups is the first-order smear as a function of amplitude.Comment: 8 pages, contribution to the ICFA Mini-Workshop on Beam-Beam Effects in Hadron Colliders, CERN, Geneva, Switzerland, 18-22 Mar 201

Results of dynamic aperture studies for increased beta* with beam-beam interactions

We have evaluated the dynamic aperture in the presence of beam-beam effects for alternative running scenarios, in particular for the commissioning and early operation of the LHC. For top energy of 7 TeV we have studied the effect of increased beta* up to beta* = 2 m and found the expected increase of dynamic aperture for a moderate loss of luminosity. We have further studied the possibility of head-on collisions with a small number of bunches at injection energy

Analytical calculation of the smear for long-range beam-beam interactions

The Lie-algebraic method is used to develop generalized Courant-Snyder invariant in the presence of an arbitrary number of beam-beam collisions, head-on or long-range, in a storage ring collider. The invariant is obtained by concatenating nonlinear beam-beam maps in the horizontal plane and to first order in the beam-beam parameter. Tracking evidence is presented to illustrate that with LHC parameters the invariant is indeed preserved and can be used to predict the smear of horizontal emittance observed in tracking simulations. We discuss the limits of applicability of this model for realistic LHC collision schemes

Long Range Beam-beam Effects in the LHC

We report on the experience with long-range beam--beam effects in the LHC, in dedicated studies as well as the experience from operation. Where possible, we compare the observations with the expectations.Comment: Presented at the ICFA Mini-Workshop on Beam-Beam in Hadron Colliders, CERN, Geneva, Switzerland, 18-22 March 201