ATTENUATOR Controller

 1. Introduction

The device dynamically changes attenuating metal (Al and Pb) foils on the front of proportional detector at B2 station in Hasylab/DESY.
The aim is to simplify adjustment procedures as well as enable measurements of high intensity reflections (e.g. small angle scattering), including direct beam.
You can adjust attenuation in wide range: 100 attenuating combinations are allowed (see "Attenuation wheels - hardware description" section below) from 0 (no foils) up to 2.5mmPb + 0.45mmAl (pretty beam stop). User defined socket is available.

Authors:
Stanislaw Gierlotka ¹⁾ created mechanics of attenuator
Heinz-Hermann Brecht and Michael Knapp ²⁾ made beautiful controller box
Roman Pielaszek ^1,3) made electronic hardware, software and this documentation

Affiliations:
¹⁾ High Pressure Research Centre, Polish Academy of Sciences, ul.Sokolowska 29/37, 01-142 Warsaw, POLAND
²⁾ Hasylab, DESY, Notkestr.85, Hamburg, GERMANY
³⁾ Warsaw University, Department of Physics, ul.Hoza 69, 00-681 Warsaw, POLAND

Hamburg, 30/11/1999